@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700;800;900&family=Sora:wght@400;500;600;700;800&display=swap");:root{--font-heading:"Sora",sans-serif;--font-body:"Poppins",sans-serif;--radius-sm:8px;--radius-md:14px;--radius-lg:20px;--radius-xl:28px;--transition:0.3s cubic-bezier(0.4,0,0.2,1)}[data-theme=dark]{--bg-primary:#0f0b1e;--bg-secondary:#15112a;--bg-card:#1c1535;--bg-card-hover:#251f45;--bg-input:#120e24;--text-primary:#f0edff;--text-secondary:#9992b8;--text-muted:#5c5580;--accent:#a855f7;--accent-hover:#c084fc;--accent-muted:rgba(168,85,247,.1);--accent-glow:rgba(168,85,247,.2);--warm:#f59e0b;--warm-hover:#fbbf24;--warm-muted:rgba(245,158,11,.1);--warm-glow:rgba(245,158,11,.15);--success:#22c55e;--warning:#f59e0b;--danger:#ef4444;--border:rgba(168,85,247,.08);--border-hover:rgba(168,85,247,.25);--shadow-sm:0 2px 8px rgba(0,0,0,.3);--shadow-md:0 12px 40px rgba(0,0,0,.4);--shadow-glow:0 8px 40px rgba(168,85,247,.1);--gradient-primary:linear-gradient(135deg,#a855f7,#ec4899);--gradient-warm:linear-gradient(135deg,#f59e0b,#ef4444);--gradient-hero:radial-gradient(ellipse at top right,#1a1040 0%,#0f0b1e 60%);--navbar-bg:rgba(15,11,30,.85)}[data-theme=light]{--bg-primary:#faf8ff;--bg-secondary:#fff;--bg-card:#fff;--bg-card-hover:#f3f0ff;--bg-input:#f3f0ff;--text-primary:#1a1035;--text-secondary:#555080;--text-muted:#9590b5;--accent:#7c3aed;--accent-hover:#8b5cf6;--accent-muted:rgba(124,58,237,.06);--accent-glow:rgba(124,58,237,.12);--warm:#d97706;--warm-hover:#f59e0b;--warm-muted:rgba(217,119,6,.06);--warm-glow:rgba(217,119,6,.08);--success:#16a34a;--warning:#d97706;--danger:#dc2626;--border:rgba(124,58,237,.08);--border-hover:rgba(124,58,237,.2);--shadow-sm:0 2px 8px rgba(0,0,0,.04);--shadow-md:0 12px 40px rgba(0,0,0,.06);--shadow-glow:0 8px 40px rgba(124,58,237,.05);--gradient-primary:linear-gradient(135deg,#7c3aed,#db2777);--gradient-warm:linear-gradient(135deg,#d97706,#dc2626);--gradient-hero:radial-gradient(ellipse at top right,#ede8ff 0%,#faf8ff 60%);--navbar-bg:rgba(250,248,255,.9)}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:var(--font-body);background:var(--bg-primary);color:var(--text-primary);line-height:1.6;min-height:100vh;-webkit-font-smoothing:antialiased;transition:background var(--transition),color var(--transition)}h1,h2,h3,h4{font-family:var(--font-heading)}a{color:inherit;text-decoration:none}button{cursor:pointer;border:none}button,input,select,textarea{font-family:var(--font-body);outline:none}.theme-toggle{width:40px;height:40px;border-radius:var(--radius-md);background:var(--bg-card);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:1.1rem;transition:all var(--transition)}.theme-toggle:hover{border-color:var(--accent);background:var(--accent-muted);transform:scale(1.1)}.navbar{position:fixed;top:0;left:0;right:0;z-index:100;padding:0 40px;height:64px;justify-content:space-between;background:var(--navbar-bg);-webkit-backdrop-filter:blur(24px);backdrop-filter:blur(24px);border-bottom:1px solid var(--border);transition:background var(--transition)}.navbar,.navbar-logo{display:flex;align-items:center}.navbar-logo{gap:10px;font-family:var(--font-heading);font-size:1.25rem;font-weight:800}.navbar-logo span{background:var(--gradient-primary);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.navbar-links{display:flex;gap:6px;align-items:center}.navbar-links a{color:var(--text-secondary);font-weight:600;font-size:.88rem;transition:all var(--transition);padding:8px 16px;border-radius:var(--radius-sm)}.navbar-links a:hover{color:var(--text-primary);background:var(--accent-muted)}.navbar-actions{display:flex;gap:10px;align-items:center}.btn{padding:10px 22px;border-radius:var(--radius-sm);font-weight:600;font-size:.9rem;transition:all var(--transition);display:inline-flex;align-items:center;gap:8px}.btn-primary{background:var(--gradient-primary);color:#fff;box-shadow:0 4px 