/* =====================================================================
   ETS HUB LAYER (v2, 2026-10-01)
   Extends the XP editorial system (xp.css). Every color below resolves to
   an --xp-* token or a --hub-* token defined here. NO raw hex in components.
   Surfaces re-map automatically inside .xp-sec--paper and under .theme-dark.
   Prefixes: hb- (generic), bk- (book), vd- (video), wall- (proof walls),
   rd- (reader), manual- (docs).
   ===================================================================== */

.xp {
  --hub-ink: var(--xp-ink);
  --hub-strong: #fff;
  --hub-mute: var(--xp-mute);
  --hub-dim: var(--xp-dim);
  --hub-line: var(--xp-line);
  --hub-line-2: rgba(148,163,184,.26);
  --hub-surface: rgba(255,255,255,.028);
  --hub-surface-2: rgba(255,255,255,.055);
  --hub-surface-hover: rgba(46,230,211,.06);
  --hub-accent: var(--xp-teal);
  --hub-accent-ink: #03211e;
  --hub-accent-soft: rgba(46,230,211,.12);
  --hub-accent-line: rgba(46,230,211,.38);
  --hub-amber: var(--xp-amber);
  --hub-rose: var(--xp-rose);
  --hub-shadow: 0 40px 90px -45px rgba(0,0,0,.9);
  --hub-radius: 18px;
}
.xp .xp-sec--paper {
  --hub-ink: var(--xp-ink-dark);
  --hub-strong: var(--xp-ink-dark);
  --hub-mute: #4a566b;
  --hub-dim: #6b778c;
  --hub-line: rgba(11,18,32,.12);
  --hub-line-2: rgba(11,18,32,.2);
  --hub-surface: #fbfaf7;
  --hub-surface-2: #fff;
  --hub-surface-hover: #fff;
  --hub-accent: #0b8f84;
  --hub-accent-ink: #fff;
  --hub-accent-soft: rgba(11,143,132,.08);
  --hub-accent-line: rgba(11,143,132,.35);
  --hub-shadow: 0 30px 70px -45px rgba(11,18,32,.45);
}
.theme-dark .xp .xp-sec--paper {
  --hub-ink: var(--xp-ink); --hub-strong: #fff; --hub-mute: #a9b7c8; --hub-dim: var(--xp-dim);
  --hub-line: var(--xp-line); --hub-line-2: rgba(148,163,184,.26);
  --hub-surface: #0a111c; --hub-surface-2: #0d1624; --hub-surface-hover: #101b2b;
  --hub-accent: var(--xp-teal); --hub-accent-ink: #03211e; --hub-accent-soft: rgba(46,230,211,.12); --hub-accent-line: rgba(46,230,211,.38);
}

