@import"https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700;800;900&display=swap";:root{--bg-primary: #070712;--bg-secondary: #0f1026;--bg-card: rgba(22, 23, 51, .65);--bg-card-hover: rgba(30, 32, 74, .85);--text-primary: #ffffff;--text-secondary: #a3a3d6;--text-muted: #6b6b99;--accent-1: #00f5ff;--accent-2: #00b8ff;--accent-3: #ff9f1c;--accent-4: #00e676;--accent-5: #ff2a5f;--accent-6: #ef4444;--gradient-1: linear-gradient(135deg, #0f172a 0%, #090915 100%);--gradient-2: linear-gradient(135deg, #00f5ff 0%, #0055ff 100%);--gradient-3: linear-gradient(135deg, #ff9f1c 0%, #ff4500 100%);--gradient-fun: linear-gradient(135deg, #00f5ff 0%, #00e676 100%);--shadow-glow: 0 0 20px rgba(0, 245, 255, .25);--shadow-card: 0 8px 32px rgba(0, 0, 0, .4);--shadow-hover: 0 12px 48px rgba(0, 245, 255, .15);--radius-sm: 8px;--radius-md: 16px;--radius-lg: 24px;--radius-xl: 32px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Nunito,-apple-system,BlinkMacSystemFont,sans-serif;background:var(--bg-primary);color:var(--text-primary);min-height:100vh;overflow-x:hidden}body:before{content:"";position:fixed;inset:0;background:radial-gradient(circle at 15% 15%,rgba(0,245,255,.08) 0%,transparent 50%),radial-gradient(circle at 85% 85%,rgba(0,85,255,.08) 0%,transparent 50%),radial-gradient(circle at 50% 50%,rgba(255,159,28,.03) 0%,transparent 50%);pointer-events:none;z-index:0}#root{position:relative;z-index:1;min-height:100vh}.app-container{max-width:1200px;margin:0 auto;padding:20px;min-height:100vh}.app-header{text-align:center;padding:40px 20px 30px;position:relative}.app-logo{font-size:3rem;font-weight:900;background:var(--gradient-2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:8px;letter-spacing:-1px}.app-subtitle{color:var(--text-secondary);font-size:1.1rem;font-weight:600}.breadcrumb{display:flex;align-items:center;gap:8px;padding:12px 20px;background:var(--bg-secondary);border-radius:var(--radius-md);margin-bottom:24px;flex-wrap:wrap}.breadcrumb a{color:var(--accent-1);text-decoration:none;font-weight:600;font-size:.95rem;transition:color .2s}.breadcrumb a:hover{color:var(--accent-3)}.breadcrumb span.separator{color:var(--text-muted);font-size:.85rem}.breadcrumb .current{color:var(--text-secondary);font-weight:600;font-size:.95rem}.back-btn{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;background:var(--bg-card);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-md);color:var(--text-secondary);font-family:inherit;font-size:.95rem;font-weight:600;cursor:pointer;text-decoration:none;transition:all .3s;margin-bottom:24px}.back-btn:hover{background:var(--bg-card-hover);color:var(--text-primary);transform:translate(-4px)}.page-title{font-size:2rem;font-weight:800;margin-bottom:8px}.page-description{color:var(--text-secondary);font-size:1.05rem;margin-bottom:32px}.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:20px}.card-grid.subjects{grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:24px}.card-grid.lessons{grid-template-columns:1fr;max-width:800px}.card{background:var(--bg-card);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid rgba(0,245,255,.15);border-radius:var(--radius-lg);padding:28px 24px;cursor:pointer;position:relative;overflow:hidden;transition:all .4s cubic-bezier(.165,.84,.44,1)}.card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;border-radius:var(--radius-lg) var(--radius-lg) 0 0;opacity:0;transition:opacity .3s}.card:hover{background:var(--bg-card-hover);border-color:#00f5ff80;transform:translateY(-6px) scale(1.02);box-shadow:0 12px 32px #00f5ff26,0 0 20px #00f5ff1a}.card:hover:before{opacity:1}.card-icon{font-size:3rem;margin-bottom:16px;display:block}.card-name{font-size:1.25rem;font-weight:800;margin-bottom:6px}.card-meta{color:var(--text-muted);font-size:.85rem;font-weight:600}.grade-card .card-icon{font-size:4rem}.grade-card .card-number{position:absolute;top:16px;right:20px;font-size:3.5rem;font-weight:900;opacity:.08;line-height:1}.lesson-card{display:flex;align-items:center;gap:20px;padding:20px 24px}.lesson-number{width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.2rem;font-weight:800;flex-shrink:0;color:#fff}.lesson-info{flex:1;min-width:0}.lesson-title{font-size:1.1rem;font-weight:700;margin-bottom:4px}.lesson-summary{color:var(--text-muted);font-size:.85rem;display:-webkit-box;-webkit-line-clamp:2;line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.lesson-status{display:flex;align-items:center;gap:4px;flex-shrink:0}.lesson-status .star{font-size:1.2rem;opacity:.3}.lesson-status .star.earned{opacity:1}.completed-badge{background:var(--accent-4);color:#fff;padding:4px 12px;border-radius:20px;font-size:.75rem;font-weight:700}.lesson-page{max-width:800px;margin:0 auto}.lesson-header{text-align:center;margin-bottom:40px}.lesson-header .lesson-icon{font-size:3rem;margin-bottom:12px}.lesson-header h1{font-size:2rem;font-weight:800;margin-bottom:8px}.lesson-header .lesson-subtitle{color:var(--text-secondary);font-size:1rem}.content-block{background:var(--bg-card);border:1px solid rgba(255,255,255,.06);border-radius:var(--radius-lg);padding:32px;margin-bottom:20px}.content-block.heading{background:var(--bg-secondary)}.content-block h2{font-size:1.4rem;font-weight:800;color:var(--accent-1)}.content-block p{font-size:1.05rem;line-height:1.8;color:var(--text-secondary)}.content-block img{max-width:100%;border-radius:var(--radius-md);margin:16px 0}.theory-content{font-size:1.05rem;line-height:1.9;color:var(--text-secondary)}.theory-content h2{font-size:1.35rem;font-weight:800;color:var(--accent-1);margin:24px 0 12px;padding-bottom:8px;border-bottom:2px solid rgba(0,212,255,.15)}.theory-content h2:first-child{margin-top:0}.theory-content h3{font-size:1.15rem;font-weight:700;color:var(--accent-3);margin:20px 0 10px}.theory-content p{margin-bottom:12px}.theory-content strong{color:var(--text-primary);font-weight:700}.theory-content em{color:var(--accent-5);font-style:normal;font-weight:600}.theory-content ul,.theory-content ol{margin:12px 0;padding-left:24px}.theory-content li{margin-bottom:6px}.theory-content table{width:100%;border-collapse:collapse;margin:16px 0;border-radius:var(--radius-md);overflow:hidden}.theory-content th{background:#00d4ff1f;color:var(--accent-1);padding:10px 16px;font-weight:700;text-align:left;border-bottom:2px solid rgba(0,212,255,.2)}.theory-content td{padding:10px 16px;border-bottom:1px solid rgba(255,255,255,.06)}.theory-content tr:hover td{background:#ffffff08}.theory-content .rule-box{background:#7c3aed1a;border:1px solid rgba(124,58,237,.25);border-left:4px solid var(--accent-2);border-radius:var(--radius-md);padding:16px 20px;margin:16px 0}.theory-content .example-box{background:#10b98114;border:1px solid rgba(16,185,129,.2);border-left:4px solid var(--accent-4);border-radius:var(--radius-md);padding:16px 20px;margin:16px 0}.theory-content .tip-box{background:#f59e0b14;border:1px solid rgba(245,158,11,.2);border-left:4px solid var(--accent-3);border-radius:var(--radius-md);padding:16px 20px;margin:16px 0}.theory-content .correct-text{color:var(--accent-4);font-weight:700}.theory-content .wrong-text{color:var(--accent-6);text-decoration:line-through;font-weight:600}.lesson-tabs{display:flex;gap:8px;margin-bottom:24px;padding:4px;background:var(--bg-secondary);border-radius:var(--radius-lg);overflow-x:auto}.tab-btn{flex:1;min-width:fit-content;padding:12px 20px;border:none;border-radius:var(--radius-md);background:transparent;color:var(--text-secondary);font-family:inherit;font-size:.95rem;font-weight:700;cursor:pointer;transition:all .3s;display:flex;align-items:center;justify-content:center;gap:8px;white-space:nowrap}.tab-btn:hover{color:var(--text-primary);background:#ffffff0d}.tab-btn.active{background:var(--bg-card);color:var(--text-primary);box-shadow:0 2px 8px #0003}.tab-badge{font-size:.7rem;padding:2px 8px;border-radius:10px;background:#00d4ff33;color:var(--accent-1);font-weight:800}.tab-badge.done{background:#10b98133;color:var(--accent-4)}.page-images-container{display:flex;flex-direction:column;gap:16px}.page-image-wrapper{background:#fff;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-card);position:relative}.page-label{position:absolute;top:12px;right:12px;background:#0009;color:#fff;padding:4px 12px;border-radius:20px;font-size:.75rem;font-weight:700;z-index:1;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.page-image{width:100%;height:auto;display:block}.video-section{margin-top:8px}.video-wrapper{position:relative;width:100%;padding-top:56.25%;border-radius:var(--radius-lg);overflow:hidden;background:#000;box-shadow:var(--shadow-card)}.video-wrapper iframe,.video-wrapper>div{position:absolute;top:0;left:0;width:100%;height:100%}.video-tracking{margin-top:16px;background:var(--bg-card);border-radius:var(--radius-lg);padding:20px;border:1px solid rgba(255,255,255,.06)}.video-progress-info{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px;font-weight:700;font-size:.95rem}.video-pct{color:var(--accent-1);font-size:1.2rem}.video-hint{color:var(--text-muted);font-size:.85rem;margin-top:12px;text-align:center}.quiz-section{margin-top:8px}.quiz-result-banner{background:var(--bg-card);border:2px solid rgba(124,58,237,.3);border-radius:var(--radius-lg);padding:20px 24px;margin-bottom:24px;position:sticky;top:8px;z-index:10;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}.result-banner-content{display:flex;align-items:center;gap:16px;flex-wrap:wrap}.result-icon-sm{font-size:2.5rem}.result-title{font-size:1.3rem;font-weight:800}.result-score{color:var(--text-secondary);font-weight:700;font-size:.95rem}.result-actions{display:flex;gap:8px;margin-left:auto}.btn-sm{padding:8px 16px;font-size:.85rem}.btn-lg{padding:16px 36px;font-size:1.1rem}.quiz-all-questions{display:flex;flex-direction:column;gap:16px}.quiz-item{background:var(--bg-card);border:2px solid rgba(255,255,255,.06);border-radius:var(--radius-lg);padding:24px;transition:border-color .3s}.quiz-item.correct{border-color:#10b98180;background:linear-gradient(135deg,var(--bg-card),rgba(16,185,129,.05))}.quiz-item.wrong{border-color:#ef444466;background:linear-gradient(135deg,var(--bg-card),rgba(239,68,68,.05))}.quiz-item-header{display:flex;align-items:center;gap:10px;margin-bottom:12px;flex-wrap:wrap}.quiz-item-num{background:var(--gradient-2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;font-weight:900;font-size:.95rem}.quiz-item-type{color:var(--text-muted);font-size:.8rem;font-weight:700;background:#ffffff0d;padding:2px 10px;border-radius:10px}.quiz-item-points{color:var(--accent-3);font-size:.8rem;font-weight:800;margin-left:auto}.quiz-item-result{font-size:.85rem;font-weight:800;padding:2px 