20px var(--accent-glow)}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 30px var(--accent-glow)}.btn-secondary{background:var(--bg-card);color:var(--text-primary);border:1px solid var(--border)}.btn-secondary:hover{border-color:var(--border-hover);background:var(--bg-card-hover)}.btn-ghost{background:transparent;color:var(--text-secondary);padding:8px 16px}.btn-ghost:hover{color:var(--text-primary);background:var(--accent-muted)}.btn-danger{background:rgba(239,68,68,.1);color:var(--danger);border:1px solid rgba(239,68,68,.2)}.btn-success{background:rgba(34,197,94,.1);color:var(--success);border:1px solid rgba(34,197,94,.2)}.btn-lg{padding:14px 32px;font-size:1rem;border-radius:var(--radius-md)}.btn-sm{padding:6px 14px;font-size:.82rem}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important}.hero{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:120px 40px 80px;background:var(--gradient-hero);position:relative;overflow:hidden}.hero:before{width:500px;height:500px;background:radial-gradient(circle,var(--accent-glow) 0,transparent 70%);top:25%;left:60%;transform:translate(-50%,-50%);animation:pulse 5s ease-in-out infinite}.hero:after,.hero:before{content:"";position:absolute;pointer-events:none}.hero:after{width:350px;height:350px;background:radial-gradient(circle,var(--warm-glow) 0,transparent 70%);bottom:25%;left:25%;animation:pulse 5s ease-in-out 2.5s infinite}@keyframes pulse{0%,to{opacity:.4;transform:translate(-50%,-50%) scale(1)}50%{opacity:.7;transform:translate(-50%,-50%) scale(1.15)}}.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:8px 20px;background:var(--accent-muted);border:1px solid var(--border-hover);border-radius:var(--radius-sm);font-size:.85rem;color:var(--accent-hover);margin-bottom:28px;z-index:1;font-weight:600}.hero h1{font-size:3.6rem;font-weight:800;line-height:1.12;max-width:750px;margin-bottom:20px;z-index:1;letter-spacing:-1px}.hero h1 .gradient-text{background:var(--gradient-primary);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.hero p{font-size:1.1rem;color:var(--text-secondary);max-width:560px;margin-bottom:40px;z-index:1;line-height:1.8}.hero-actions{display:flex;gap:14px;z-index:1}.section{padding:100px 40px;max-width:1180px;margin:0 auto}.section-title{text-align:center;margin-bottom:60px}.section-title h2{font-size:2.5rem;font-weight:800;margin-bottom:14px;letter-spacing:-.5px}.section-title p{color:var(--text-secondary);font-size:1.05rem;max-width:520px;margin:0 auto}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(330px,1fr));grid-gap:20px;gap:20px}.feature-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px;transition:all .4s;position:relative;overflow:hidden}.feature-card:after{content:"";position:absolute;bottom:0;left:0;right:0;height:3px;background:var(--gradient-primary);transform:scaleX(0);transition:transform .4s;transform-origin:left}.feature-card:hover{border-color:var(--border-hover);transform:translateY(-4px);box-shadow:var(--shadow-glow)}.feature-card:hover:after{transform:scaleX(1)}.feature-icon{width:54px;height:54px;border-radius:var(--radius-md);background:var(--accent-muted);display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:18px}.feature-card h3{font-size:1.15rem;font-weight:700;margin-bottom:8px}.feature-card p{color:var(--text-secondary);font-size:.9rem;line-height:1.7}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:40px;background:var(--gradient-hero)}.auth-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-xl);padding:48px;width:100%;max-width:430px;box-shadow:var(--shadow-md)}.auth-card h1{font-size:1.7rem;font-weight:800;margin-bottom:6px;text-align:center}.auth-card .auth-subtitle{color:var(--text-secondary);text-align:center;margin-bottom:32px;font-size:.92rem}.auth-card .btn{width:100%;justify-content:center}.auth-footer{text-align:center;margin-top:24px;color:var(--text-muted);font-size:.86rem}.auth-footer