@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap";
:root,:root[data-theme=dark]{--bg-app:#12141d;--bg-sidebar:#1a1d2e;--bg-card:#1e2236;--bg-card-alt:#252840;--bg-input:#252840;--bg-hover:#2a2d42;--bg-overlay:#000000a6;--text-primary:#eaeaf2;--text-secondary:#9294a8;--text-muted:#5c5e72;--text-sidebar:#7c7e96;--text-active:#fff;--border:#ffffff12;--border-focus:#6c63ff;--border-card:#ffffff0d;--accent:#6c63ff;--accent-2:#8b7fff;--accent-hover:#5a52e0;--accent-light:#6c63ff26;--accent-glow:#6c63ff40;--success:#4ade80;--success-bg:#4ade801f;--warning:#fbbf24;--warning-bg:#fbbf241f;--danger:#f87171;--danger-bg:#f871711f;--info:#38bdf8;--info-bg:#38bdf81f;--orange:#fb923c;--orange-bg:#fb923c1f;--tag-blue:#3b82f6;--tag-purple:#a855f7;--tag-green:#22c55e;--tag-orange:#f97316;--shadow-sm:0 1px 3px #0000004d;--shadow-md:0 4px 12px #00000059;--shadow-lg:0 8px 24px #00000073;--shadow-xl:0 20px 40px #0000008c;--glow-accent:0 0 20px #6c63ff59;--sidebar-w:220px;--sidebar-w-collapsed:64px;--topbar-h:60px;--r-sm:6px;--r-md:10px;--r-lg:14px;--r-xl:20px;--r-full:9999px}:root[data-theme=light]{--bg-app:#f0f2f8;--bg-sidebar:#1a1d2e;--bg-card:#fff;--bg-card-alt:#f5f6fa;--bg-input:#f5f6fa;--bg-hover:#eceef5;--bg-overlay:#00000080;--text-primary:#1a1d2e;--text-secondary:#5c607a;--text-muted:#9294a8;--text-sidebar:#9294a8;--text-active:#fff;--border:#e5e7f0;--border-focus:#6c63ff;--border-card:#e5e7f0;--accent:#6c63ff;--accent-2:#8b7fff;--accent-hover:#5a52e0;--accent-light:#6c63ff14;--accent-glow:#6c63ff26;--success:#16a34a;--success-bg:#16a34a14;--warning:#d97706;--warning-bg:#d9770614;--danger:#dc2626;--danger-bg:#dc262614;--info:#0284c7;--info-bg:#0284c714;--orange:#ea580c;--orange-bg:#ea580c14;--tag-blue:#2563eb;--tag-purple:#9333ea;--tag-green:#16a34a;--tag-orange:#ea580c;--shadow-sm:0 1px 3px #00000014;--shadow-md:0 4px 12px #0000001a;--shadow-lg:0 8px 24px #0000001f;--shadow-xl:0 20px 40px #00000026;--glow-accent:0 0 20px #6c63ff33}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility}body{background:var(--bg-app);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;min-height:100vh;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;font-size:14px;line-height:1.6;transition:background .3s,color .3s}a{color:inherit;text-decoration:none}button{cursor:pointer;font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif}input,textarea,select{outline:none;font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif}img{max-width:100%;display:block}h1,h2,h3,h4,h5,h6{letter-spacing:-.02em;margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;line-height:1.2}::-webkit-scrollbar{width:5px;height:5px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--bg-hover);border-radius:10px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.app-shell{min-height:100vh;display:flex}.sidebar{width:var(--sidebar-w);background:var(--bg-sidebar);z-index:200;border-right:1px solid var(--border);flex-direction:column;transition:transform .3s cubic-bezier(.4,0,.2,1);display:flex;position:fixed;top:0;bottom:0;left:0;overflow:hidden}.sidebar-logo{border-bottom:1px solid var(--border);flex-shrink:0;align-items:center;gap:10px;padding:20px 18px;display:flex}.sidebar-logo-mark{background:linear-gradient(135deg, var(--accent), var(--accent-2));border-radius:var(--r-md);width:32px;height:32px;box-shadow:var(--glow-accent);flex-shrink:0;justify-content:center;align-items:center;font-size:16px;display:flex}.sidebar-logo-text{color:#fff;letter-spacing:.3px;font-size:14px;font-weight:700}.sidebar-logo-sub{color:var(--text-sidebar);margin-top:1px;font-size:10px}.sidebar-user{border-bottom:1px