12px;border-radius:10px}.quiz-item-result.correct{background:#10b98133;color:var(--accent-4)}.quiz-item-result.wrong{background:#ef444426;color:var(--accent-6)}.quiz-item-question{font-size:1.1rem;font-weight:700;line-height:1.7;margin-bottom:16px;white-space:pre-line}.quiz-question-image{display:block;max-width:100%;max-height:300px;margin:12px auto 16px;border-radius:var(--radius-md);border:2px solid rgba(255,255,255,.08);box-shadow:0 4px 20px #00000040;object-fit:contain;background:#fff}.quiz-options-grid{display:flex;flex-direction:column;gap:8px}.quiz-opt{display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:var(--radius-md);border:2px solid rgba(255,255,255,.08);background:var(--bg-secondary);cursor:pointer;font-family:inherit;font-size:.95rem;font-weight:600;color:var(--text-primary);text-align:left;transition:all .2s;width:100%}.quiz-opt:hover:not(:disabled):not(.correct):not(.wrong){border-color:var(--accent-1);background:#00d4ff14}.quiz-opt.selected{border-color:var(--accent-1);background:#00d4ff1f}.quiz-opt.correct{border-color:var(--accent-4);background:#10b98126}.quiz-opt.wrong{border-color:var(--accent-6);background:#ef44441f}.quiz-opt:disabled{cursor:default}.opt-label{width:28px;height:28px;border-radius:50%;background:#ffffff14;display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:800;flex-shrink:0;color:var(--text-secondary)}.quiz-opt.selected .opt-label{background:var(--accent-1);color:#fff}.quiz-opt.correct .opt-label{background:var(--accent-4);color:#fff}.quiz-opt.wrong .opt-label{background:var(--accent-6);color:#fff}.opt-text{flex:1}.quiz-tf-buttons{display:flex;gap:12px}.quiz-tf-btn{flex:1;padding:14px 20px;border-radius:var(--radius-md);border:2px solid rgba(255,255,255,.08);background:var(--bg-secondary);cursor:pointer;font-family:inherit;font-size:1rem;font-weight:700;color:var(--text-primary);transition:all .2s}.quiz-tf-btn:hover:not(:disabled):not(.correct):not(.wrong){border-color:var(--accent-1);background:#00d4ff14}.quiz-tf-btn.selected{border-color:var(--accent-1);background:#00d4ff1f}.quiz-tf-btn.correct{border-color:var(--accent-4);background:#10b98126}.quiz-tf-btn.wrong{border-color:var(--accent-6);background:#ef44441f}.quiz-tf-btn:disabled{cursor:default}.quiz-input-wrap{display:flex;flex-direction:column;gap:8px}.quiz-input{width:100%;padding:12px 16px;border-radius:var(--radius-md);border:2px solid rgba(255,255,255,.1);background:var(--bg-secondary);color:var(--text-primary);font-family:inherit;font-size:1rem;font-weight:600;outline:none;transition:border-color .2s}.quiz-input:focus{border-color:var(--accent-1)}.quiz-input:disabled{opacity:.7;cursor:default}.quiz-input.correct{border-color:var(--accent-4)}.quiz-input.wrong{border-color:var(--accent-6)}.quiz-correct-answer{color:var(--accent-4);font-size:.9rem;font-weight:700;padding:4px 0}.quiz-hint-area{margin-top:12px}.quiz-hint-btn{background:none;border:none;color:var(--accent-3);font-family:inherit;font-size:.85rem;font-weight:700;cursor:pointer;padding:4px 0;transition:opacity .2s}.quiz-hint-btn:hover{opacity:.8}.quiz-hint-text{color:var(--accent-3);font-size:.9rem;font-weight:600;padding:8px 14px;margin-top:6px;background:#f59e0b14;border-radius:var(--radius-sm);border-left:3px solid var(--accent-3)}.quiz-explanation{margin-top:12px;padding:10px 14px;background:#00d4ff0f;border-radius:var(--radius-sm);border-left:3px solid var(--accent-1);color:var(--text-secondary);font-size:.9rem;font-weight:600;line-height:1.6}.quiz-submit-bar{display:flex;align-items:center;justify-content:center;gap:20px;margin-top:24px;padding:20px;background:var(--bg-card);border-radius:var(--radius-lg);border:1px solid