.language-picker{display:inline-block}.language-picker-select{padding:var(--space-xs) var(--space-sm);font-size:.875rem;font-weight:500;color:var(--color-text);background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-md);cursor:pointer;transition:all .2s ease;-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%23666' stroke-width='2' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 8px center;padding-right:32px}.language-picker-select:hover{border-color:var(--color-primary);background-color:#fff}.language-picker-select:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #4f46e51a}@media (max-width: 768px){.language-picker-select{font-size:.8125rem;padding:6px 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.pillar-flip-card{transform:rotateY(180deg)}.pillar-flip-front,.pillar-flip-back{width:100%;backface-visibility:hidden;-webkit-backface-visibility:hidden;border-radius:var(--radius-xl);padding:var(--space-2xl);text-align:center}.pillar-flip-front{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;text-decoration:none;min-height:280px;height:100%}.pillar-flip-front:hover{text-decoration:none}.pillar-flip-back{position:absolute;top:0;left:0;width:100%;height:100%;transform:rotateY(180deg);display:flex;align-items:center;justify-content:center;overflow:hidden;pointer-events:none}.pillar-flip-container.is-hovered .pillar-flip-back{pointer-events:auto}.pillar-flip-container.is-hovered .pillar-flip-front{pointer-events:none}.pillar-flip-back-content{width:100%;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--space-md)}.fade-in{animation:fade-in .35s ease both}@keyframes fade-in{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}@keyframes pop-in{0%{transform:scale(0)}70%{transform:scale(1.2)}to{transform:scale(1)}}.demo-dots{display:flex;gap:6px;margin-top:var(--space-md)}.demo-dot{width:6px;height:6px;border-radius:50%;background:#0003;transition:all .2s ease}.demo-dot.active{background:var(--color-primary);transform:scale(1.3)}.demo-flashcard{display:flex;flex-direction:column;align-items:center;width:100%}.demo-card{width:140px;height:90px;position:relative;transform-style:preserve-3d;transition:transform .5s ease}.demo-card.flipped{transform:rotateX(180deg)}.demo-card-front,.demo-card-back{position:absolute;width:100%;height:100%;backface-visibility:hidden;-webkit-backface-visibility:hidden;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-lg);background:#fff;box-shadow:var(--shadow-md)}.demo-card-back{transform:rotateX(180deg);background:linear-gradient(135deg,#667eea,#764ba2);color:#fff}.demo-word{font-size:1.25rem;font-weight:700;color:var(--color-text)}.demo-translation{font-size:1.25rem;font-weight:700}.demo-quiz{display:flex;flex-direction:column;align-items:center;width:100%}.demo-quiz-word{font-size:1.125rem;font-weight:700;color:var(--color-text);margin-bottom:var(--space-sm)}.demo-quiz-options{display:grid;grid-template-columns:1fr 1fr;gap:6px;width:100%;max-width:200px}.demo-quiz-option{padding:.375rem .5rem;background:#fff;border:2px solid var(--color-border);border-radius:var(--radius-md);font-size:.75rem;font-weight:500;text-align:center;transition:all .2s ease}.demo-quiz-option.selected{border-color:var(--color-primary);background:#ff6b6b1a}.demo-quiz-option.correct{border-color:var(--color-success);background:#10b98126;color:var(--color-success)}.demo-crossword{display:flex;flex-direction:column;align-items:center;width:100%;position:relative}.demo-crossword-container{display:flex;gap:var(--space-sm);align-items:flex-start}.demo-crossword-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:2px}.demo-crossword-cell{width:22px;height:22px;display:flex;align-items:center;justify-content:center;background:#fff;border:1.5px solid var(--color-border);border-radius:2px;font-size:.75rem;font-weight:700;color:var(--color-text);transition:all .15s ease;position:relative}.demo-crossword-cell.empty{background:#1a1a2e;border-color:#1a1a2e}.demo-crossword-cell.filled{border-color:var(--color-primary);background:#ff6b6b1a}.demo-crossword-cell.correct{border-color:var(--color-success);background:#10b98126;color:var(--color-success)}.demo-crossword-num{position:absolute;top:1px;left:2px;font-size:.5rem;font-weight:600;color:var(--color-text-muted)}.demo-crossword-letter{font-size:.75rem}.demo-crossword-clues{display:flex;flex-direction:column;gap:4px}.demo-crossword-clue{display:flex;align-items:center;gap:4px;font-size:.625rem;color:var(--color-text-secondary)}.demo-clue-num{font-size:.5rem;font-weight:600;opacity:.8;min-width:16px}.demo-math-problem{display:flex;flex-direction:column;align-items:center;gap:var(--space-sm);width:100%}.demo-math-equation{display:flex;align-items:center;gap:6px;font-size:1.1rem;font-weight:700}.demo-math-num{color:var(--color-text)}.demo-math-op{color:var(--color-primary)}.demo-math-eq{color:var(--color-text-muted)}.demo-math-answer{color:var(--color-success);opacity:0;transition:opacity 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14px;box-shadow:var(--shadow-sm);text-align:left;width:100%;max-width:220px}.demo-news-headline{font-size:.8rem;font-weight:700;color:var(--color-text);margin-bottom:6px;line-height:1.3}.demo-news-summary{font-size:.65rem;color:var(--color-text-secondary);line-height:1.5}.demo-news-discuss{background:#fff;border-radius:var(--radius-md);padding:12px 14px;box-shadow:var(--shadow-sm);text-align:center;width:100%;max-width:220px}.demo-news-discuss-label{font-size:.6rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:#fff;background:var(--color-primary);padding:2px 8px;border-radius:var(--radius-full);display:inline-block;margin-bottom:8px}.demo-news-discuss-q{font-size:.75rem;font-weight:600;color:var(--color-text);line-height:1.4}.demo-discuss-bubbles{display:flex;justify-content:center;gap:8px;margin-top:8px}.demo-discuss-bubble{font-size:1rem;animation:float 1.5s ease infinite}.demo-discuss-bubble:nth-child(2){animation-delay:.3s}.demo-discuss-bubble:nth-child(3){animation-delay:.6s}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-4px)}}@media (max-width: 1024px){.landing-pillars-3x2 .pillar-flip-container{grid-column:span 1}.landing-pillars-3x2 .pillar-flip-container:nth-child(4),.landing-pillars-3x2 .pillar-flip-container:nth-child(5){grid-column:span 1}}@media (max-width: 768px){.pillar-flip-container{grid-column:span 1!important;perspective:none;min-height:240px}.pillar-flip-card{transform:none!important;transition:none!important}.pillar-flip-container.is-hovered .pillar-flip-card{transform:none!important}.pillar-flip-back{display:none!important}.pillar-flip-hover-zone{display:none}.pillar-flip-front{min-height:220px;pointer-events:auto!important;position:relative}.pillar-flip-container:hover .pillar-flip-card{transform:none!important}}.settings-dropdown{position:relative}.settings-trigger{display:flex;align-items:center;justify-content:center;background:none;border:none;cursor:pointer;padding:6px;border-radius:var(--radius-md);transition:background .2s,color .2s;color:#fff;opacity:.85}.settings-trigger:hover{background:#ffffff26;opacity:1}.settings-menu{position:absolute;top:100%;right:0;margin-top:var(--space-xs);background:#fff;border-radius:var(--radius-lg);box-shadow:0 4px 24px #0000001f,0 1px 4px #00000014;min-width:200px;z-index:1000;overflow:hidden;animation:settingsSlideIn .15s ease-out;padding:var(--space-xs) 0}@keyframes settingsSlideIn{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.settings-section-label{padding:var(--space-sm) var(--space-md) var(--space-xs);font-size:.7rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-muted)}.settings-lang-options{display:flex;flex-direction:column}.settings-lang-btn{display:flex;align-items:center;gap:var(--space-sm);width:100%;padding:var(--space-sm) var(--space-md);border:none;background:none;cursor:pointer;font-size:.875rem;color:var(--color-text);text-align:left;transition:background .15s}.settings-lang-btn:hover{background:var(--color-bg-hover)}.settings-lang-btn.active{background:#f0f4f8;font-weight:600}.settings-lang-flag{font-size:1.1rem;line-height:1}.settings-lang-label{flex:1}.settings-check{margin-left:auto;color:var(--color-text-secondary);font-size:.8rem;font-weight:600}.settings-divider{height:1px;background:var(--color-border, #e5e7eb);margin:var(--space-xs) 0}.settings-item{display:flex;align-items:center;gap:var(--space-sm);width:100%;padding:var(--space-sm) var(--space-md);border:none;background:none;cursor:pointer;font-size:.875rem;color:var(--color-text);text-align:left;transition:background .15s}.settings-item:hover{background:var(--color-bg-hover)}.settings-item-icon{font-size:1rem;width:20px;text-align:center;line-height:1}.settings-item-label{flex:1}@media (max-width: 640px){.settings-menu{min-width:180px}}.student-detail-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0009;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:1000;padding:var(--space-lg)}.student-detail-modal{background:var(--color-surface);border-radius:var(--radius-xl);width:100%;max-width:800px;max-height:90vh;display:flex;flex-direction:column;box-shadow:0 25px 50px -12px #00000040;animation:modal-in .3s ease-out}@keyframes modal-in{0%{opacity:0;transform:scale(.95) translateY(20px)}to{opacity:1;transform:scale(1) translateY(0)}}.student-detail-modal .modal-header{display:flex;align-items:center;justify-content:space-between;padding:var(--space-lg) var(--space-xl);border-bottom:1px solid var(--color-border)}.student-detail-modal .student-info{display:flex;align-items:center;gap:var(--space-md)}.student-detail-modal .student-avatar{width:3rem;height:3rem;border-radius:var(--radius-full);background:linear-gradient(135deg,var(--color-primary),var(--color-play));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1.25rem}.student-detail-modal .student-info h2{margin:0;font-size:1.25rem}.student-detail-modal .activity-count{margin:0;font-size:.875rem;color:var(--color-text-muted)}.student-detail-modal .close-btn{width:2.5rem;height:2.5rem;border-radius:var(--radius-full);border:none;background:var(--color-bg);color:var(--color-text-muted);font-size:1.25rem;cursor:pointer;transition:all .15s ease}.student-detail-modal .close-btn:hover{background:var(--color-border);color:var(--color-text)}.student-detail-modal .filter-tabs{display:flex;gap:var(--space-xs);padding:var(--space-md) var(--space-xl);border-bottom:1px solid var(--color-border);overflow-x:auto}.student-detail-modal .filter-tab{padding:var(--space-xs) var(--space-md);border:none;border-radius:var(--radius-full);background:var(--color-bg);color:var(--color-text-secondary);font-size:.8125rem;font-weight:500;cursor:pointer;white-space:nowrap;transition:all .15s ease}.student-detail-modal .filter-tab:hover{background:var(--color-border)}.student-detail-modal .filter-tab.active{background:var(--color-primary);color:#fff}.student-detail-modal .modal-content{flex:1;overflow-y:auto;padding:var(--space-lg) var(--space-xl)}.student-detail-modal .loading-state,.student-detail-modal .empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:var(--space-2xl);color:var(--color-text-muted)}.student-detail-modal .date-group{margin-bottom:var(--space-xl)}.student-detail-modal .date-header{font-size:.8125rem;font-weight:600;color:var(--color-text-muted);text-transform:capitalize;margin-bottom:var(--space-md);padding-bottom:var(--space-xs);border-bottom:1px solid var(--color-border)}.student-detail-modal .type-group{margin-bottom:var(--space-xl)}.student-detail-modal .type-header{display:flex;align-items:center;gap:var(--space-sm);font-size:1rem;font-weight:600;color:var(--color-text);margin-bottom:var(--space-md);padding-bottom:var(--space-sm);border-bottom:2px solid var(--color-primary)}.student-detail-modal .type-icon{font-size:1.25rem}.student-detail-modal .type-label{flex:1}.student-detail-modal .type-count{font-size:.75rem;font-weight:500;color:var(--color-text-muted);background:var(--color-bg);padding:var(--space-xs) var(--space-sm);border-radius:var(--radius-full)}.student-detail-modal .exercise-group{margin-bottom:var(--space-lg);background:var(--color-bg);border-radius:var(--radius-md);overflow:hidden}.student-detail-modal .exercise-header{display:flex;align-items:center;justify-content:space-between;padding:var(--space-sm) var(--space-md);background:var(--color-surface);border-bottom:1px solid var(--color-border)}.student-detail-modal .exercise-title{font-weight:600;font-size:.9375rem;color:var(--color-text)}.student-detail-modal .exercise-stats{display:flex;align-items:center;gap:var(--space-md)}.student-detail-modal .best-score{font-size:.75rem;font-weight:600;padding:2px var(--space-xs);border-radius:var(--radius-sm)}.student-detail-modal .best-score.excellent{background:#ecfdf5;color:var(--color-success)}.student-detail-modal .best-score.good{background:#fffbeb;color:var(--color-warning)}.student-detail-modal .best-score.needs-work{background:#fef2f2;color:var(--color-danger)}.student-detail-modal .attempt-count{font-size:.75rem;color:var(--color-text-muted)}.student-detail-modal .exercise-group .activity-card{margin:0;border-radius:0;border-bottom:1px solid var(--color-border)}.student-detail-modal .exercise-group .activity-card:last-child{border-bottom:none}.student-detail-modal .exercise-group .activity-card.in-progress{border:none;border-bottom:1px solid var(--color-border);background:linear-gradient(135deg,#6366f108,#6366f10f)}.student-detail-modal .activity-card{background:var(--color-bg);border-radius:var(--radius-md);margin-bottom:var(--space-sm);overflow:hidden}.student-detail-modal .activity-card.in-progress{border:2px dashed var(--color-primary);background:linear-gradient(135deg,#6366f108,#6366f10f)}.student-detail-modal .in-progress-badge{display:inline-block;margin-left:var(--space-xs);padding:2px var(--space-xs);background:var(--color-primary);color:#fff;font-size:.625rem;font-weight:700;border-radius:var(--radius-sm);text-transform:uppercase;vertical-align:middle}.student-detail-modal .activity-header{display:flex;align-items:center;justify-content:space-between;padding:var(--space-md);cursor:pointer;transition:background .15s ease}.student-detail-modal .activity-header:hover{background:var(--color-border)}.student-detail-modal .activity-info{display:flex;align-items:center;gap:var(--space-sm)}.student-detail-modal .activity-icon{font-size:1.5rem}.student-detail-modal .activity-title{font-weight:600;font-size:.9375rem}.student-detail-modal .activity-meta{font-size:.75rem;color:var(--color-text-muted)}.student-detail-modal .activity-score{display:flex;align-items:center;gap:var(--space-sm)}.student-detail-modal .score-bar{width:4rem;height:4px;background:var(--color-border);border-radius:var(--radius-full);overflow:hidden}.student-detail-modal .score-fill{height:100%;border-radius:var(--radius-full);transition:width .3s ease}.student-detail-modal .score-text{font-weight:700;font-size:.875rem;min-width:2.5rem;text-align:right}.student-detail-modal .score-text.excellent{color:var(--color-success)}.student-detail-modal .score-text.good{color:var(--color-warning)}.student-detail-modal .score-text.needs-work{color:var(--color-danger)}.student-detail-modal .score-text.in-progress{color:var(--color-primary)}.student-detail-modal .score-fill.in-progress{background:var(--color-primary)}.student-detail-modal .expand-icon{color:var(--color-text-muted);font-size:.75rem}.student-detail-modal .activity-details{padding:var(--space-md);padding-top:0;border-top:1px solid var(--color-border)}.student-detail-modal .score-summary{font-size:.875rem;color:var(--color-text-secondary);margin-bottom:var(--space-md);padding:var(--space-sm);background:var(--color-surface);border-radius:var(--radius-sm);text-align:center}.student-detail-modal .activity-results{display:flex;flex-direction:column;gap:var(--space-sm)}.student-detail-modal .result-item{background:var(--color-surface);border-radius:var(--radius-md);padding:var(--space-md);border-left:3px solid}.student-detail-modal .result-item.correct{border-left-color:var(--color-success)}.student-detail-modal .result-item.incorrect{border-left-color:var(--color-danger)}.student-detail-modal .result-header{display:flex;align-items:flex-start;gap:var(--space-sm);margin-bottom:var(--space-sm)}.student-detail-modal .result-icon{font-weight:700;font-size:1rem}.result-item.correct .result-icon{color:var(--color-success)}.result-item.incorrect .result-icon{color:var(--color-danger)}.student-detail-modal .result-question{font-weight:500;font-size:.9375rem;line-height:1.4}.student-detail-modal .result-details{padding-left:1.5rem}.student-detail-modal .result-row{display:flex;gap:var(--space-sm);font-size:.8125rem;margin-bottom:var(--space-xs)}.student-detail-modal .result-label{color:var(--color-text-muted)}.student-detail-modal .result-value{font-weight:500}.student-detail-modal .result-value.correct{color:var(--color-success)}.student-detail-modal .result-value.incorrect{color:var(--color-danger)}.student-detail-modal .result-feedback{display:flex;align-items:flex-start;gap:var(--space-xs);font-size:.8125rem;color:var(--color-text-secondary);margin-top:var(--space-sm);padding:var(--space-sm);background:var(--color-bg);border-radius:var(--radius-sm)}.student-detail-modal .feedback-icon{flex-shrink:0}.student-detail-modal .result-steps{margin-top:var(--space-md);padding:var(--space-md);background:#f8fafc;border-radius:var(--radius-md);border:1px solid var(--color-border)}.student-detail-modal .steps-label{font-size:.75rem;font-weight:600;color:var(--color-text-muted);margin-bottom:var(--space-xs)}.student-detail-modal .steps-content{font-size:.875rem;white-space:pre-wrap;line-height:1.5}.student-detail-modal 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var(--color-border)}.student-detail-modal .drawing-feedback.correct{background:#ecfdf5;color:#059669}.student-detail-modal .drawing-feedback.needs-work{background:#fffbeb;color:#b45309}.student-detail-modal .result-options{display:flex;flex-direction:column;gap:var(--space-xs)}.student-detail-modal .result-option{display:flex;align-items:center;gap:var(--space-sm);padding:var(--space-xs) var(--space-sm);border-radius:var(--radius-sm);font-size:.8125rem;background:var(--color-bg)}.student-detail-modal .result-option.correct-answer{background:#ecfdf5;color:#059669;font-weight:500}.student-detail-modal .result-option.wrong-answer{background:#fef2f2;color:#dc2626}.student-detail-modal .option-marker{color:var(--color-danger);font-weight:700}.student-detail-modal .correct-marker{margin-left:auto;color:var(--color-success)}.student-detail-modal .word-results{gap:var(--space-lg)}.student-detail-modal .word-section 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.modal-content{padding:var(--space-md)}.student-detail-modal .activity-header{flex-direction:column;align-items:flex-start;gap:var(--space-sm)}.student-detail-modal .activity-score{width:100%;justify-content:space-between}.student-detail-modal .score-bar{flex:1}}.card-menu{position:relative}.card-menu-backdrop{position:fixed;top:0;left:0;right:0;bottom:0;z-index:99998}.card-menu-trigger{display:flex;align-items:center;justify-content:center;background:none;border:none;cursor:pointer;padding:6px;border-radius:var(--radius-md);transition:background .2s;color:var(--color-text-muted)}.card-menu-trigger:hover{background:var(--color-bg-hover);color:var(--color-text)}.card-menu-dropdown{position:fixed;background:#fff;border-radius:var(--radius-lg);box-shadow:0 4px 24px #00000026,0 2px 8px #0000001a;min-width:200px;z-index:99999;overflow:visible;animation:cardMenuSlideIn .15s ease-out;padding:var(--space-xs) 0}@keyframes cardMenuSlideIn{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.card-menu-item-wrapper{position:relative}.card-menu-item{display:flex;align-items:center;gap:var(--space-sm);width:100%;padding:var(--space-sm) var(--space-md);border:none;background:none;cursor:pointer;font-size:.875rem;color:var(--color-text);text-align:left;transition:background .15s}.card-menu-item:hover{background:var(--color-bg-hover)}.card-menu-item:disabled{opacity:.5;cursor:not-allowed}.card-menu-item.danger{color:var(--color-danger)}.card-menu-item.danger:hover{background:#ef444414}.card-menu-item.has-submenu{justify-content:space-between}.card-menu-item-icon{display:flex;align-items:center;justify-content:center;width:20px;flex-shrink:0}.card-menu-item-label{flex:1}.card-menu-submenu{position:absolute;top:0;right:100%;margin-right:4px;background:#fff;border-radius:var(--radius-lg);box-shadow:0 4px 24px #00000026,0 2px 8px #0000001a;min-width:200px;z-index:10000;padding:var(--space-xs) 0;animation:cardMenuSlideIn .15s ease-out}@media (max-width: 640px){.card-menu-backdrop{background:#0006;animation:fadeIn .2s ease-out}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.card-menu-dropdown{top:auto!important;bottom:0;left:0;right:0!important;margin:0;border-radius:var(--radius-lg) var(--radius-lg) 0 0;min-width:100%;max-height:70vh;overflow-y:auto;animation:cardMenuSlideUp .2s ease-out}@keyframes cardMenuSlideUp{0%{opacity:0;transform:translateY(100%)}to{opacity:1;transform:translateY(0)}}.card-menu-submenu{position:static;margin:0;box-shadow:none;border-radius:0;min-width:100%;padding-left:var(--space-lg);background:var(--color-bg);border-top:1px solid var(--color-border)}.card-menu-item{padding:var(--space-md) var(--space-lg);font-size:1rem}.card-menu-item.has-submenu .card-menu-chevron{transition:transform .2s}.card-menu-item.has-submenu.expanded .card-menu-chevron{transform:rotate(90deg)}}.class-activities{margin-top:var(--space-sm);border-top:1px solid var(--color-border);padding-top:var(--space-sm)}.class-activities-toggle{display:flex;align-items:center;gap:var(--space-xs);background:none;border:none;cursor:pointer;font-size:.8125rem;font-weight:600;color:var(--color-text-muted);padding:var(--space-xs) 0;transition:color .15s}.class-activities-toggle:hover{color:var(--color-text)}.class-activities-chevron{margin-left:auto;transition:transform .2s}.class-activities-content{padding:var(--space-sm) 0;animation:classActivitiesSlideIn .15s ease-out}@keyframes classActivitiesSlideIn{0%{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.class-activities-desc{font-size:.75rem;color:var(--color-text-muted);margin:0 0 var(--space-sm) 0}.class-activities-options{display:flex;gap:var(--space-sm)}.class-activities-option{flex:1;display:flex;flex-direction:column;align-items:flex-start;gap:var(--space-xs);padding:var(--space-sm);background:#fff;border:1px solid var(--color-border);border-radius:var(--radius-md);cursor:pointer;transition:all .15s;text-align:left}.class-activities-option:hover{background:var(--color-surface);border-color:var(--color-primary)}.class-activities-option-header{display:flex;align-items:center;gap:var(--space-xs);font-weight:600;font-size:.875rem;color:var(--color-text)}.class-activities-option-desc{font-size:.75rem;color:var(--color-text-muted);margin:0;line-height:1.4}@media (max-width: 480px){.class-activities-options{flex-direction:column}}.progress-summary-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-md);margin-bottom:var(--space-lg)}.progress-summary-card{text-align:center;padding:var(--space-lg)}.progress-summary-value{font-size:2rem;font-weight:700;font-family:var(--font-display);color:var(--color-primary)}.progress-summary-label{font-size:.8125rem;color:var(--color-text-muted);margin-top:var(--space-xs)}.progress-filters{padding:var(--space-md) var(--space-lg);margin-bottom:var(--space-md)}.progress-filter-row{display:flex;gap:var(--space-lg);align-items:flex-end;flex-wrap:wrap}.progress-filter-group{display:flex;flex-direction:column;gap:var(--space-xs)}.progress-filter-group label{font-size:.75rem;font-weight:600;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.04em}.progress-filter-input{padding:.375rem .75rem;border:1.5px solid var(--color-border);border-radius:var(--radius-md);font-size:.875rem;font-family:var(--font-sans);background:var(--color-surface);color:var(--color-text);min-width:160px}.progress-filter-input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 2px var(--color-primary-bg)}.progress-checkbox-label{display:flex;align-items:center;gap:.375rem;font-size:.8125rem;color:var(--color-text-secondary);cursor:pointer;white-space:nowrap;align-self:flex-end;padding-bottom:.25rem}.progress-checkbox-label input[type=checkbox]{accent-color:var(--color-primary);width:1rem;height:1rem;cursor:pointer}.progress-type-tabs{display:flex;gap:.25rem;flex-wrap:wrap}.progress-type-tab{display:flex;align-items:center;gap:.25rem;padding:.3125rem .625rem;border:1.5px solid var(--color-border);border-radius:var(--radius-full);background:var(--color-surface);font-size:.75rem;font-family:var(--font-sans);cursor:pointer;color:var(--color-text-secondary);transition:all .15s 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var(--space-md);text-align:left;font-weight:600;font-size:.75rem;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.04em;border-right:2px solid var(--color-border)}.progress-grid-col-header{min-width:80px;max-width:120px;padding:var(--space-sm) var(--space-xs);text-align:center;font-weight:500;font-size:.6875rem;color:var(--color-text-secondary);vertical-align:bottom;line-height:1.3}.progress-col-type{display:block;margin-bottom:.125rem;opacity:.7}.progress-col-title{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.progress-grid-row-header{position:sticky;left:0;z-index:2;background:var(--color-surface);min-width:180px;padding:var(--space-xs) var(--space-md);border-right:2px solid var(--color-border)}.progress-student-link{display:flex;align-items:center;gap:var(--space-sm);border:none;background:none;padding:0;cursor:pointer;font-family:var(--font-sans);color:var(--color-text);font-size:.8125rem;width:100%;text-align:left}.progress-student-link:hover .progress-grid-name{color:var(--color-primary);text-decoration:underline}.progress-grid-avatar{width:1.75rem;height:1.75rem;border-radius:var(--radius-full);background:linear-gradient(135deg,var(--color-primary),var(--color-play));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:.75rem;flex-shrink:0}.progress-grid-name{font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:color .15s ease}.progress-row-avg{font-size:.6875rem;font-weight:700;margin-left:auto;flex-shrink:0;padding-left:var(--space-sm)}.progress-delete-student-btn{display:none;align-items:center;justify-content:center;width:1.5rem;height:1.5rem;border:none;background:none;color:var(--color-text-muted);cursor:pointer;border-radius:var(--radius-sm);flex-shrink:0;margin-left:var(--space-xs);transition:all .15s ease}.progress-delete-student-btn:hover{color:var(--color-danger);background:var(--color-danger-bg, rgba(239, 68, 68, .1))}.progress-grid-row-header:hover .progress-delete-student-btn{display:flex}.progress-grid-cell{text-align:center;padding:var(--space-xs);cursor:pointer}.progress-grid-cell.no-data{cursor:default}.progress-grid-cell:not(.no-data):hover .progress-cell-dot{transform:scale(1.12);box-shadow:0 1px 4px #0000001f}.progress-cell-dot{display:inline-flex;align-items:center;justify-content:center;width:100%;min-width:48px;height:32px;border-radius:var(--radius-sm);border:2px solid;transition:transform .1s ease,box-shadow .1s ease}.progress-cell-label{font-size:.6875rem;font-weight:600;color:var(--color-text)}.progress-grid tbody tr:nth-child(2n) td{background-color:#00000004}.progress-grid tbody tr:nth-child(2n) .progress-grid-row-header{background-color:color-mix(in srgb,var(--color-surface) 97%,var(--color-text) 3%)}.progress-grid tbody tr:hover td{background-color:rgba(var(--color-primary-rgb, 99, 102, 241),.04)}.progress-grid tbody tr:hover .progress-grid-row-header{background-color:color-mix(in srgb,var(--color-surface) 94%,var(--color-primary) 6%)}@media (max-width: 768px){.progress-summary-cards{grid-template-columns:repeat(3,1fr);gap:var(--space-sm)}.progress-summary-card{padding:var(--space-md)}.progress-summary-value{font-size:1.5rem}.progress-summary-label{font-size:.6875rem}.progress-filter-row{flex-direction:column;gap:var(--space-md)}.progress-filter-input{min-width:0;width:100%}.progress-type-tabs{flex-wrap:wrap}.progress-grid-corner,.progress-grid-row-header{min-width:140px}.progress-legend{flex-wrap:wrap;gap:var(--space-sm)}}@media (max-width: 480px){.progress-summary-cards{grid-template-columns:1fr}.progress-summary-card{display:flex;justify-content:space-between;align-items:center;text-align:left}.progress-summary-value{font-size:1.25rem;order:2}.progress-summary-label{margin-top:0;order:1}}.join-page{min-height:100vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#fff5f5,#fff,#f0f9ff);padding:var(--space-lg)}.join-card{background:#fff;border-radius:var(--radius-xl);box-shadow:0 4px 32px #00000014;padding:var(--space-2xl) var(--space-xl);max-width:400px;width:100%;text-align:center}.join-logo{margin-bottom:var(--space-lg)}.join-title{font-size:1.5rem;font-weight:700;margin:0 0 var(--space-xs);color:var(--color-text)}.join-subtitle{color:var(--color-text-secondary);font-size:.9375rem;margin:0 0 var(--space-xl)}.join-code-inputs{display:flex;gap:var(--space-sm);justify-content:center;margin-bottom:var(--space-lg)}.join-code-input{width:52px;height:64px;text-align:center;font-size:1.75rem;font-weight:700;font-family:JetBrains Mono,SF Mono,Monaco,monospace;letter-spacing:0;border:2px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-bg);color:var(--color-text);transition:border-color .15s,box-shadow .15s;text-transform:uppercase}.join-code-input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px #ff6b6b26}.join-code-input.error{border-color:var(--color-error)}.join-code-input:disabled{opacity:.6;cursor:not-allowed}.join-error{color:var(--color-error);font-size:.875rem;margin:calc(-1 * var(--space-sm)) 0 var(--space-md)}.join-submit{width:100%;padding:var(--space-md);font-size:1rem;display:flex;align-items:center;justify-content:center;gap:var(--space-sm)}.join-hint{margin-top:var(--space-lg);font-size:.8125rem;color:var(--color-text-muted)}@media (max-width: 480px){.join-code-input{width:44px;height:56px;font-size:1.5rem}.join-code-inputs{gap:var(--space-xs)}}.flashcard-scene{perspective:1000px;min-height:260px;cursor:pointer}.flashcard-card{width:100%;height:260px;position:relative;transform-style:preserve-3d;transition:transform .6s cubic-bezier(.4,.2,.2,1)}.flashcard-card.is-flipped{transform:rotateY(180deg)}.flashcard-face{position:absolute;width:100%;height:100%;backface-visibility:hidden;-webkit-backface-visibility:hidden;display:flex;flex-direction:column;align-items:center;justify-content:center;background:var(--color-surface);border:3px solid var(--color-input);border-radius:var(--radius-xl);padding:var(--space-2xl);box-shadow:var(--shadow-md);box-sizing:border-box}.flashcard-front{z-index:2;transform:rotateY(0)}.flashcard-back{transform:rotateY(180deg);background:var(--color-surface);border-color:var(--color-primary)}.flashcard-hint{color:var(--color-text-secondary);font-size:.875rem;margin-top:var(--space-lg)}.flashcard-original{font-size:.875rem;color:var(--color-text-secondary);margin-bottom:var(--space-sm)}.flashcard-translation{color:var(--color-primary)!important}.flashcard-sentence{margin-top:var(--space-lg);font-size:.9375rem;color:var(--color-text);font-style:italic;max-width:400px;text-align:center}.flashcard-scene:hover .flashcard-card:not(.is-flipped){transform:rotateY(8deg) translateZ(10px)}.flashcard-scene:hover .flashcard-card.is-flipped{transform:rotateY(172deg) translateZ(10px)}.wordlist-game{max-width:600px;margin:0 auto}.wordlist-controls{display:flex;flex-direction:column;gap:var(--space-md);margin-bottom:var(--space-lg)}.hide-mode-buttons{display:flex;gap:var(--space-xs);justify-content:center;flex-wrap:wrap}.hide-mode-btn{padding:var(--space-sm) var(--space-md);border:1px solid var(--color-border);border-radius:var(--radius-md);background:#fff;cursor:pointer;font-size:.875rem;transition:all .2s}.hide-mode-btn:hover{background:var(--color-bg-hover)}.hide-mode-btn.active{background:var(--color-primary);color:#fff;border-color:var(--color-primary)}.reveal-buttons{display:flex;gap:var(--space-sm);justify-content:center}.wordlist-table{border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow:hidden}.wordlist-header{display:grid;grid-template-columns:1fr 1fr;background:var(--color-primary);color:#fff;font-weight:600}.wordlist-header .wordlist-cell{padding:var(--space-md);font-size:.875rem}.wordlist-row{display:grid;grid-template-columns:1fr 1fr;border-bottom:1px solid var(--color-border)}.wordlist-row:last-child{border-bottom:none}.wordlist-row:nth-child(2n){background:var(--color-bg)}.wordlist-row.clickable{cursor:pointer;transition:background .15s}.wordlist-row.clickable:hover{background:var(--color-bg-hover)}.wordlist-cell{padding:var(--space-md);font-size:1rem}.wordlist-cell.hidden-text{color:var(--color-text-muted);font-style:italic;-webkit-user-select:none;user-select:none}.wordlist-done{display:flex;justify-content:center;margin-top:var(--space-xl)}.avatar-builder-v2{display:flex;flex-direction:column;gap:1.5rem;padding:1.5rem;background:linear-gradient(145deg,#fff,#fdf8f5);border-radius:1.5rem;border:2px solid #f0e6e0;box-shadow:0 4px 24px #af51a214,0 1px 3px #0000000a}.avb-preview-section{display:flex;flex-direction:column;align-items:center;gap:1rem;position:relative;padding:1rem 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.drawing-done-btn{padding:6px 14px;font-size:.875rem;white-space:nowrap;flex-shrink:0;margin-left:auto}}.lesson-breadcrumb{display:flex;align-items:center;flex-wrap:wrap;gap:var(--space-xs);margin-bottom:var(--space-lg);font-size:.875rem}.breadcrumb-item{display:flex;align-items:center;gap:var(--space-xs)}.breadcrumb-separator{color:var(--color-text-muted);flex-shrink:0}.breadcrumb-link{background:none;border:none;padding:var(--space-xs) var(--space-sm);margin:calc(-1 * var(--space-xs)) calc(-1 * var(--space-sm));color:var(--color-primary);cursor:pointer;border-radius:var(--radius-sm);transition:background-color .15s,color .15s;font-size:inherit;font-family:inherit}.breadcrumb-link:hover{background-color:var(--color-primary-light);color:var(--color-primary-dark)}.breadcrumb-link:focus-visible{outline:2px solid 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0;display:flex;align-items:center;gap:var(--space-sm)}.sharing-unique-card p{font-size:1.0625rem;line-height:1.8;color:var(--color-text-secondary);margin:0 0 var(--space-md) 0}.sharing-unique-card p:last-child{margin-bottom:0}.sharing-faq-section{padding:var(--space-2xl) 0;background:var(--color-surface)}.sharing-faq-section h2{font-family:var(--font-display);font-size:1.75rem;font-weight:700;color:var(--color-text);text-align:center;margin:0 0 var(--space-xl) 0}.sharing-faq-item{background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--space-lg);margin-bottom:var(--space-md)}.sharing-faq-item h3{font-size:1.0625rem;font-weight:700;color:var(--color-text);margin:0 0 var(--space-sm) 0}.sharing-faq-item p{font-size:.9375rem;line-height:1.7;color:var(--color-text-secondary);margin:0}.sharing-cta-section{padding:var(--space-2xl) 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768px){.sharing-hero{padding:120px 0 60px}.sharing-hero h1{font-size:2rem}.sharing-hero p{font-size:1.0625rem}.sharing-body-section,.sharing-steps-section,.sharing-faq-section,.sharing-cta-section,.sharing-animation-section,.sharing-unique-section{padding:var(--space-xl) 0}.sharing-animation-card,.sharing-unique-card{padding:var(--space-lg)}.sharing-flow{gap:var(--space-sm)}.sharing-flow-avatar{width:40px;height:40px;font-size:1.25rem}.sharing-flow-node.origin .sharing-flow-avatar{width:48px;height:48px}.sharing-flow-arrow svg{width:32px}.sharing-stats{gap:var(--space-lg)}.sharing-stat-value{font-size:1.5rem}}@media (max-width: 480px){.sharing-hero h1{font-size:1.5rem}.sharing-body-section h2,.sharing-steps-section h2,.sharing-faq-section h2{font-size:1.375rem}.sharing-cta-card{padding:var(--space-xl)}.sharing-cta-card h2{font-size:1.375rem}.sharing-cta-buttons{flex-direction:column}.sharing-cta-buttons 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#f59e0b33}.match-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:var(--space-sm);margin-top:var(--space-lg)}.match-tile{padding:var(--space-md);border:3px solid var(--color-border);border-radius:var(--radius-lg);text-align:center;font-weight:600;cursor:pointer;transition:all .2s;background:var(--color-surface);min-height:60px;display:flex;align-items:center;justify-content:center}.match-tile:hover{border-color:var(--color-input);background:#65d9ba14}.match-tile.selected{border-color:var(--color-play);background:#af51a214;color:var(--color-play)}.match-tile.matched{border-color:var(--color-success);background:var(--color-success-light);color:#2d8a6e;pointer-events:none}.match-tile.wrong{border-color:var(--color-primary);background:var(--color-danger-light);animation:shake .4s ease}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-5px)}75%{transform:translate(5px)}}.quiz-options{display:grid;gap:var(--space-sm);margin-top:var(--space-lg)}.quiz-option{padding:var(--space-md) var(--space-lg);border:3px solid var(--color-border);border-radius:var(--radius-lg);text-align:left;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s;background:var(--color-surface)}.quiz-option:hover{border-color:var(--color-input);background:#65d9ba14}.quiz-option.selected{border-color:var(--color-play);background:#af51a21a}.quiz-option.correct{border-color:var(--color-success);background:var(--color-success-light);color:#2d8a6e}.quiz-option.incorrect{border-color:var(--color-danger);background:var(--color-danger-light);color:#c44}.score-display{text-align:center;padding:var(--space-2xl)}.score-number{font-family:var(--font-display);font-size:4rem;font-weight:600;background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.score-label{color:var(--color-text-secondary);font-size:1.125rem;margin-top:var(--space-sm)}.game-modes{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:var(--space-lg);margin-top:var(--space-xl)}.game-mode-card{background:var(--color-surface);border:3px solid var(--color-border);border-radius:var(--radius-xl);padding:var(--space-xl);text-align:center;cursor:pointer;transition:all .2s}.game-mode-card:hover{border-color:var(--color-play);box-shadow:var(--shadow-md);transform:translateY(-4px)}.game-mode-icon{font-size:2.5rem;margin-bottom:var(--space-md)}.game-mode-title{font-size:1.0625rem;font-weight:600;margin-bottom:var(--space-xs)}.game-mode-desc{font-size:.8125rem;color:var(--color-text-secondary)}.teacher-container{width:80%;max-width:1400px;margin:0 auto}.magic-link-section{display:flex;gap:var(--space-xl);align-items:flex-start}.magic-link-qr{padding:var(--space-md);background:#fff;border-radius:var(--radius-md);border:1px solid var(--color-border);flex-shrink:0}.magic-link-copy{flex:1;min-width:0}.content-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:var(--space-lg);gap:var(--space-md)}.content-header-actions{display:flex;gap:var(--space-sm)}.class-goal-card{border-left:4px