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.15s;flex-shrink:0;padding:0}.color-swatch:hover{transform:scale(1.15)}.color-swatch.active{border-color:var(--text-primary);transform:scale(1.15)}.icon-picker{display:flex;flex-wrap:wrap;gap:6px}.icon-option{width:36px;height:36px;display:flex;align-items:center;justify-content:center;border:2px solid transparent;border-radius:8px;background:transparent;cursor:pointer;transition:all .15s}.icon-option:hover{background:#0000000a}.icon-option.active{border-color:currentColor;background:#0000000a}.dialog-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:20px}.btn-primary{padding:8px 20px;border:none;border-radius:8px;background:var(--primary-color);color:#fff;font-weight:600;font-size:.9rem;cursor:pointer;transition:background .15s}.btn-primary:hover{background:var(--primary-hover)}.btn-secondary{padding:8px 20px;border:1px solid #ddd;border-radius:8px;background:#fff;color:var(--text-primary);font-weight:500;font-size:.9rem;cursor:pointer;transition:all .15s}.btn-secondary:hover{border-color:#bbb;background:#fafafa}.btn-danger{padding:8px 20px;border:1px solid #e53935;border-radius:8px;background:#ffebee;color:#c62828;font-weight:600;font-size:.9rem;cursor:pointer;transition:all .15s}.btn-danger:hover{background:#e53935;color:#fff}.move-to-list{display:flex;flex-direction:column;gap:2px;max-height:320px;overflow-y:auto;margin:12px 0}.move-to-item{display:flex;align-items:center;gap:8px;padding:10px 12px;border:none;border-radius:8px;background:transparent;text-align:left;font-size:.9rem;cursor:pointer;transition:background .15s;color:var(--text-primary)}.move-to-item:hover{background:#0000000d}.context-menu{position:fixed;z-index:300;background:#fff;border-radius:10px;box-shadow:0 8px 32px #00000026;padding:6px;min-width:140px;max-width:calc(100vw - 24px)}.context-menu button{display:flex;align-items:center;gap:8px;width:100%;padding:8px 12px;border:none;border-radius:6px;background:transparent;font-size:.88rem;cursor:pointer;color:var(--text-primary);transition:background .12s}.context-menu button:hover{background:#0000000d}.context-menu button.danger{color:#e53935}.context-menu button.danger:hover{background:#ffebee}@media(max-width:600px){.history-grid{grid-template-columns:1fr}.history-header{flex-direction:column}.batch-action-bar{left:12px;right:12px;bottom:calc(12px + env(safe-area-inset-bottom,0px));transform:none;flex-wrap:wrap;justify-content:center;z-index:150;gap:8px;padding:10px 16px}.batch-action-bar button{padding:10px 16px;min-height:44px;font-size:.88rem}.dialog{width:calc(100vw - 32px)}}.slide-empty{padding:60px;text-align:center;color:var(--text-tertiary);font-size:1.1rem}@media(max-width:900px){.slide-main{flex-direction:column}.slide-notes-panel{border-left:none;border-top:1px solid var(--border-color)}.slide-split{flex-direction:column}.slide-split-side{max-width:100%}.slide-content{padding:24px}}.pdf-export-bar{display:flex;justify-content:flex-end;padding:8px 0}.pdf-export-btn{display:inline-flex;align-items:center;gap:8px;padding:8px 20px;border-radius:10px;border:1px solid var(--border-color);background:#fff;color:var(--text-secondary);font-size:.88rem;font-weight:600;cursor:pointer;transition:all .2s}.pdf-export-btn:hover:not(:disabled){background:var(--primary-color);color:#fff;border-color:var(--primary-color);box-shadow:0 2px 12px #ff8a654d}.pdf-export-btn:disabled{opacity:.7;cursor:not-allowed}.pdf-export-btn.exporting{background:#fff5f2;border-color:var(--primary-color);color:var(--primary-color)}.pdf-export-spinner{display:inline-block;width:14px;height:14px;border:2px solid rgba(255,138,101,.3);border-top-color:var(--primary-color);border-radius:50%;animation:pdfSpin .6s linear infinite}@keyframes pdfSpin{to{transform:rotate(360deg)}}.quiz-container{display:flex;flex-direction:column;gap:25px;width:100%}.quiz-card-premium{background-color:var(--surface-color);border-radius:var(--border-radius-lg);padding:40px;box-shadow:var(--shadow-light);border:1px solid rgba(0,0,0,.03);transition:all .3s ease}.quiz-card-premium:hover{box-shadow:var(--shadow-medium)}.quiz-badge-premium{padding:6px 16px;border-radius:30px;font-size:var(--text-sm);font-weight:var(--weight-bold);display:inline-flex;align-items:center;gap:6px;margin-bottom:25px}.quiz-question-text-premium{font-size:var(--text-xl);font-weight:var(--weight-bold);color:var(--text-primary);margin-bottom:35px;line-height:var(--leading-snug)}.quiz-options-grid{display:flex;flex-direction:column;gap:5px}.quiz-opt-item-premium{padding:10px 20px;border:2px solid #f1f3f5;border-radius:12px;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;gap:12px}.quiz-opt-item-premium p{margin:0!important}.quiz-opt-item-premium:hover{border-color:var(--primary-color);background-color:#fffaf9;transform:translate(5px)}.quiz-opt-item-premium.selected-premium{border-color:var(--primary-color);background-color:#fff7f5;box-shadow:0 0 0 1px