.course-hero{position:relative;background:linear-gradient(135deg,var(--color-ink),var(--color-navy));background-size:cover;background-position:center;padding:70px 0;color:#fff}.course-hero-cate{background:var(--color-primary);color:#fff;font-size:14px;font-weight:600;display:inline-block;border-radius:var(--radius-sm);padding:4px 12px 6px;margin-bottom:16px;margin-right:8px}.course-hero-cate--level{background:#ffffff29}.course-hero h1{color:#fff;font-size:clamp(28px,4vw,44px);margin-bottom:20px}.course-hero-meta{display:flex;gap:24px;flex-wrap:wrap;list-style:none;margin:0;padding:0;font-size:15px;color:#ffffffbf}.course-hero-meta li{display:flex;align-items:center;gap:8px}.course-hero-meta svg{width:18px;height:18px}.course-layout{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:40px;padding:60px 0 100px}.course-tabs{display:inline-flex;flex-wrap:wrap;background:var(--color-surface-alt);border-radius:var(--radius-md);padding:4px;margin-bottom:40px}.course-tab-btn{border:0;background:transparent;cursor:pointer;padding:14px 24px;font-size:14px;font-weight:600;color:var(--color-muted);border-radius:var(--radius-md);font-family:inherit}.course-tab-btn.is-active{background:#fff;color:var(--color-ink);box-shadow:var(--shadow-sm)}.course-section{background:var(--color-surface-alt-2);border-radius:var(--radius-md);padding:32px 36px 24px;margin-bottom:20px}.course-section-head{display:flex;justify-content:space-between;align-items:center;font-size:18px;font-weight:800;color:var(--color-navy);border-bottom:1px solid rgba(2,3,52,.08);padding-bottom:12px;margin-bottom:16px}.course-lesson{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid rgba(2,3,52,.08);color:var(--color-body)}.course-lesson:last-child{border-bottom:0}.course-lesson svg{width:18px;height:18px;color:var(--color-primary);flex-shrink:0}.course-outcome-list,.course-requirement-list{list-style:none;margin:0 0 24px;padding:0;display:grid;gap:12px}.course-outcome-list{grid-template-columns:repeat(2,1fr)}.course-outcome-list li{display:flex;align-items:flex-start;gap:10px;font-size:15px;color:var(--color-body)}.course-outcome-list svg{width:18px;height:18px;color:var(--color-primary);flex-shrink:0;margin-top:2px}.course-requirement-list li{font-size:15px;color:var(--color-body);padding-left:18px;position:relative}.course-requirement-list li:before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:var(--color-muted-soft)}@media(max-width:640px){.course-outcome-list{grid-template-columns:1fr}}.course-lesson-badge{margin-left:auto;font-size:11px;font-weight:700;padding:4px 10px;background:#3270fc14;color:var(--color-primary);border-radius:var(--radius-sm)}.course-lesson--preview{width:100%;background:none;border:0;border-bottom:1px solid rgba(2,3,52,.08);font-family:inherit;font-size:inherit;text-align:left;cursor:pointer;border-radius:var(--radius-sm);transition:background-color .15s ease}.course-lesson--preview:hover{background:var(--color-surface-alt)}.course-lesson--preview:last-child{border-bottom:0}.lesson-preview-overlay{position:fixed;inset:0;z-index:1000;display:grid;place-items:center;padding:24px}.lesson-preview-backdrop{position:absolute;inset:0;background:#0f1216b8}.lesson-preview-modal{position:relative;z-index:1;width:100%;max-width:720px;background:#fff;border-radius:var(--radius-lg);padding:20px;box-shadow:0 30px 60px #00000059}.lesson-preview-close{position:absolute;top:-14px;right:-14px;width:34px;height:34px;display:grid;place-items:center;border-radius:50%;background:#fff;border:0;box-shadow:0 6px 16px #0003;color:var(--color-ink);cursor:pointer}.lesson-preview-close svg{width:18px;height:18px}.lesson-preview-frame{position:relative;width:100%;aspect-ratio:16 / 9;background:#0b0f1a;border-radius:var(--radius-md);overflow:hidden}.lesson-preview-frame video{position:absolute;inset:0;width:100%;height:100%;-o-object-fit:contain;object-fit:contain;background:#0b0f1a}.lesson-preview-text{max-height:50vh;overflow-y:auto;padding:20px;background:var(--color-surface-alt);border-radius:var(--radius-md);font-size:15px;line-height:1.7;color:var(--color-body);white-space:pre-line}.lesson-preview-title{margin:14px 0 0;font-weight:700;color:var(--color-navy)}.course-sidebar{background:#fff;border-radius:var(--radius-md);box-shadow:0 30px 50px #010b3c1a;overflow:hidden;height:-moz-fit-content;height:fit-content;position:sticky;top:84px}@media(max-width:992px){.course-sidebar{position:static}}.course-description{color:var(--color-body);line-height:1.7}.course-description :is(h1,h2,h3,h4){margin-top:28px}.course-description p{margin:0 0 16px}.course-description ul,.course-description ol{margin:0 0 16px;padding-left:22px}.course-description a{color:var(--color-primary);text-decoration:underline}.course-description img{max-width:100%;border-radius:var(--radius-md)}.course-sidebar-price{display:flex;align-items:baseline;gap:10px;padding:25px 32px;border-bottom:1px solid var(--color-border);font-size:30px;font-weight:700;color:var(--color-primary)}.course-sidebar-price .free-tag{font-size:20px}.course-sidebar-price-original{font-size:18px;font-weight:600;color:var(--color-muted-soft);text-decoration:line-through}.course-sidebar-list{list-style:none;margin:0;padding:20px 32px 0}.course-sidebar-list li{display:flex;justify-content:space-between;padding:10px 0;box-shadow:0 1px 0 var(--color-border);font-size:15px;color:var(--color-ink)}.course-sidebar-list li b{font-weight:400;color:var(--color-muted)}.course-sidebar .btn{display:block;margin:25px 32px;text-align:center}.course-sidebar-enrolled{display:flex;align-items:center;justify-content:center;gap:8px;margin:25px 32px;padding:13px 28px;border-radius:var(--radius-md);background:#2ea0431a;color:#2ea043;font-weight:600;font-size:16px}.course-sidebar-enrolled svg{width:18px;height:18px}.course-sidebar-share{display:flex;align-items:center;justify-content:space-between;padding:20px 32px;border-top:1px solid var(--color-border);font-size:14px;font-weight:600;color:var(--color-navy)}.course-sidebar-share-icons{display:flex;gap:8px}.course-sidebar-share-icons a{display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--color-surface-alt);color:var(--color-muted);transition:background-color .15s ease,color .15s ease}.course-sidebar-share-icons a:hover{background:var(--color-primary);color:#fff}.course-sidebar-share-icons svg{width:16px;height:16px}@media(max-width:992px){.course-layout{grid-template-columns:1fr}}