/* ---------- generic building blocks ---------- */
.hb-card { display: flex; flex-direction: column; gap: .55rem; padding: 1.4rem 1.5rem; border-radius: var(--hub-radius); border: 1px solid var(--hub-line); background: var(--hub-surface); color: var(--hub-ink); text-decoration: none !important; transition: border-color .25s, background .25s, transform .25s; position: relative; min-width: 0; }
a.hb-card:hover { border-color: var(--hub-accent-line); background: var(--hub-surface-hover); transform: translateY(-2px); }
.hb-card h3, .hb-card strong.hb-t { font: 500 1.22rem/1.25 var(--xp-serif); color: var(--hub-strong); margin: 0; letter-spacing: -.01em; }
.hb-card p { margin: 0; font-size: .93rem; line-height: 1.6; color: var(--hub-mute); }
.hb-k { font: 600 .66rem/1 var(--xp-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--hub-accent); }
.hb-k--amber { color: var(--hub-amber); }
.hb-go { margin-top: auto; padding-top: .6rem; font: 600 .72rem/1 var(--xp-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--hub-ink); }
a.hb-card:hover .hb-go { color: var(--hub-accent); }
.hb-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 290px), 1fr)); gap: 1rem; }
.hb-grid--wide { grid-template-columns: repeat(auto-fill, minmax(min(100%, 380px), 1fr)); }
.hb-grid--tight { grid-template-columns: repeat(auto-fill, minmax(min(100%, 220px), 1fr)); gap: .7rem; }
.hb-meta { display: flex; flex-wrap: wrap; gap: .35rem .9rem; font: 500 .7rem/1.4 var(--xp-mono); letter-spacing: .06em; color: var(--hub-dim); text-transform: uppercase; }
.hb-pill { display: inline-flex; align-items: center; gap: .35rem; font: 500 .66rem/1 var(--xp-mono); letter-spacing: .08em; text-transform: uppercase; padding: .42rem .62rem; border-radius: 999px; border: 1px solid var(--hub-line-2); color: var(--hub-mute); white-space: nowrap; }
.hb-pill--accent { border-color: var(--hub-accent-line); color: var(--hub-accent); background: var(--hub-accent-soft); }
.hb-pill--amber { border-color: rgba(245,165,36,.4); color: var(--hub-amber); }
.hb-sec-head { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: 1rem 2rem; margin-bottom: 2.2rem; }
.hb-sec-head .xp-h2 { margin: 0; }
.hb-sec-head p { margin: 0; max-width: 34rem; color: var(--hub-mute); }

/* stat ribbon (theme-aware replacement for the old cream stat box) */
.hb-stats { display: grid; grid-template-columns: repeat(var(--hb-cols, 5), minmax(0,1fr)); border-block: 1px solid var(--hub-line); }
.hb-stats > div { padding: 1.8rem 1.2rem; border-left: 1px solid var(--hub-line); }
.hb-stats > div:first-child { border-left: 0; padding-left: 0; }
.hb-stats b { display: block; font: 500 clamp(1.9rem, 3.4vw, 2.8rem)/1 var(--xp-serif); color: var(--hub-strong); letter-spacing: -.03em; }
.hb-stats span { display: block; margin-top: .6rem; font: 500 .68rem/1.4 var(--xp-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--hub-mute); }

/* filter bar */
.hb-filter { position: sticky; top: 0; z-index: 15; display: flex; flex-wrap: wrap; gap: .7rem; align-items: center; padding: 1rem 0; margin-bottom: 1.6rem; background: color-mix(in srgb, var(--xp-bg) 88%, transparent); backdrop-filter: blur(12px); border-bottom: 1px solid var(--hub-line); }
.xp-sec--paper .hb-filter { background: color-mix(in srgb, var(--xp-paper) 90%, transparent); }
.hb-search { flex: 1 1 280px; min-width: 0; height: 46px; padding: 0 1rem 0 2.6rem; border-radius: 999px; border: 1px solid var(--hub-line-2); background: var(--hub-surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none' stroke='%238a9bb2' stroke-width='2' viewBox='0 0 24 24'%3E%3Ccircle cx='11' cy='11' r='7'/%3E%3Cpath d='m20 20-3.5-3.5'/%3E%3C/svg%3E") no-repeat 1rem 50%; color: var(--hub-ink); font: 400 .98rem var(--xp-sans); }
.hb-search::placeholder { color: var(--hub-dim); }
.hb-search:focus { outline: 2px solid var(--hub-accent); outline-offset: 1px; border-color: transparent; }
.hb-chips { display: flex; flex-wrap: wrap; gap: .4rem; }
.hb-chip { height: 36px; padding: 0 .9rem; border-radius: 999px; border: 1px solid var(--hub-line-2); background: transparent; color: var(--hub-mute); font: 500 .74rem/1 var(--xp-mono); letter-spacing: .06em; text-transform: uppercase; cursor: pointer; transition: all .2s; }
.hb-chip:hover { color: var(--hub-strong); border-color: var(--hub-accent-line); }
.hb-chip[aria-pressed="true"] { background: var(--hub-accent); border-color: var(--hub-accent); color: var(--hub-accent-ink); }
.hb-select { height: 40px; padding: 0 .9rem; border-radius: 999px; border: 1px solid var(--hub-line-2); background: var(--hub-surface); color: var(--hub-ink); font: 500 .8rem var(--xp-sans); }
.hb-select option { color: var(--xp-ink-dark); }
.hb-count { font: 500 .72rem/1 var(--xp-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--hub-dim); margin-left: auto; }
.hb-empty { display: none; padding: 3rem 0; text-align: center; color: var(--hub-mute); }
.hb-empty.on { display: block; }
[hidden].hb-card, .hb-card[hidden] { display: none !important; }

