@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap";
*,:before,:after{box-sizing:border-box;margin:0;padding:0}:root{--navy:#1d212b;--navy-light:#2a2f3d;--navy-muted:#3d4457;--blue:#1d212b;--blue-light:#3d4457;--blue-dark:#000;--bg:#f9f7f5;--bg-card:#fff;--text:#1f2937;--text-muted:#6b7280;--text-light:#9ca3af;--border:#e5e7eb;--border-light:#f3f4f6;--success:#10b981;--danger:#ef4444;--warning:#f59e0b;--sidebar-w:260px;--sidebar-collapsed-w:68px;--topbar-h:64px;--radius:10px;--radius-lg:14px;--shadow:0 1px 3px #00000014, 0 1px 2px #0000000a;--shadow-md:0 4px 16px #00000014;--shadow-lg:0 10px 40px #0000001f;--transition:.18s ease}html{font-size:15px}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;font-family:Inter,sans-serif;line-height:1.6}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--border);border-radius:99px}::-webkit-scrollbar-thumb:hover{background:var(--text-light)}.layout{min-height:100vh;display:flex}.main-content{margin-left:var(--sidebar-w);padding-top:var(--topbar-h);flex:1;transition:margin-left .3s}.page-container{max-width:1200px;margin:0 auto;padding:32px}.sidebar{width:var(--sidebar-w);background:var(--navy);z-index:100;flex-direction:column;height:100vh;transition:width .3s,transform .3s;display:flex;position:fixed;top:0;left:0;box-shadow:2px 0 20px #0003}.sidebar.collapsed{width:var(--sidebar-collapsed-w)}.sidebar-logo{white-space:nowrap;border-bottom:1px solid #ffffff14;align-items:center;gap:10px;min-height:72px;padding:20px 14px;display:flex;overflow:hidden}.sidebar-logo-icon{background:var(--blue);border-radius:10px;flex-shrink:0;place-items:center;width:38px;height:38px;display:grid}.sidebar-logo-icon svg{color:#fff;width:22px;height:22px}.sidebar-logo-text{color:#fff;letter-spacing:-.3px;flex:1;font-size:1.05rem;font-weight:700;overflow:hidden}.sidebar-logo-text span{color:var(--blue-light)}.sidebar-toggle-btn{cursor:pointer;color:#fff9;background:#ffffff14;border:none;border-radius:6px;flex-shrink:0;place-items:center;width:28px;height:28px;margin-left:auto;transition:background .2s,color .2s;display:grid}.sidebar-toggle-btn:hover{color:#fff;background:#ffffff29}.sidebar.collapsed .sidebar-toggle-btn{margin-left:0}.sidebar-nav{flex:1;padding:12px 10px;overflow:visible auto}.nav-section-label{color:#ffffff59;letter-spacing:1px;text-transform:uppercase;white-space:nowrap;padding:10px 8px 6px;font-size:.68rem;font-weight:600}.nav-item-wrap{position:relative}.nav-item{color:#ffffffa6;cursor:pointer;white-space:nowrap;background:0 0;border:none;border-radius:8px;align-items:center;gap:12px;width:100%;margin-bottom:2px;padding:10px 12px;font-size:.875rem;font-weight:500;text-decoration:none;transition:all .2s;display:flex;overflow:hidden}.nav-item svg{flex-shrink:0;width:18px;height:18px}.nav-item:hover{color:#fff;background:#ffffff14}.nav-item.active{background:var(--blue);color:#fff;box-shadow:0 4px 12px #3a7dff59}.nav-item.active svg{color:#fff}.nav-item.nav-item-icon-only{justify-content:center;gap:0;padding:10px 0}.nav-tooltip{color:#fff;white-space:nowrap;pointer-events:none;opacity:0;z-index:9999;background:#141823f7;border-radius:8px;margin-left:12px;padding:7px 14px;font-size:.82rem;font-weight:500;transition:opacity .18s;position:fixed;box-shadow:0 4px 20px #00000059}.nav-tooltip:before{content:"";border:5px solid #0000;border-right-color:#141823f7;position:absolute;top:50%;right:100%;transform:translateY(-50%)}.nav-item-wrap:hover .nav-tooltip{opacity:1}.sidebar-footer{border-top:1px solid #ffffff14;padding:12px 10px}.sidebar-user{border-radius:8px;align-items:center;gap:10px;padding:8px 10px;display:flex;overflow:hidden}.sidebar-user.sidebar-user-icon-only{justify-content:center;padding:8px 0}.sidebar-avatar{color:#fff;background:#ffffff26;border-radius:50%;flex-shrink:0;place-items:center;width:34px;height:34px;font-size:.8rem;font-weight:700;display:grid}.sidebar-user-info{flex:1;min-width:0;overflow:hidden}.sidebar-user-name{color:#fff;white-space:nowrap;text-overflow:ellipsis;font-size:.825rem;font-weight:600;overflow:hidden}.sidebar-user-role{color:#fff6;font-size:.72rem}.topbar{top:0;left:var(--sidebar-w);height:var(--topbar-h);background:var(--bg-card);border-bottom:1px