a{color:var(--accent-hover);font-weight:600}.error-message,.form-group{margin-bottom:20px}.form-group label{display:block;font-size:.85rem;font-weight:600;color:var(--text-secondary);margin-bottom:8px}.form-group input,.form-group select,.form-group textarea{width:100%;padding:12px 16px;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);font-size:.92rem;transition:all var(--transition)}.form-group input:focus,.form-group select:focus,.form-group textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-muted)}.form-group input::placeholder,.form-group textarea::placeholder{color:var(--text-muted)}.form-group textarea{min-height:100px;resize:vertical}.dashboard{padding:96px 40px 40px;max-width:1180px;margin:0 auto}.dashboard-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:32px}.dashboard-header h1{font-size:1.8rem;font-weight:800}.stats-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));grid-gap:16px;gap:16px;margin-bottom:32px}.stat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:24px;transition:all var(--transition)}.stat-card:hover{border-color:var(--border-hover)}.stat-card .stat-label{color:var(--text-muted);font-size:.78rem;text-transform:uppercase;letter-spacing:.3px;font-weight:600;margin-bottom:6px}.stat-card .stat-value{font-size:2rem;font-weight:800;font-family:var(--font-heading)}.course-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));grid-gap:16px;gap:16px}.course-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px;transition:all var(--transition);cursor:pointer;position:relative;overflow:hidden}.course-card:before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--gradient-primary)}.course-card:hover{border-color:var(--border-hover);box-shadow:var(--shadow-glow);transform:translateY(-3px)}.course-card h3{font-size:1.1rem;font-weight:700;margin-bottom:6px}.course-card p{color:var(--text-secondary);font-size:.82rem;margin-bottom:16px;line-height:1.6}.course-meta{display:flex;gap:10px;align-items:center;margin-bottom:10px}.course-badge{padding:4px 12px;border-radius:var(--radius-sm);font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.5px}.course-badge.beginner{background:rgba(34,197,94,.1);color:var(--success)}.course-badge.intermediate{background:rgba(245,158,11,.1);color:var(--warning)}.course-badge.advanced{background:rgba(239,68,68,.1);color:var(--danger)}.course-progress{margin-top:12px}.progress-bar{height:6px;background:var(--bg-input);border-radius:3px;overflow:hidden}.progress-fill{height:100%;background:var(--gradient-primary);border-radius:3px;transition:width .4s}.progress-text{color:var(--text-muted);font-size:.78rem;margin-top:6px;text-align:right;font-weight:600}.generate-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:40px;margin-bottom:28px;text-align:center;position:relative;overflow:hidden}.generate-card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:var(--gradient-primary)}.generate-card h2{margin-bottom:8px;font-size:1.4rem}.generate-card p{color:var(--text-secondary);margin-bottom:24px;font-size:.95rem}.lesson-sidebar{width:280px;background:var(--bg-secondary);border-right:1px solid var(--border);padding:96px 0 0;position:fixed;left:0;top:0;bottom:0;overflow-y:auto;transition:background var(--transition)}.lesson-item{padding:14px 20px;border-bottom:1px solid var(--border);cursor:pointer;transition:all var(--transition);display:flex;align-items:center;gap:10px}.lesson-item:hover{background:var(--bg-card)}.lesson-item.active{background:var(--accent-muted);border-left:3px solid var(--accent)}.lesson-item.completed{opacity:.65}.lesson-item .lesson-num{min-width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.78rem;font-weight:700;background:var(--bg-input);border:1px solid var(--border)}.lesson-item.completed .lesson-num{background:rgba(34,197,94,.15);color:var(--success);border-color:rgba(34,197,94,.3)}.lesson-item.active .lesson-num{background:var(--accent);color:#fff;border-color:var(--accent)}.lesson-item .lesson-title{font-size:.82rem;font-weight:500;color:var(--text-secondary)}.lesson-item.active .lesson-title{color:var(--text-primary);font-weight:600}.lesson-content{margin-left:280px;padding:96px 40px 40px;max-width:800px}.lesson-content h2{font-size:1.8rem;font-weight:800;margin-bottom:24px}.lesson-content .content-body{color:var(--text-secondary);line-height:1.9;font-size:.92rem;white-space:pre-wrap}.lesson-content .content-body h2,.lesson-content .content-body h3,.lesson-content .content-body h4{color:var(--text-primary);margin:20px 0 10px}.lesson-content .content-body code{background:var(--bg-input);padding:2px 6px;border-radius:4px;font-size:.88rem}.lesson-content .content-body li{margin-left:20px;margin-bottom:4px}.lesson-nav{display:flex;justify-content:space-between;margin-top:40px;padding-top:24px;border-top:1px solid var(--border)}.lesson-toolbar{display:flex;gap:8px;margin-bottom:20px;flex-wrap:wrap}.share-box{background:var(--bg-card);border:1px solid var(--border-hover);border-radius:var(--radius-md);padding:16px;margin-bottom:20px}.quiz-container{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:36px;margin-top:24px}.quiz-question{margin-bottom:32px}.quiz-question h3{font-size:1.05rem;font-weight:700;margin-bottom:16px;line-height:1.5}.quiz-question .q-num{color:var(--accent);font-weight:800;margin-right:8px}.quiz-options{display:flex;flex-direction:column;gap:10px}.quiz-option{padding:14px 20px;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;transition:all var(--transition);font-size:.92rem}.quiz-option:hover{border-color:var(--border-hover);background:var(--bg-card-hover)}.quiz-option.selected{border-color:var(--accent);background:var(--accent-muted)}.quiz-option.correct{border-color:var(--success);background:rgba(34,197,94,.08);color:var(--success)}.quiz-option.incorrect{border-color:var(--danger);background:rgba(239,68,68,.08);color:var(--danger)}.quiz-explanation{margin-top:12px;padding:14px 18px;background:var(--accent-muted);border:1px solid var(--border-hover);border-radius:var(--radius-sm);font-size:.88rem;color:var(--text-secondary);line-height:1.6}.quiz-score{text-align:center;padding:40px}.quiz-score .score-value{font-size:4rem;font-weight:900;background:var(--gradient-primary);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;font-family:var(--font-heading)}.quiz-score p{color:var(--text-secondary);font-size:1.1rem;margin-top:8px}.chat-container{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;margin-top:24px}.chat-messages{padding:24px;max-height:500px;overflow-y:auto}.chat-message{margin-bottom:16px;display:flex;flex-direction:column}.chat-message.ai{align-items:flex-start}.chat-message.user{align-items:flex-end}.chat-bubble{max-width:80%;padding:14px 20px;border-radius:18px;font-size:.92rem;line-height:1.65}.chat-message.ai .chat-bubble{background:var(--bg-secondary);color:var(--text-secondary);border-bottom-left-radius:4px}.chat-message.user .chat-bubble{background:var(--gradient-primary);color:#fff;border-bottom-right-radius:4px}.chat-input-area{display:flex;gap:10px;padding:16px 20px;border-top:1px solid var(--border)}.chat-input-area input{flex:1 1;padding:12px 16px;background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);font-size:.92rem}.chat-input-area input:focus{border-color:var(--accent)}.chat-input-area input::placeholder{color:var(--text-muted)}.page-container{padding:96px 40px 40px;max-width:850px;margin:0 auto}.page-container h1{font-size:2rem;font-weight:800;margin-bottom:8px}.page-container .subtitle{color:var(--text-secondary);margin-bottom:32px}.loading-spinner{width:24px;height:24px;border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(1turn)}}.loading-overlay{display:flex;align-items:center;justify-content:center;gap:12px;padding:40px;color:var(--text-secondary)}.footer{padding:60px 