:root{--color-primary: #3b82f6;--color-primary-dark: #2563eb;--color-secondary: #8b5cf6;--color-success: #10b981;--color-warning: #f59e0b;--color-danger: #ef4444;--bg-primary: #0f172a;--bg-secondary: #1e293b;--bg-card: #334155;--bg-hover: #475569;--text-primary: #f8fafc;--text-secondary: #94a3b8;--text-muted: #64748b;--spacing-xs: 4px;--spacing-sm: 8px;--spacing-md: 16px;--spacing-lg: 24px;--spacing-xl: 32px;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--radius-full: 9999px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px rgba(0, 0, 0, .3);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .4)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg-primary);color:var(--text-primary);min-height:100vh;-webkit-font-smoothing:antialiased}.app{max-width:600px;margin:0 auto;min-height:100vh;background:var(--bg-secondary)}.header{background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));padding:var(--spacing-lg);position:sticky;top:0;z-index:100}.header h1{font-size:1.5rem;font-weight:700;margin-bottom:var(--spacing-xs)}.header-subtitle{font-size:.875rem;opacity:.8}.stats-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--spacing-sm);padding:var(--spacing-md)}.stat-card{background:var(--bg-card);border-radius:var(--radius-md);padding:var(--spacing-md);text-align:center}.stat-value{font-size:2rem;font-weight:700;color:var(--color-primary)}.stat-label{font-size:.75rem;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px}.stat-card.overdue .stat-value{color:var(--color-danger)}.stat-card.completed .stat-value{color:var(--color-success)}.task-list{padding:var(--spacing-md)}.task-list-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-md)}.task-list-title{font-size:1.125rem;font-weight:600}.task-card{background:var(--bg-card);border-radius:var(--radius-md);padding:var(--spacing-md);min-height:72px;margin-bottom:var(--spacing-sm);cursor:pointer;transition:all .2s cubic-bezier(.4,0,.2,1);border-left:4px solid transparent;-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none}.task-card:hover{background:var(--bg-hover);transform:translate(4px);box-shadow:0 2px 8px #0003}.task-card:active{transform:translate(2px) scale(.99);opacity:.9}.task-card.priority-urgent{border-left-color:var(--color-danger)}.task-card.priority-high{border-left-color:var(--color-warning)}.task-card.priority-medium{border-left-color:var(--color-primary)}.task-card.priority-low{border-left-color:var(--color-success)}.task-title{font-weight:600;margin-bottom:var(--spacing-xs);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.task-meta{display:flex;gap:var(--spacing-sm);flex-wrap:wrap;margin-top:var(--spacing-sm)}.task-badge{font-size:.75rem;padding:2px 8px;border-radius:var(--radius-full);background:#ffffff1a;color:var(--text-secondary)}.task-badge.overdue{background:#ef444433;color:var(--color-danger)}.progress-bar{height:4px;background:#ffffff1a;border-radius:var(--radius-full);margin-top:var(--spacing-sm);overflow:hidden}.progress-fill{height:100%;background:linear-gradient(90deg,var(--color-primary),var(--color-secondary));border-radius:var(--radius-full);transition:width .3s ease}.login-container{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:var(--spacing-lg)}.login-card{background:var(--bg-card);border-radius:var(--radius-lg);padding:var(--spacing-xl);width:100%;max-width:400px}.login-title{font-size:1.5rem;font-weight:700;text-align:center;margin-bottom:var(--spacing-lg)}.form-label{display:block;font-size:.875rem;color:var(--text-secondary);margin-bottom:var(--spacing-xs)}.form-input{width:100%;padding:var(--spacing-md);border:1px solid var(--bg-hover);border-radius:var(--radius-md);background:var(--bg-secondary);color:var(--text-primary);font-size:1rem;outline:none;transition:border-color .2s ease}.form-input:focus{border-color:var(--color-primary)}.btn{display:inline-flex;align-items:center;justify-content:center;padding:var(--spacing-md) var(--spacing-lg);border-radius:var(--radius-md);font-size:1rem;font-weight:600;cursor:pointer;border:none;transition:all .2s ease}.btn-primary{background:linear-gradient(135deg,var(--color-primary),var(--color-primary-dark));color:#fff;width:100%}.