solid var(--border);z-index:50;align-items:center;gap:16px;padding:0 32px;transition:left .3s;display:flex;position:fixed;right:0}.topbar-title{color:var(--text);flex:1;font-size:1rem;font-weight:600}.topbar-actions{align-items:center;gap:12px;display:flex}.topbar-badge{background:var(--bg);border:1px solid var(--border);color:var(--text-muted);border-radius:6px;padding:5px 10px;font-size:.8rem;font-weight:500}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow)}.card-header{justify-content:space-between;align-items:center;gap:12px;padding:20px 24px 0;display:flex}.card-body{padding:20px 24px}.card-title{color:var(--text);font-size:.95rem;font-weight:700}.card-subtitle{color:var(--text-muted);margin-top:2px;font-size:.8rem}.stat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow);transition:box-shadow var(--transition), transform var(--transition);align-items:center;gap:20px;padding:24px;display:flex}.stat-card:hover{box-shadow:var(--shadow-md);transform:translateY(-1px)}.stat-icon{border-radius:12px;flex-shrink:0;place-items:center;width:52px;height:52px;display:grid}.stat-icon svg{width:24px;height:24px}.stat-icon.blue{color:var(--blue);background:#3a7dff1a}.stat-icon.green{color:var(--success);background:#10b9811a}.stat-icon.navy{color:var(--navy);background:#0a1f4414}.stat-icon.orange{color:var(--warning);background:#f59e0b1a}.stat-label{color:var(--text-muted);font-size:.78rem;font-weight:500}.stat-value{color:var(--text);letter-spacing:-1px;font-size:1.75rem;font-weight:800;line-height:1.1}.btn{cursor:pointer;transition:all var(--transition);white-space:nowrap;border:none;border-radius:8px;align-items:center;gap:8px;padding:9px 18px;font-size:.875rem;font-weight:600;line-height:1;text-decoration:none;display:inline-flex}.btn svg{width:16px;height:16px}.btn-primary{background:var(--blue);color:#fff}.btn-primary:hover{background:var(--blue-dark);box-shadow:0 4px 12px #3a7dff66}.btn-secondary{background:var(--bg);border:1px solid var(--border);color:var(--text)}.btn-secondary:hover{background:var(--border-light);border-color:var(--text-light)}.btn-danger{background:var(--danger);color:#fff}.btn-danger:hover{background:#dc2626}.btn-success{background:var(--success);color:#fff}.btn-ghost{color:var(--text-muted);background:0 0}.btn-ghost:hover{background:var(--bg);color:var(--text)}.btn-sm{padding:6px 12px;font-size:.8rem}.btn-lg{padding:12px 24px;font-size:1rem}.btn-icon{padding:8px}.btn:disabled{opacity:.5;cursor:not-allowed}.form-group{margin-bottom:18px}.form-label{color:var(--text);margin-bottom:6px;font-size:.82rem;font-weight:600;display:block}.form-control{border:1.5px solid var(--border);width:100%;color:var(--text);background:var(--bg-card);transition:border-color var(--transition), box-shadow var(--transition);border-radius:8px;outline:none;padding:10px 14px;font-family:inherit;font-size:.875rem}.form-control:focus{border-color:var(--blue);box-shadow:0 0 0 3px #3a7dff1f}.form-control::placeholder{color:var(--text-light)}select.form-control{cursor:pointer}textarea.form-control{resize:vertical;min-height:90px}.form-hint{color:var(--text-muted);margin-top:4px;font-size:.75rem}.form-error{color:var(--danger);margin-top:4px;font-size:.75rem}.badge{border-radius:99px;align-items:center;gap:4px;padding:3px 8px;font-size:.72rem;font-weight:600;display:inline-flex}.badge-blue{color:var(--blue);background:#3a7dff1f}.badge-green{color:var(--success);background:#10b9811f}.badge-red{color:var(--danger);background:#ef44441f}.badge-gray{background:var(--border-light);color:var(--text-muted)}.badge-orange{color:var(--warning);background:#f59e0b1f}.table-wrap{overflow-x:auto}table{border-collapse:collapse;width:100%}thead tr{border-bottom:1.5px solid var(--border)}thead th{text-align:left;color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;padding:10px 16px;font-size:.75rem;font-weight:700}tbody tr{border-bottom:1px solid var(--border-light);transition:background var(--transition)}tbody tr:hover{background:var(--bg)}tbody tr:last-child{border-bottom:none}tbody td{color:var(--text);vertical-align:middle;padding:14px 16px;font-size:.875rem}.content-course-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow);transition:box-shadow .2s;overflow:hidden}.content-course-card:hover{box-shadow:var(--shadow-md)}.content-course-row{cursor:pointer;align-items:center;gap:14px;padding:16px 20px;transition:background .15s;display:flex}.content-course-row:hover{background:var(--bg)}.content-course-items{border-top:1px solid var(--border);background:var(--bg);animation:.2s slideDown}@keyframes slideDown{0%{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}.content-add-btn{cursor:pointer;white-space:nowrap;border:1.5px solid;border-radius:8px;align-items:center;gap:6px;padding:7px 14px;font-size:.8rem;font-weight:600;transition:background .18s,color .18s,box-shadow .18s,transform .12s;display:inline-flex}.content-add-btn:active{transform:scale(.97)}.content-add-btn-video{color:var(--navy);border-color:var(--navy);background:0 0}.content-add-btn-video:hover{background:var(--navy);color:#fff;box-shadow:0 4px 14px #1d212b59}.content-add-btn-pdf{color:var(--danger);border-color:var(--danger);background:0 0}.content-add-btn-pdf:hover{background:var(--danger);color:#fff;box-shadow:0 4px 14px #ef444459}.content-delete-btn{color:var(--danger);border:1.5px solid var(--danger);cursor:pointer;background:0 0;border-radius:6px;padding:5px 12px;font-size:.78rem;font-weight:600;transition:background .18s,color .18s,box-shadow .18s,transform .12s}.content-delete-btn:hover{background:var(--danger);color:#fff;box-shadow:0 3px 10px #ef44444d}.content-delete-btn:active{transform:scale(.96)}.login-page{grid-template-columns:1fr 1fr;min-height:100vh;display:grid}.login-left{background:var(--navy);flex-direction:column;justify-content:center;align-items:center;padding:60px;display:flex;position:relative;overflow:hidden}.login-left:before{content:"";background:radial-gradient(circle,#3a7dff40 0%,#0000 70%);width:400px;height:400px;position:absolute;top:-100px;right:-100px}.login-left:after{content:"";background:radial-gradient(circle,#3a7dff26 0%,#0000 70%);width:300px;height:300px;position:absolute;bottom:-80px;left:-80px}.login-brand{text-align:center;z-index:1;position:relative}.login-brand-icon{background:var(--blue);border-radius:20px;place-items:center;width:72px;height:72px;margin:0 auto 24px;display:grid}.login-brand-icon svg{color:#fff;width:40px;height:40px}.login-brand h1{color:#fff;letter-spacing:-1px;font-size:2rem;font-weight:800}.login-brand p{color:#ffffff8c;margin-top:8px;font-size:.9rem}.login-features{z-index:1;flex-direction:column;gap:16px;margin-top:48px;display:flex;position:relative}.login-feature{color:#ffffffb3;align-items:center;gap:12px;font-size:.875rem;display:flex}.login-feature svg{width:18px;height:18px;color:var(--blue-light);flex-shrink:0}.login-right{background:var(--bg);justify-content:center;align-items:center;padding:60px;display:flex}.login-form-wrap{width:100%;max-width:400px}.login-form-wrap h2{color:var(--text);letter-spacing:-.5px;font-size:1.6rem;font-weight:800}.login-form-wrap p{color:var(--text-muted);margin-top:6px;margin-bottom:32px;font-size:.875rem}.login-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:32px}.course-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;display:grid}.course-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);transition:box-shadow var(--transition), transform var(--transition);cursor:pointer;color:inherit;flex-direction:column;text-decoration:none;display:flex;overflow:hidden}.course-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}.course-thumb{background:linear-gradient(135deg, var(--navy) 0%, var(--navy-muted) 100%);height:130px;position:relative;overflow:hidden}.course-thumb img{object-fit:cover;object-position:center top;width:100%;height:100%;display:block}.course-thumb svg{color:#ffffff40;width:48px;height:48px;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.course-card-body{flex:1;padding:20px}.course-card-title{color:var(--text);margin-bottom:6px;font-size:.95rem;font-weight:700}.course-card-desc{color:var(--text-muted);font-size:.82rem;line-height:1.5}.course-card-footer{border-top:1px solid var(--border-light);gap:16px;padding:14px 20px;display:flex}.course-meta{color:var(--text-muted);align-items:center;gap:5px;font-size:.78rem;display:flex}.course-meta