:root {
  --bg: #fbfbfd; --bg2: #f5f5f7; --card: #fff; --text: #1d1d1f; --muted: #6e6e73;
  --line: rgba(0,0,0,.08); --accent: #0071e3; --accent-soft: rgba(0,113,227,.1);
  --hl: rgba(255,214,10,.45); --shadow: 0 2px 6px rgba(0,0,0,.04), 0 12px 32px rgba(0,0,0,.06);
  --nav: rgba(251,251,253,.72); --r: 18px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", "Segoe UI", system-ui, sans-serif;
  --display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", system-ui, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, monospace;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000; --bg2: #111113; --card: #1c1c1e; --text: #f5f5f7; --muted: #a1a1a6;
    --line: rgba(255,255,255,.12); --accent: #2997ff; --accent-soft: rgba(41,151,255,.16);
    --hl: rgba(255,214,10,.3); --shadow: none; --nav: rgba(22,22,23,.72);
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 72px; }
body { margin: 0; background: var(--bg); color: var(--text); font: 17px/1.47 var(--font); letter-spacing: -.022em; -webkit-font-smoothing: antialiased; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button { font: inherit; color: inherit; cursor: pointer; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 6px; }
.skip { position: absolute; left: -999px; } .skip:focus { left: 12px; top: 12px; z-index: 99; background: var(--card); padding: 8px 12px; }

/* nav */
.nav { position: sticky; top: 0; z-index: 20; background: var(--nav); backdrop-filter: saturate(180%) blur(20px); -webkit-backdrop-filter: saturate(180%) blur(20px); border-bottom: 1px solid var(--line); }
.nav-in { max-width: 1200px; margin: 0 auto; height: 52px; padding: 0 22px; display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); font-weight: 600; font-size: 15px; }
.brand:hover { text-decoration: none; }
.brand-mark { width: 26px; height: 26px; border-radius: 7px; display: grid; place-items: center; background: linear-gradient(135deg,#5e5ce6,#0a84ff); color: #fff; font-size: 14px; font-weight: 700; }
.nav nav { display: flex; align-items: center; gap: 22px; font-size: 14px; }
.nav nav a { color: var(--text); opacity: .8; } .nav nav a:hover { opacity: 1; text-decoration: none; }
.search-btn { display: flex; align-items: center; gap: 8px; border: 0; background: var(--bg2); border-radius: 999px; padding: 6px 12px; font-size: 14px; color: var(--muted); }
.search-btn kbd { font: 12px var(--font); opacity: .7; }
@media (max-width: 600px) { .search-btn span, .search-btn kbd, .brand span:last-child { display: none; } }

/* layout */
main { max-width: 1200px; margin: 0 auto; padding: 0 22px 80px; min-height: 70vh; outline: none; }
.loading { padding: 120px 0; text-align: center; color: var(--muted); }
.foot { border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.foot div { max-width: 1200px; margin: 0 auto; padding: 20px 22px; }
.eyebrow { font-size: 14px; font-weight: 600; color: var(--muted); margin: 0 0 6px; letter-spacing: -.01em; }
h1, h2, h3 { font-family: var(--display); letter-spacing: -.03em; margin: 0; }
h1 { font-size: clamp(40px, 7vw, 72px); line-height: 1.04; font-weight: 700; }
h2 { font-size: clamp(26px, 3.4vw, 34px); line-height: 1.12; font-weight: 700; }
h3 { font-size: 19px; font-weight: 600; letter-spacing: -.02em; }
.section { margin-top: 72px; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 16px; margin-bottom: 20px; }
.muted { color: var(--muted); }

/* hero */
.hero { text-align: center; padding: 88px 0 24px; }
.hero p.lead { font-size: clamp(19px, 2.4vw, 24px); color: var(--muted); max-width: 640px; margin: 18px auto 0; line-height: 1.35; }
.hero-search { margin: 36px auto 0; max-width: 620px; display: flex; align-items: center; gap: 12px; width: 100%; background: var(--card); border: 1px solid var(--line); border-radius: 999px; padding: 14px 22px; box-shadow: var(--shadow); color: var(--muted); font-size: 17px; text-align: left; }
.hero-search:hover { border-color: var(--accent); }
.stats { display: flex; justify-content: center; gap: 44px; margin-top: 40px; flex-wrap: wrap; }
.stat strong { display: block; font: 700 32px/1 var(--display); letter-spacing: -.03em; }
.stat span { font-size: 13px; color: var(--muted); }