/* two-column doc layout with sticky TOC */
.hb-layout { display: grid; grid-template-columns: 250px minmax(0,1fr); gap: clamp(2rem, 5vw, 4.5rem); align-items: start; }
.hb-toc { position: sticky; top: 1.5rem; max-height: calc(100vh - 3rem); overflow-y: auto; padding-right: .5rem; scrollbar-width: thin; }
.hb-toc p { font: 600 .66rem/1 var(--xp-mono); letter-spacing: .16em; text-transform: uppercase; color: var(--hub-accent); margin: 0 0 1rem; }
.hb-toc a { display: block; padding: .42rem 0 .42rem .9rem; border-left: 1px solid var(--hub-line); color: var(--hub-mute); text-decoration: none; font-size: .86rem; line-height: 1.35; }
.hb-toc a:hover, .hb-toc a.on { color: var(--hub-strong); border-left-color: var(--hub-accent); }

/* long-form prose (markdown renders, briefs, guides, manual, prefaces) */
.hb-prose { max-width: 74ch; color: var(--hub-ink); font-size: 1.06rem; }
.hb-prose > *:first-child { margin-top: 0; }
.hb-prose h1 { font: 500 clamp(2rem, 4vw, 3rem)/1.08 var(--xp-serif); color: var(--hub-strong); letter-spacing: -.025em; margin: 0 0 1.2rem; }
.hb-prose h2 { font: 500 clamp(1.5rem, 2.6vw, 2.05rem)/1.15 var(--xp-serif); color: var(--hub-strong); letter-spacing: -.02em; margin: 3rem 0 1rem; padding-top: 1.6rem; border-top: 1px solid var(--hub-line); scroll-margin-top: 1.5rem; }
.hb-prose h3 { font: 600 1.12rem/1.3 var(--xp-sans); color: var(--hub-strong); margin: 2rem 0 .6rem; scroll-margin-top: 1.5rem; }
.hb-prose h4 { font: 600 .74rem/1.3 var(--xp-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--hub-accent); margin: 1.8rem 0 .5rem; }
.hb-prose p, .hb-prose li { line-height: 1.78; color: var(--hub-ink); }
.hb-prose p { margin: 0 0 1.1rem; }
.hb-prose strong { color: var(--hub-strong); }
.hb-prose a { color: var(--hub-accent); text-underline-offset: 3px; }
.hb-prose ul, .hb-prose ol { padding-left: 1.3rem; margin: 0 0 1.2rem; }
.hb-prose li { margin: .3rem 0; }
.hb-prose li::marker { color: var(--hub-accent); }
.hb-prose blockquote { margin: 1.6rem 0; padding: 1rem 1.3rem; border-left: 3px solid var(--hub-accent); background: var(--hub-accent-soft); border-radius: 0 12px 12px 0; }
.hb-prose blockquote p:last-child { margin: 0; }
.hb-prose code { font: 500 .88em var(--xp-mono); padding: .12em .38em; border-radius: 6px; background: var(--hub-surface-2); color: var(--hub-strong); }
.hb-prose pre { overflow-x: auto; padding: 1.1rem 1.2rem; border-radius: 12px; border: 1px solid var(--hub-line); background: var(--hub-surface); }
.hb-prose pre code { padding: 0; background: none; }
.hb-prose hr { border: 0; border-top: 1px solid var(--hub-line); margin: 2.4rem 0; }
.hb-prose img { max-width: 100%; height: auto; border-radius: 12px; border: 1px solid var(--hub-line); }
.hb-prose table { width: 100%; border-collapse: collapse; margin: 1.4rem 0 1.8rem; font-size: .92rem; display: block; overflow-x: auto; }
.hb-prose th, .hb-prose td { padding: .7rem .8rem; border-bottom: 1px solid var(--hub-line); text-align: left; vertical-align: top; color: var(--hub-ink); }
.hb-prose th { font: 600 .68rem/1.3 var(--xp-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--hub-mute); border-bottom-color: var(--hub-line-2); }
.hb-prose tr:hover td { background: var(--hub-surface); }

