:root{--bg-primary:#0b0f19;--bg-secondary:#131a2e;--bg-card:#141a2ecc;--border:#ffffff14;--border-focus:#3b82f680;--text-primary:#f8fafc;--text-secondary:#94a3b8;--text-muted:#64748b;--accent-blue:#3b82f6;--accent-indigo:#6366f1;--accent-green:#10b981;--accent-yellow:#f59e0b;--accent-red:#ef4444;--accent-purple:#8b5cf6;--shadow-card:0 8px 32px 0 #0000005e;--radius:12px;--radius-lg:16px;--transition:all .2s cubic-bezier(.4, 0, .2, 1)}*{box-sizing:border-box;margin:0;padding:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}body{background:radial-gradient(circle at 50% 0%, var(--bg-secondary) 0%, var(--bg-primary) 100%);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background-attachment:fixed;min-height:100vh}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:#ffffff1a;border-radius:3px}::-webkit-scrollbar-thumb:hover{background:#fff3}h1,h2,h3,h4,h5,h6{letter-spacing:-.02em;font-family:Outfit,sans-serif;font-weight:600}a{color:var(--accent-blue);transition:var(--transition);text-decoration:none}a:hover{filter:brightness(1.2)}.app-container{min-height:100vh;display:flex}.sidebar{-webkit-backdrop-filter:blur(20px);border-right:1px solid var(--border);z-index:100;background:#0b0f19d9;flex-direction:column;width:260px;height:100vh;padding:24px 16px;display:flex;position:sticky;top:0}.sidebar-brand{background:linear-gradient(135deg, var(--accent-blue), var(--accent-indigo));-webkit-text-fill-color:transparent;-webkit-background-clip:text;align-items:center;gap:8px;margin-bottom:32px;padding:0 8px;font-size:20px;font-weight:700;display:flex}.sidebar-nav{flex-direction:column;flex:1;gap:8px;display:flex}.sidebar-link{border-radius:var(--radius);color:var(--text-secondary);transition:var(--transition);align-items:center;gap:12px;padding:12px;font-size:14px;font-weight:500;display:flex}.sidebar-link:hover,.sidebar-link.active{color:var(--text-primary);background:#ffffff0d}.sidebar-link.active{color:#60a5fa;background:#3b82f626;border:1px solid #3b82f633}.sidebar-footer{border-top:1px solid var(--border);flex-direction:column;gap:12px;padding-top:16px;display:flex}.user-profile{align-items:center;gap:12px;padding:8px;display:flex}.user-avatar{background:linear-gradient(135deg, var(--accent-indigo), var(--accent-purple));color:#fff;border-radius:50%;justify-content:center;align-items:center;width:36px;height:36px;font-size:14px;font-weight:600;display:flex}.user-info{flex-direction:column;display:flex;overflow:hidden}.user-name{color:var(--text-primary);white-space:nowrap;text-overflow:ellipsis;font-size:14px;font-weight:600;overflow:hidden}.user-role{color:var(--text-secondary);font-size:12px}.main-content{flex:1;width:100%;max-width:1400px;margin:0 auto;padding:32px;overflow-y:auto}.page-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;margin-bottom:32px;display:flex}.page-title{background:linear-gradient(135deg, #fff 30%, var(--text-secondary));-webkit-text-fill-color:transparent;-webkit-background-clip:text;font-size:28px}.card{background:var(--bg-card);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-card);transition:var(--transition);padding:24px}.card:hover{border-color:#ffffff26;box-shadow:0 8px 36px #00000073}.stats-grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:20px;margin-bottom:32px;display:grid}.stat-card{flex-direction:column;justify-content:space-between;display:flex}.stat-header{justify-content:space-between;align-items:flex-start;margin-bottom:12px;display:flex}.stat-label{color:var(--text-secondary);font-size:14px}.stat-icon{color:var(--accent-blue);opacity:.8}.stat-value{background:linear-gradient(90deg,#fff,#e2e8f0);-webkit-text-fill-color:transparent;-webkit-background-clip:text;font-size:28px;font-weight:700}.btn{border-radius:var(--radius);cursor:pointer;transition:var(--transition);border:1px solid #0000;justify-content:center;align-items:center;gap:8px;padding:10px 18px;font-size:14px;font-weight:500;display:inline-flex}.btn-primary{background:linear-gradient(135deg, var(--accent-blue), var(--accent-indigo));color:#fff;box-shadow:0 4px 12px #3b82f64d}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 6px 16px #3b82f666}.btn-secondary{border:1px solid var(--border);color:var(--text-primary);background:#ffffff0d}.btn-secondary:hover{background:#ffffff1a;border-color:#fff3}.btn-danger{background:var(--accent-red);color:#fff}.btn:disabled{opacity:.5;cursor:not-allowed;box-shadow:none!important;transform:none!important}.form-group{margin-bottom:20px}.form-label{color:var(--text-secondary);margin-bottom:6px;font-size:14px;display:block}.form-input{border:1px