40px;border-top:1px solid var(--border);text-align:center}.footer p{color:var(--text-muted);font-size:.88rem}.section-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px;margin-bottom:20px}.section-card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.section-card-header h2{font-size:1.2rem;font-weight:700}.streak-card{position:relative;overflow:hidden}.streak-card:after{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#f59e0b,#ef4444,#f59e0b);animation:streakGlow 2s ease-in-out infinite}@keyframes streakGlow{0%,to{opacity:.5}50%{opacity:1}}.week-dots{display:flex;gap:6px;margin-top:12px}.week-dot{width:28px;height:28px;border-radius:50%;background:var(--bg-input);border:1px solid var(--border);display:flex;align-items:center;justify-content:center;font-size:.65rem;font-weight:700;color:var(--text-muted);transition:all var(--transition)}.week-dot.active{background:var(--warm);border-color:var(--warm);color:#fff;box-shadow:0 0 12px var(--warm-glow)}.badge-count{font-size:.85rem;color:var(--accent);font-weight:700}.badges-grid{display:flex;flex-wrap:wrap;gap:12px}.badge-item{display:flex;flex-direction:column;align-items:center;gap:6px;padding:14px 12px;border-radius:var(--radius-md);background:var(--bg-input);border:1px solid var(--border);min-width:90px;transition:all var(--transition)}.badge-item.earned{border-color:var(--accent);background:var(--accent-muted);box-shadow:0 0 20px var(--accent-glow)}.badge-item.locked{opacity:.4;filter:grayscale(.8)}.badge-icon{font-size:1.6rem}.badge-name{font-size:.72rem;font-weight:600;text-align:center;color:var(--text-secondary)}.badge-item.earned .badge-name{color:var(--text-primary)}.badge-popup{position:fixed;inset:0;z-index:200;background:rgba(0,0,0,.6);display:flex;align-items:center;justify-content:center;animation:fadeIn .3s}.badge-popup-content{background:var(--bg-card);border:1px solid var(--border-hover);border-radius:var(--radius-xl);padding:40px;text-align:center;max-width:400px;animation:popIn .4s cubic-bezier(.34,1.56,.64,1)}.badge-popup-content h2{font-size:1.4rem;margin-bottom:20px}.badge-popup-item{display:flex;align-items:center;gap:14px;padding:12px;background:var(--accent-muted);border-radius:var(--radius-md);margin-bottom:16px;text-align:left}.badge-popup-item p{color:var(--text-secondary);font-size:.85rem}.badge-icon-large{font-size:2.5rem}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes popIn{0%{opacity:0;transform:scale(.8)}to{opacity:1;transform:scale(1)}}.report-content{padding:24px;line-height:1.8;font-size:.92rem;color:var(--text-secondary)}.goal-form,.report-content{background:var(--bg-input);border-radius:var(--radius-md)}.goal-form{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:16px;padding:16px}.goals-list{display:flex;flex-direction:column;gap:10px}.goal-item{display:flex;align-items:center;gap:14px;padding:14px 16px;background:var(--bg-input);border-radius:var(--radius-sm);transition:all var(--transition)}.goal-item.completed{opacity:.6}.goal-info{min-width:140px}.goal-title{font-size:.88rem;font-weight:600}.goal-detail{font-size:.75rem;color:var(--text-muted);display:block}.goal-pct{font-size:.82rem;font-weight:700;color:var(--accent);min-width:36px;text-align:right}.bookmarks-list{display:flex;flex-direction:column;gap:8px}.bookmark-item{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;background:var(--bg-input);border-radius:var(--radius-sm);transition:all var(--transition)}.bookmark-item:hover{background:var(--bg-card-hover)}.bookmark-info{display:flex;align-items:center;gap:12px}.bookmark-type{font-size:1.2rem}.search-filter-bar{display:flex;gap:12px;margin-bottom:20px;flex-wrap:wrap}.search-input{flex:1 1;min-width:200px;padding:12px 16px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);font-size:.92rem;transition:border-color