svg{width:14px;height:14px}.video-player-wrap{border-radius:var(--radius-lg);aspect-ratio:16/9;background:#000;position:relative;overflow:hidden}.video-player-wrap iframe{border:none;width:100%;height:100%}.video-no-select{-webkit-user-select:none;user-select:none}.pdf-viewer-wrap{border-radius:var(--radius-lg);border:1px solid var(--border);position:relative;overflow:hidden}.pdf-viewer-wrap iframe{border:none;width:100%;height:80vh;display:block}.content-list{flex-direction:column;gap:4px;display:flex}.content-item{cursor:pointer;color:inherit;transition:background var(--transition);border:1px solid #0000;border-radius:8px;align-items:center;gap:14px;padding:12px 16px;text-decoration:none;display:flex}.content-item:hover{background:var(--bg);border-color:var(--border)}.content-item.active{background:#3a7dff0f;border-color:#3a7dff33}.content-item-icon{border-radius:8px;flex-shrink:0;place-items:center;width:36px;height:36px;display:grid}.content-item-icon.video{color:var(--blue);background:#3a7dff1a}.content-item-icon.pdf{color:var(--danger);background:#ef44441a}.content-item-icon svg{width:18px;height:18px}.content-item-title{color:var(--text);flex:1;font-size:.875rem;font-weight:500}.content-item-meta{color:var(--text-muted);font-size:.76rem}.empty-state{text-align:center;flex-direction:column;justify-content:center;align-items:center;padding:60px 20px;display:flex}.empty-state svg{width:48px;height:48px;color:var(--text-light);margin-bottom:16px}.empty-state h3{color:var(--text);font-size:1rem;font-weight:600}.empty-state p{color:var(--text-muted);margin-top:4px;font-size:.875rem}.alert{border-radius:8px;align-items:flex-start;gap:10px;padding:12px 16px;font-size:.875rem;display:flex}.alert svg{flex-shrink:0;width:18px;height:18px;margin-top:1px}.alert-error{color:#b91c1c;background:#ef444414;border:1px solid #ef444433}.alert-success{color:#065f46;background:#10b98114;border:1px solid #10b98133}.modal-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:200;background:#00000080;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.modal{background:var(--bg-card);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);width:100%;max-width:520px;max-height:90vh;overflow-y:auto}.modal-header{justify-content:space-between;align-items:center;padding:24px 24px 0;display:flex}.modal-title{color:var(--text);font-size:1.1rem;font-weight:700}.modal-body{padding:20px 24px}.modal-footer{justify-content:flex-end;gap:10px;padding:0 24px 24px;display:flex}.stats-grid{grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:28px;display:grid}.page-header{margin-bottom:28px}.page-header h1{color:var(--text);letter-spacing:-.5px;font-size:1.5rem;font-weight:800}.page-header p{color:var(--text-muted);margin-top:4px;font-size:.875rem}.page-header-row{justify-content:space-between;align-items:center;gap:16px;display:flex}.toggle{width:40px;height:22px;display:inline-flex;position:relative}.toggle input{opacity:0;width:0;height:0}.toggle-slider{background:var(--border);cursor:pointer;transition:background var(--transition);border-radius:99px;position:absolute;inset:0}.toggle-slider:before{content:"";width:16px;height:16px;transition:transform var(--transition);background:#fff;border-radius:50%;position:absolute;top:3px;left:3px}.toggle input:checked+.toggle-slider{background:var(--blue)}.toggle input:checked+.toggle-slider:before{transform:translate(18px)}.divider{border:none;border-top:1px solid var(--border);margin:20px 0}.hamburger{cursor:pointer;color:var(--text);background:0 0;border:none;padding:8px;display:none}.hamburger svg{width:22px;height:22px}.sidebar-overlay{z-index:99;background:#00000080;display:none;position:fixed;inset:0}@media (max-width:768px){.login-page{grid-template-columns:1fr}.login-left{display:none}:root{--sidebar-w:260px}.main-content{margin-left:0}.topbar{left:0}.sidebar{transform:translate(-100%);width:var(--sidebar-w)!important}.sidebar.mobile-open{transform:translate(0)}.sidebar-overlay.open{display:block}.sidebar-toggle-btn{display:none}.hamburger{display:block}.page-container{padding:20px 16px}.stats-grid{grid-template-columns:1fr 1fr}.course-grid{grid-template-columns:1fr}}@media (max-width:480px){.stats-grid{grid-template-columns:1fr}}