body { line-height: 1.5; }
.page { max-width: 1320px; margin: 0 auto; padding: 0 48px; }
.site-header { display: flex; align-items: center; justify-content: space-between; padding: 30px 0; border-bottom: 1px solid var(--line); }
.site-header img { display: block; object-fit: contain; object-position: left center; }
.header-label { font-size: 13px; color: var(--muted); }
.intro { padding: 54px 0 32px; max-width: 770px; }
.eyebrow { margin: 0 0 12px; color: var(--accent-deep); font-size: 12px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; }
h1 { font-size: clamp(32px, 4.5vw, 54px); letter-spacing: -.045em; line-height: 1.1; margin: 0 0 18px; font-weight: 600; }
.lead { font-size: 18px; color: var(--muted); max-width: 620px; margin: 0 0 22px; }
.metadata { display: flex; flex-wrap: wrap; gap: 8px 20px; list-style: none; padding: 0; margin: 0; color: var(--muted); font-size: 12px; }
.metadata li + li::before { content: '·'; margin-right: 20px; }
.course { display: grid; grid-template-columns: minmax(0, 1fr) 282px; gap: 32px; align-items: start; }
.watch { min-width: 0; }
.video-wrap { background: var(--ink); border-radius: 14px; overflow: hidden; display: flex; justify-content: center; }
video { width: 100%; display: block; aspect-ratio: 16 / 9; }
.video-wrap[data-format="portrait"] video { width: auto; max-width: 100%; height: min(70vh, 720px); aspect-ratio: 9 / 16; }
.player-toolbar { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 14px; margin-top: 16px; }
.formats { display: flex; gap: 3px; padding: 3px; border: 1px solid var(--line); border-radius: 9px; }
button { font: inherit; cursor: pointer; }
.formats button { border: 0; border-radius: 6px; background: transparent; color: var(--muted); font-size: 12px; padding: 8px 12px; }
.formats button[aria-pressed="true"] { background: var(--ink); color: var(--bg); }
button:disabled { opacity: .6; cursor: wait; }
.player-toolbar a { color: var(--ink); font-size: 12px; text-decoration: underline; text-underline-offset: 4px; }
.player-toolbar a span { margin-left: 5px; }
.context, .player-error { font-size: 12px; color: var(--muted); margin: 18px 0 0; max-width: 620px; }
.player-error { color: var(--danger); }
.chapters { padding: 22px 20px; background: var(--surface); border: 1px solid var(--line); border-radius: 14px; }
h2 { margin: 0; font-size: 19px; letter-spacing: -.025em; font-weight: 600; }
.chapters > p { margin: 4px 0 18px; color: var(--muted); font-size: 12px; }
.chapters ol { list-style: none; margin: 0; padding: 0; }
.chapters button { display: flex; gap: 13px; align-items: baseline; width: 100%; text-align: left; padding: 12px 8px; border: 0; border-radius: 6px; background: transparent; font-size: 12px; color: var(--ink); }
.chapters button:hover { background: var(--bg); }
.chapters button[aria-current="true"] { background: var(--accent-soft); }
.chapter-time { color: var(--muted); font-family: var(--mono); font-size: 10px; flex-shrink: 0; }
a:focus-visible, button:focus-visible, video:focus-visible { outline: 3px solid var(--accent-deep); outline-offset: 4px; }
.practice { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin: 40px 0; padding: 28px 30px; border-radius: 14px; background: #eae7db; }
.practice p { color: var(--muted); margin: 6px 0 0; font-size: 14px; }
.practice-mark { font-size: 40px; line-height: 1; color: var(--accent-deep); }
footer { border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; gap: 8px 24px; justify-content: space-between; padding: 24px 0 32px; font-size: 11px; color: var(--muted); }
.back { padding-top: 26px; font-size: 12px; }
.back a, .more-lessons a { color: var(--muted); }