/* ---------- BOOK (bk-) ---------- */
.bk-hero { padding-bottom: clamp(3rem, 6vw, 5rem); }
.bk-stage { position: relative; display: grid; place-items: center; min-height: 420px; perspective: 1400px; }
.bk-stage::before { content: ""; position: absolute; width: 78%; aspect-ratio: 1; border-radius: 50%; background: radial-gradient(closest-side, var(--hub-accent-soft), transparent 72%); filter: blur(6px); }
.bk-cover3d { position: relative; width: min(280px, 70vw); transform: rotateY(-22deg) rotateX(4deg); transform-style: preserve-3d; transition: transform .8s cubic-bezier(.16,1,.3,1); }
.bk-stage:hover .bk-cover3d { transform: rotateY(-8deg) rotateX(2deg) translateY(-6px); }
.bk-cover3d img { display: block; width: 100%; height: auto; border-radius: 3px 8px 8px 3px; box-shadow: 40px 50px 90px -40px rgba(0,0,0,.95), inset 0 0 0 1px rgba(255,255,255,.06); }
.bk-cover3d::after { content: ""; position: absolute; top: 2%; bottom: 2%; right: -14px; width: 14px; transform: rotateY(90deg); transform-origin: left; background: repeating-linear-gradient(180deg, #e9e4d8 0 2px, #cfc8b8 2px 3px); border-radius: 0 3px 3px 0; }
.bk-cover3d::before { content: ""; position: absolute; inset: 0; border-radius: 3px 8px 8px 3px; background: linear-gradient(100deg, rgba(255,255,255,0) 40%, rgba(255,255,255,.16) 52%, rgba(255,255,255,0) 64%); pointer-events: none; z-index: 1; }
.bk-badge { position: absolute; right: 2%; top: 8%; width: 104px; height: 104px; border-radius: 50%; display: grid; place-items: center; text-align: center; background: var(--hub-accent); color: var(--hub-accent-ink); font: 700 .62rem/1.25 var(--xp-mono); letter-spacing: .1em; text-transform: uppercase; box-shadow: 0 20px 50px -18px rgba(46,230,211,.8); transform: rotate(10deg); z-index: 2; }
.bk-badge b { display: block; font: 600 2rem/1 var(--xp-serif); letter-spacing: -.03em; text-transform: none; }