var(--primary-color)}.quiz-opt-item-premium.selected-premium.correct-premium{border-color:#10b981;background-color:#f0fdf4}.quiz-opt-item-premium.selected-premium.incorrect-premium{border-color:#ef4444;background-color:#fef2f2}.quiz-opt-key-premium{font-weight:800;color:var(--text-tertiary);font-size:1.1rem}.quiz-opt-item-premium.selected-premium .quiz-opt-key-premium{color:inherit}.quiz-explanation-area-premium{margin-top:30px;padding:25px;background-color:#f8fafc;border-radius:16px;border-left:4px solid var(--primary-color)}@media(max-width:768px){.container{padding:16px}.top-nav{padding:12px 16px;gap:8px}.nav-logo img{height:36px!important}.nav-logo>div>span:first-child{font-size:1.1rem!important}.nav-logo>div>span:last-child{font-size:.6rem!important}.nav-links{display:none}.nav-links.mobile-open{display:flex;flex-direction:column;position:absolute;top:100%;left:0;right:0;background:var(--surface-color);box-shadow:var(--shadow-medium);padding:12px 16px;gap:4px;z-index:200;border-top:1px solid var(--border-color)}.nav-links.mobile-open .nav-item{padding:12px 16px;border-radius:12px;width:100%;text-align:left}.mobile-menu-btn{display:flex!important}.tab-nav{gap:8px;padding:12px 0;margin-bottom:20px;justify-content:center;flex-wrap:nowrap}.tab-icon{width:68px;height:68px;border-radius:18px}.tab-icon img{width:48px!important;height:48px!important}.tab-btn{font-size:.78em;gap:6px;min-width:0;flex:1;max-width:90px}.card{padding:1.2em;border-radius:var(--border-radius-md)}.quiz-card-premium{padding:20px}.quiz-question-text-premium{font-size:var(--text-md);margin-bottom:20px}.quiz-badge-premium{font-size:var(--text-xs);margin-bottom:16px}.quiz-explanation-area-premium{padding:16px;margin-top:20px}.slide-content{padding:20px!important}.slide-toolbar{padding:8px 12px}.slide-nav-arrow{width:40px;height:40px}.slide-notes-panel{max-height:250px;overflow-y:auto}.pdf-export-btn{font-size:.8rem;padding:6px 14px}.history-header{flex-direction:column;gap:12px}input,select,textarea{padding:12px 14px}.markdown-body{font-size:var(--text-base)}.home-hero-subtitle{font-size:var(--text-xs)!important}.home-hero-features{flex-wrap:nowrap;gap:4px!important;justify-content:center}.home-hero-features span{font-size:var(--text-xs)!important;white-space:nowrap}.generate-btn{border-radius:var(--border-radius-md)!important;padding:14px 24px!important;font-size:var(--text-base)!important;box-shadow:0 4px 16px #ff8a6559!important}.home-step-grid{grid-template-columns:1fr!important;gap:20px!important}.course-result-header{flex-direction:column;gap:12px;align-items:flex-start!important}.course-result-actions{width:100%;flex-wrap:wrap}.course-result-actions button{flex:1;min-width:0;font-size:.85rem}.profiler-grid{grid-template-columns:1fr!important}.loading-progress-card{min-width:0!important;width:100%;padding:16px 20px!important}.loading-container{padding:30px 20px!important}.loading-title{font-size:var(--text-xl)!important}.loading-animation{width:80px!important;height:80px!important;margin-bottom:24px!important}.loading-timeline{gap:0}.timeline-line{height:14px}.timeline-dot{width:24px;height:24px}.timeline-dot .MuiSvgIcon-root{font-size:1.05rem!important}.timeline-label{font-size:var(--text-xs);line-height:24px}.login-card{padding:28px 20px!important}.login-logo-title{font-size:var(--text-xl)!important}.dialog{width:calc(100vw - 32px)}.announcement-bar{font-size:.8rem;padding:8px 12px}.mindmap-container{height:82vh!important}.mindmap-zoom-btn{width:40px!important;height:40px!important;padding:0!important;aspect-ratio:1!important}}@media(max-width:480px){.container{padding:12px}.top-nav{padding:10px 12px}.card{padding:1em;border-radius:12px}.tab-nav{gap:6px}.tab-icon{width:62px;height:62px;border-radius:16px}.tab-icon img{width:42px!important;height:42px!important}.tab-btn{font-size:.7em}.home-hero-title{font-size:var(--text-4xl)!important;margin-top:12px!important}.quiz-card-premium{padding:16px}.quiz-question-text-premium{font-size:var(--text-base)}.slide-content{padding:14px!important}.slide-nav-arrow{width:38px;height:38px}.mindmap-container{height:78vh!important}.loading-container{padding:24px 14px!important}}.mobile-menu-btn{display:none;align-items:center;justify-content:center;width:40px;height:40px;border:none;background:var(--input-bg);border-radius:10px;cursor:pointer;font-size:1.4rem;color:var(--text-primary);box-shadow:none;padding:0;transition:background .2s}.mobile-menu-btn:hover{background:var(--border-color);transform:none}.logout-btn:hover{border-color:#d32f2f!important;color:#d32f2f!important}@supports (padding-bottom: env(safe-area-inset-bottom)){.top-nav{padding-top:max(12px,env(safe-area-inset-top))}.container{padding-bottom:max(16px,env(safe-area-inset-bottom))}}@media(pointer:coarse){.nav-item{min-height:44px;display:flex;align-items:center}.quiz-opt-item-premium{min-height:48px}.slide-dot{width:12px;height:12px}button:hover,.history-card:hover{transform:none}}