@import url("https://fonts.googleapis.com/css2?family=Nunito:wght@400;500;600;700;800&family=Montserrat:wght@400;500;600;700;800;900&display=swap");@tailwind base;@tailwind components;@tailwind utilities;:root,[data-theme=dark]{--bg:#111;--surface:#1a1a1a;--surface-alt:#222;--border:#333;--text:#eee;--text-muted:#888;--brand-primary:#333;--brand-secondary:#444;--brand-accent:#666;--accent:#666;--accent-hover:#888;--accent-soft:hsla(0,0%,39%,.14);--success:#34d399;--success-soft:rgba(52,211,153,.14);--danger:#f87171;--danger-soft:hsla(0,91%,71%,.14);--warn:#fbbf24;--warn-soft:rgba(251,191,36,.14);--modal-bg:rgba(0,0,0,.7);--shadow-card:none}[data-theme=light]{--bg:#f5f5f5;--surface:#fff;--surface-alt:#f0f0f0;--border:#e0e0e0;--text:#111;--text-muted:#666;--brand-primary:#333;--brand-secondary:#555;--brand-accent:#888;--accent:#333;--accent-hover:#555;--accent-soft:rgba(50,50,50,.1);--success:#059669;--success-soft:rgba(5,150,105,.12);--danger:#dc2626;--danger-soft:rgba(220,38,38,.1);--warn:#d97706;--warn-soft:rgba(217,119,6,.12);--modal-bg:rgba(13,21,56,.5);--shadow-card:0 1px 3px rgba(13,21,56,.06),0 1px 2px rgba(13,21,56,.04)}*{box-sizing:border-box}body,html{margin:0;padding:0}body{font-family:Nunito,system-ui,sans-serif;background:var(--bg);color:var(--text);transition:background .2s,color .2s;-webkit-tap-highlight-color:transparent;-webkit-text-size-adjust:100%}h1,h2,h3,h4,h5,h6{font-family:Montserrat,system-ui,sans-serif;letter-spacing:-.01em}button,input,select,textarea{font-family:inherit}input:focus,select:focus,textarea:focus{outline:none}[data-theme=dark] input:focus,[data-theme=dark] select:focus,[data-theme=dark] textarea:focus,input:focus,select:focus,textarea:focus{border-color:var(--brand-primary)!important;box-shadow:0 0 0 3px var(--accent-soft)}button{cursor:pointer}button:hover{opacity:.9}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:var(--border);border-radius:3px}.card{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:24px;box-shadow:var(--shadow-card);transition:background .2s,border-color .2s}.btn{display:inline-flex;align-items:center;gap:8px;padding:10px 20px;border-radius:8px;border:none;font-size:14px;font-weight:700;transition:all .2s;letter-spacing:.01em;white-space:nowrap}.btn-primary{background:linear-gradient(135deg,var(--brand-primary),var(--brand-secondary));color:#fff;box-shadow:0 2px 8px rgba(0,0,0,.2)}.btn-primary:hover{box-shadow:0 4px 14px rgba(0,0,0,.3);opacity:1}.btn-secondary{background:var(--surface-alt);color:var(--text);border:1px solid var(--border)}.btn-danger{background:var(--danger-soft);color:var(--danger)}.btn-ghost{background:transparent;color:var(--text-muted);padding:6px 10px}.btn-sm{padding:6px 14px;font-size:13px}.input{font-family:inherit;font-size:14px;padding:10px 14px;background:var(--surface-alt);color:var(--text);border:1px solid var(--border);border-radius:8px;outline:none;width:100%;transition:border-color .15s,box-shadow .15s}select.input{-moz-appearance:none;appearance:none;-webkit-appearance:none;background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8' fill='none' stroke='%23888888' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M1 1l5 5 5-5'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:36px;cursor:pointer}select.input:disabled{opacity:.5;cursor:not-allowed}.label{font-size:12px;color:var(--text-muted);margin-bottom:6px;display:block;letter-spacing:.06em}.badge,.label{font-weight:700;text-transform:uppercase}.badge{font-size:11px;padding:3px 10px;border-radius:20px;letter-spacing:.04em;display:inline-block}.badge-accent{background:var(--accent-soft);color:var(--accent)}.badge-success{background:var(--success-soft);color:var(--success)}.badge-danger{background:var(--danger-soft);color:var(--danger)}.badge-warn{background:var(--warn-soft);color:var(--warn)}.sidebar{width:240px;background:var(--surface);border-right:1px solid var(--border);padding:24px 0;display:flex;flex-direction:column;height:100vh;position:fixed;top:0;left:0;z-index:100;transition:transform .25s ease,background .2s,border-color .2s}.sidebar-item{display:flex;align-items:center;gap:10px;width:100%;padding:12px 24px;background:transparent;color:var(--text-muted);font-size:14px;font-weight:600;border:none;border-left:3px solid transparent;transition:all .15s;text-align:left}.sidebar-item.active,.sidebar-item:hover{background:var(--accent-soft);color:var(--accent)}.sidebar-item.active{border-left-color:var(--brand-primary);font-weight:700}.main-content{margin-left:240px;padding:32px 40px;min-height:100vh}.mobile-topbar{justify-content:space-between;padding:12px 16px;background:var(--surface);border-bottom:1px solid var(--border);position:-webkit-sticky;position:sticky;top:0;z-index:50}.hamburger,.mobile-topbar{display:none;align-items:center}.hamburger{background:transparent;border:none;color:var(--text);padding:8px;border-radius:8px;justify-content:center}.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:99;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.theme-toggle{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:10px;background:var(--surface-alt);color:var(--text-muted);border:1px solid var(--border);transition:all .2s}.theme-toggle:hover{color:var(--brand-primary);border-color:var(--brand-primary)}.