.lesson-intro { padding-top: 24px; max-width: 980px; }
.practice ol { margin: 10px 0 0; padding-left: 20px; color: var(--muted); font-size: 14px; }
.practice li { margin: 5px 0; }
.transcript { border: 1px solid var(--line); border-radius: 12px; padding: 18px 22px; margin: 0 0 24px; }
.transcript summary { cursor: pointer; font-size: 14px; font-weight: 500; }
.transcript > div { max-width: 800px; padding-top: 12px; }
.transcript h3 { font-size: 16px; margin: 24px 0 6px; }
.transcript p { font-size: 14px; color: var(--muted); margin: 0 0 16px; }
.more-lessons { font-size: 13px; margin: 28px 0 40px; }
.gallery-intro { max-width: 900px; padding-bottom: 24px; }
.course-jumps { display: flex; gap: 8px; flex-wrap: wrap; margin: 0 0 48px; }
.course-jumps a { color: var(--ink); border: 1px solid var(--line); border-radius: 99px; padding: 9px 16px; font-size: 12px; }
.course-jumps a:hover { background: var(--surface); }
.lesson-section { margin: 0 0 48px; scroll-margin-top: 24px; }
.section-heading { margin-bottom: 22px; }
.section-heading h2 { font-size: 25px; }
.section-heading p { margin: 5px 0 0; color: var(--muted); font-size: 14px; }
.lesson-grid { display: grid; grid-template-columns: repeat(auto-fit,minmax(240px,1fr)); gap: 18px; }
.lesson-card { border: 1px solid var(--line); border-radius: 14px; background: var(--surface); overflow: hidden; color: var(--ink); display: flex; flex-direction: column; }
.lesson-card:hover { border-color: var(--muted); }
.lesson-picture { position: relative; background: #eee8dc; }
.lesson-picture img { width: 100%; height: auto; aspect-ratio: 16/9; display: block; }
.lesson-duration { position: absolute; bottom: 10px; right: 10px; font: 11px var(--mono); background: var(--ink); color: var(--bg); padding: 4px 7px; border-radius: 5px; }
.lesson-copy { padding: 20px; display: flex; flex-direction: column; flex: 1; }
.lesson-code { font-size: 10px; color: var(--muted); letter-spacing: .025em; }
.lesson-copy h3 { font-size: 20px; line-height: 1.2; letter-spacing: -.025em; font-weight: 600; margin: 10px 0; }
.lesson-copy p { font-size: 13px; color: var(--muted); margin: 0 0 22px; }
.watch-label { display: flex; justify-content: space-between; margin-top: auto; font-size: 12px; color: var(--accent-deep); font-weight: 500; }
.single .lesson-card { flex-direction: row; max-width: 790px; }
.single .lesson-picture { width: 45%; align-self: center; flex-shrink: 0; }
.course-note { border-top: 1px solid var(--line); padding: 30px 0 40px; max-width: 850px; }
.course-note p { color: var(--muted); font-size: 14px; margin: 8px 0 0; }
@media (max-width: 900px) {
  .page { padding: 0 24px; }
  .course { grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .chapters ol { display: grid; grid-template-columns: 1fr 1fr; gap: 0 20px; }
  .intro { padding-top: 38px; }
}
@media (max-width: 520px) {
  .page { padding: 0 18px; }
  .site-header { padding: 20px 0; }
  .site-header img { width: 133px; height: 40px; }
  .intro { padding: 30px 0 24px; }
  .lead { font-size: 16px; }
  .metadata { gap: 8px 12px; font-size: 11px; }
  .metadata li + li::before { margin-right: 12px; }
  .chapters ol { grid-template-columns: 1fr; }
  .chapters button { font-size: 13px; padding: 13px 8px; }
  .practice { padding: 24px; margin: 28px 0; }
  .lesson-intro { padding-top: 20px; }
  .lesson-grid { grid-template-columns: minmax(0,1fr); }
  .single .lesson-card { flex-direction: column; }
  .single .lesson-picture { width: 100%; }
  .course-jumps { margin-bottom: 32px; }
  .lesson-section { margin-bottom: 32px; }
  .section-heading h2 { font-size: 23px; }
}