solid var(--border);flex-shrink:0;align-items:center;gap:10px;padding:14px 18px;display:flex}.sidebar-avatar{background:linear-gradient(135deg, var(--accent), #a78bfa);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:34px;height:34px;font-size:13px;font-weight:700;display:flex}.sidebar-user-name{color:var(--text-primary);white-space:nowrap;text-overflow:ellipsis;font-size:13px;font-weight:600;overflow:hidden}.sidebar-user-role{color:var(--text-sidebar);font-size:11px}.sidebar-nav{flex-direction:column;flex:1;gap:2px;padding:12px 10px;display:flex;overflow-y:auto}.sidebar-section-label{letter-spacing:1px;text-transform:uppercase;color:var(--text-muted);margin-top:4px;padding:8px 10px 4px;font-size:10px;font-weight:700}.sidebar-item{border-radius:var(--r-md);color:var(--text-sidebar);cursor:pointer;align-items:center;gap:10px;padding:9px 10px;font-size:13px;font-weight:500;transition:all .2s;display:flex;position:relative}.sidebar-item:hover{background:var(--bg-hover);color:var(--text-primary)}.sidebar-item.active{background:var(--accent-light);color:var(--accent-2)}.sidebar-item.active:before{content:"";background:var(--accent);border-radius:0 3px 3px 0;width:3px;position:absolute;top:20%;bottom:20%;left:0}.sidebar-icon{flex-shrink:0;justify-content:center;align-items:center;width:18px;height:18px;font-size:15px;display:flex}.sidebar-badge{background:var(--accent);color:#fff;border-radius:var(--r-full);text-align:center;min-width:18px;margin-left:auto;padding:1px 6px;font-size:10px;font-weight:700}.sidebar-footer{border-top:1px solid var(--border);flex-shrink:0;padding:12px 10px}.main-area{margin-left:var(--sidebar-w);flex-direction:column;flex:1;min-width:0;min-height:100vh;display:flex}.topbar{height:var(--topbar-h);background:var(--bg-sidebar);border-bottom:1px solid var(--border);z-index:100;justify-content:space-between;align-items:center;padding:0 24px;display:flex;position:sticky;top:0}.topbar-title{color:var(--text-primary);font-size:15px;font-weight:600}.topbar-right{align-items:center;gap:12px;display:flex}.topbar-btn{border-radius:var(--r-md);background:var(--bg-hover);border:1px solid var(--border);width:34px;height:34px;color:var(--text-secondary);justify-content:center;align-items:center;font-size:15px;transition:all .2s;display:flex}.topbar-btn:hover{background:var(--accent-light);color:var(--accent-2)}.page-content{flex:1;padding:24px;overflow-y:auto}.card{background:var(--bg-card);border:1px solid var(--border-card);border-radius:var(--r-lg);padding:20px;transition:border-color .2s,box-shadow .2s}.card:hover{border-color:var(--border-focus)}.card-flat{background:var(--bg-card-alt);border:none}.card-glass{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#ffffff08;border:1px solid #ffffff14}.course-grid{grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:16px;display:grid}.course-card{background:var(--bg-card);border:1px solid var(--border-card);border-radius:var(--r-lg);cursor:pointer;color:inherit;flex-direction:column;text-decoration:none;transition:all .25s cubic-bezier(.4,0,.2,1);display:flex;overflow:hidden}.course-card:hover{border-color:var(--accent);box-shadow:var(--shadow-lg), 0 0 0 1px var(--accent-light);transform:translateY(-3px)}.course-thumb{aspect-ratio:16/9;background:linear-gradient(135deg,#1a1d30,#2a2d42);position:relative;overflow:hidden}.course-thumb