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.btn-primary:disabled{opacity:.6;cursor:not-allowed;transform:none}.error-message{background:#ef44441a;border:1px solid var(--color-danger);color:var(--color-danger);padding:var(--spacing-md);border-radius:var(--radius-md);margin-bottom:var(--spacing-md);font-size:.875rem}.bottom-nav{position:fixed;bottom:0;left:50%;transform:translate(-50%);width:100%;max-width:600px;background:#1e293bd9;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border-top:1px solid rgba(255,255,255,.1);display:flex;justify-content:space-around;align-items:center;padding:var(--spacing-sm) 0;padding-bottom:max(var(--spacing-sm),env(safe-area-inset-bottom));box-shadow:0 -4px 30px #0000004d}.nav-item{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:8px 16px;min-height:56px;min-width:72px;color:var(--text-muted);text-decoration:none;font-size:.7rem;font-weight:500;transition:all .3s cubic-bezier(.4,0,.2,1);border-radius:var(--radius-md);background:transparent;border:none;cursor:pointer;position:relative}.nav-item:before{content:"";position:absolute;top:0;left:50%;transform:translate(-50%) scaleX(0);width:40px;height:3px;background:linear-gradient(90deg,var(--color-primary),var(--color-secondary));border-radius:0 0 4px 4px;transition:transform .3s ease}.nav-item:hover{color:var(--text-secondary);background:#ffffff0d}.nav-item.active{color:var(--color-primary)}.nav-item.active:before{transform:translate(-50%) scaleX(1)}.nav-item.active .nav-icon{transform:scale(1.15);filter:drop-shadow(0 0 8px rgba(59,130,246,.5))}.nav-icon{font-size:1.4rem;margin-bottom:4px;transition:all .3s ease}.nav-item:active{transform:scale(.95)}.nav-item:active .nav-icon{transform:scale(.9)}.loading{display:flex;align-items:center;justify-content:center;padding:var(--spacing-xl)}.loading-spinner{width:40px;height:40px;border:3px solid var(--bg-hover);border-top-color:var(--color-primary);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.empty-state{text-align:center;padding:var(--spacing-xl);color:var(--text-secondary)}.empty-icon{font-size:3rem;margin-bottom:var(--spacing-md)}.notification-badge{position:absolute;top:-4px;right:-4px;background:var(--color-danger);color:#fff;font-size:.625rem;min-width:16px;height:16px;border-radius:50%;display:flex;align-items:center;justify-content:center}.ptr-loading{text-align:center;padding:var(--spacing-md);color:var(--text-secondary)}.module-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--spacing-md);padding:var(--spacing-md)}.module-card{background:var(--bg-card);border-radius:var(--radius-lg);padding:var(--spacing-lg) var(--spacing-md);min-height:120px;text-align:center;cursor:pointer;transition:all .3s cubic-bezier(.4,0,.2,1);position:relative;border:1px solid transparent;-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none}.module-card:hover{background:var(--bg-hover);transform:translateY(-4px);border-color:var(--module-color, var(--color-primary));box-shadow:0 8px 24px #0000004d}.module-card:active{transform:translateY(-2px) scale(.98);box-shadow:0 4px 12px #0000004d}.module-icon{font-size:2rem;margin-bottom:var(--spacing-sm);filter:drop-shadow(0 4px 8px rgba(0,0,0,.3))}.module-name{font-weight:600;font-size:.875rem;margin-bottom:4px}.module-desc{font-size:.7rem;color:var(--text-muted)}.module-badge{position:absolute;top:8px;right:8px;background:var(--color-danger);color:#fff;font-size:.625rem;min-width:18px;height:18px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700}.quick-stats{padding:0 var(--spacing-md) var(--spacing-md)}.section-title{font-size:1rem;font-weight:600;margin-bottom:var(--spacing-md);color:var(--text-primary)}.notification-banner{margin:0 var(--spacing-md) var(--spacing-md);padding:var(--spacing-lg);background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));border-radius:var(--radius-lg)}.notification-banner h4{margin-bottom:var(--spacing-sm)}.notification-banner p{font-size:.875rem;opacity:.9;margin-bottom:var(--spacing-md)}.btn-notification{padding:10px 20px;background:#fff3;border:none;border-radius:var(--radius-md);color:#fff;cursor:pointer;font-weight:600;transition:background .2s