rgba(255,255,255,.06)}.quiz-submit-info{color:var(--text-muted);font-weight:700;font-size:.95rem}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 28px;border-radius:var(--radius-md);font-family:inherit;font-size:1rem;font-weight:700;cursor:pointer;border:none;transition:all .3s;text-decoration:none}.btn-primary{background:var(--gradient-2);color:#fff;box-shadow:0 4px 15px #00d4ff4d}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 25px #00d4ff66}.btn-secondary{background:var(--bg-card);color:var(--text-primary);border:1px solid rgba(255,255,255,.1)}.btn-secondary:hover{background:var(--bg-card-hover);transform:translateY(-2px)}.progress-bar-wrapper{width:100%;height:8px;background:#ffffff1a;border-radius:4px;overflow:hidden;margin-top:12px}.progress-bar-fill{height:100%;border-radius:4px;background:var(--gradient-2);transition:width .5s ease}.stats-row{display:flex;gap:16px;margin-bottom:32px;flex-wrap:wrap}.stat-card{flex:1;min-width:140px;background:var(--bg-card);border:1px solid rgba(255,255,255,.06);border-radius:var(--radius-lg);padding:20px;text-align:center}.stat-value{font-size:2rem;font-weight:900;background:var(--gradient-2);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.stat-label{color:var(--text-muted);font-size:.8rem;font-weight:700;text-transform:uppercase;letter-spacing:1px;margin-top:4px}.empty-state{text-align:center;padding:60px 20px}.empty-state .empty-icon{font-size:4rem;margin-bottom:16px;opacity:.5}.empty-state h3{font-size:1.3rem;font-weight:700;margin-bottom:8px;color:var(--text-secondary)}.empty-state p{color:var(--text-muted)}.loading{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:80px 20px;gap:16px}.loading-spinner{width:50px;height:50px;border:4px solid rgba(255,255,255,.1);border-top-color:var(--accent-1);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.loading-text{color:var(--text-secondary);font-weight:600}.particles{position:fixed;inset:0;pointer-events:none;z-index:0;overflow:hidden}.particle{position:absolute;border-radius:50%;animation:float linear infinite;opacity:.15}@keyframes float{0%{transform:translateY(100vh) rotate(0);opacity:0}10%{opacity:.25}90%{opacity:.25}to{transform:translateY(-10vh) rotate(720deg);opacity:0}}.particle-star{position:absolute;animation:float linear infinite;line-height:1;-webkit-user-select:none;user-select:none;pointer-events:none}.greeting-banner{display:flex;align-items:center;gap:16px;background:linear-gradient(135deg,#00d4ff1a,#7c3aed1a);border:1px solid rgba(0,212,255,.2);border-radius:var(--radius-lg);padding:20px 24px;margin-bottom:24px;position:relative;overflow:hidden}.greeting-banner:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--accent-1),var(--accent-2),var(--accent-5));border-radius:var(--radius-lg) var(--radius-lg) 0 0}.greeting-emoji{font-size:2.2rem;flex-shrink:0;animation:float-emoji 3s ease-in-out infinite}@keyframes float-emoji{0%,to{transform:translateY(0)}50%{transform:translateY(-6px)}}.greeting-text{font-size:1.25rem;font-weight:800;background:linear-gradient(135deg,var(--accent-1),var(--accent-2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:4px}.greeting-sub{font-size:.9rem;font-weight:600;color:var(--text-secondary)}.greeting-avatar{font-size:2.8rem;margin-left:auto;flex-shrink:0}.resume-card{background:linear-gradient(135deg,#f59e0b14,#fb923c0d);border:1px solid rgba(245,158,11,.3);border-radius:var(--radius-lg);padding:16px 20px;margin-bottom:28px;cursor:pointer;position:relative;overflow:hidden;transition:all .3s ease}.resume-card:hover{transform:translateY(-3px);box-shadow:0 8px 32px #f59e0b33;border-color:#f59e0b80}.resume-card-label{font-size:.7rem;font-weight:800;text-transform:uppercase;letter-spacing:1.5px;color:var(--accent-3);margin-bottom:10px}.resume-card-body{display:flex;align-items:center;gap:14px}.resume-card-icon{width:48px;height:48px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:1.6rem;flex-shrink:0}.resume-card-info{flex:1;min-width:0}.resume-card-subject{font-size:.78rem;font-weight:700;color:var(--text-muted);margin-bottom:2px;text-transform:uppercase;letter-spacing:.5px}.resume-card-title{font-size:1rem;font-weight:800;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.resume-card-stars{font-size:.85rem;margin-top:3px}.resume-card-arrow{font-size:1.4rem;font-weight:900;color:var(--accent-3);flex-shrink:0;transition:transform .2s}.resume-card:hover .resume-card-arrow{transform:translate(5px)}.page-indicator{position:sticky;top:8px;z-index:20;display:inline-flex;align-self:flex-end;background:#000000a6;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);color:#fff;padding:6px 16px;border-radius:20px;font-size:.8rem;font-weight:700;margin-bottom:12px;border:1px solid rgba(255,255,255,.1);margin-left:auto;width:fit-content}.next-lesson-btn{background:linear-gradient(135deg,#10b981,#34d399)!important;box-shadow:0 4px 15px #10b98159!important;max-width:300px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.next-lesson-btn:hover{box-shadow:0 6px 25px #10b98180!important}@media(max-width:768px){.app-container{padding:12px}.app-logo{font-size:2rem}.card-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}.card{padding:20px 16px}.card-icon{font-size:2.5rem}.page-title{font-size:1.5rem}.content-block{padding:20px}.stats-row{gap:8px}}@media(max-width:480px){.card-grid{grid-template-columns:repeat(2,1fr);gap:10px}.lesson-card{flex-direction:column;text-align:center;gap:12px}}.mascot-loading{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:100vh;gap:16px}.mascot-emoji{font-size:5rem;animation:mascotBounce .75s ease-in-out infinite;filter:drop-shadow(0 8px 16px rgba(245,158,11,.4))}@keyframes mascotBounce{0%,to{transform:translateY(0) rotate(-3deg)}50%{transform:translateY(-20px) rotate(3deg)}}.mascot-dots{display:flex;gap:8px}.mascot-dots span{width:10px;height:10px;border-radius:50%;background:var(--accent-1);animation:dotPulse 1.2s ease-in-out infinite}.mascot-dots span:nth-child(2){animation-delay:.2s}.mascot-dots span:nth-child(3){animation-delay:.4s}@keyframes dotPulse{0%,80%,to{transform:scale(.7);opacity:.5}40%{transform:scale(1.2);opacity:1}}.mascot-text{font-size:1.1rem;font-weight:700;color:var(--text-secondary);letter-spacing:.02em}.achievement-overlay{position:fixed;inset:0;background:#000000a6;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);z-index:1000;display:flex;align-items:center;justify-content:center;padding:20px}.achievement-popup{background:var(--bg-card);border:2px solid rgba(245,158,11,.4);border-radius:var(--radius-xl);padding:40px 36px;max-width:380px;width:100%;text-align:center;box-shadow:0 20px 60px #00000080,0 0 40px #f59e0b26}.achievement-big-emoji{font-size:5rem;margin-bottom:16px;display:block}.achievement-title{font-size:1.5rem;font-weight:900;background:linear-gradient(135deg,#f59e0b,#ec4899);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:12px}.achievement-desc{color:var(--text-secondary);font-size:1.05rem;font-weight:600;line-height:1.6;margin-bottom:16px}.achievement-desc strong{color:var(--text-primary);font-weight:800}.achievement-stars{font-size:1.8rem;margin-bottom:24px;letter-spacing:4px}.achievement-btn{width:100%;padding:14px;font-size:1rem}.daily-goal-card{background:var(--bg-card);border:2px