img{object-fit:cover;width:100%;height:100%}.course-thumb-placeholder{background:linear-gradient(135deg, var(--accent-light), #6c63ff0d);justify-content:center;align-items:center;width:100%;height:100%;font-size:2.5rem;display:flex}.course-thumb-overlay{background:linear-gradient(#0000 40%,#000000b3);position:absolute;inset:0}.course-tag{background:var(--accent);color:#fff;border-radius:var(--r-full);letter-spacing:.3px;padding:3px 8px;font-size:10px;font-weight:700;position:absolute;top:10px;left:10px}.course-tag.green{background:var(--tag-green)}.course-tag.orange{background:var(--tag-orange)}.course-tag.blue{background:var(--tag-blue)}.course-progress-bar{background:#ffffff1a;height:3px;position:absolute;bottom:0;left:0;right:0}.course-progress-fill{background:linear-gradient(90deg, var(--accent), var(--accent-2));border-radius:2px;height:100%;transition:width .4s}.course-body{flex-direction:column;flex:1;padding:14px 16px;display:flex}.course-body-tag{color:var(--accent-2);text-transform:uppercase;letter-spacing:.8px;margin-bottom:6px;font-size:10px;font-weight:700}.course-title{color:var(--text-primary);-webkit-line-clamp:2;-webkit-box-orient:vertical;margin-bottom:6px;font-size:14px;font-weight:600;line-height:1.4;display:-webkit-box;overflow:hidden}.course-desc{color:var(--text-secondary);-webkit-line-clamp:2;-webkit-box-orient:vertical;flex:1;margin-bottom:10px;font-size:12px;line-height:1.5;display:-webkit-box;overflow:hidden}.course-meta-row{color:var(--text-secondary);justify-content:space-between;align-items:center;font-size:11px;display:flex}.course-progress-pct{color:var(--accent-2);font-size:11px;font-weight:600}.continue-card{background:var(--bg-card);border:1px solid var(--border-card);border-radius:var(--r-lg);cursor:pointer;color:inherit;align-items:center;gap:14px;padding:16px;text-decoration:none;transition:all .2s;display:flex}.continue-card:hover{border-color:var(--accent);box-shadow:var(--shadow-md);transform:translateY(-1px)}.continue-thumb{border-radius:var(--r-md);background:var(--bg-card-alt);flex-shrink:0;justify-content:center;align-items:center;width:90px;height:64px;font-size:1.5rem;display:flex;overflow:hidden}.continue-thumb img{object-fit:cover;width:100%;height:100%}.continue-info{flex:1;min-width:0}.continue-label{color:var(--accent-2);text-transform:uppercase;letter-spacing:.8px;margin-bottom:4px;font-size:10px;font-weight:700}.continue-title{color:var(--text-primary);white-space:nowrap;text-overflow:ellipsis;margin-bottom:4px;font-size:13px;font-weight:600;overflow:hidden}.continue-subtitle{color:var(--text-secondary);white-space:nowrap;text-overflow:ellipsis;margin-bottom:8px;font-size:11px;overflow:hidden}.progress-bar{background:var(--bg-hover);border-radius:var(--r-full);height:4px;overflow:hidden}.progress-fill{background:linear-gradient(90deg, var(--accent), var(--accent-2));border-radius:var(--r-full);height:100%;transition:width .4s}.continue-play{background:var(--accent);color:#fff;width:36px;height:36px;box-shadow:var(--glow-accent);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:13px;transition:transform .2s;display:flex}.continue-play:hover{transform:scale(1.1)}.deadline-item{border-bottom:1px solid var(--border);align-items:center;gap:12px;padding:10px 