:root{color-scheme:light;font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:#f8fafc;color:#0f172a}*{box-sizing:border-box}body{margin:0;min-height:100vh}button,input,textarea{font:inherit}.container{width:min(1180px,100% - 2rem);margin:0 auto;padding:2rem 0 4rem}.header{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:1rem;margin-bottom:2rem}.card{background:#fff;border:1px solid #e2e8f0;border-radius:16px;padding:1.5rem;box-shadow:0 12px 35px rgba(15,23,42,.08)}.grid{display:grid;gap:1.5rem}.grid-2{grid-template-columns:1.2fr .8fr}.form-group{display:grid;gap:.75rem;margin-bottom:1rem}label{font-weight:700}input,select,textarea{width:100%;padding:.85rem 1rem;border:1px solid #cbd5e1;border-radius:12px;background:#f8fafc}button{border:none;border-radius:12px;padding:.95rem 1.25rem;background:#2563eb;color:#fff;cursor:pointer}button:disabled{opacity:.6;cursor:not-allowed}.video-list{display:grid;gap:1rem;margin-top:1rem}.video-card{display:flex;gap:1rem;background:#f8fafc;border-radius:14px;padding:1rem;align-items:center}.video-card img{height:80px;width:140px;-o-object-fit:cover;object-fit:cover;border-radius:12px}.video-card div{flex:1}.module-pill{background:#e0f2fe;color:#0c4a6e;border-radius:999px;display:inline-flex;align-items:center;padding:.35rem .75rem;font-size:.85rem}.section-title{margin:0 0 1rem;font-size:1.25rem}.toast{margin-top:1rem;color:#ef4444}.note-box{background:#fff;padding:1rem;border-radius:14px;border:1px solid #e2e8f0;white-space:pre-wrap}