/* Learn (knowledge base) pages */
.lv-hero { padding-bottom: 48px; }
.lv-lede { font-size: clamp(17px, 1.7vw, 20px); color: var(--ink-2); max-width: 44em; margin: 16px 0 0; }
.lv-grid { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 24px; margin-top: 28px; align-items: start; }
.lv-player { position: relative; aspect-ratio: 16 / 9; max-width: 100%; border: 3px solid var(--ink); border-radius: 22px; overflow: hidden; background: #000; box-shadow: 8px 8px 0 var(--yellow); }
.lv-player iframe, .lv-poster { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.lv-poster { padding: 0; background: #000; cursor: pointer; }
.lv-poster img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .4s; }
.lv-poster:hover img { transform: scale(1.02); }
.lv-play { position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); width: 86px; height: 86px; border-radius: 50%; background: var(--yellow); border: 3px solid var(--ink); display: flex; align-items: center; justify-content: center; box-shadow: 5px 5px 0 var(--ink); transition: transform .2s; }
.lv-poster:hover .lv-play { transform: translate(-50%, -50%) scale(1.06); }
.lv-play.sm { width: 54px; height: 54px; box-shadow: 3px 3px 0 var(--ink); }
.lv-chapters { background: #fff; border: 1px solid var(--line); border-radius: 20px; padding: 18px; }
.lv-chapters h2 { font-size: 18px; margin: 0 0 8px; }
.lv-chapters ol { list-style: none; padding: 0; margin: 0 0 14px; display: flex; flex-direction: column; }
.lv-chapters button { display: flex; gap: 10px; width: 100%; text-align: left; background: none; border: 0; padding: 8px 6px; border-radius: 10px; cursor: pointer; font-size: 14.5px; color: var(--ink-2); }
.lv-chapters button:hover, .lv-chapters button.on { background: var(--mist-2); color: var(--ink); }
.lv-chapters .mono { color: var(--green); font-weight: 600; min-width: 34px; }
.lv-cta { width: 100%; justify-content: center; }
.lv-note { font-size: 13px; text-align: center; margin: 8px 0 0; }
.lv-answer { margin-top: 28px; max-width: 900px; }
.lv-body { padding-block: 24px 8px; }
.lv-article { max-width: 820px; }
.lv-article h2, .lv-sec { font-size: clamp(26px, 3vw, 34px); margin: 40px 0 16px; }
.lv-steps { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 14px; }
.lv-steps li { display: flex; gap: 16px; background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 16px 18px; }
.lv-steps h3 { font-size: 19px; margin: 2px 0 6px; }
.lv-steps p { margin: 0; color: var(--ink-2); }
.lv-jump { background: var(--yellow-t); border: 1.5px solid var(--ink); border-radius: 10px; padding: 4px 9px; font: 600 13px var(--mono); cursor: pointer; height: fit-content; color: var(--ink); }
.lv-jump:hover { background: var(--yellow); }
.lv-transcript p { margin: 0 0 10px; color: var(--ink-2); }
.lv-transcript .lv-jump { margin-right: 6px; }
.lv-faq details { background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 14px 18px; margin-bottom: 10px; }
.lv-faq summary { font-weight: 700; cursor: pointer; }
.lv-faq p { margin: 10px 0 0; color: var(--ink-2); }
.lv-links { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.lv-links a { display: flex; flex-direction: column; gap: 2px; background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 14px 16px; text-decoration: none; color: var(--ink); transition: border-color .2s, box-shadow .2s, transform .2s; }
.lv-links a:hover { border-color: var(--ink); box-shadow: 4px 4px 0 var(--yellow); transform: translateY(-2px); }
.lv-links span { color: var(--muted); font-size: 14px; }
.lv-cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.lv-card { display: flex; flex-direction: column; gap: 8px; text-decoration: none; color: var(--ink); background: #fff; border: 1px solid var(--line); border-radius: 20px; padding: 12px 12px 16px; transition: border-color .2s, box-shadow .2s, transform .2s; }
.lv-card:hover { border-color: var(--ink); box-shadow: 5px 5px 0 var(--yellow); transform: translateY(-3px); }
.lv-thumb { position: relative; display: block; aspect-ratio: 16 / 9; border-radius: 14px; overflow: hidden; background: #000; }
.lv-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.lv-dur { position: absolute; right: 8px; bottom: 8px; background: rgba(15,21,18,.85); color: #fff; font-size: 12px; padding: 2px 7px; border-radius: 6px; }
.lv-tag { font: 600 12px var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--green); padding: 0 4px; }
.lv-card b { font-family: var(--display); font-size: 19px; line-height: 1.2; padding: 0 4px; }
.lv-card .muted { font-size: 14px; padding: 0 4px; }
@media (max-width: 960px) { .lv-grid { grid-template-columns: minmax(0, 1fr); } .lv-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 600px) { .lv-cards, .lv-links { grid-template-columns: minmax(0, 1fr); } .lv-player { border-radius: 16px; box-shadow: 5px 5px 0 var(--yellow); } .lv-steps li { flex-direction: column; gap: 8px; } }
.lv-code { background: var(--ink, #0F1512); color: #E8F6EC; border-radius: 14px; padding: 18px 20px; overflow-x: auto; font: 500 14px/1.6 "IBM Plex Mono", ui-monospace, monospace; margin: 14px 0; }
.lv-code code { white-space: pre; }