0;display:flex}.deadline-item:last-child{border-bottom:none}.deadline-date-box{text-align:center;flex-shrink:0;width:40px}.deadline-month{text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);font-size:9px;font-weight:700}.deadline-day{color:var(--text-primary);font-size:20px;font-weight:800;line-height:1}.deadline-info{flex:1;min-width:0}.deadline-title{color:var(--text-primary);margin-bottom:2px;font-size:12px;font-weight:600}.deadline-time{color:var(--text-secondary);font-size:11px}.deadline-dot{border-radius:50%;flex-shrink:0;width:8px;height:8px}.welcome-banner{border:1px solid var(--border-card);border-radius:var(--r-xl);background:linear-gradient(135deg,#1e2236 0%,#252840 50%,#1a1d30 100%);margin-bottom:24px;padding:24px 28px;position:relative;overflow:hidden}.welcome-banner:before{content:"";background:radial-gradient(circle, var(--accent-glow), transparent 70%);border-radius:50%;width:200px;height:200px;position:absolute;top:-60px;right:-60px}.welcome-banner:after{content:"";background:radial-gradient(circle,#8b7fff26,#0000 70%);border-radius:50%;width:120px;height:120px;position:absolute;bottom:-40px;right:30px}[data-theme=light] .welcome-banner{background:linear-gradient(135deg,#6c63ff 0%,#8b7fff 50%,#a78bfa 100%);border-color:#0000}[data-theme=light] .welcome-banner .welcome-title{color:#fff}[data-theme=light] .welcome-banner .welcome-sub{color:#fffc}.welcome-title{color:var(--text-primary);z-index:1;margin-bottom:8px;font-size:20px;font-weight:700;position:relative}.welcome-sub{color:var(--text-secondary);z-index:1;margin-bottom:16px;font-size:13px;position:relative}.welcome-btn{background:var(--accent);color:#fff;border-radius:var(--r-md);cursor:pointer;z-index:1;box-shadow:var(--glow-accent);border:none;align-items:center;gap:8px;padding:8px 18px;font-size:13px;font-weight:600;text-decoration:none;transition:all .2s;display:inline-flex;position:relative}.welcome-btn:hover{background:var(--accent-hover);transform:translateY(-1px)}.section-header{justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}.section-title{color:var(--text-primary);font-size:16px;font-weight:700}.section-link{color:var(--accent-2);font-size:12px;font-weight:500;transition:color .2s}.section-link:hover{color:var(--accent);text-decoration:underline}.feedback-item{border-bottom:1px solid var(--border);justify-content:space-between;align-items:flex-start;gap:8px;padding:10px 0;display:flex}.feedback-item:last-child{border-bottom:none}.feedback-text{color:var(--text-primary);flex:1;font-size:12px;line-height:1.4}.feedback-course{color:var(--text-secondary);margin-top:2px;font-size:11px}.feedback-score{background:var(--accent-light);color:var(--accent-2);border-radius:var(--r-sm);flex-shrink:0;padding:3px 7px;font-size:11px;font-weight:700}.lesson-shell{min-height:calc(100vh - var(--topbar-h));grid-template-columns:1fr 320px;gap:0;display:grid}.lesson-main{flex-direction:column;display:flex;overflow:hidden}.video-player{aspect-ratio:16/9;background:#000;max-height:65vh;position:relative}.video-player iframe{border:none;width:100%;height:100%;display:block}.lesson-info-bar{border-bottom:1px solid var(--border);padding:20px 24px}.lesson-info-title{color:var(--text-primary);margin-bottom:8px;font-size:18px;font-weight:700}.lesson-info-meta{color:var(--text-secondary);align-items:center;gap:16px;font-size:12px;display:flex}.lesson-tabs{border-bottom:1px solid var(--border);gap:0;padding:0 24px;display:flex}.lesson-tab{color:var(--text-secondary);cursor:pointer;background:0 0;border:none;border-bottom:2px solid #0000;padding:14px 16px;font-size:13px;font-weight:500;transition:all .2s}.lesson-tab:hover{color:var(--text-primary)}.lesson-tab.active{color:var(--accent-2);border-bottom-color:var(--accent);font-weight:600}.lesson-tab-content{flex:1;padding:24px;overflow-y:auto}.lesson-sidebar{background:var(--bg-sidebar);border-left:1px solid var(--border);flex-direction:column;display:flex;overflow:hidden}.lesson-sidebar-header{border-bottom:1px solid var(--border);flex-shrink:0;padding:16px 18px}.lesson-sidebar-title{color:var(--text-primary);margin-bottom:4px;font-size:13px;font-weight:700}.lesson-sidebar-meta{color:var(--text-secondary);font-size:11px}.lesson-list{flex:1;padding:8px 0;overflow-y:auto}.lesson-list-item{cursor:pointer;align-items:center;gap:10px;padding:10px 16px;transition:background .15s;display:flex}.lesson-list-item:hover{background:var(--bg-hover)}.lesson-list-item.active{background:var(--accent-light)}.lesson-list-num{border:1.5px solid var(--border);width:22px;height:22px;color:var(--text-muted);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:10px;font-weight:700;display:flex}.lesson-list-item.active .lesson-list-num{background:var(--accent);border-color:var(--accent);color:#fff}.lesson-list-info{flex:1;min-width:0}.lesson-list-title{color:var(--text-primary);white-space:nowrap;text-overflow:ellipsis;margin-bottom:2px;font-size:12px;font-weight:500;overflow:hidden}.lesson-list-item.active .lesson-list-title{color:var(--accent-2)}.lesson-list-type{color:var(--text-muted);font-size:10px}.lesson-list-check{flex-shrink:0;font-size:14px}.course-detail-hero{background:var(--bg-card);border-bottom:1px solid var(--border);grid-template-columns:1fr 320px;align-items:start;gap:32px;padding:28px 24px;display:grid}.course-detail-hero-img{border-radius:var(--r-lg);aspect-ratio:16/9;background:var(--bg-card-alt);order:1;justify-content:center;align-items:center;font-size:4rem;display:flex;overflow:hidden}.course-detail-hero-img img{object-fit:cover;width:100%;height:100%}.course-detail-breadcrumb{color:var(--text-secondary);align-items:center;gap:6px;margin-bottom:10px;font-size:12px;display:flex}.course-detail-title{color:var(--text-primary);margin-bottom:12px;font-size:22px;font-weight:800;line-height:1.3}.course-detail-desc{color:var(--text-secondary);margin-bottom:14px;font-size:13px;line-height:1.7}.course-detail-stats{color:var(--text-secondary);flex-wrap:wrap;align-items:center;gap:16px;font-size:12px;display:flex}.star-rating{color:var(--warning);font-size:13px}.price-card{background:var(--bg-card-alt);border:1px solid var(--border);border-radius:var(--r-lg);padding:20px;position:sticky;top:80px}.price-value{color:var(--text-primary);margin-bottom:16px;font-size:28px;font-weight:800}.enroll-btn{background:linear-gradient(135deg, var(--accent), var(--accent-2));color:#fff;border-radius:var(--r-md);cursor:pointer;width:100%;box-shadow:var(--glow-accent);border:none;margin-bottom:16px;padding:13px;font-size:15px;font-weight:700;transition:all .2s}.enroll-btn:hover{transform:translateY(-1px);box-shadow:0 8px 24px #6c63ff73}.price-features{flex-direction:column;gap:10px;display:flex}.price-feature{color:var(--text-secondary);align-items:center;gap:8px;font-size:12px;display:flex}.price-feature-icon{font-size:14px}.course-tabs{border-bottom:1px solid var(--border);background:var(--bg-card);top:var(--topbar-h);z-index:50;gap:4px;padding:0 24px;display:flex;position:sticky}.course-tab{color:var(--text-secondary);cursor:pointer;white-space:nowrap;background:0 