.bk-shelf { display: flex; gap: clamp(.8rem, 2vw, 1.6rem); overflow-x: auto; padding: 2.5rem .5rem 2rem; scroll-snap-type: x mandatory; scrollbar-width: thin; align-items: end; border-bottom: 10px solid transparent; background: linear-gradient(transparent calc(100% - 26px), var(--hub-surface-2) calc(100% - 26px), var(--hub-surface-2) calc(100% - 16px), transparent calc(100% - 16px)); }
.bk-vol { flex: none; width: 150px; scroll-snap-align: start; text-decoration: none !important; color: var(--hub-ink); display: flex; flex-direction: column; gap: .7rem; }
.bk-vol figure { margin: 0; aspect-ratio: 3/4; border-radius: 3px 6px 6px 3px; overflow: hidden; background: var(--hub-surface-2); border: 1px solid var(--hub-line); box-shadow: 18px 22px 40px -22px rgba(0,0,0,.85); transition: transform .4s cubic-bezier(.16,1,.3,1), box-shadow .4s; display: grid; place-items: center; }
.bk-vol figure img { width: 100%; height: 100%; object-fit: cover; display: block; }
.bk-vol figure .bk-ph { font: 500 2.4rem/1 var(--xp-serif); color: var(--hub-accent); text-align: center; padding: 1rem; }
.bk-vol figure .bk-ph small { display: block; margin-top: .5rem; font: 600 .6rem/1.3 var(--xp-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--hub-mute); }
.bk-vol:hover figure { transform: translateY(-12px) rotate(-1.5deg); box-shadow: 24px 34px 50px -22px rgba(0,0,0,.9), 0 0 0 1px var(--hub-accent-line); }
.bk-vol b { font: 500 1.05rem/1.1 var(--xp-serif); color: var(--hub-strong); }
.bk-vol span { font: 500 .64rem/1.3 var(--xp-mono); letter-spacing: .1em; text-transform: uppercase; color: var(--hub-dim); }

.bk-quotes { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 1rem; }
.bk-quote { margin: 0; padding: 1.8rem 1.7rem 1.5rem; border-radius: var(--hub-radius); border: 1px solid var(--hub-line); background: var(--hub-surface); display: flex; flex-direction: column; gap: 1.2rem; }
.bk-quote blockquote { margin: 0; font: 400 italic 1.14rem/1.5 var(--xp-serif); color: var(--hub-strong); }
.bk-quote blockquote::before { content: "\201C"; display: block; font: 400 3.2rem/.6 var(--xp-serif); color: var(--hub-accent); margin-bottom: .7rem; }
.bk-quote figcaption { margin-top: auto; display: grid; gap: .25rem; }
.bk-quote figcaption b { font-weight: 600; color: var(--hub-strong); font-size: .95rem; }
.bk-quote figcaption span { font-size: .82rem; color: var(--hub-mute); line-height: 1.45; }
.bk-quote figcaption a { font: 600 .68rem/1 var(--xp-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--hub-accent); text-decoration: none; margin-top: .4rem; }
.bk-quote--lead { grid-column: span 2; }
.bk-quote--lead blockquote { font-size: clamp(1.35rem, 2.2vw, 1.75rem); line-height: 1.38; }

.bk-tl { list-style: none; margin: 0; padding: 0; position: relative; }
.bk-tl::before { content: ""; position: absolute; left: 7.25rem; top: .6rem; bottom: .6rem; width: 1px; background: linear-gradient(var(--hub-accent), var(--hub-line) 85%); }
.bk-tl li { position: relative; }
.bk-tl a { display: grid; grid-template-columns: 6rem 2.5rem minmax(0,1fr) auto; align-items: center; gap: 0 1rem; padding: 1.15rem .8rem 1.15rem 0; border-radius: 14px; color: var(--hub-ink); text-decoration: none !important; transition: background .25s; }
.bk-tl a:hover { background: var(--hub-surface-hover); }
.bk-tl .bk-yr { text-align: right; font: 500 1.5rem/1 var(--xp-serif); color: var(--hub-strong); letter-spacing: -.02em; }
.bk-tl .bk-dot { justify-self: center; width: 13px; height: 13px; border-radius: 50%; border: 2px solid var(--hub-accent); background: var(--xp-bg); position: relative; z-index: 1; }
.xp-sec--paper .bk-tl .bk-dot { background: var(--xp-paper); }
.bk-tl a:hover .bk-dot { background: var(--hub-accent); box-shadow: 0 0 0 6px var(--hub-accent-soft); }
.bk-tl .bk-who { display: grid; gap: .2rem; min-width: 0; }
.bk-tl .bk-who b { font: 500 1.18rem/1.25 var(--xp-serif); color: var(--hub-strong); }
.bk-tl .bk-who em { font-style: normal; font-size: .86rem; color: var(--hub-mute); line-height: 1.45; }
.bk-tl .bk-who small { font: 600 .62rem/1 var(--xp-mono); letter-spacing: .14em; text-transform: uppercase; color: var(--hub-accent); }
.bk-tl .bk-read { font: 600 .68rem/1 var(--xp-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--hub-dim); white-space: nowrap; }
.bk-tl a:hover .bk-read { color: var(--hub-accent); }