solid var(--border);border-radius:var(--radius);width:100%;color:var(--text-primary);transition:var(--transition);background:#0b0f1999;padding:10px 14px;font-size:14px}.form-input:focus{border-color:var(--border-focus);background:#0b0f19cc;outline:none;box-shadow:0 0 0 2px #3b82f633}.auth-container{background:radial-gradient(circle at 50% 30%,#172242 0%,#0b0f19 100%);justify-content:center;align-items:center;min-height:100vh;padding:20px;display:flex}.auth-card{width:100%;max-width:400px}.auth-logo{text-align:center;background:linear-gradient(135deg, var(--accent-blue), var(--accent-indigo));-webkit-text-fill-color:transparent;-webkit-background-clip:text;margin-bottom:24px;font-family:Outfit,sans-serif;font-size:26px;font-weight:700}.badge{border-radius:20px;align-items:center;padding:4px 10px;font-size:12px;font-weight:500;display:inline-flex}.badge-blue{color:#60a5fa;background:#3b82f626}.badge-green{color:#34d399;background:#10b98126}.badge-yellow{color:#fbbf24;background:#f59e0b26}.badge-red{color:#f87171;background:#ef444426}.badge-purple{color:#a78bfa;background:#8b5cf626}.badge-gray{color:#94a3b8;background:#64748b26}.dashboard-grid{grid-template-columns:2fr 1fr;gap:24px;margin-bottom:32px;display:grid}@media (width<=1024px){.dashboard-grid{grid-template-columns:1fr}}.courses-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px;display:grid}.list-container{flex-direction:column;gap:16px;display:flex}.list-item{border:1px solid var(--border);border-radius:var(--radius);transition:var(--transition);background:#ffffff05;justify-content:space-between;align-items:center;padding:16px;display:flex}.list-item:hover{background:#ffffff0a;border-color:#ffffff1f}.list-item-main{flex:1;align-items:center;gap:16px;display:flex;overflow:hidden}.list-item-icon{width:40px;height:40px;color:var(--accent-blue);background:#ffffff0d;border-radius:8px;justify-content:center;align-items:center;display:flex}.list-item-content{flex-direction:column;display:flex;overflow:hidden}.list-item-title{color:var(--text-primary);white-space:nowrap;text-overflow:ellipsis;font-size:15px;font-weight:600;overflow:hidden}.list-item-subtitle{color:var(--text-secondary);margin-top:2px;font-size:12px}.course-card{flex-direction:column;height:100%;padding:0;display:flex;overflow:hidden}.course-thumbnail{background:linear-gradient(135deg,#1e293b,#0f172a);justify-content:center;align-items:center;width:100%;height:160px;display:flex;position:relative}.course-thumbnail-overlay{position:absolute;top:12px;right:12px}.course-card-content{flex-direction:column;flex:1;padding:20px;display:flex}.course-card-title{color:var(--text-primary);margin-bottom:8px;font-size:18px;font-weight:600}.course-card-description{color:var(--text-secondary);flex:1;margin-bottom:20px;font-size:14px;line-height:1.5}.progress-bar-container{background:#ffffff0d;border-radius:4px;width:100%;height:8px;margin-bottom:8px;overflow:hidden}.progress-bar-fill{background:linear-gradient(to right, var(--accent-blue), var(--accent-indigo));border-radius:4px;height:100%;transition:width .4s}.progress-label-row{color:var(--text-secondary);justify-content:space-between;font-size:12px;display:flex}.video-wrapper{border-radius:var(--radius-lg);border:1px solid var(--border);background:#000;height:0;margin-bottom:24px;padding-bottom:56.25%;position:relative;overflow:hidden}.video-wrapper iframe{width:100%;height:100%;position:absolute;top:0;left:0}.lesson-layout{grid-template-columns:3fr 1fr;gap:32px;display:grid}@media (width<=1024px){.lesson-layout{grid-template-columns:1fr}}.markdown-content{color:var(--text-primary);font-size:15px;line-height:1.7}.markdown-content h1,.markdown-content h2,.markdown-content h3{color:#fff;margin-top:24px;margin-bottom:12px}.markdown-content p{margin-bottom:16px}.markdown-content ul,.markdown-content ol{margin-bottom:16px;margin-left:20px}.markdown-content li{margin-bottom:8px}.circular-progress-widget{flex-direction:column;justify-content:center;align-items:center;padding:32px;display:flex}.circle-bg{fill:none;stroke:#ffffff0d}.circle-val{fill:none;stroke-linecap:round;transition:stroke-dashoffset .5s ease-in-out}.circle-text{fill:#fff;font-family:Outfit,sans-serif;font-size:24px;font-weight:700}.circle-subtext{fill:var(--text-secondary);font-size:10px}@media (width<=768px){.app-container{flex-direction:column}.sidebar{border-right:none;border-bottom:1px solid var(--border);width:100%;height:auto;padding:16px;position:static}.main-content{padding:20px 16px}}