0;border:none;border-bottom:2px solid #0000;padding:14px 20px;font-size:13px;font-weight:500;transition:all .2s}.course-tab:hover{color:var(--text-primary)}.course-tab.active{color:var(--accent-2);border-bottom-color:var(--accent);font-weight:600}.curriculum-module{background:var(--bg-card);border:1px solid var(--border-card);border-radius:var(--r-lg);margin-bottom:10px;overflow:hidden}.curriculum-module-header{background:var(--bg-card-alt);cursor:pointer;-webkit-user-select:none;user-select:none;justify-content:space-between;align-items:center;padding:14px 18px;display:flex}.curriculum-module-title{color:var(--text-primary);font-size:14px;font-weight:600}.curriculum-module-meta{color:var(--text-secondary);margin-top:2px;font-size:11px}.curriculum-lesson{border-top:1px solid var(--border);color:var(--text-primary);cursor:pointer;align-items:center;gap:12px;padding:12px 18px;font-size:13px;transition:background .15s;display:flex}.curriculum-lesson:hover{background:var(--bg-hover)}.curriculum-lesson-icon{border-radius:var(--r-sm);background:var(--accent-light);flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;font-size:12px;display:flex}.curriculum-lesson-duration{color:var(--text-secondary);margin-left:auto;font-size:11px;font-weight:500}.stats-grid{grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:24px;display:grid}.stat-card{background:var(--bg-card);border:1px solid var(--border-card);border-radius:var(--r-lg);align-items:center;gap:14px;padding:18px 20px;transition:all .2s;display:flex}.stat-card:hover{border-color:var(--accent);box-shadow:var(--shadow-md);transform:translateY(-2px)}.stat-icon{border-radius:var(--r-md);flex-shrink:0;justify-content:center;align-items:center;width:44px;height:44px;font-size:20px;display:flex}.stat-icon-blue{background:var(--info-bg)}.stat-icon-green{background:var(--success-bg)}.stat-icon-yellow{background:var(--warning-bg)}.stat-icon-purple{background:var(--accent-light)}.stat-icon-orange{background:var(--orange-bg)}.stat-value{color:var(--text-primary);margin-bottom:4px;font-size:26px;font-weight:800;line-height:1}.stat-label{color:var(--text-secondary);font-size:12px}table{border-collapse:collapse;width:100%}thead{background:var(--bg-card-alt)}th{text-align:left;text-transform:uppercase;letter-spacing:.7px;color:var(--text-secondary);white-space:nowrap;padding:12px 16px;font-size:11px;font-weight:700}td{border-top:1px solid var(--border);color:var(--text-primary);vertical-align:middle;padding:13px 16px;font-size:13px}tbody tr:hover{background:var(--bg-hover)}.btn{border-radius:var(--r-md);cursor:pointer;white-space:nowrap;border:none;align-items:center;gap:7px;padding:8px 16px;font-size:13px;font-weight:600;text-decoration:none;transition:all .2s;display:inline-flex}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--accent);color:#fff;box-shadow:0 4px 12px #6c63ff4d}.btn-primary:hover:not(:disabled){background:var(--accent-hover);transform:translateY(-1px);box-shadow:0 6px 16px #6c63ff66}.btn-secondary{background:var(--bg-card-alt);color:var(--text-primary);border:1px solid var(--border)}.btn-secondary:hover:not(:disabled){background:var(--bg-hover);border-color:var(--accent);color:var(--accent-2)}.btn-outline{color:var(--accent-2);border:1px solid var(--accent);background:0 0}.btn-outline:hover:not(:disabled){background:var(--accent-light)}.btn-danger{background:var(--danger-bg);color:var(--danger);border:1px solid 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