ease}.btn-notification:hover{background:#ffffff4d}.subpage-header{display:flex;align-items:center;gap:var(--spacing-md);padding:var(--spacing-md) var(--spacing-lg);background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));position:sticky;top:0;z-index:100}.back-button{background:#fff3;border:none;border-radius:50%;min-width:44px;min-height:44px;width:44px;height:44px;display:flex;align-items:center;justify-content:center;cursor:pointer;color:#fff;font-size:1.25rem;transition:all .2s ease}.back-button:hover{background:#ffffff4d;transform:scale(1.05)}.back-button:active{transform:scale(.95);background:#fff6}.subpage-title{font-size:1.25rem;font-weight:700}.list-container{padding:var(--spacing-md);padding-bottom:100px}.list-card{background:var(--bg-card);border-radius:var(--radius-md);padding:var(--spacing-md);margin-bottom:var(--spacing-sm);transition:all .2s ease}.list-card:hover{background:var(--bg-hover)}.list-card-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:var(--spacing-sm)}.list-card-title{font-weight:600;font-size:.95rem}.list-card-meta{display:flex;gap:var(--spacing-sm);flex-wrap:wrap;font-size:.8rem;color:var(--text-secondary)}.status-badge{padding:4px 10px;border-radius:var(--radius-full);font-size:.75rem;font-weight:600;text-transform:uppercase}.status-badge.pending{background:#f59e0b33;color:var(--color-warning)}.status-badge.approved,.status-badge.confirmed{background:#10b98133;color:var(--color-success)}.status-badge.rejected,.status-badge.cancelled{background:#ef444433;color:var(--color-danger)}.approval-actions{display:flex;gap:var(--spacing-sm);margin-top:var(--spacing-md)}.btn-approve{flex:1;padding:12px 16px;min-height:44px;background:var(--color-success);border:none;border-radius:var(--radius-md);color:#fff;font-weight:600;cursor:pointer;transition:all .2s cubic-bezier(.4,0,.2,1);-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none}.btn-approve:hover{opacity:.9;transform:translateY(-1px);box-shadow:0 4px 12px #10b9814d}.btn-approve:active{transform:scale(.97);box-shadow:0 2px 6px #10b9814d}.btn-reject{flex:1;padding:12px 16px;min-height:44px;background:var(--color-danger);border:none;border-radius:var(--radius-md);color:#fff;font-weight:600;cursor:pointer;transition:all .2s cubic-bezier(.4,0,.2,1);-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none}.btn-reject:hover{opacity:.9;transform:translateY(-1px);box-shadow:0 4px 12px #ef44444d}.btn-reject:active{transform:scale(.97);box-shadow:0 2px 6px #ef44444d}.calendar-container{padding:var(--spacing-md)}.calendar-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-md)}.calendar-nav{display:flex;gap:var(--spacing-sm)}.calendar-nav button{background:var(--bg-card);border:none;border-radius:var(--radius-sm);padding:var(--spacing-sm) var(--spacing-md);color:var(--text-primary);cursor:pointer;transition:background .2s ease}.calendar-nav button:hover{background:var(--bg-hover)}.calendar-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:4px}.calendar-day-header{text-align:center;font-size:.75rem;color:var(--text-muted);padding:var(--spacing-sm)}.calendar-day{aspect-ratio:1;display:flex;flex-direction:column;align-items:center;justify-content:center;background:var(--bg-card);border-radius:var(--radius-sm);font-size:.875rem;cursor:pointer;transition:all .2s ease;position:relative}.calendar-day:hover{background:var(--bg-hover)}.calendar-day.today{border:2px solid var(--color-primary)}.calendar-day.has-event:after{content:"";position:absolute;bottom:4px;width:6px;height:6px;background:var(--color-primary);border-radius:50%}.calendar-day.missing{background:#ef444433}.calendar-day.missing:after{background:var(--color-danger)}.tabs{display:flex;padding:0 var(--spacing-md);gap:var(--spacing-sm);border-bottom:1px solid var(--bg-card)}.tab{padding:var(--spacing-md);background:transparent;border:none;color:var(--text-muted);font-weight:500;cursor:pointer;position:relative;transition:color .2s ease}.tab.active{color:var(--color-primary)}.tab.active:after{content:"";position:absolute;bottom:-1px;left:0;right:0;height:2px;background:var(--color-primary)}.date-filter{display:flex;align-items:center;justify-content:center;gap:var(--spacing-sm);padding:var(--spacing-md);background:var(--bg-secondary)}.date-input{padding:var(--spacing-sm) var(--spacing-md);background:var(--bg-card);border:1px