/* year tiles */
.years { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
.year { background: var(--card); border-radius: var(--r); padding: 18px 18px 16px; color: var(--text); box-shadow: var(--shadow); border: 1px solid var(--line); transition: transform .2s ease; }
.year:hover { transform: translateY(-2px); text-decoration: none; }
.year strong { font: 700 28px/1.1 var(--display); letter-spacing: -.03em; display: block; }
.year span { font-size: 13px; color: var(--muted); }
.bar { height: 4px; border-radius: 4px; background: var(--bg2); margin-top: 12px; overflow: hidden; }
.bar i { display: block; height: 100%; background: var(--accent); border-radius: 4px; }

/* video cards / rows */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }
.card { background: var(--card); border-radius: var(--r); padding: 22px; color: var(--text); box-shadow: var(--shadow); border: 1px solid var(--line); display: flex; flex-direction: column; gap: 8px; transition: transform .2s ease; }
.card:hover { transform: translateY(-2px); text-decoration: none; }
.card .meta { font-size: 13px; color: var(--muted); display: flex; gap: 8px; flex-wrap: wrap; }
.card p { margin: 0; font-size: 15px; color: var(--muted); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.pill { display: inline-flex; align-items: center; gap: 4px; font-size: 12px; font-weight: 500; padding: 2px 8px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); }
.list { background: var(--card); border-radius: var(--r); border: 1px solid var(--line); box-shadow: var(--shadow); overflow: hidden; }
.row { display: grid; grid-template-columns: 64px 1fr auto; gap: 16px; align-items: baseline; padding: 14px 20px; color: var(--text); border-top: 1px solid var(--line); }
.row:first-child { border-top: 0; }
.row:hover { background: var(--bg2); text-decoration: none; }
.row .d { font-size: 13px; color: var(--muted); font-variant-numeric: tabular-nums; }
.row .x { font-size: 13px; color: var(--muted); font-variant-numeric: tabular-nums; display: flex; gap: 8px; align-items: center; }
.row .s { display: block; font-size: 14px; color: var(--muted); margin-top: 2px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.row > span:nth-child(2) { min-width: 0; }
.page-head .eyebrow { font-size: 14px; margin: 0 0 6px; }
@media (max-width: 600px) { .row { grid-template-columns: 1fr auto; } .row .d { grid-column: 1 / -1; } }
.month { margin-top: 40px; }
.month h3 { margin-bottom: 12px; }
.chips { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 18px; }
.chip { padding: 6px 14px; border-radius: 999px; background: var(--bg2); color: var(--text); font-size: 14px; border: 0; }
.chip:hover { text-decoration: none; background: var(--accent-soft); color: var(--accent); }
.chip[aria-current="true"] { background: var(--text); color: var(--bg); }
.page-head { padding: 64px 0 8px; }
.page-head p { color: var(--muted); font-size: 19px; margin: 12px 0 0; }

/* video page */
.crumbs { font-size: 13px; color: var(--muted); padding-top: 28px; display: flex; gap: 6px; flex-wrap: wrap; }
.v-head { padding: 18px 0 24px; }
.v-head h1 { font-size: clamp(30px, 4.6vw, 48px); line-height: 1.08; }
.v-head .meta { color: var(--muted); margin-top: 10px; font-size: 15px; }
.player { background: #000; border-radius: var(--r); overflow: hidden; aspect-ratio: 16 / 9; box-shadow: var(--shadow); }
.player video { width: 100%; height: 100%; display: block; }
.v-grid { display: grid; grid-template-columns: minmax(0, 1.65fr) minmax(320px, 1fr); gap: 24px; align-items: start; }
@media (max-width: 960px) { .v-grid { grid-template-columns: 1fr; } }
.panel { background: var(--card); border-radius: var(--r); border: 1px solid var(--line); box-shadow: var(--shadow); padding: 24px; }
.panel + .panel { margin-top: 16px; }
.panel h2 { font-size: 21px; margin-bottom: 10px; }
.panel p { margin: 0; color: var(--text); }
.prevnext { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 16px; }
.prevnext a { background: var(--bg2); border-radius: 14px; padding: 12px 16px; color: var(--text); font-size: 14px; }
.prevnext a:hover { text-decoration: none; background: var(--accent-soft); }
.prevnext small { display: block; color: var(--muted); font-size: 12px; }
.prevnext .next { text-align: right; }
details.tech summary { cursor: pointer; font-weight: 600; }
details.tech dl { display: grid; grid-template-columns: auto 1fr; gap: 6px 16px; font-size: 13px; margin: 14px 0 0; }
details.tech dt { color: var(--muted); } details.tech dd { margin: 0; word-break: break-all; }