solid var(--color-primary)}.class-goal-student-card{border-left:4px solid var(--color-primary);background:linear-gradient(135deg,#ff6b6b0a,#ffc8570a)}.class-goal-progress-track{width:100%;height:12px;background:var(--color-bg);border-radius:6px;overflow:hidden;border:1px solid var(--color-border)}.class-goal-progress-fill{height:100%;border-radius:6px;background:linear-gradient(90deg,var(--color-primary),#ff8a65);transition:width .6s ease-out;min-width:0}.class-goal-progress-fill.class-goal-reached{background:linear-gradient(90deg,var(--color-success),#4ade80);animation:goal-pulse 2s ease-in-out infinite}@keyframes goal-pulse{0%,to{opacity:1}50%{opacity:.8}}.create-content-grid{display:flex;flex-wrap:wrap;gap:var(--space-lg);justify-content:center}.create-content-card{cursor:pointer;padding:var(--space-lg) var(--space-md);text-align:center;border:2px solid var(--color-border);width:150px;flex-shrink:0;display:flex;flex-direction:column;align-items:center}.create-content-card h4{min-height:2.5em;display:flex;align-items:center}.create-content-card p{font-size:.75rem!important;line-height:1.4;min-height:3.5em}.qr-modal{position:relative;background:#fff;padding:var(--space-2xl);border-radius:var(--radius-xl);display:flex;flex-direction:column;align-items:center;max-width:calc(100vw - 40px);max-height:calc(100vh - 80px)}.qr-modal-close{position:absolute;top:var(--space-md);right:var(--space-md);background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--color-text-muted);padding:var(--space-xs);line-height:1;transition:color .15s ease}.qr-modal-close:hover{color:var(--color-text)}@media (max-width: 768px){.form-row{grid-template-columns:1fr}.page-header{flex-direction:column;align-items:flex-start;gap:var(--space-md)}.game-word{font-size:1.5rem}.score-number{font-size:3rem}.grid-2,.grid-3{grid-template-columns:1fr}.game-modes{grid-template-columns:repeat(2,1fr);gap:var(--space-sm)}.game-mode-card{padding:var(--space-md)}.game-mode-icon{font-size:1.75rem;margin-bottom:var(--space-sm)}.game-mode-title{font-size:.9375rem}.game-mode-desc{font-size:.75rem;display:none}.container{padding:0 var(--space-md)}.page-content{padding-top:var(--space-xl);padding-bottom:var(--space-xl)}.card{padding:var(--space-lg)}.page-title{font-size:1.5rem}.navbar-brand{font-size:1.125rem}.navbar-actions{gap:var(--space-xs)}.navbar-actions>span{display:none}.scramble-letters{gap:var(--space-xs)}.scramble-tile{width:40px;height:40px;font-size:1rem}.scramble-slot{width:32px;height:40px;font-size:1rem}.teacher-container{width:100%;max-width:100%;min-width:0}.navbar-inner{width:100%;max-width:100%}.magic-link-section{flex-direction:column;align-items:center;gap:var(--space-lg)}.magic-link-qr{order:-1}.magic-link-copy{width:100%}.content-header{flex-direction:column;align-items:stretch}.content-header-actions{flex-direction:column}.content-header-actions .btn{width:100%;justify-content:center}.create-content-grid{flex-direction:column;align-items:center;gap:var(--space-md)}.create-content-card{padding:var(--space-md);width:100%;max-width:320px;flex-direction:row;flex-wrap:wrap;gap:var(--space-sm) var(--space-md);text-align:left}.create-content-card h4{min-height:auto;flex:1}.create-content-card p{min-height:auto;width:100%;margin-top:calc(-1 * var(--space-xs))}.create-content-card div:first-child{font-size:2rem!important;margin-bottom:0!important}.copy-field{flex-direction:column;gap:var(--space-sm)}.copy-field code{font-size:.75rem;word-break:break-all}.copy-field button{width:100%;justify-content:center}.modal{margin:var(--space-md);max-height:calc(100vh - var(--space-xl));overflow-y:auto}.modal-actions{flex-direction:column-reverse;gap:var(--space-sm)}.modal-actions button{width:100%;justify-content:center}.card .btn-ghost.btn-sm{padding:var(--space-xs) var(--space-sm);font-size:.75rem}.card>div[style*="display: flex"][style*=gap]{flex-direction:column}.race-player-list,.race-player-chip-avatar{flex-wrap:wrap}.race-track-container{overflow-x:auto;margin:0 calc(-1 * var(--space-md));padding:0 var(--space-md)}.race-track{min-width:400px}.progress-table{font-size:.8125rem}.progress-table th,.progress-table td{padding:var(--space-sm)}.btn-lg{font-size:1rem;padding:var(--space-md) var(--space-lg)}}.scramble-answer{display:flex;justify-content:center;gap:var(--space-xs);margin:var(--space-lg) 0;min-height:52px;flex-wrap:wrap}.scramble-slot{width:36px;height:44px;border-bottom:2px solid var(--color-border);display:flex;align-items:center;justify-content:center;font-size:1.125rem;font-weight:600;font-family:var(--font-display);color:var(--color-text);transition:all .2s}.scramble-slot.filled{border-bottom-color:var(--color-primary);color:var(--color-primary)}.scramble-slot.correct{border-bottom-color:var(--color-success);color:#2d8a6e;background:var(--color-success-light);border-radius:var(--radius-sm)}.scramble-slot.incorrect{border-bottom-color:var(--color-danger);color:#c44;background:var(--color-danger-light);border-radius:var(--radius-sm)}.scramble-letters{display:flex;justify-content:center;gap:var(--space-sm);margin:var(--space-xl) 0 var(--space-lg);flex-wrap:wrap}.scramble-tile{width:48px;height:48px;border:3px solid var(--color-border);border-radius:var(--radius-lg);background:var(--color-surface);font-size:1.25rem;font-weight:600;font-family:var(--font-display);color:var(--color-text);cursor:pointer;transition:all .2s;display:flex;align-items:center;justify-content:center}.scramble-tile:hover:not(.used):not(:disabled){border-color:var(--color-play);background:#af51a214;color:var(--color-play);transform:translateY(-3px);box-shadow:var(--shadow-sm)}.scramble-tile.used{opacity:.2;transform:scale(.9);pointer-events:none}.crossword-game{max-width:100%;margin:0 auto}.crossword-progress{text-align:center;margin-bottom:var(--space-lg)}.crossword-progress-text{font-size:.875rem;color:var(--color-text-secondary);font-weight:500}.crossword-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:var(--space-xl);align-items:start}@media (max-width: 1200px){.crossword-layout{grid-template-columns:1fr}}.crossword-grid-container{background:var(--color-surface);border-radius:var(--radius-lg);padding:var(--space-lg);padding-top:calc(var(--space-lg) + 50px);box-shadow:var(--shadow-sm);overflow:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;-ms-overflow-style:none;max-width:100%;position:relative}.crossword-grid-container::-webkit-scrollbar{display:none}.crossword-grid-wrapper{position:relative;display:inline-block;margin-top:0}.crossword-tooltip{position:absolute;background:#1e293b;color:#fff;padding:8px 12px;border-radius:8px;border:1px solid rgba(255,255,255,.15);font-size:14px;display:inline-flex;align-items:center;gap:6px;box-shadow:0 4px 12px #0003;white-space:nowrap;z-index:100;pointer-events:none}.crossword-tooltip:after{content:"";position:absolute;top:100%;left:12px;border:6px solid transparent;border-top-color:#1e293b}.crossword-tooltip-number{font-weight:700;color:#818cf8}.crossword-tooltip-direction{font-weight:600;color:#94a3b8;text-transform:uppercase;font-size:11px;letter-spacing:.05em}.crossword-tooltip-clue{font-weight:500}.crossword-grid{display:grid;gap:0;background:var(--color-text);border:2px solid var(--color-text);width:fit-content;margin:0 auto}.crossword-cell{width:40px;height:40px;background:var(--color-surface);position:relative;display:flex;align-items:center;justify-content:center;border:1px solid var(--color-border)}.crossword-cell.empty{background:var(--color-text);border-color:var(--color-text);cursor:grab}.crossword-cell.highlighted{background:#e0e7ff}.crossword-cell.selected{background:#c7d2fe}.crossword-cell.correct{background:var(--color-success-light)}.crossword-number{position:absolute;top:2px;left:3px;font-size:12px;font-weight:700;color:var(--color-text-secondary);line-height:1}.crossword-input{width:100%;height:100%;border:none;background:transparent;text-align:center;font-size:20px;font-weight:700;font-family:var(--font-display);color:#1e293b;text-transform:uppercase;padding:0;outline:none;cursor:pointer}.crossword-input:focus{outline:none}.crossword-clues{display:flex;flex-direction:column;gap:var(--space-lg)}@media (max-width: 1200px){.crossword-clues{display:grid;grid-template-columns:1fr 1fr}}@media (max-width: 600px){.crossword-clues{grid-template-columns:1fr}}.crossword-clue-section{background:var(--color-surface);border-radius:var(--radius-lg);padding:var(--space-md);box-shadow:var(--shadow-sm)}.crossword-clue-title{font-size:1rem;font-weight:600;color:var(--color-primary);margin-bottom:var(--space-sm);text-transform:uppercase;letter-spacing:.05em}.crossword-clue-list{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:var(--space-xs)}.crossword-clue{display:flex;gap:var(--space-xs);font-size:.9375rem;color:var(--color-text);cursor:pointer;padding:var(--space-xs);border-radius:var(--radius-sm);transition:background .15s}.crossword-clue:hover{background:var(--color-bg)}.crossword-clue.completed{color:var(--color-text-muted);text-decoration:line-through}.crossword-clue-number{font-weight:600;color:var(--color-text-secondary);min-width:20px}.crossword-clue-text{flex:1}@media (max-width: 768px){.crossword-grid-container{justify-content:flex-start;max-height:60vh}.crossword-cell{width:32px;height:32px}.crossword-input{font-size:16px}.crossword-number{font-size:10px}}.speed-intro{text-align:center;padding:var(--space-xl)}.speed-timer-display{font-family:var(--font-display);font-weight:600;background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:var(--space-md)}.speed-rules{display:flex;flex-direction:column;gap:var(--space-sm);margin:var(--space-lg) auto 0;max-width:260px}.speed-rule{font-size:.875rem;color:var(--color-text-secondary);padding:var(--space-xs) var(--space-md);background:var(--color-bg);border-radius:var(--radius-md)}.speed-rule strong{color:var(--color-primary)}.speed-timer-bar{height:6px;background:var(--color-border);border-radius:var(--radius-full);overflow:hidden;margin-bottom:var(--space-lg)}.speed-timer-fill{height:100%;border-radius:var(--radius-full)}.speed-stats{display:flex;justify-content:center;gap:var(--space-2xl);margin-bottom:var(--space-lg)}.speed-stat{display:flex;flex-direction:column;align-items:center}.speed-stat-value{font-family:var(--font-display);font-size:1.5rem;font-weight:700;color:var(--color-text)}.speed-stat-label{font-size:.75rem;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.05em}.speed-card{transition:border-color .3s ease}.speed-flash-correct{border-color:var(--color-success)!important}.speed-flash-skip{border-color:var(--color-warning)!important}.speed-streak-banner{margin-top:var(--space-md);padding:var(--space-xs) var(--space-md);background:linear-gradient(135deg,var(--color-secondary),var(--color-accent));color:var(--color-text);font-weight:700;font-size:.875rem;border-radius:var(--radius-full);display:inline-block;animation:streak-bounce .5s ease}@keyframes streak-bounce{0%{transform:scale(.8);opacity:0}50%{transform:scale(1.1)}to{transform:scale(1);opacity:1}}.racer-wrapper{max-width:480px;margin:0 auto;user-select:none;-webkit-user-select:none;display:flex;flex-direction:column;height:calc(100vh - 80px);overflow:hidden}.racer-intro{text-align:center;padding:var(--space-xl)}.racer-splash{position:relative;overflow:hidden;border-radius:var(--radius-lg)}.racer-splash-video{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;object-fit:cover;z-index:0}.racer-splash-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:#0000008c;z-index:1}.racer-intro{position:relative;z-index:2;text-align:center;padding:var(--space-xl);color:#fff}.racer-intro h3{color:#fff}.racer-intro .racer-rules{max-width:300px}.racer-intro .racer-rule{background:#ffffff26;color:#ffffffe6;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.racer-rules{display:flex;flex-direction:column;gap:var(--space-sm);margin:var(--space-lg) auto 0;max-width:300px}.racer-rule{font-size:.875rem;color:var(--color-text-secondary);padding:var(--space-xs) var(--space-md);background:var(--color-bg);border-radius:var(--radius-md)}.racer-hud{display:flex;justify-content:space-between;align-items:center;padding:var(--space-xs) var(--space-md);background:var(--color-surface);border-radius:var(--radius-lg);border:1px solid var(--color-border);margin-bottom:var(--space-xs);flex-shrink:0}.racer-hud-item{display:flex;flex-direction:column;align-items:center;gap:2px}.racer-hud-label{font-size:.6875rem;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.05em}.racer-hud-value{font-family:var(--font-display);font-size:1.25rem;font-weight:700;color:var(--color-text)}.racer-lives{display:flex;gap:2px;font-size:1rem}.racer-heart{transition:transform .3s,opacity .3s}.racer-heart-active{animation:racer-heart-beat 1.2s ease infinite}.racer-heart-lost{opacity:.4;transform:scale(.8)}@keyframes