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:0 -4px;padding:0 4px}table{width:100%;border-collapse:collapse;min-width:480px}th{text-align:left;padding:12px 16px;color:var(--text-muted);font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.06em;white-space:nowrap}td,th{border-bottom:1px solid var(--border)}td{padding:14px 16px}.modal-overlay{position:fixed;inset:0;background:var(--modal-bg);display:flex;align-items:center;justify-content:center;z-index:1000;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);padding:16px}.modal-content{background:var(--surface);border-radius:16px;padding:32px;max-width:560px;width:100%;max-height:90vh;overflow:auto;border:1px solid var(--border)}.test-option{display:flex;align-items:center;gap:12px;width:100%;padding:14px 16px;border-radius:10px;background:var(--surface-alt);border:2px solid var(--border);color:var(--text);font-weight:500;font-size:14px;transition:all .15s;text-align:left}.test-option:hover{border-color:var(--brand-accent)}.test-option.selected{background:var(--accent-soft);border-color:var(--brand-primary);color:var(--accent);font-weight:700}.responsive-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));grid-gap:20px;gap:20px}.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);grid-gap:20px;gap:20px;margin-bottom:32px}.page-title{font-family:Montserrat,system-ui,sans-serif;font-size:26px;font-weight:800;margin:0 0 24px;letter-spacing:-.02em}.page-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;gap:12px;flex-wrap:wrap}.login-hero{font-family:Montserrat,system-ui,sans-serif;font-size:11px;font-weight:700;letter-spacing:.18em;color:var(--brand-accent);text-transform:uppercase;margin-bottom:8px}.login-tag{color:var(--text-muted);font-size:14px;font-style:italic;margin:10px 0 0}@media (max-width:900px){.stat-grid{grid-template-columns:repeat(2,1fr)}}.pdf-viewer-wrap{flex:1 1;overflow:hidden;position:relative}.player-sidebar{width:300px;flex-shrink:0;border-left:1px solid var(--border);background:var(--surface);overflow-y:auto}.player-content-area{flex:1 1;display:flex;flex-direction:column;overflow:hidden}.player-module-bar{display:flex;align-items:center;justify-content:space-between;padding:8px 16px;border-bottom:1px solid var(--border);flex-shrink:0;flex-wrap:wrap;gap:8px;min-height:44px}.player-module-title{font-size:15px;font-weight:700;margin:0;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.player-module-title,.player-topbar{display:flex;align-items:center;gap:8px}.player-topbar{padding:0 12px;height:48px;border-bottom:1px solid var(--border);background:var(--surface);flex-shrink:0}@media (max-width:768px){.player-sidebar{position:fixed!important;right:0;top:0;bottom:0;z-index:110;width:85vw!important;max-width:320px;box-shadow:-4px 0 24px rgba(0,0,0,.3);transform:translateX(100%);transition:transform .25s ease}.player-sidebar.open{transform:translateX(0)}.player-sidebar-overlay{position:fixed;inset:0;z-index:105;background:rgba(0,0,0,.5)}.player-module-bar{padding:6px 12px}.player-module-title{font-size:13px}.player-topbar{padding:0 8px;height:44px;gap:6px}.player-topbar .progress-text{display:none}.player-video{max-height:35vh}}@media (hover:none){.pdf-viewer-wrap iframe{margin-top:0!important;height:100%!important}}@media (max-width:768px){.sidebar{transform:translateX(-100%);width:280px;box-shadow:0 0 30px rgba(0,0,0,.3)}body.sidebar-open .sidebar{transform:translateX(0)}body.sidebar-open .sidebar-overlay{display:block}.main-content{margin-left:0;padding:16px}.mobile-topbar{display:flex}.hamburger{display:inline-flex}.card{padding:16px;border-radius:12px}.modal-content{padding:20px;border-radius:14px;max-height:90vh;overflow-y:auto;width:95vw!important}.notif-panel{left:12px!important;right:12px!important;width:auto!important;max-width:none!important;bottom:70px!important}.btn{padding:10px 16px}.btn-primary,.btn-secondary,td,th{font-size:13px}td,th{padding:10px 12px}.responsive-grid{grid-template-columns:1fr;gap:14px}.page-title{font-size:22px}.page-header{margin-bottom:18px;flex-direction:column;align-items:flex-start!important;gap:12px}.login-wrap{padding:24px 16px!important}.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:0 -16px;padding:0 16px}table{min-width:600px}.filter-row{flex-direction:column!important;gap:10px!important}.filter-row input,.filter-row select{width:100%!important;min-width:0!important}.course-grid{grid-template-columns:1fr!important}.test-option{padding:14px!important}.card{overflow-x:auto}.workbook-table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:0 -4px}.workbook-table-wrap table{min-width:500px}}@media (max-width:480px){.sidebar{width:85vw}.main-content{padding:12px}.stat-grid{gap:10px;grid-template-columns:1fr!important}.stat-card-value{font-size:22px!important}.stat-card{padding:14px!important;gap:12px!important}.stat-icon{width:40px!important;height:40px!important}.page-title{font-size:20px}.card{padding:14px}.btn-sm{padding:6px 10px;font-size:12px}.badge{font-size:10px;padding:2px 6px}.modal-content{padding:16px;margin:8px}.input{padding:10px 12px}.input,select.input,textarea.input{font-size:16px}.notif-panel{bottom:60px!important}}