solid var(--bg-hover);border-radius:var(--radius-sm);color:var(--text-primary);font-size:.9rem;font-family:inherit}.date-nav{width:36px;height:36px;background:var(--bg-card);border:none;border-radius:var(--radius-sm);color:var(--text-primary);font-size:1rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s ease}.date-nav:hover{background:var(--bg-hover)}.filter-bar{display:flex;gap:var(--spacing-xs);padding:var(--spacing-sm) var(--spacing-md);overflow-x:auto;-webkit-overflow-scrolling:touch}.filter-btn{padding:6px 12px;background:var(--bg-card);border:none;border-radius:var(--radius-full);color:var(--text-muted);font-size:.75rem;font-weight:500;cursor:pointer;white-space:nowrap;transition:all .2s ease}.filter-btn.active{background:var(--color-primary);color:#fff}.list-card.clickable{cursor:pointer;transition:transform .2s ease,box-shadow .2s ease}.list-card.clickable:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.list-card.clickable:active{transform:scale(.98)}.modal-overlay{position:fixed;inset:0;background:#000000b3;display:flex;align-items:center;justify-content:center;z-index:1000;padding:var(--spacing-md)}.modal-content{background:var(--bg-secondary);border-radius:var(--radius-lg);width:100%;max-width:400px;max-height:90vh;overflow:hidden;animation:modalSlideIn .3s ease}@keyframes modalSlideIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-md);border-bottom:1px solid var(--bg-card)}.modal-header h3{font-size:1.1rem;font-weight:600;margin:0}.modal-close{width:32px;height:32px;background:var(--bg-card);border:none;border-radius:var(--radius-full);color:var(--text-secondary);font-size:1rem;cursor:pointer;display:flex;align-items:center;justify-content:center}.modal-close:hover{background:var(--bg-hover);color:var(--text-primary)}.modal-body{padding:var(--spacing-md);overflow-y:auto;max-height:70vh}.detail-row{display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-sm) 0;border-bottom:1px solid var(--bg-card)}.detail-row:last-child{border-bottom:none}.detail-label{color:var(--text-muted);font-size:.85rem}.participant-badge{display:inline-block;padding:4px 8px;background:var(--bg-card);border-radius:var(--radius-sm);font-size:.8rem;margin:2px}.time-slots{display:flex;flex-direction:column;gap:4px}.time-slot{display:flex;align-items:center;padding:8px 12px;border-radius:var(--radius-sm);font-size:.85rem}.time-slot.available{background:#10b9811a;border:1px solid rgba(16,185,129,.3)}.time-slot.booked{background:#ef44441a;border:1px solid rgba(239,68,68,.3)}.slot-time{font-weight:600;width:50px;color:var(--text-primary)}.slot-info{flex:1;color:var(--text-secondary);font-size:.8rem}.slot-info.available{color:var(--color-success)}.badge-count{display:inline-flex;align-items:center;justify-content:center;min-width:18px;height:18px;padding:0 5px;background:var(--color-danger);color:#fff;font-size:.7rem;font-weight:600;border-radius:var(--radius-full);margin-left:6px}.bento-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--spacing-md);padding:var(--spacing-md)}.bento-item{background:var(--bg-card);border-radius:var(--radius-md);padding:var(--spacing-md);display:flex;flex-direction:column;transition:transform .2s ease}.bento-item:active{transform:scale(.98)}.bento-item.large{grid-column:span 2}.bento-item.tall{grid-row:span 2}.bento-icon{font-size:1.5rem;margin-bottom:var(--spacing-sm)}.bento-title{font-weight:600;font-size:1rem;margin-bottom:4px}.bento-desc{font-size:.75rem;color:var(--text-secondary)}.form-group{margin-bottom:var(--spacing-md)}.form-group label{display:block;font-size:.85rem;font-weight:500;color:var(--text-secondary);margin-bottom:var(--spacing-xs)}.form-input{width:100%;padding:var(--spacing-sm) var(--spacing-md);background:var(--bg-card);border:1px solid var(--bg-hover);border-radius:var(--radius-sm);color:var(--text-primary);font-size:.9rem;font-family:inherit;transition:border-color .2s