.bk-buy { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 1rem; }
.bk-buy .hb-card { padding: 1.7rem; }
.bk-buy .hb-card .xp-btn { margin-top: 1rem; align-self: flex-start; height: 46px; }

.bk-chapters { columns: 2; column-gap: 3rem; list-style: none; padding: 0; margin: 0; counter-reset: bkc; }
.bk-chapters li { break-inside: avoid; counter-increment: bkc; display: grid; grid-template-columns: 2.6rem minmax(0,1fr); gap: .8rem; padding: .95rem 0; border-bottom: 1px solid var(--hub-line); color: var(--hub-ink); }
.bk-chapters li::before { content: counter(bkc, decimal-leading-zero); font: 500 .8rem/1.6 var(--xp-mono); color: var(--hub-accent); }
.bk-chapters b { display: block; color: var(--hub-strong); font-weight: 600; }
.bk-chapters span { font-size: .88rem; color: var(--hub-mute); }

/* ---------- READER (rd-) — preface / foreword pages ---------- */
.rd-hero { padding-bottom: clamp(3rem, 6vw, 4.5rem); }
.rd-grid { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: clamp(2.5rem, 6vw, 5.5rem); align-items: start; }
.rd-essay { font: 400 clamp(1.08rem, 1.3vw, 1.22rem)/1.85 var(--xp-serif); color: var(--hub-ink); max-width: 66ch; }
.rd-essay p { margin: 0 0 1.35rem; }
.rd-essay p:first-child::first-letter { float: left; font: 500 4.6rem/.8 var(--xp-serif); margin: .38rem .7rem 0 0; color: var(--hub-accent); }
.rd-essay i, .rd-essay em { color: var(--hub-strong); }
.rd-essay a { color: var(--hub-accent); }
.rd-sign { margin-top: 2.4rem; padding-top: 1.4rem; border-top: 1px solid var(--hub-line); display: grid; gap: .3rem; font-family: var(--xp-sans); }
.rd-sign b { font: 500 1.35rem/1.2 var(--xp-serif); color: var(--hub-strong); font-style: italic; }
.rd-sign span { font-size: .9rem; color: var(--hub-mute); }
.rd-aside { position: sticky; top: 1.5rem; display: grid; gap: 1rem; }
.rd-aside .hb-card { padding: 1.3rem; }
.rd-cover { margin: 0; border-radius: 4px 8px 8px 4px; overflow: hidden; border: 1px solid var(--hub-line); box-shadow: var(--hub-shadow); background: var(--hub-surface-2); }
.rd-cover img { display: block; width: 100%; height: auto; }
.rd-facts { display: grid; gap: 0; }
.rd-facts div { display: flex; justify-content: space-between; gap: 1rem; padding: .62rem 0; border-bottom: 1px dashed var(--hub-line); font-size: .86rem; }
.rd-facts div:last-child { border-bottom: 0; }
.rd-facts dt { color: var(--hub-mute); font: 500 .66rem/1.6 var(--xp-mono); letter-spacing: .1em; text-transform: uppercase; }
.rd-facts dd { margin: 0; color: var(--hub-strong); text-align: right; }
.rd-pager { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-top: 3.5rem; }
.rd-pager a { display: grid; gap: .35rem; padding: 1.2rem 1.3rem; border-radius: 14px; border: 1px solid var(--hub-line); background: var(--hub-surface); color: var(--hub-ink); text-decoration: none !important; transition: border-color .25s; }
.rd-pager a:hover { border-color: var(--hub-accent-line); }
.rd-pager a.next { text-align: right; }
.rd-pager span { font: 600 .64rem/1 var(--xp-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--hub-accent); }
.rd-pager b { font: 500 1.05rem/1.3 var(--xp-serif); color: var(--hub-strong); }
.rd-pager small { color: var(--hub-mute); font-size: .82rem; }
.rd-zh { font-family: "Noto Serif SC", "Songti SC", "SimSun", var(--xp-serif); }