solid rgba(0,212,255,.2);border-radius:var(--radius-lg);padding:20px 24px;margin-bottom:16px;position:relative;overflow:hidden}.daily-goal-card:before{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(0,212,255,.05) 0%,transparent 60%);pointer-events:none}.daily-goal-card.completed{border-color:#10b98166;background:linear-gradient(135deg,var(--bg-card),rgba(16,185,129,.06))}.daily-goal-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;flex-wrap:wrap;gap:8px}.daily-goal-title{font-size:1rem;font-weight:800;color:var(--text-primary)}.streak-badge{display:inline-flex;align-items:center;gap:4px;background:#f59e0b26;border:1px solid rgba(245,158,11,.35);color:#f59e0b;font-size:.85rem;font-weight:800;padding:4px 12px;border-radius:20px;box-shadow:0 0 12px #f59e0b33}.daily-goal-done{font-size:1rem;font-weight:800;color:var(--accent-4);text-align:center;padding:8px 0}.goal-items{display:flex;flex-direction:column;gap:12px}.goal-item{display:flex;flex-direction:column;gap:6px}.goal-item-label{display:flex;justify-content:space-between;align-items:center;font-size:.9rem;font-weight:700;color:var(--text-secondary)}.goal-count{font-size:.85rem;font-weight:800;color:var(--accent-1)}.goal-bar{height:10px;background:#ffffff0f;border-radius:10px;overflow:hidden}.goal-bar-fill{height:100%;border-radius:10px;background:linear-gradient(90deg,var(--accent-1),var(--accent-2));box-shadow:0 0 8px #00d4ff66}.goal-bar-fill.quiz{background:linear-gradient(90deg,var(--accent-3),var(--accent-5));box-shadow:0 0 8px #f59e0b66}.study-calendar-card{background:var(--bg-card);border:1px solid rgba(255,255,255,.06);border-radius:var(--radius-lg);padding:12px 14px;margin-bottom:16px;margin-top:24px;opacity:.85;max-width:300px}.study-calendar-title{font-size:.85rem;font-weight:700;margin-bottom:10px;color:var(--text-muted)}.study-cal-grid{display:grid;grid-template-columns:repeat(7,1fr);gap:5px}.cal-day{aspect-ratio:1;border-radius:50%;display:flex;align-items:center;justify-content:center;background:#ffffff0a;transition:transform .15s,box-shadow .15s}.cal-day.empty{background:transparent}.cal-day.has-study{background:linear-gradient(135deg,#10b981,#34d399);box-shadow:0 0 7px #10b98180}.cal-day.today{background:#00d4ff14;box-shadow:0 0 0 2px var(--accent-1),0 0 10px #00d4ff33}.cal-day.has-study.today{background:linear-gradient(135deg,#10b981,#34d399);box-shadow:0 0 0 2px #fff,0 0 12px #10b98199}.cal-day.future{background:transparent;opacity:0;pointer-events:none}.cal-day-num{font-size:.58rem;font-weight:700;color:#fff3;line-height:1;-webkit-user-select:none;user-select:none}.cal-day.has-study .cal-day-num{color:#fff;font-weight:800}.cal-day.today .cal-day-num{color:var(--accent-1);font-weight:900}.cal-day.has-study.today .cal-day-num{color:#fff}.tts-btn{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border:1.5px solid rgba(0,212,255,.3);border-radius:20px;background:#00d4ff14;color:var(--accent-1);font-family:inherit;font-size:.85rem;font-weight:700;cursor:pointer;transition:all .2s}.tts-btn:hover{background:#00d4ff29;border-color:#00d4ff80}.tts-btn.speaking{background:#ef44441f;border-color:#ef444466;color:#ef4444;animation:ttsGlow 1.4s ease-in-out infinite}@keyframes ttsGlow{0%,to{box-shadow:none}50%{box-shadow:0 0 12px #ef44444d}}.bookmark-btn{display:inline-flex;align-items:center;gap:5px;padding:5px 12px;border:1.5px solid rgba(245,158,11,.3);border-radius:20px;background:transparent;color:var(--text-muted);font-family:inherit;font-size:.82rem;font-weight:700;cursor:pointer;transition:all .2s}.bookmark-btn.bookmarked{background:#f59e0b1f;border-color:#f59e0b80;color:#f59e0b}.bookmark-btn:hover{border-color:#f59e0b80;color:#f59e0b}.tts-controls{display:inline-flex;align-items:center;gap:6px}.voice-picker{height:34px;padding:0 10px;border:1.5px solid rgba(0,212,255,.25);border-radius:20px;background:#00d4ff0f;color:var(--text-secondary);font-family:inherit;font-size:.78rem;font-weight:600;cursor:pointer;outline:none;transition:border-color .2s,background .2s;max-width:180px}.voice-picker:hover,.voice-picker:focus{border-color:#00d4ff80;background:#00d4ff1a;color:var(--accent-1)}.voice-picker option{background:#1e1e3a;color:var(--text-primary)}.fullscreen-overlay{position:fixed;inset:0;background:#000000eb;z-index:2000;display:flex;align-items:center;justify-content:center;padding:16px;cursor:zoom-out}.fullscreen-img{max-width:100%;max-height:92vh;object-fit:contain;border-radius:var(--radius-md);box-shadow:0 0 60px #000c}.fullscreen-close{position:fixed;top:16px;right:20px;background:#ffffff26;border:none;border-radius:50%;width:40px;height:40px;font-size:1.3rem;color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);transition:background .2s}.fullscreen-close:hover{background:#ffffff4d}.page-image{cursor:zoom-in}@media(max-width:480px){.study-calendar-card{padding:16px}.cal-day{border-radius:5px}.daily-goal-card{padding:16px}.achievement-popup{padding:28px 20px}}.card-icon-float{display:inline-block;animation:floatIcon 3s ease-in-out infinite alternate;filter:drop-shadow(0 0 12px var(--icon-glow-color, rgba(0, 245, 255, .4)))}@keyframes floatIcon{0%{transform:translateY(0) rotate(0)}50%{transform:translateY(-5px) rotate(1deg)}to{transform:translateY(-10px) rotate(-1deg)}}.card-light-sweep{position:absolute;top:0;left:-100%;width:50%;height:100%;background:linear-gradient(to right,#fff0,#ffffff26,#fff0);transform:skew(-25deg);transition:none;pointer-events:none;z-index:1}.card:hover .card-light-sweep{animation:sweep 1.2s ease-out}@keyframes sweep{0%{left:-100%}to{left:200%}}.neon-progress-container{width:100%;height:6px;background:#ffffff14;border-radius:10px;margin-top:16px;overflow:hidden;position:relative}.neon-progress-bar{height:100%;background:linear-gradient(90deg,var(--accent-1),var(--accent-2));border-radius:10px;box-shadow:0 0 10px var(--progress-glow, rgba(0, 245, 255, .6));transition:width .8s cubic-bezier(.4,0,.2,1)}.card-stars-badge{position:absolute;top:14px;right:14px;display:flex;align-items:center;gap:3px;background:#ff9f1c26;border:1px solid rgba(255,159,28,.3);padding:4px 8px;border-radius:20px;font-size:.8rem;font-weight:800;color:#ff9f1c;box-shadow:0 0 10px #ff9f1c40;z-index:2}.card-sparkles{position:absolute;inset:0;opacity:0;pointer-events:none;transition:opacity .4s ease;background-image:radial-gradient(circle at 20% 30%,rgba(0,245,255,.15) 1.5px,transparent 1.5px),radial-gradient(circle at 75% 40%,rgba(255,159,28,.15) 2px,transparent 2px),radial-gradient(circle at 40% 80%,rgba(0,245,255,.15) 1.5px,transparent 1.5px);background-size:100% 100%;z-index:0}.card:hover .card-sparkles{opacity:1;animation:sparkleRotate 10s linear infinite}.card-grid.subjects .card{padding:38px 28px;min-height:250px;display:flex;flex-direction:column;justify-content:space-between;border-radius:var(--radius-xl);border:1px solid rgba(0,245,255,.18);box-shadow:0 4px 24px #0000004d}.card-grid.subjects .card .card-name{font-size:1.4rem;font-weight:900;margin-top:10px;margin-bottom:8px}.card-grid.subjects .card .card-icon{font-size:4rem;margin-bottom:20px}.card-grid.subjects .card .card-meta{font-size:.95rem;font-weight:700}