var(--transition)}.search-input:focus{border-color:var(--accent);outline:none}.search-input::placeholder{color:var(--text-muted)}.filter-select{padding:12px 16px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);font-size:.92rem}.flashcard-review{max-width:600px;margin:0 auto}.flashcard-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.flashcard-progress-text{text-align:center;color:var(--text-muted);font-weight:600;margin-bottom:20px;font-size:.9rem}.flashcard-flip{perspective:1000px;cursor:pointer;height:300px;margin-bottom:24px}.flashcard-inner{position:relative;width:100%;height:100%;transition:transform .6s cubic-bezier(.4,0,.2,1);transform-style:preserve-3d}.flashcard-flip.flipped .flashcard-inner{transform:rotateY(180deg)}.flashcard-back,.flashcard-front{position:absolute;inset:0;-webkit-backface-visibility:hidden;backface-visibility:hidden;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px;border-radius:var(--radius-lg);background:var(--bg-card);border:1px solid var(--border);text-align:center}.flashcard-back{transform:rotateY(180deg);background:var(--accent-muted);border-color:var(--accent)}.flashcard-label{font-size:.7rem;font-weight:700;text-transform:uppercase;letter-spacing:1.5px;color:var(--accent);margin-bottom:16px}.flashcard-back p,.flashcard-front p{font-size:1.15rem;line-height:1.6;font-weight:500}.flashcard-hint{position:absolute;bottom:16px;font-size:.75rem;color:var(--text-muted)}.flashcard-nav{display:flex;justify-content:space-between;gap:16px}.quiz-history-list{display:flex;flex-direction:column;gap:10px}.quiz-history-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-md);padding:20px;cursor:pointer;transition:all var(--transition)}.quiz-history-item:hover{border-color:var(--border-hover)}.quiz-history-header{display:flex;justify-content:space-between;align-items:center}.quiz-history-info h3{font-size:1rem;font-weight:700;margin-bottom:4px}.quiz-history-date{font-size:.8rem;color:var(--text-muted)}.quiz-history-score{padding:6px 16px;border-radius:var(--radius-sm);font-weight:700;font-size:.88rem}.quiz-history-score.high{background:rgba(34,197,94,.1);color:var(--success)}.quiz-history-score.medium{background:rgba(245,158,11,.1);color:var(--warning)}.quiz-history-score.low{background:rgba(239,68,68,.1);color:var(--danger)}.quiz-history-details{margin-top:16px;padding-top:16px;border-top:1px solid var(--border)}.quiz-history-question{margin-bottom:12px;padding:10px;background:var(--bg-input);border-radius:var(--radius-sm);font-size:.88rem}.quiz-history-question p{margin-bottom:4px}.correct-answer{color:var(--success);font-weight:600}.wrong-answer{color:var(--danger);font-weight:600}.topic-stats-grid{display:flex;flex-direction:column;gap:14px}.topic-stat-item{display:flex;flex-direction:column;gap:6px}.topic-stat-header{display:flex;justify-content:space-between;align-items:center}.topic-stat-name{font-weight:600;font-size:.9rem}.topic-stat-score{font-weight:700;font-size:.88rem;color:var(--accent)}.topic-stat-count{font-size:.75rem;color:var(--text-muted)}.notes-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));grid-gap:16px;gap:16px}.note-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;cursor:pointer;transition:all var(--transition)}.note-card:hover{border-color:var(--border-hover);transform:translateY(-2px);box-shadow:var(--shadow-glow)}.note-card h3{font-size:1.05rem;font-weight:700;margin-bottom:8px}.note-card p{color:var(--text-secondary);font-size:.85rem;line-height:1.5;margin-bottom:12px}.note-card-footer{display:flex;justify-content:space-between;align-items:center;font-size:.78rem;color:var(--text-muted)}.note-viewer{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px}.note-content{color:var(--text-secondary);line-height:1.9;font-size:.92rem}.note-content h2,.note-content h3,.note-content h4{color:var(--text-primary);margin:20px 0 10px}.note-content