ease}.form-input:focus{outline:none;border-color:var(--color-primary)}.form-input::placeholder{color:var(--text-muted)}textarea.form-input{resize:vertical;min-height:80px}select.form-input{cursor:pointer}.form-actions{display:flex;gap:var(--spacing-sm);margin-top:var(--spacing-lg)}.btn-primary{flex:1;padding:var(--spacing-sm) var(--spacing-md);background:var(--color-primary);color:#fff;border:none;border-radius:var(--radius-sm);font-size:.9rem;font-weight:600;cursor:pointer;transition:opacity .2s ease}.btn-primary:hover{opacity:.9}.btn-primary:disabled{opacity:.5;cursor:not-allowed}.btn-secondary{flex:1;padding:var(--spacing-sm) var(--spacing-md);background:var(--bg-card);color:var(--text-secondary);border:1px solid var(--bg-hover);border-radius:var(--radius-sm);font-size:.9rem;font-weight:500;cursor:pointer;transition:background .2s ease}.btn-secondary:hover{background:var(--bg-hover)}.subpage-header{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-md);background:var(--bg-secondary)}.subpage-header .subpage-title{flex:1}.skeleton{background:linear-gradient(90deg,var(--bg-card) 0%,var(--bg-hover) 50%,var(--bg-card) 100%);background-size:200% 100%;animation:shimmer 1.5s ease-in-out infinite;border-radius:var(--radius-sm)}@keyframes shimmer{0%{background-position:-200% 0}to{background-position:200% 0}}.skeleton-card{background:var(--bg-card);border-radius:var(--radius-lg);padding:var(--spacing-md);margin-bottom:var(--spacing-sm)}.skeleton-title{height:20px;width:70%;margin-bottom:12px}.skeleton-text{height:14px;width:100%;margin-bottom:8px}.skeleton-text.short{width:40%}.skeleton-module{background:var(--bg-card);border-radius:var(--radius-lg);padding:var(--spacing-md);display:flex;flex-direction:column;align-items:center;text-align:center;min-height:120px}.skeleton-icon{width:48px;height:48px;border-radius:var(--radius-md);margin-bottom:var(--spacing-sm)}.skeleton-module-name{height:18px;width:80%;margin-bottom:8px}.skeleton-module-desc{height:14px;width:60%}.skeleton-task{background:var(--bg-card);border-radius:var(--radius-md);padding:var(--spacing-md);margin-bottom:var(--spacing-sm);border-left:4px solid var(--bg-hover)}.skeleton-task-title{height:18px;width:75%;margin-bottom:12px}.skeleton-task-meta{display:flex;gap:var(--spacing-sm)}.skeleton-badge{height:24px;width:80px;border-radius:var(--radius-full)}.skeleton-notification{display:flex;gap:var(--spacing-md);background:var(--bg-card);border-radius:var(--radius-md);padding:var(--spacing-md);margin-bottom:var(--spacing-sm)}.skeleton-notification-icon{width:40px;height:40px;border-radius:50%;flex-shrink:0}.skeleton-notification-content{flex:1}.skeleton-notification-title{height:16px;width:70%;margin-bottom:8px}.skeleton-notification-text{height:14px;width:100%;margin-bottom:8px}.skeleton-notification-time{height:12px;width:30%}.pull-to-refresh-container{position:relative;overflow:hidden}.pull-to-refresh-indicator{position:fixed;top:0;left:50%;transform:translate(-50%);max-width:600px;width:100%;height:80px;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;padding-bottom:12px;gap:8px;pointer-events:none;z-index:999}.pull-icon{font-size:24px;transition:transform .3s ease;display:flex;align-items:center;justify-content:center;width:40px;height:40px;background:var(--bg-card);border-radius:50%;box-shadow:var(--shadow-md)}.pull-icon.refreshing{animation:spin 1s linear infinite}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.pull-text{font-size:.875rem;color:var(--text-secondary);font-weight:500}.content-loaded{animation:fadeInUp .4s ease-out}@keyframes fadeInUp{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media(prefers-reduced-motion:reduce){.skeleton,.pull-icon,.content-loaded{animation:none!important}*{transition-duration:.01ms!important}}@keyframes slideDown{0%{transform:translateY(-100%);opacity:0}to{transform:translateY(0);opacity:1}}.quiz-container{min-height:100vh;background:linear-gradient(135deg,#1a1a2e,#16213e,#0f3460);color:#fff;padding:1rem;display:flex;flex-direction:column}.quiz-header{display:flex;justify-content:space-between;align-items:center;padding:.5rem}.back-btn{background:#ffffff1a;border:none;color:#fff;padding:.5rem 1rem;border-radius:.5rem;cursor:pointer}.player-info{display:flex;flex-direction:column;align-items:flex-end}.player-name{font-weight:600}.player-score{color:#fbbf24;font-weight:700}.quiz-join{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:2rem}.join-icon{font-size:4rem;margin-bottom:1rem;animation:bounce 