/* transcript */
.tx { position: sticky; top: 68px; display: flex; flex-direction: column; max-height: calc(100vh - 88px); padding: 0; overflow: hidden; }
@media (max-width: 960px) { .tx { position: static; max-height: 80vh; } }
.tx-top { padding: 20px 20px 12px; border-bottom: 1px solid var(--line); }
.tx-title { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.tx-title h2 { margin: 0; }
.tx-tools { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; align-items: center; }
.btn { display: inline-flex; align-items: center; gap: 6px; border: 0; border-radius: 999px; padding: 7px 14px; font-size: 14px; font-weight: 500; background: var(--accent); color: #fff; }
.btn:hover { filter: brightness(1.08); }
.btn.alt { background: var(--bg2); color: var(--text); }
.btn.alt:hover { background: var(--accent-soft); color: var(--accent); filter: none; }
.toggle { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); margin-left: auto; cursor: pointer; user-select: none; }
.toggle input { appearance: none; width: 36px; height: 22px; border-radius: 999px; background: var(--line); position: relative; margin: 0; cursor: pointer; transition: background .2s; }
.toggle input::after { content: ""; position: absolute; top: 2px; left: 2px; width: 18px; height: 18px; border-radius: 50%; background: #fff; box-shadow: 0 1px 3px rgba(0,0,0,.3); transition: transform .2s; }
.toggle input:checked { background: #34c759; } .toggle input:checked::after { transform: translateX(14px); }
.tx-find { width: 100%; margin-top: 12px; border: 1px solid var(--line); background: var(--bg2); color: var(--text); border-radius: 10px; padding: 8px 12px; font: 15px var(--font); }
.tx-body { overflow-y: auto; padding: 8px 8px 20px; overscroll-behavior: contain; }
.seg { display: grid; grid-template-columns: 62px 1fr 28px; gap: 6px; align-items: start; padding: 6px 8px; border-radius: 10px; }
.seg:hover { background: var(--bg2); }
.seg.now { background: var(--accent-soft); }
.seg .ts { font: 12px/1.9 var(--mono); color: var(--accent); background: none; border: 0; padding: 0; text-align: left; user-select: none; -webkit-user-select: none; }
.seg .tt { font-size: 15.5px; line-height: 1.55; }
.seg .cp { opacity: 0; border: 0; background: none; color: var(--muted); padding: 2px; border-radius: 6px; user-select: none; -webkit-user-select: none; }
.seg:hover .cp, .seg .cp:focus-visible { opacity: 1; } .seg .cp:hover { color: var(--accent); }
@media (hover: none) { .seg .cp { opacity: .6; } }
mark { background: var(--hl); color: inherit; border-radius: 3px; padding: 0 1px; }
.tx-empty { padding: 28px 20px; color: var(--muted); }

/* search dialog */
dialog.search { width: min(720px, calc(100vw - 24px)); max-height: min(78vh, 760px); margin: 9vh auto auto; padding: 0; border: 1px solid var(--line); border-radius: 20px; background: var(--card); color: var(--text); box-shadow: 0 30px 80px rgba(0,0,0,.25); overflow: hidden; }
dialog.search[open] { display: flex; flex-direction: column; }
dialog::backdrop { background: rgba(0,0,0,.32); backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }
.search-bar { display: flex; align-items: center; gap: 12px; padding: 16px 20px; border-bottom: 1px solid var(--line); color: var(--muted); }
.search-bar input { flex: 1; border: 0; outline: 0; background: none; color: var(--text); font: 19px var(--font); letter-spacing: -.02em; }
.search-bar input::-webkit-search-cancel-button { display: none; }
.text-btn { border: 0; background: var(--bg2); border-radius: 6px; font-size: 12px; padding: 3px 8px; color: var(--muted); }
.results { overflow-y: auto; padding: 8px; }
.res-group { font-size: 12px; font-weight: 600; color: var(--muted); padding: 12px 12px 6px; text-transform: uppercase; letter-spacing: .02em; }
.res { display: block; padding: 10px 12px; border-radius: 12px; color: var(--text); }
.res:hover, .res[aria-selected="true"] { background: var(--accent-soft); text-decoration: none; }
.res small { color: var(--muted); font-size: 13px; }
.res .snip { display: block; font-size: 14px; color: var(--muted); margin-top: 2px; }
.res .hit { display: flex; gap: 10px; font-size: 14px; margin-top: 4px; color: var(--text); }
.res .hit b { font: 12px/1.7 var(--mono); color: var(--accent); font-weight: 400; flex: none; }
.res-note { padding: 16px 12px; color: var(--muted); font-size: 14px; }

.toast { position: fixed; left: 50%; bottom: 28px; transform: translate(-50%, 20px); opacity: 0; background: rgba(29,29,31,.92); color: #fff; padding: 10px 18px; border-radius: 999px; font-size: 14px; pointer-events: none; transition: all .25s ease; z-index: 50; backdrop-filter: blur(10px); }
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.prose { max-width: 680px; }
.prose p { font-size: 19px; line-height: 1.55; color: var(--text); }
.prose h2 { margin-top: 44px; font-size: 26px; }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }