.course-selection-section{margin-bottom:32px}.section-title-wrap{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;margin-bottom:16px}.section-subtitle{font-size:18px;font-weight:800;color:var(--text);margin:0}.course-count-tag{font-size:13px;color:var(--gold);background:#ffd70014;border:1px solid rgba(255,215,0,.2);padding:4px 12px;border-radius:999px;font-weight:600}.course-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}.course-card{display:flex;flex-direction:column;text-align:left;background:#0d0b1aa6;border:1px solid var(--border);border-radius:var(--r-lg, 12px);padding:20px;cursor:pointer;transition:all var(--t-med, .3s) ease;position:relative;overflow:hidden;color:var(--text);font-family:inherit;width:100%}.course-card:hover{border-color:#ffd70066;transform:translateY(-2px);box-shadow:0 8px 24px #0006,0 0 12px #ffd70014}.course-card.is-active{border-color:var(--gold);background:#ffd7000d;box-shadow:0 0 20px #ffd70026}.course-card-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}.course-icon{font-size:28px;line-height:1}.course-badge{font-size:12px;font-weight:700;padding:4px 10px;border-radius:999px;line-height:1;display:inline-block}.badge-active{background:#3ecf8e26;color:#3ecf8e;border:1px solid rgba(62,207,142,.35)}.badge-soon{background:#ffd7001a;color:var(--gold);border:1px solid rgba(255,215,0,.25)}.course-title{font-size:16.5px;font-weight:700;color:var(--text);margin:0 0 8px;line-height:1.4}.course-desc{font-size:13px;color:var(--text-dim);line-height:1.55;margin:0 0 16px;flex:1;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.course-footer{display:flex;justify-content:space-between;align-items:center;padding-top:12px;border-top:1px solid rgba(255,255,255,.07);margin-top:auto}.course-meta{font-size:12.5px;color:var(--gold);font-weight:600}.course-select-btn{font-size:13px;font-weight:700;color:var(--text);display:flex;align-items:center;gap:4px;transition:color var(--t-fast)}.course-card.is-active .course-select-btn{color:var(--gold)}.course-content-panel{position:relative}.course-detail-header{margin-bottom:24px;padding-bottom:18px;border-bottom:1px solid var(--border)}.course-tag-row{display:flex;align-items:center;gap:12px;margin-bottom:12px;flex-wrap:wrap}.course-back-btn{display:inline-flex;align-items:center;gap:6px;background:#ffd70014;border:1px solid rgba(255,215,0,.25);color:var(--gold);padding:5px 12px;border-radius:var(--r-md, 8px);font-size:13px;font-weight:600;cursor:pointer;transition:all var(--t-fast, .2s ease);font-family:inherit}.course-back-btn:hover{background:#ffd7002e;border-color:var(--gold);transform:translate(-2px)}.course-category-tag{font-size:12px;font-weight:700;letter-spacing:.05em;color:var(--gold);text-transform:uppercase;margin-left:auto}.course-detail-title{font-size:22px;font-weight:800;color:var(--gold);margin:0 0 8px}.course-detail-desc{font-size:14px;color:var(--text-dim);line-height:1.6;margin:0}.lesson-progress{margin-bottom:22px;padding:16px 18px;border:1px solid rgba(255,215,0,.25);border-radius:var(--r-md);background:#ffd7000a}.lesson-progress-head{display:flex;justify-content:space-between;align-items:baseline;gap:12px;margin-bottom:10px;flex-wrap:wrap}.lesson-progress-label{font-size:13.5px;font-weight:700;color:var(--text)}.lesson-progress-value{font-size:16px;font-weight:800;color:var(--gold);font-variant-numeric:tabular-nums}.lesson-progress-value .muted{font-size:13px;font-weight:500}.lesson-progress-track{height:10px;border-radius:999px;background:#ffffff14;overflow:hidden}.lesson-progress-fill{height:100%;border-radius:999px;background:linear-gradient(90deg,#f2c94c,gold);transition:width var(--t-med, .4s) ease}.lesson-section-title{font-size:18px;font-weight:800;color:var(--gold);line-height:1.5;margin:28px 0 14px;padding-bottom:8px;border-bottom:1px solid rgba(255,215,0,.22)}.lesson-section-title:first-of-type{margin-top:4px}.lesson-section-title-muted{color:var(--text-dim);border-bottom-color:var(--border)}.lesson-list{display:flex;flex-direction:column;gap:12px}.lesson-row{display:flex;align-items:center;gap:16px;padding:16px 18px;border:1px solid var(--border);border-radius:var(--r-md);background:#0d0b1a8c;text-decoration:none;color:var(--text);transition:border-color var(--t-fast),transform var(--t-fast),box-shadow var(--t-fast)}.lesson-row:hover{border-color:#ffd70059;transform:translate(3px);box-shadow:var(--shadow-card)}.lesson-no{flex-shrink:0;font-size:20px;font-weight:800;color:var(--gold);font-variant-numeric:tabular-nums;width:40px;text-align:center}.lesson-no-done{color:#3ecf8e}.lesson-row.is-done{border-color:#3ecf8e59;background:#3ecf8e0f}.lesson-no-locked{font-size:16px}.lesson-row.is-locked{opacity:.55;cursor:not-allowed}.lesson-row.is-locked:hover{transform:none;box-shadow:none;border-color:var(--border)}.lesson-row-locked-hint{font-size:12px;color:var(--text-dim);font-style:italic}.lesson-row-body{display:flex;flex-direction:column;gap:4px;flex:1;min-width:0}.lesson-row-title{font-size:16px;font-weight:700;line-height:1.4}.lesson-row-summary{font-size:13px;line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.lesson-row-arrow{flex-shrink:0;color:var(--gold);font-size:18px;opacity:.7}