racer-heart-beat{0%,to{transform:scale(1)}50%{transform:scale(1.15)}}.racer-streak-hot{color:#f59e0b!important;animation:racer-streak-pulse .5s ease infinite alternate}@keyframes racer-streak-pulse{0%{transform:scale(1)}to{transform:scale(1.15)}}.racer-prompt{text-align:center;padding:var(--space-xs) var(--space-md);background:linear-gradient(135deg,#6366f1,#8b5cf6);border-radius:var(--radius-lg);margin-bottom:var(--space-xs);color:#fff;flex-shrink:0}.racer-prompt-label{display:block;font-size:.75rem;opacity:.8;margin-bottom:2px}.racer-prompt-word{font-family:var(--font-display);font-size:1.25rem;font-weight:700;display:block;animation:racer-word-in .3s ease}@keyframes racer-word-in{0%{transform:scale(.8);opacity:0}to{transform:scale(1);opacity:1}}.racer-road{position:relative;background:linear-gradient(180deg,#374151,#1f2937);border-radius:var(--radius-lg);overflow:hidden;border:3px solid #4b5563;touch-action:none;flex:1;min-height:0;max-height:600px}.racer-road:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:repeating-linear-gradient(0deg,transparent,transparent 40px,rgba(255,255,255,.02) 40px,rgba(255,255,255,.02) 42px);pointer-events:none;animation:racer-road-scroll .8s linear infinite}@keyframes racer-road-scroll{0%{transform:translateY(0)}to{transform:translateY(42px)}}.racer-shake{animation:racer-shake-anim .3s ease}@keyframes racer-shake-anim{0%,to{transform:translate(0)}20%{transform:translate(-6px)}40%{transform:translate(6px)}60%{transform:translate(-4px)}80%{transform:translate(4px)}}.racer-road-lines{position:absolute;top:0;right:0;bottom:0;left:0;pointer-events:none}.racer-lane-divider{position:absolute;top:0;bottom:0;width:3px;transform:translate(-50%);display:flex;flex-direction:column;gap:16px;padding-top:8px;animation:racer-dash-scroll .6s linear infinite}@keyframes racer-dash-scroll{0%{transform:translate(-50%) translateY(0)}to{transform:translate(-50%) translateY(48px)}}.racer-dash{width:3px;height:28px;background:#ffffff59;border-radius:2px;flex-shrink:0}.racer-lane-tap{position:absolute;top:0;bottom:0;z-index:2;cursor:pointer}.racer-word{position:absolute;z-index:5;background:#fffffff2;color:#1f2937;padding:4px 8px;border-radius:var(--radius-md);font-weight:600;font-size:.8125rem;white-space:normal;word-break:normal;overflow-wrap:normal;text-align:center;max-width:calc(33.33% - 12px);box-shadow:0 4px 12px #0000004d;animation:racer-word-spawn .3s ease;pointer-events:none;border:2px solid rgba(99,102,241,.4);line-height:1.2}@keyframes racer-word-spawn{0%{transform:translate(-50%) scale(.5);opacity:0}to{transform:translate(-50%) scale(1);opacity:1}}.racer-car{position:absolute;z-index:10;transition:left .15s ease,transform .15s ease;filter:drop-shadow(0 4px 8px rgba(0,0,0,.4))}.racer-car-accelerating{filter:drop-shadow(0 4px 12px rgba(239,68,68,.6))}.racer-car-accelerating .racer-car-img{filter:brightness(1.1)}.racer-car-body{line-height:1;transition:transform .15s ease}.racer-car-img{width:56px;height:auto;display:block}.racer-car-boost .racer-car-body{animation:racer-boost .4s ease}@keyframes racer-boost{0%{transform:scale(1)}30%{transform:scale(1.3)}to{transform:scale(1)}}.racer-car-hit .racer-car-body{animation:racer-hit .3s ease}@keyframes racer-hit{0%,to{transform:rotate(0)}25%{transform:rotate(-10deg)}75%{transform:rotate(10deg)}}.racer-car-flames{position:absolute;bottom:-8px;left:50%;transform:translate(-50%);font-size:1.25rem;animation:racer-flames .2s ease infinite alternate}@keyframes racer-flames{0%{transform:translate(-50%) scale(1);opacity:.8}to{transform:translate(-50%) scale(1.2);opacity:1}}.racer-car-sparks{position:absolute;bottom:-6px;left:50%;transform:translate(-50%);font-size:1rem;animation:racer-sparks .3s ease infinite alternate}@keyframes racer-sparks{0%{opacity:.6;transform:translate(-50%) translateY(0)}to{opacity:1;transform:translate(-50%) translateY(-4px)}}.racer-particle{position:absolute;z-index:15;font-size:.875rem;pointer-events:none;animation:racer-particle-fly .6s ease forwards}@keyframes racer-particle-fly{0%{transform:scale(1) translateY(0);opacity:1}to{transform:scale(0) translateY(-60px);opacity:0}}.racer-particle-star{animation:racer-star-fly .6s ease forwards}@keyframes racer-star-fly{0%{transform:scale(0) rotate(0);opacity:1}50%{transform:scale(1.5) rotate(180deg);opacity:1}to{transform:scale(0) rotate(360deg) translateY(-40px);opacity:0}}.racer-particle-fire{animation:racer-fire-fly .5s ease forwards}@keyframes racer-fire-fly{0%{transform:scale(1);opacity:1}to{transform:scale(2) translateY(-30px);opacity:0}}.racer-feedback{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);z-index:20;font-family:var(--font-display);font-size:1.5rem;font-weight:700;padding:var(--space-sm) var(--space-xl);border-radius:var(--radius-full);animation:racer-feedback-pop .7s ease forwards;pointer-events:none;white-space:nowrap}.racer-feedback-correct{background:linear-gradient(135deg,#10b981,#34d399);color:#fff;box-shadow:0 0 30px #10b98180}.racer-feedback-wrong,.racer-feedback-miss{background:linear-gradient(135deg,#ef4444,#f87171);color:#fff;box-shadow:0 0 30px #ef444480}@keyframes racer-feedback-pop{0%{transform:translate(-50%,-50%) scale(.5);opacity:0}20%{transform:translate(-50%,-50%) scale(1.2);opacity:1}80%{transform:translate(-50%,-50%) scale(1);opacity:1}to{transform:translate(-50%,-60%) scale(.8);opacity:0}}.racer-mobile-controls{display:flex;align-items:center;justify-content:center;gap:var(--space-lg);padding:var(--space-xs) 0;flex-shrink:0}.racer-road-boost:before{animation-duration:.25s}.racer-road-boost .racer-lane-divider{animation-duration:.2s}.racer-control-btn{width:56px;height:56px;border-radius:50%;border:2px solid var(--color-border);background:var(--color-surface);font-size:1.5rem;font-weight:700;color:var(--color-text);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .15s ease;box-shadow:0 2px 8px #0000001a;-webkit-user-select:none;user-select:none}.racer-boost-btn{background:linear-gradient(135deg,#fbbf24,#f59e0b);border-color:#f59e0b;color:#fff}.racer-boost-btn-active{background:linear-gradient(135deg,#ef4444,#dc2626);border-color:#dc2626;transform:scale(.9);box-shadow:0 0 16px #ef444480}.racer-control-btn:active{transform:scale(.9);background:var(--color-primary);color:#fff;border-color:var(--color-primary)}.racer-boost-btn:active{background:linear-gradient(135deg,#ef4444,#dc2626);border-color:#dc2626}@media (min-width: 768px){.racer-mobile-controls .racer-control-btn{display:flex}}.race-lobby{max-width:600px;margin:0 auto}.race-lobby-card{padding:var(--space-2xl)}.race-lobby-players{margin-bottom:var(--space-xl)}.race-player-list{display:flex;flex-wrap:wrap;gap:var(--space-sm)}.race-player-chip{display:flex;align-items:center;gap:var(--space-sm);padding:var(--space-xs) var(--space-md) var(--space-xs) var(--space-xs);border:2px solid var(--color-border);border-radius:var(--radius-full);font-size:.875rem;font-weight:500;background:var(--color-surface);animation:chip-appear .3s ease}@keyframes chip-appear{0%{transform:scale(.8);opacity:0}to{transform:scale(1);opacity:1}}.race-car-mini{width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff}.race-lobby-waiting{display:flex;align-items:center;justify-content:center;gap:var(--space-sm);color:var(--color-text-muted);font-size:.875rem;padding:var(--space-md) 0}.race-track-container{background:var(--color-surface);border:2px solid var(--color-border);border-radius:var(--radius-xl);padding:var(--space-lg) var(--space-xl);box-shadow:var(--shadow-md);overflow:hidden}.race-track{position:relative;min-height:60px}.race-finish-line{position:absolute;right:2%;top:0;bottom:0;width:4px;background:repeating-linear-gradient(to bottom,#1e293b,#1e293b 8px,#fff 8px,#fff 16px);border-radius:2px;z-index:1}.race-finish-line:before{content:attr(data-goal);position:absolute;top:-22px;right:-14px;font-size:.625rem;font-weight:700;color:var(--color-text-muted);letter-spacing:.05em}.race-lane{position:relative;height:48px;border-bottom:1px dashed var(--color-border);margin-bottom:2px}.race-lane:last-child{border-bottom:none;margin-bottom:0}.race-car{position:absolute;top:50%;transform:translateY(-50%);left:0;display:flex;align-items:center;gap:var(--space-xs);padding:4px 10px 4px 6px;border-radius:var(--radius-full);color:#fff;font-size:.75rem;font-weight:600;white-space:nowrap;box-shadow:0 2px 6px #0003;z-index:2}.race-car-mine{box-shadow:0 0 0 3px #fffc,0 2px 8px #0000004d}.race-car-name{max-width:80px;overflow:hidden;text-overflow:ellipsis}.race-car-avatar{padding:2px 8px 2px 2px;background:#fffffff2!important;border:2px solid var(--color-border)}.race-car-avatar svg{flex-shrink:0;border-radius:50%}.race-score-bar{text-align:center;font-size:.875rem;color:var(--color-text-secondary);padding:var(--space-md) 0}.race-question-card{max-width:600px;margin:0 auto}.race-results{display:flex;flex-direction:column;gap:var(--space-sm);margin-top:var(--space-lg)}.race-result-row{display:flex;align-items:center;gap:var(--space-md);padding:var(--space-md) var(--space-lg);border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface)}.race-result-mine{border-color:var(--color-primary);background:var(--color-primary-bg)}.race-result-place{font-family:var(--font-display);font-weight:700;font-size:1.125rem;color:var(--color-primary);min-width:36px}.race-result-name{flex:1;font-weight:500}.race-result-score{font-size:.875rem;color:var(--color-text-secondary)}.race-winner-banner{text-align:center;padding:var(--space-lg) var(--space-xl);background:linear-gradient(135deg,#fef3c7,#fde68a);border:2px solid #f59e0b;border-radius:var(--radius-lg);margin-bottom:var(--space-lg)}.race-trophy{display:block;font-size:.875rem;font-weight:600;color:#92400e;text-transform:uppercase;letter-spacing:.1em;margin-bottom:var(--space-xs)}.race-winner-name{font-family:var(--font-display);font-size:1.75rem;font-weight:700;color:#78350f}.race-finished{max-width:600px;margin:0 auto}@media (max-width: 768px){.race-car-name{max-width:50px;font-size:.625rem}.race-track-container{padding:var(--space-md) var(--space-sm)}}.tetris-board-container{background:#0a0a0a;border:3px solid #333;border-radius:var(--radius-lg);padding:4px;box-shadow:0 0 40px #00000080,inset 0 0 20px #00000080;overflow:hidden}.tetris-board-container.tetris-shake{animation:tetris-board-shake .3s ease-out}@keyframes tetris-board-shake{0%,to{transform:translate(0)}20%{transform:translate(-3px) translateY(1px)}40%{transform:translate(3px) translateY(-1px)}60%{transform:translate(-2px)}80%{transform:translate(2px)}}.tetris-board{display:grid;gap:0;width:fit-content;border-left:1px solid #222;border-top:1px solid #222}.tetris-cell{background:#1a1a2e;border-right:1px solid #222;border-bottom:1px solid #222;box-sizing:border-box;transition:background-color .05s ease}.tetris-cell-filled{outline:1px solid rgba(255,255,255,.15);outline-offset:-1px;box-shadow:inset 0 0 4px #ffffff1a}.tetris-cell-active{outline:1px solid rgba(255,255,255,.3);outline-offset:-1px;box-shadow:inset 0 0 8px #fff3,0 0 4px #ffffff1a;animation:tetris-piece-glow 1s ease-in-out infinite alternate}@keyframes tetris-piece-glow{0%{filter:brightness(1)}to{filter:brightness(1.2)}}.tetris-stat{display:flex;flex-direction:column;align-items:center;gap:2px}.tetris-stat-label{font-size:.6875rem;font-weight:600;color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.05em}.tetris-stat-value{font-family:var(--font-display);font-size:1.5rem;font-weight:700;color:var(--color-text)}.tetris-player-stats{display:flex;flex-direction:column;gap:var(--space-sm)}.tetris-player-stat{display:flex;align-items:center;gap:var(--space-sm);padding:var(--space-xs) var(--space-md);border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface)}.tetris-player-name{flex:1;font-weight:500;font-size:.875rem}.tetris-player-pieces{font-size:.75rem;color:var(--color-text-secondary)}.tetris-student-playing{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;flex-direction:column;background:#0a0a0a;z-index:100;padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left)}.tetris-student-playing .tetris-student-stats{display:flex;justify-content:center;align-items:center;gap:var(--space-2xl);padding:var(--space-xs) var(--space-md);background:#111;flex-shrink:0}.tetris-next-piece{display:flex;flex-direction:column;align-items:center;gap:2px}.tetris-next-grid{background:#1a1a2e;border:1px solid #333;border-radius:4px;padding:4px}.tetris-next-cell{width:12px;height:12px;background:transparent}.tetris-next-cell-filled{border-radius:1px;box-shadow:inset 0 0 3px #ffffff26}.tetris-student-playing .tetris-board-container{flex:1;min-height:0;display:flex;align-items:flex-end;justify-content:center;border:none;border-radius:0;box-shadow:none;padding:2px;overflow:hidden}.tetris-student-board-container .tetris-board{width:fit-content}.tetris-student-playing .tetris-controls{flex-shrink:0;padding:var(--space-sm) var(--space-md);padding-bottom:max(var(--space-sm),env(safe-area-inset-bottom));background:#111}.tetris-student-playing .tetris-controls-row{display:flex;gap:var(--space-sm);justify-content:center}.tetris-student-playing .tetris-control-btn{flex:1;max-width:80px;height:56px;font-size:1.5rem}.tetris-student-playing .tetris-control-drop{flex:1;max-width:80px;height:56px;font-size:1.25rem}.tetris-student-playing .tetris-control-rotate{flex:1;max-width:80px;height:56px;font-size:1.5rem}.tetris-cell-other{opacity:.5}.tetris-cell-clearing{animation:tetris-cell-explode .5s ease-out forwards;position:relative;z-index:10;overflow:visible}.tetris-cell-clearing:before{content:"";position:absolute;top:-2px;right:-2px;bottom:-2px;left:-2px;background:inherit;border-radius:2px;animation:tetris-glow-burst .5s ease-out forwards;pointer-events:none}.tetris-cell-clearing:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:radial-gradient(circle at 20% 20%,currentColor 2px,transparent 2px),radial-gradient(circle at 80% 20%,currentColor 2px,transparent 2px),radial-gradient(circle at 20% 80%,currentColor 2px,transparent 2px),radial-gradient(circle at 80% 80%,currentColor 2px,transparent 2px),radial-gradient(circle at 50% 10%,currentColor 2px,transparent 2px),radial-gradient(circle at 50% 90%,currentColor 2px,transparent 2px),radial-gradient(circle at 10% 50%,currentColor 2px,transparent 2px),radial-gradient(circle at 90% 50%,currentColor 2px,transparent 2px);animation:tetris-particles-explode .5s ease-out forwards;pointer-events:none;z-index:20}@keyframes tetris-cell-explode{0%{filter:brightness(1);transform:scale(1);opacity:1}15%{filter:brightness(3) saturate(1.5);transform:scale(1.3);background-color:#fff!important}30%{filter:brightness(2.5);transform:scale(1.1)}60%{filter:brightness(1.5);transform:scale(.8) rotate(5deg);opacity:.8}to{filter:brightness(0);transform:scale(0) rotate(15deg);opacity:0}}@keyframes tetris-glow-burst{0%{opacity:1;transform:scale(1);filter:blur(0px) brightness(2);box-shadow:0 0 #fffc}30%{opacity:1;transform:scale(2);filter:blur(4px) brightness(3);box-shadow:0 0 20px 10px #fff9}to{opacity:0;transform:scale(3);filter:blur(8px) brightness(0);box-shadow:0 0 40px 20px transparent}}@keyframes tetris-particles-explode{0%{opacity:1;transform:scale(1);filter:brightness(3)}20%{opacity:1;transform:scale(2);filter:brightness(2)}to{opacity:0;transform:scale(6);filter:brightness(.5)}}.tetris-game-over-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:#000000d9;display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:100;animation:tetris-game-over-fade-in .5s ease-out;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.tetris-game-over-title{font-family:var(--font-display);font-size:clamp(2.5rem,8vw,5rem);font-weight:900;text-transform:uppercase;letter-spacing:.1em;background:linear-gradient(180deg,#f44,red,#a00);-webkit-background-clip:text;background-clip:text;color:transparent;text-shadow:0 0 40px rgba(255,0,0,.5);animation:tetris-game-over-pulse 1.5s ease-in-out infinite;margin-bottom:var(--space-md)}.tetris-game-over-score{font-size:clamp(1.25rem,4vw,2rem);color:#fff;margin-bottom:var(--space-sm);animation:tetris-game-over-slide-up .6s ease-out .2s both}.tetris-game-over-lines{font-size:clamp(1rem,3vw,1.5rem);color:#ffffffb3;margin-bottom:var(--space-xl);animation:tetris-game-over-slide-up .6s ease-out .3s both}.tetris-game-over-blocks{display:flex;gap:8px;margin-bottom:var(--space-xl);animation:tetris-game-over-slide-up .6s ease-out .1s both}.tetris-game-over-block{width:clamp(20px,5vw,40px);height:clamp(20px,5vw,40px);border-radius:4px;animation:tetris-block-fall .8s ease-out both}.tetris-game-over-block:nth-child(1){background:#00f0f0;animation-delay:.1s}.tetris-game-over-block:nth-child(2){background:#f0f000;animation-delay:.15s}.tetris-game-over-block:nth-child(3){background:#a000f0;animation-delay:.2s}.tetris-game-over-block:nth-child(4){background:#00f000;animation-delay:.25s}.tetris-game-over-block:nth-child(5){background:#f00000;animation-delay:.3s}.tetris-game-over-block:nth-child(6){background:#0000f0;animation-delay:.35s}.tetris-game-over-block:nth-child(7){background:#f0a000;animation-delay:.4s}@keyframes tetris-game-over-fade-in{0%{opacity:0}to{opacity:1}}@keyframes tetris-game-over-pulse{0%,to{transform:scale(1);filter:brightness(1)}50%{transform:scale(1.05);filter:brightness(1.2)}}@keyframes tetris-game-over-slide-up{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}@keyframes tetris-block-fall{0%{opacity:0;transform:translateY(-100px) rotate(-20deg)}60%{opacity:1;transform:translateY(10px) rotate(5deg)}80%{transform:translateY(-5px) rotate(-2deg)}to{opacity:1;transform:translateY(0) rotate(0)}}.tetris-controls{display:flex;flex-direction:column;align-items:center;gap:var(--space-md)}.tetris-controls-row{display:flex;gap:var(--space-md);justify-content:center}.tetris-control-btn{width:72px;height:72px;border-radius:var(--radius-lg);border:2px solid var(--color-border);background:var(--color-surface);font-size:1.75rem;font-weight:700;color:var(--color-text);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .1s ease;user-select:none;-webkit-user-select:none;touch-action:manipulation}.tetris-control-btn:active:not(:disabled){transform:scale(.92);background:var(--color-primary);color:#fff;border-color:var(--color-primary)}.tetris-control-btn:disabled{opacity:.3;cursor:not-allowed}.tetris-control-drop{width:100%;max-width:240px;height:56px;font-size:1.25rem;gap:var(--space-xs);background:var(--color-primary-bg);border-color:var(--color-primary);color:var(--color-primary)}.tetris-control-drop:active:not(:disabled){background:var(--color-primary);color:#fff}.tetris-control-rotate{width:100%;max-width:240px;height:56px;font-size:1.5rem;background:#6366f114;border-color:#6366f1;color:#6366f1}.tetris-control-rotate:active:not(:disabled){background:#6366f1;color:#fff}@media (max-width: 768px){.tetris-board-container:not(.tetris-student-board-container){margin:0 calc(-1 * var(--space-md));border-radius:0;border-left:none;border-right:none}}.avatar-builder{display:flex;flex-direction:column;gap:var(--space-lg);padding:var(--space-lg);background:var(--color-surface);border-radius:var(--radius-xl);border:2px solid var(--color-border)}.avatar-preview-section{display:flex;flex-direction:column;align-items:center;gap:var(--space-md)}.avatar-preview-wrapper{position:relative;padding:var(--space-sm);background:linear-gradient(135deg,#ff6b6b1a,#ffc8571a);border-radius:50%;box-shadow:var(--shadow-md);animation:avatar-float 3s ease-in-out infinite}@keyframes avatar-float{0%,to{transform:translateY(0)}50%{transform:translateY(-6px)}}.avatar-preview-wrapper svg{display:block;border:3px solid white;box-shadow:var(--shadow-sm)}.avatar-randomize-btn{display:inline-flex;align-items:center;gap:var(--space-xs);padding:var(--space-sm) var(--space-md);background:linear-gradient(135deg,var(--color-secondary),var(--color-accent));border:none;border-radius:var(--radius-full);font-size:.8125rem;font-weight:700;color:var(--color-text);cursor:pointer;transition:all .2s ease;box-shadow:0 2px 8px #ffc85766}.avatar-randomize-btn:hover{transform:translateY(-2px) scale(1.05);box-shadow:0 4px 12px #ffc85780}.avatar-randomize-btn:active{transform:translateY(0) scale(.98)}.avatar-customizer{display:flex;flex-direction:column;gap:var(--space-md)}.avatar-category-tabs{display:flex;justify-content:center;gap:var(--space-xs);flex-wrap:wrap}.avatar-category-tab{width:44px;height:44px;display:flex;align-items:center;justify-content:center;border:2px solid var(--color-border);border-radius:var(--radius-lg);background:var(--color-surface);cursor:pointer;transition:all .2s ease}.avatar-category-tab:hover{border-color:var(--color-input);background:#65d9ba1a;transform:translateY(-2px)}.avatar-category-tab.active{border-color:var(--color-play);background:#af51a21a;box-shadow:0 0 0 3px #af51a233}.avatar-tab-icon{font-size:1.25rem}.avatar-options{display:flex;flex-direction:column;gap:var(--space-sm)}.avatar-options-label{font-size:.8125rem;font-weight:700;color:var(--color-text-secondary);text-align:center;text-transform:uppercase;letter-spacing:.05em}.avatar-options-grid{display:flex;flex-wrap:wrap;gap:var(--space-xs);justify-content:center}.avatar-option{min-width:40px;height:40px;padding:var(--space-xs) var(--space-sm);border:2px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-surface);cursor:pointer;transition:all .15s ease;font-size:.75rem;font-weight:600;color:var(--color-text)}.avatar-option:hover{border-color:var(--color-input);transform:scale(1.08)}.avatar-option.selected{border-color:var(--color-play);box-shadow:0 0 0 3px #af51a240;transform:scale(1.1)}.avatar-option[style*=background]{border-radius:50%;width:36px;height:36px;min-width:36px;padding:0;border-width:3px}.avatar-option[style*=background]:hover{transform:scale(1.15)}.avatar-option[style*=background].selected{transform:scale(1.2);border-color:#fff;box-shadow:0 0 0 3px var(--color-play),0 2px 8px #0003}.lobby-avatar-section{margin-top:var(--space-xl);padding-top:var(--space-xl);border-top:2px dashed var(--color-border)}.lobby-avatar-header{text-align:center;margin-bottom:var(--space-md)}.lobby-avatar-header h4{font-size:1rem;font-family:var(--font-display);color:var(--color-text);margin-bottom:var(--space-xs)}.lobby-avatar-header p{font-size:.8125rem;color:var(--color-text-muted)}.race-player-chip-avatar{display:flex;align-items:center;gap:var(--space-sm);padding:var(--space-xs) var(--space-md) var(--space-xs) var(--space-xs);border:2px solid var(--color-border);border-radius:var(--radius-full);font-size:.875rem;font-weight:500;background:var(--color-surface);animation:chip-appear .3s ease}.race-player-chip-avatar svg{flex-shrink:0}.landing-nav{position:fixed;top:0;left:0;right:0;z-index:100;padding:0 var(--space-lg);height:64px;display:flex;align-items:center;background:var(--color-primary);box-shadow:var(--shadow-md)}.landing-nav-inner{max-width:1100px;width:100%;margin:0 auto;display:flex;align-items:center;justify-content:space-between}.landing-nav-brand{font-family:var(--font-display);font-size:1.25rem;font-weight:600;color:#fff;display:flex;align-items:center;gap:.5rem}.landing-nav-actions{display:flex;align-items:center;gap:var(--space-sm)}.landing-hamburger{display:none;flex-direction:column;justify-content:center;gap:5px;width:36px;height:36px;background:transparent;border:none;cursor:pointer;padding:6px}.landing-hamburger span{display:block;width:100%;height:3px;background:#fff;border-radius:2px;transition:transform .2s ease,opacity .2s ease}.landing-mobile-menu{display:none;position:absolute;top:64px;left:0;right:0;background:var(--color-primary);padding:var(--space-md) var(--space-lg);flex-direction:column;gap:var(--space-sm);box-shadow:var(--shadow-lg)}.landing-mobile-menu .language-picker-select{background:#fffffff2;color:var(--color-text);border:2px solid rgba(255,255,255,.8);font-weight:600}.landing-mobile-menu .language-picker-select:hover,.landing-mobile-menu .language-picker-select:focus{background:#fff;border-color:#fff}.landing-mobile-menu .btn{width:100%;justify-content:center}.landing-btn-outline{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.5)}.landing-btn-outline:hover{background:#ffffff26;border-color:#fff;color:#fff}.landing-dropdown{position:relative}.landing-dropdown>button{display:flex;align-items:center;justify-content:center;padding:var(--space-sm)}.landing-dropdown-menu{position:absolute;top:calc(100% + 8px);right:0;background:linear-gradient(135deg,#e85555,#ff6b6b,#e89940 80%,#d99510);border-radius:var(--radius-lg);box-shadow:0 10px 40px #00000040;min-width:240px;z-index:100;overflow:hidden;animation:dropdownSlide .15s ease}@keyframes dropdownSlide{0%{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}.landing-dropdown-section{padding:var(--space-sm) 0;background:#0000001a}.landing-dropdown-label{padding:var(--space-xs) var(--space-md) var(--space-sm);font-size:.6875rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:#fffc}.landing-dropdown-item{display:flex;align-items:center;gap:var(--space-sm);padding:var(--space-sm) var(--space-md);color:#fff;text-decoration:none;font-size:.9375rem;font-weight:500;transition:all .15s}.landing-dropdown-item:hover{background:#ffffff26;color:#fff}.landing-dropdown-icon{display:flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:var(--radius-md);background:#fff3;color:#fff;flex-shrink:0}.landing-dropdown-item:hover .landing-dropdown-icon{background:#ffffff4d;color:#fff}.landing-dropdown-icon-maths,.landing-dropdown-icon-swedish{background:#ffffff40;color:#fff}.landing-dropdown-item:hover .landing-dropdown-icon-maths,.landing-dropdown-item:hover .landing-dropdown-icon-swedish{transform:scale(1.05);background:#ffffff59}.landing-dropdown-divider{height:1px;background:#fff3;margin:var(--space-xs) var(--space-md)}.landing-dropdown-language{padding:var(--space-sm) var(--space-md);display:flex;justify-content:center}.landing-dropdown-language .language-picker-select{background:#fffffff2;color:var(--color-text);border:2px solid 