li{margin-left:20px;margin-bottom:4px}.profile-card{text-align:center;padding:40px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);margin-bottom:24px}.profile-avatar{width:80px;height:80px;border-radius:50%;background:var(--gradient-primary);display:flex;align-items:center;justify-content:center;margin:0 auto 16px;font-size:2rem;font-weight:800;color:#fff;font-family:var(--font-heading)}.profile-form{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px}.success-message{background:rgba(34,197,94,.08);border:1px solid rgba(34,197,94,.15);color:var(--success);border-radius:var(--radius-sm)}.error-message,.success-message{padding:12px 16px;font-size:.88rem}.error-message{background:rgba(239,68,68,.08);border:1px solid rgba(239,68,68,.15);color:var(--danger);border-radius:var(--radius-sm)}.hamburger-btn{display:none;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);font-size:1.3rem;width:40px;height:40px;align-items:center;justify-content:center;cursor:pointer}.mobile-menu{position:fixed;top:64px;left:0;right:0;background:var(--bg-secondary);border-bottom:1px solid var(--border);z-index:99;display:flex;flex-direction:column;padding:12px 20px;animation:slideDown .2s}.mobile-menu a{padding:12px 16px;border-radius:var(--radius-sm);color:var(--text-secondary);font-weight:600;font-size:.9rem;transition:all var(--transition)}.mobile-menu a:hover{background:var(--accent-muted);color:var(--text-primary)}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}@media (max-width:768px){.navbar{padding:0 20px}.navbar-links{display:none}.hamburger-btn{display:flex}.hero{padding:100px 20px 60px}.hero h1{font-size:2.4rem}.hero-actions{flex-direction:column;width:100%}.section{padding:60px 20px}.features-grid{grid-template-columns:1fr}.dashboard,.page-container{padding:80px 20px 20px}.lesson-sidebar{display:none}.lesson-content{margin-left:0;padding:80px 20px 20px}.auth-card{padding:32px 24px}.stats-grid{grid-template-columns:1fr 1fr!important}.badges-grid{justify-content:center}.goal-form{flex-direction:column}.goal-item{flex-wrap:wrap}.flashcard-flip{height:250px}.quiz-history-header{flex-direction:column;gap:8px;align-items:flex-start}.notes-grid{grid-template-columns:1fr}.lesson-toolbar,.search-filter-bar{flex-direction:column}.pricing-card.premium{transform:scale(1) translateY(0);box-shadow:var(--shadow-sm)}.pricing-card.premium:hover{transform:translateY(-5px)}}.pricing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));grid-gap:32px;gap:32px;max-width:1000px;margin:0 auto;padding:32px 16px}.pricing-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-xl);padding:40px 32px;display:flex;flex-direction:column;transition:all var(--transition);position:relative;box-shadow:var(--shadow-sm)}.pricing-card:hover{border-color:var(--accent);box-shadow:var(--shadow-md);transform:translateY(-5px)}.pricing-card.premium{background:var(--bg-card);border:2px solid var(--accent);box-shadow:var(--shadow-glow);transform:scale(1.05);z-index:10}.pricing-card.premium:hover{transform:scale(1.05) translateY(-5px);box-shadow:0 16px 40px rgba(168,85,247,.2)}.pricing-badge{position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:var(--gradient-primary);color:#fff;padding:6px 16px;border-radius:20px;font-size:.8rem;font-weight:800;text-transform:uppercase;letter-spacing:1px;box-shadow:0 4px 12px var(--accent-glow);white-space:nowrap}.pricing-price{font-size:3.5rem;font-family:var(--font-heading);font-weight:900;margin:16px 0;color:var(--text-primary);line-height:1}.pricing-price span{font-size:1rem;color:var(--text-muted);font-family:var(--font-body);font-weight:600;margin-left:4px}.pricing-list{list-style:none;margin:0 0 32px;padding:0;flex:1 1}.pricing-list li{display:flex;align-items:center;gap:12px;margin-bottom:16px;color:var(--text-secondary);font-size:1rem}.pricing-list li.highlight{color:var(--text-primary);font-weight:700}