1s infinite}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}.quiz-join h1{font-size:2rem;margin-bottom:.5rem}.quiz-join p{color:#9ca3af;margin-bottom:2rem}.join-form{width:100%;max-width:300px}.join-input{width:100%;padding:1rem;font-size:1.25rem;text-align:center;border:2px solid rgba(255,255,255,.3);border-radius:1rem;background:#ffffff1a;color:#fff;margin-bottom:1rem;text-transform:uppercase}.join-input::placeholder{color:#ffffff80}.join-input:focus{outline:none;border-color:#ec4899}.error-msg{color:#f87171;margin-bottom:1rem}.join-btn{width:100%;padding:1rem;font-size:1.25rem;font-weight:700;background:linear-gradient(135deg,#ec4899,#8b5cf6);border:none;border-radius:1rem;color:#fff;cursor:pointer;transition:transform .2s,opacity .2s}.join-btn:hover{transform:scale(1.02)}.join-btn:disabled{opacity:.7;cursor:not-allowed}.quiz-waiting{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center}.waiting-icon{font-size:4rem;animation:pulse 2s infinite}@keyframes pulse{0%,to{opacity:1}50%{opacity:.5}}.player-count{margin-top:2rem;padding:1rem 2rem;background:#ffffff1a;border-radius:1rem;display:flex;flex-direction:column}.player-count .count{font-size:3rem;font-weight:700;color:#fbbf24}.quiz-playing{flex:1;display:flex;flex-direction:column}.timer-container{display:flex;align-items:center;justify-content:space-between;margin-bottom:1rem}.timer{width:4rem;height:4rem;display:flex;align-items:center;justify-content:center;font-size:1.5rem;font-weight:700;background:#fff3;border-radius:50%}.timer.urgent{background:#ef4444;animation:pulse .5s infinite}.question-num{color:#9ca3af;font-size:.875rem}.question-card{background:#ffffff1a;padding:1.5rem;border-radius:1rem;margin-bottom:1rem}.question-card h2{font-size:1.25rem;line-height:1.5;text-align:center}.options-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:.75rem;flex:1}.quiz-option{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:1rem;border:none;border-radius:1rem;color:#fff;cursor:pointer;font-weight:600;transition:transform .2s,opacity .2s;min-height:100px}.quiz-option:active{transform:scale(.95)}.quiz-option:disabled{opacity:.8;cursor:not-allowed}.option-a{background:linear-gradient(135deg,#e74c3c,#c0392b)}.option-b{background:linear-gradient(135deg,#3498db,#2980b9)}.option-c{background:linear-gradient(135deg,#f1c40f,#f39c12)}.option-d{background:linear-gradient(135deg,#2ecc71,#27ae60)}.option-letter{font-size:1.5rem;margin-bottom:.25rem}.option-text{font-size:.875rem;text-align:center}.quiz-option.selected{box-shadow:0 0 0 4px #fff}.quiz-option.correct{background:#22c55e!important;box-shadow:0 0 20px #22c55e}.quiz-option.wrong{background:#ef4444!important;box-shadow:0 0 20px #ef4444}.answer-result{position:fixed;bottom:2rem;left:50%;transform:translate(-50%);padding:1rem 2rem;border-radius:1rem;display:flex;align-items:center;gap:.5rem;font-weight:600;animation:slideUp .3s ease}@keyframes slideUp{0%{transform:translate(-50%) translateY(20px);opacity:0}to{transform:translate(-50%) translateY(0);opacity:1}}.answer-result.correct{background:#22c55e}.answer-result.wrong{background:#ef4444}.result-icon{font-size:1.5rem}.result-score{color:#fbbf24}.quiz-finished{flex:1;display:flex;flex-direction:column;align-items:center;padding:1rem}.finished-icon{font-size:4rem;margin-bottom:1rem}.my-result{display:flex;flex-direction:column;align-items:center;margin-bottom:1.5rem;padding:1rem 2rem;background:linear-gradient(135deg,#fbbf24,#f59e0b);border-radius:1rem}.my-result .rank{font-size:1.5rem;font-weight:700}.my-result .score{font-size:1.25rem}.leaderboard{width:100%;max-width:400px}.leaderboard h3{text-align:center;margin-bottom:1rem}.leader-item{display:flex;align-items:center;padding:.75rem 1rem;background:#ffffff1a;border-radius:.5rem;margin-bottom:.5rem}.leader-item.me{background:#fbbf244d;border:2px solid #fbbf24}.leader-rank{width:2.5rem;font-size:1.25rem}.leader-name{flex:1;font-weight:500}.leader-score{color:#fbbf24;font-weight:700}.back-home-btn{margin-top:1.5rem;padding:1rem 2rem;background:#fff3;border:none;border-radius:1rem;color:#fff;font-weight:600;cursor:pointer}