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80px}.landing-hero-title{font-family:var(--font-display);font-size:3.25rem;font-weight:700;color:#fff;line-height:1.15;margin-bottom:var(--space-lg);letter-spacing:-.02em;text-shadow:0 2px 8px rgba(0,0,0,.15),0 1px 2px rgba(0,0,0,.1)}.landing-highlight{position:relative;display:inline-block}.landing-highlight:after{content:"";position:absolute;left:-4px;right:-4px;bottom:2px;height:14px;background:#ffffff4d;border-radius:4px;z-index:-1}.landing-hero-subtitle{font-size:1.2rem;color:#fff;max-width:620px;margin:0 auto var(--space-xl);line-height:1.7;text-shadow:0 1px 4px rgba(0,0,0,.12)}.landing-hero-actions{display:flex;align-items:center;justify-content:center;gap:var(--space-md);margin-bottom:var(--space-2xl)}.landing-btn-ghost-hero{background:transparent;color:#ffffffe6;border:none;font-weight:600;text-decoration:none}.landing-btn-ghost-hero:hover{color:#fff;text-decoration:none}.landing-scroll-indicator{position:absolute;bottom:24px;left:50%;transform:translate(-50%);color:#fffc;animation:bounce 2s infinite;z-index:2;text-decoration:none}.landing-scroll-indicator:hover{color:#fff}@keyframes bounce{0%,20%,50%,80%,to{transform:translate(-50%) translateY(0)}40%{transform:translate(-50%) translateY(-10px)}60%{transform:translate(-50%) translateY(-5px)}}.landing-game-pills{display:flex;flex-wrap:wrap;justify-content:center;gap:var(--space-sm);max-width:720px;margin:0 auto}.landing-pill{display:inline-flex;align-items:center;gap:6px;padding:.375rem 1rem;background:#fff3;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border:1px solid 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.875rem;border-radius:var(--radius-full);margin-bottom:var(--space-md)}.landing-section-badge-gotd{color:var(--color-input-dark);background:#65d9ba26}.landing-section-badge-news{color:#d97706;background:#d9770626}.landing-section-badge-maths{color:#4f46e5;background:#4f46e51f}.landing-section-badge-reading{color:#16a34a;background:#16a34a1f}.landing-steps{display:flex;align-items:flex-start;justify-content:center;gap:var(--space-lg);margin-top:var(--space-2xl)}.landing-step{flex:1;max-width:280px;text-align:center}.landing-step-number{display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));color:#fff;font-family:var(--font-display);font-size:1.25rem;font-weight:700;border-radius:50%;margin-bottom:var(--space-md)}.landing-step h3{font-size:1.0625rem;margin-bottom:var(--space-xs)}.landing-step p{font-size:.9375rem;color:var(--color-text-secondary);line-height:1.6}.landing-step-arrow{font-size:1.5rem;color:var(--color-text-muted);padding-top:12px;flex-shrink:0}.landing-pillars{display:grid;grid-template-columns:1fr 1fr 1fr;gap:var(--space-xl);margin-top:var(--space-xl)}.landing-pillars-4{grid-template-columns:repeat(4,1fr);gap:var(--space-lg)}.landing-pillars-5{grid-template-columns:repeat(5,1fr);gap:var(--space-md)}.landing-pillars-3x2{grid-template-columns:repeat(6,1fr);gap:var(--space-lg);grid-auto-rows:1fr}.landing-pillars-3x2 .landing-pillar{grid-column:span 2}.landing-pillars-3x2 .landing-pillar-wide{grid-column:span 3}.landing-pillar{display:block;text-decoration:none;border-radius:var(--radius-xl);padding:var(--space-2xl);text-align:center;transition:transform .2s ease,box-shadow .2s ease}.landing-pillar:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);text-decoration:none}.landing-pillar-vocab{background:linear-gradient(160deg,#fff0f0,#ffe8e8);border:2px solid #ffc4c4}.landing-pillar-gotd{background:linear-gradient(160deg,#e0f8f0,#d0f0e4);border:2px solid #a8e6cf}.landing-pillar-news{background:linear-gradient(160deg,#fef3e0,#fde8c8);border:2px solid #fbbf24}.landing-pillar-maths{background:linear-gradient(160deg,#eff0ff,#e4e6ff);border:2px solid #b8bbf0}.landing-pillar-badge{display:inline-block;font-size:.625rem;font-weight:800;letter-spacing:.12em;color:var(--color-primary);background:#ff6b6b26;padding:.2rem .75rem;border-radius:var(--radius-full);margin-bottom:var(--space-md)}.landing-pillar-badge-gotd{color:#2d8a6e;background:#2d8a6e1f}.landing-pillar-badge-maths{color:#4f46e5;background:#4f46e51f}.landing-pillar-badge-news{color:#d97706;background:#d977061f}.landing-pillar-reading{background:linear-gradient(160deg,#f0fdf4,#dcfce7);border:2px solid #86efac}.landing-pillar-badge-reading{color:#16a34a;background:#16a34a1f}.landing-pillar h3{font-size:1.25rem;color:var(--color-text);margin-bottom:var(--space-sm)}.landing-pillar p{font-size:.9375rem;color:var(--color-text-secondary);line-height:1.6}.landing-pill-vocab{background:#ff6b6b26;border-color:#ff6b6b4d;color:var(--color-text)}.landing-feature-card-gotd{border-left-color:var(--color-input)}.landing-feature-card-gotd:nth-child(2){border-left-color:var(--color-success)}.landing-feature-card-gotd:nth-child(3){border-left-color:#2d8a6e}.landing-feature-card-maths{border-left-color:#6366f1}.landing-feature-card-maths:nth-child(2){border-left-color:#4f46e5}.landing-feature-card-maths:nth-child(3){border-left-color:#3730a3}.landing-feature-card-news{border-left-color:#fbbf24}.landing-feature-card-news:nth-child(2){border-left-color:#f59e0b}.landing-feature-card-news:nth-child(3){border-left-color:#d97706}.landing-feature-card-reading{border-left-color:#22c55e}.landing-feature-card-reading:nth-child(2){border-left-color:#16a34a}.landing-feature-card-reading:nth-child(3){border-left-color:#15803d}.landing-pill-maths{background:#4f46e51f;border-color:#4f46e540;color:var(--color-text)}.landing-tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:var(--space-md);max-width:900px;margin:0 auto}.landing-tool-card{display:flex;align-items:center;justify-content:center;padding:var(--space-lg) var(--space-md);background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-lg);text-align:center;transition:all .2s ease;min-height:80px}.landing-tool-card:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.landing-tool-name{font-size:.9375rem;font-weight:600;color:var(--color-text)}.landing-tool-card-vocab{border-color:#ff6b6b4d;background:#ff6b6b0d}.landing-tool-card-vocab:hover{border-color:var(--color-primary);background:#ff6b6b1a}.landing-tool-card-maths{border-color:#4f46e540;background:#4f46e50d}.landing-tool-card-maths:hover{border-color:#6366f1;background:#4f46e51a}.landing-gotd-flow{display:flex;align-items:flex-start;justify-content:center;gap:var(--space-md);margin-top:var(--space-2xl);flex-wrap:wrap}.landing-gotd-step{text-align:center;min-width:100px}.landing-gotd-step-num{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;background:linear-gradient(135deg,var(--color-input),var(--color-success));color:#fff;font-family:var(--font-display);font-size:1rem;font-weight:700;border-radius:50%;margin-bottom:var(--space-sm)}.landing-gotd-step strong{display:block;font-size:.9375rem;color:var(--color-text);margin-bottom:2px}.landing-gotd-step p{font-size:.8125rem;color:var(--color-text-muted);margin:0}.landing-gotd-arrow{font-size:1.25rem;color:var(--color-text-muted);flex-shrink:0}.landing-news-flow{display:flex;align-items:flex-start;justify-content:center;gap:var(--space-md);margin-top:var(--space-2xl);flex-wrap:wrap}.landing-news-step{text-align:center;min-width:100px}.landing-news-step-num{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;background:linear-gradient(135deg,#fbbf24,#f59e0b);color:#fff;font-family:var(--font-display);font-size:1rem;font-weight:700;border-radius:50%;margin-bottom:var(--space-sm)}.landing-news-step strong{display:block;font-size:.9375rem;color:var(--color-text);margin-bottom:2px}.landing-news-step p{font-size:.8125rem;color:var(--color-text-muted);margin:0}.landing-news-arrow{font-size:1.25rem;color:var(--color-text-muted);flex-shrink:0}.landing-features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-lg)}.landing-vocab-layout{display:grid;grid-template-columns:1fr 1.5fr;gap:var(--space-2xl);align-items:start}.landing-vocab-widget{display:flex;justify-content:center;align-items:flex-start;padding:var(--space-lg) 0}.landing-features-grid-narrow{grid-template-columns:1fr;gap:var(--space-md)}.landing-feature-card{background:var(--color-bg);border:2px solid var(--color-border);border-left:4px solid var(--color-primary);border-radius:var(--radius-xl);padding:var(--space-xl);transition:transform .2s ease,box-shadow .2s ease}.landing-feature-card:nth-child(2){border-left-color:var(--color-secondary)}.landing-feature-card:nth-child(3){border-left-color:var(--color-play)}.landing-feature-card:nth-child(4){border-left-color:var(--color-input)}.landing-feature-card:nth-child(5){border-left-color:var(--color-accent)}.landing-feature-card:nth-child(6){border-left-color:var(--color-success)}.landing-feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--color-input)}.landing-feature-card h3{font-size:1.0625rem;margin-bottom:var(--space-xs)}.landing-feature-card p{font-size:.875rem;color:var(--color-text-secondary);line-height:1.6}.landing-two-col{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-xl)}.landing-col-card{border-radius:var(--radius-xl);padding:var(--space-2xl);border:2px solid var(--color-border)}.landing-col-teacher{background:linear-gradient(160deg,#fff0f0,#ffe8e8);border-color:#ffc4c4}.landing-col-student{background:linear-gradient(160deg,#f0e0f5,#f5e6fa);border-color:#dbb8e8}.landing-col-badge{display:inline-block;font-size:.6875rem;font-weight:800;letter-spacing:.1em;color:var(--color-primary);background:#ff6b6b1f;padding:.2rem .75rem;border-radius:var(--radius-full);margin-bottom:var(--space-md)}.landing-col-badge-student{color:var(--color-play);background:#af51a21f}.landing-col-card h3{font-size:1.375rem;margin-bottom:var(--space-lg)}.landing-check-list{list-style:none;padding:0;display:flex;flex-direction:column;gap:var(--space-sm)}.landing-check-list li{position:relative;padding-left:1.75rem;font-size:.9375rem;color:var(--color-text-secondary);line-height:1.5}.landing-check-list li:before{content:"✓";position:absolute;left:0;font-weight:800;color:var(--color-success)}.landing-cta{background:linear-gradient(135deg,#ff6b6b,#ff8a8a 40%,#ffc857);padding:5rem 0;text-align:center}.landing-cta h2{font-family:var(--font-display);font-size:2rem;color:#fff;margin-top:var(--space-lg);margin-bottom:var(--space-sm)}.landing-cta p{color:#ffffffe6;font-size:1.0625rem;max-width:480px;margin:0 auto var(--space-xl)}.landing-cta-note{font-size:.8125rem;color:#ffffffb3;margin-top:var(--space-md)}.landing-hero-badge{display:inline-block;background:#fff3;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);color:#fff;font-size:.875rem;font-weight:600;padding:.5rem 1rem;border-radius:var(--radius-full);margin-bottom:var(--space-lg);border:1px solid rgba(255,255,255,.3)}.landing-hero-note{font-size:.8125rem;color:#ffffffb3;margin-top:var(--space-md)}.landing-pillar-icon{display:block;font-size:2.5rem;margin-bottom:var(--space-md)}.landing-section-dark{background:linear-gradient(180deg,#1a1a2e,#16213e);padding:5rem 0}.landing-section-title-light{color:#fff}.landing-section-subtitle-light{color:#ffffffb3}.landing-preview-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-xl);margin-top:var(--space-2xl)}.landing-preview-grid-4{grid-template-columns:repeat(4,1fr);gap:var(--space-lg)}.landing-preview-grid-5{grid-template-columns:repeat(5,1fr);gap:var(--space-md)}.landing-preview-card{text-align:center}.landing-preview-card h3{color:#fff;font-size:1.125rem;margin-top:var(--space-lg);margin-bottom:var(--space-xs)}.landing-preview-card p{color:#fff9;font-size:.875rem;line-height:1.5}.landing-preview-mockup{background:#fff;border-radius:var(--radius-xl);overflow:hidden;box-shadow:0 20px 60px #0000004d;transform:perspective(1000px) rotateX(2deg);transition:transform .3s ease}.landing-preview-mockup:hover{transform:perspective(1000px) rotateX(0) translateY(-4px)}.landing-mockup-header{background:#e5e5e5;padding:.75rem 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var(--color-border);border-radius:var(--radius-md);padding:.5rem;font-size:.8125rem;color:var(--color-text-secondary)}.landing-mockup-option-correct{background:#ecfdf5;border-color:#10b981;color:#059669;font-weight:600}.landing-mockup-problem{font-size:1.75rem;font-weight:700;color:#4f46e5;font-family:var(--font-mono)}.landing-mockup-input{display:flex;align-items:center;gap:var(--space-sm);font-size:1.25rem;color:var(--color-text)}.landing-mockup-answer{background:var(--color-surface);border:2px solid #4f46e5;border-radius:var(--radius-md);padding:.5rem 1rem;font-weight:700;color:#4f46e5}.landing-mockup-feedback{font-size:.875rem;font-weight:600}.landing-mockup-feedback-correct{color:#059669}.landing-preview-mockup-news .landing-mockup-content{background:linear-gradient(135deg,#fef3e0,#fde8c8)}.landing-mockup-news-badge{font-size:.75rem;font-weight:700;color:#d97706;background:#d9770626;padding:.25rem .75rem;border-radius:var(--radius-full)}.landing-mockup-news-headline{font-size:1rem;font-weight:700;color:var(--color-text);line-height:1.3}.landing-mockup-news-summary{font-size:.8125rem;color:var(--color-text-secondary);line-height:1.5}.landing-mockup-trivia-title{font-size:1rem;font-weight:600;color:var(--color-text)}.landing-mockup-trivia-fact{font-size:.875rem;color:var(--color-text-secondary);line-height:1.5;text-align:center;max-width:200px}.landing-mockup-trivia-wow{background:linear-gradient(135deg,gold,#fa0);color:#333;font-weight:800;padding:.5rem 1rem;border-radius:var(--radius-full);font-size:.875rem}.landing-preview-mockup-reading .landing-mockup-content{display:flex;flex-direction:column;gap:var(--space-sm);align-items:center}.landing-mockup-reading-text{font-size:.8125rem;color:var(--color-text-secondary);font-style:italic;text-align:center;line-height:1.4}.landing-mockup-reading-question{font-size:.875rem;font-weight:600;color:var(--color-text);text-align:center}.landing-mockup-reading-answer{background:#16a34a1a;border:1px solid rgba(22,163,74,.3);border-radius:var(--radius-md);padding:.375rem .75rem;font-size:.8125rem;color:#16a34a;font-weight:500}.landing-preview-cta{margin-top:var(--space-2xl);text-align:center}.landing-testimonials-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-xl);margin-top:var(--space-2xl)}.landing-testimonial-card{background:var(--color-surface);border:2px solid var(--color-border);border-radius:var(--radius-xl);padding:var(--space-xl);position:relative;transition:transform .2s ease,box-shadow .2s 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var(--space-sm)}.content-list-item-title{width:100%;font-size:.9375rem}.content-list-item-meta{font-size:.75rem}.content-list-item-actions{flex-shrink:0;justify-content:flex-end}}.card-premium-locked{opacity:.6;cursor:not-allowed!important;position:relative}.card-premium-locked:hover{transform:none!important;box-shadow:var(--shadow-sm)!important}.premium-badge{position:absolute;top:var(--space-sm);right:var(--space-sm);background:linear-gradient(135deg,#f59e0b,#d97706);color:#fff;font-size:.6875rem;font-weight:600;padding:2px 8px;border-radius:var(--radius-full);display:flex;align-items:center;gap:4px;z-index:1}.premium-tooltip{position:absolute;bottom:100%;left:50%;transform:translate(-50%);background:var(--color-text);color:#fff;padding:var(--space-sm) var(--space-md);border-radius:var(--radius-md);font-size:.8125rem;white-space:nowrap;opacity:0;visibility:hidden;transition:opacity .2s,visibility .2s;z-index:100;pointer-events:none;margin-bottom:var(--space-xs)}.premium-tooltip:after{content:"";position:absolute;top:100%;left:50%;transform:translate(-50%);border:6px solid transparent;border-top-color:var(--color-text)}.card-premium-locked:hover .premium-tooltip{opacity:1;visibility:visible}@keyframes unlockShake{0%,to{transform:rotate(0)}20%{transform:rotate(-15deg)}40%{transform:rotate(15deg)}60%{transform:rotate(-10deg)}80%{transform:rotate(10deg)}}@keyframes unlockPop{0%{transform:scale(1)}50%{transform:scale(1.15)}to{transform:scale(1)}}@keyframes unlockGlow{0%{box-shadow:0 0 #65d9ba00}50%{box-shadow:0 0 30px 10px #65d9ba99}to{box-shadow:0 0 #65d9ba00}}@keyframes badgeFadeOut{0%{opacity:1;transform:scale(1)}50%{opacity:1;transform:scale(1.3)}to{opacity:0;transform:scale(0) rotate(180deg)}}@keyframes checkmarkPop{0%{opacity:0;transform:scale(0)}50%{opacity:1;transform:scale(1.3)}to{opacity:1;transform:scale(1)}}.card-unlocking{animation:unlockPop .5s ease-out both,unlockGlow .8s ease-out both;animation-delay:inherit;opacity:1!important;cursor:pointer!important}.card-unlocking .premium-badge{animation:unlockShake .4s ease-out both,badgeFadeOut .5s ease-out .3s forwards;animation-delay:inherit}.card-unlocking .unlock-checkmark{position:absolute;top:var(--space-sm);right:var(--space-sm);width:24px;height:24px;background:var(--color-success);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;animation:checkmarkPop .3s ease-out .6s both;animation-delay:inherit;z-index:2}.card-unlocking .unlock-checkmark svg{width:14px;height:14px}.escape-room-splash{display:flex;align-items:center;justify-content:center;min-height:60vh;padding:var(--space-lg)}.escape-room-splash-content{background:linear-gradient(135deg,#1a1a2e,#16213e);border-radius:var(--radius-xl);padding:var(--space-2xl);text-align:center;max-width:480px;width:100%;color:#fff;box-shadow:0 20px 60px #0000004d}.escape-room-icon{font-size:4rem;margin-bottom:var(--space-lg);animation:doorPulse 2s ease-in-out infinite}@keyframes doorPulse{0%,to{transform:scale(1)}50%{transform:scale(1.1)}}.escape-room-splash-content h2{font-family:var(--font-display);font-size:2rem;margin-bottom:var(--space-md);color:gold}.escape-room-splash-content p{color:#fffc;margin-bottom:var(--space-xl);line-height:1.6}.escape-room-rules{display:flex;flex-direction:column;gap:var(--space-sm);margin-bottom:var(--space-xl);text-align:left}.escape-room-rule{background:#ffffff1a;padding:var(--space-sm) var(--space-md);border-radius:var(--radius-md);font-size:.9rem}.escape-room-wrapper{max-width:100%;width:100%;margin:0;display:flex;flex-direction:column;gap:var(--space-xs);padding:0;height:calc(100vh - 180px);min-height:400px}.escape-room-hud{display:flex;justify-content:space-between;padding:var(--space-xs) var(--space-md);background:linear-gradient(135deg,#1a1a2e,#16213e);border-radius:var(--radius-md);color:#fff;flex-shrink:0}.escape-room-hud-item{display:flex;flex-direction:column;align-items:center}.escape-room-hud-label{font-size:.7rem;color:#fff9;text-transform:uppercase;letter-spacing:.05em}.escape-room-hud-value{font-family:var(--font-display);font-size:1.1rem;font-weight:600;color:gold}.escape-room-canvas{width:100%;flex:1;min-height:300px;border-radius:var(--radius-md);overflow:hidden;cursor:crosshair;box-shadow:0 4px 20px #0003;position:relative}.escape-room-crosshair{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:2rem;color:#fffc;pointer-events:none;text-shadow:0 0 4px rgba(0,0,0,.8);z-index:10}.escape-room-mobile-controls{display:none}.escape-room-joystick-overlay{display:none;position:fixed;bottom:0;left:0;right:0;height:180px;pointer-events:none;z-index:100;justify-content:space-between;align-items:center;padding:0 10px 20px;box-sizing:border-box}.escape-room-joystick{width:min(100px,25vw);height:min(100px,25vw);background:#ffffff26;border:3px solid rgba(255,255,255,.3);border-radius:50%;position:relative;pointer-events:auto;touch-action:none;flex-shrink:0}.escape-room-joystick-knob{width:45%;height:45%;background:#ffffff80;border:2px solid rgba(255,255,255,.8);border-radius:50%;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);transition:transform .05s ease-out;box-shadow:0 2px 10px #0000004d}.escape-room-action-btn{width:min(60px,15vw);height:min(60px,15vw);background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-primary-dark) 100%);border:3px solid rgba(255,255,255,.5);border-radius:50%;font-size:clamp(1.2rem,4vw,2rem);cursor:pointer;pointer-events:auto;box-shadow:0 4px 15px #0000004d;display:flex;align-items:center;justify-content:center;transition:transform .1s;flex-shrink:0}.escape-room-action-btn:active{transform:scale(.9)}@media (max-width: 768px){.escape-room-joystick-overlay{display:flex}.escape-room-crosshair{display:none}.escape-room-canvas.mobile-fullscreen{position:fixed!important;top:0;left:0;width:100vw!important;height:100vh!important;border-radius:0;z-index:50}.escape-room-wrapper{position:fixed;top:0;left:0;width:100vw;height:100vh;padding:0;margin:0}.escape-room-hud{position:fixed;top:10px;left:10px;right:10px;z-index:101;background:#1a1a2ee6;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.escape-room-prompt{display:none}}.escape-room-prompt{text-align:center;padding:var(--space-md);background:var(--color-surface);border-radius:var(--radius-lg);font-weight:600;display:flex;align-items:center;justify-content:center;gap:var(--space-sm);box-shadow:var(--shadow-md)}.escape-room-prompt-pulse{animation:promptPulse 1.5s ease-in-out infinite}@keyframes promptPulse{0%,to{transform:scale(1);opacity:1}50%{transform:scale(1.2);opacity:.7}}.escape-room-puzzle{position:fixed;top:0;right:0;bottom:0;left:0;background:#000c;display:flex;align-items:center;justify-content:center;z-index:1000;padding:var(--space-lg);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.escape-room-puzzle-card{background:var(--color-surface);border-radius:var(--radius-xl);padding:var(--space-xl);max-width:400px;width:100%;text-align:center;animation:puzzleSlideIn .3s ease-out}@keyframes puzzleSlideIn{0%{opacity:0;transform:scale(.9) translateY(20px)}to{opacity:1;transform:scale(1) translateY(0)}}.escape-room-lock-icon{font-size:3rem;margin-bottom:var(--space-md);animation:lockWiggle .5s ease-in-out}@keyframes lockWiggle{0%,to{transform:rotate(0)}25%{transform:rotate(-10deg)}75%{transform:rotate(10deg)}}.escape-room-puzzle-card h3{font-family:var(--font-display);font-size:1.25rem;margin-bottom:var(--space-md);color:var(--color-text)}.escape-room-word{font-family:var(--font-display);font-size:1.75rem;font-weight:700;color:var(--color-primary);margin-bottom:var(--space-lg);padding:var(--space-md);background:var(--color-primary-bg);border-radius:var(--radius-lg)}.escape-room-input{width:100%;padding:var(--space-md);font-size:1.125rem;border:2px solid var(--color-border);border-radius:var(--radius-lg);text-align:center;font-family:var(--font-sans);transition:all .2s;margin-bottom:var(--space-md)}.escape-room-input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px var(--color-primary-bg)}.escape-room-input.correct{border-color:var(--color-success);background:var(--color-success-light)}.escape-room-input.wrong{border-color:var(--color-danger);background:var(--color-danger-light);animation:inputShake .4s ease-in-out}@keyframes inputShake{0%,to{transform:translate(0)}20%{transform:translate(-8px)}40%{transform:translate(8px)}60%{transform:translate(-4px)}80%{transform:translate(4px)}}.escape-room-hint{background:var(--color-warning-light);color:var(--color-text);padding:var(--space-sm) var(--space-md);border-radius:var(--radius-md);font-size:.9rem;margin-bottom:var(--space-md)}.escape-room-puzzle-actions{display:flex;gap:var(--space-md);justify-content:center}.escape-room-puzzle-actions .btn{flex:1;max-width:150px}.escape-room-feedback{margin-top:var(--space-lg);padding:var(--space-md);border-radius:var(--radius-md);font-weight:700;font-size:1.125rem}.escape-room-feedback.correct{background:var(--color-success-light);color:var(--color-success)}.escape-room-feedback.wrong{background:var(--color-danger-light);color:var(--color-danger)}.escape-room-feedback-overlay{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;z-index:100;pointer-events:none}.escape-room-feedback-overlay.correct{background:#65d9ba4d}.escape-room-feedback-overlay.wrong{background:#ff6b6b4d}.escape-room-feedback-content{background:var(--color-surface);padding:var(--space-xl) var(--space-2xl);border-radius:var(--radius-xl);text-align:center;box-shadow:var(--shadow-xl);animation:feedbackPop .3s ease-out}@keyframes feedbackPop{0%{transform:scale(.8);opacity:0}to{transform:scale(1);opacity:1}}.escape-room-feedback-icon{font-size:4rem;margin-bottom:var(--space-md)}.escape-room-feedback-overlay.correct .escape-room-feedback-icon{color:var(--color-success)}.escape-room-feedback-overlay.wrong .escape-room-feedback-icon{color:var(--color-danger)}.escape-room-feedback-text{font-family:var(--font-display);font-size:1.5rem;font-weight:700;margin-bottom:var(--space-sm)}.escape-room-feedback-detail{color:var(--color-text-secondary);font-size:1rem}.escape-room-transition{position:fixed;top:0;right:0;bottom:0;left:0;background:#000000e6;display:flex;align-items:center;justify-content:center;z-index:1001;animation:transitionFade .5s ease-in-out}@keyframes transitionFade{0%{opacity:0}50%{opacity:1}to{opacity:0}}.escape-room-transition-text{font-family:var(--font-display);font-size:2rem;color:gold;text-align:center;animation:transitionPop .5s ease-out}@keyframes transitionPop{0%{transform:scale(.5);opacity:0}50%{transform:scale(1.1);opacity:1}to{transform:scale(1);opacity:1}}.escape-room-prompt{position:relative;background:linear-gradient(135deg,#1a1a2e,#16213e);color:#fff;padding:var(--space-xs) var(--space-md);border-radius:var(--radius-md);font-size:.85rem;text-align:center;flex-shrink:0;margin-top:var(--space-sm)}.escape-room-clues{display:flex;flex-direction:column;gap:var(--space-xs);margin-bottom:var(--space-sm)}.escape-room-clue{padding:var(--space-xs) var(--space-sm);border-radius:var(--radius-md);font-size:.85rem}.escape-room-clue-hard{background:#dc262633;border:1px solid rgba(220,38,38,.5)}.escape-room-clue-medium{background:#d9770633;border:1px solid rgba(217,119,6,.5)}.escape-room-clue-easy{background:#16a34a33;border:1px solid rgba(22,163,74,.5)}@media (max-width: 480px){.escape-room-splash-content{padding:var(--space-lg)}.escape-room-splash-content h2{font-size:1.5rem}.escape-room-icon{font-size:3rem}.escape-room-puzzle-card{padding:var(--space-lg)}.escape-room-word{font-size:1.5rem}.escape-room-hud{padding:var(--space-xs) var(--space-sm)}.escape-room-hud-value{font-size:1rem}.escape-room-prompt{bottom:180px;font-size:.8rem}}