/* ---------- VIDEO (vd-) ---------- */
.vd-feature { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr); gap: 0; border-radius: 22px; overflow: hidden; border: 1px solid var(--hub-line); background: var(--hub-surface); box-shadow: var(--hub-shadow); }
.vd-feature video { width: 100%; height: 100%; min-height: 320px; object-fit: cover; background: #000; display: block; }
.vd-feature-body { padding: clamp(1.6rem, 3vw, 2.4rem); display: flex; flex-direction: column; gap: 1rem; }
.vd-feature-body h3 { font: 500 clamp(1.5rem, 2.4vw, 2rem)/1.15 var(--xp-serif); color: var(--hub-strong); margin: 0; letter-spacing: -.02em; }
.vd-feature-body p { margin: 0; color: var(--hub-mute); line-height: 1.7; }
.vd-chapters { list-style: none; margin: .4rem 0 0; padding: 0; display: grid; gap: 0; border-top: 1px solid var(--hub-line); }
.vd-chapters button { width: 100%; display: grid; grid-template-columns: 4rem minmax(0,1fr); gap: .8rem; align-items: baseline; padding: .7rem 0; border: 0; border-bottom: 1px solid var(--hub-line); background: none; color: var(--hub-ink); text-align: left; cursor: pointer; font: 400 .92rem/1.4 var(--xp-sans); }
.vd-chapters button:hover { color: var(--hub-strong); }
.vd-chapters button span { font: 500 .74rem/1 var(--xp-mono); color: var(--hub-accent); }
.vd-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr)); gap: 1.1rem; }
.vd-card { margin: 0; border-radius: var(--hub-radius); overflow: hidden; border: 1px solid var(--hub-line); background: var(--hub-surface); display: flex; flex-direction: column; transition: border-color .25s, transform .25s; }
.vd-card:hover { border-color: var(--hub-accent-line); transform: translateY(-3px); }
.vd-card video { width: 100%; aspect-ratio: 16/9; background: #000; display: block; object-fit: cover; }
.vd-card figcaption { padding: 1.1rem 1.2rem 1.3rem; display: grid; gap: .45rem; }
.vd-card h3 { margin: 0; font: 500 1.15rem/1.25 var(--xp-serif); color: var(--hub-strong); }
.vd-card p { margin: 0; font-size: .88rem; line-height: 1.55; color: var(--hub-mute); }
.vd-dur { font: 600 .64rem/1 var(--xp-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--hub-accent); }
.vd-reel { display: grid; grid-auto-flow: column; grid-auto-columns: minmax(240px, 1fr); gap: .8rem; overflow-x: auto; padding-bottom: .6rem; scrollbar-width: thin; }
.vd-reel figure { margin: 0; position: relative; border-radius: 14px; overflow: hidden; border: 1px solid var(--hub-line); aspect-ratio: 16/10; background: #000; }
.vd-reel video { width: 100%; height: 100%; object-fit: cover; display: block; opacity: .9; }
.vd-reel figcaption { position: absolute; left: .8rem; bottom: .7rem; right: .8rem; font: 600 .64rem/1.3 var(--xp-mono); letter-spacing: .12em; text-transform: uppercase; color: #fff; text-shadow: 0 2px 10px rgba(0,0,0,.9); }
.vd-audio { display: grid; grid-template-columns: 120px minmax(0,1fr); gap: 1.5rem; align-items: center; padding: 1.5rem; border-radius: var(--hub-radius); border: 1px solid var(--hub-line); background: var(--hub-surface); max-width: 760px; }
.vd-audio-art { aspect-ratio: 1; border-radius: 14px; display: grid; place-items: center; background: radial-gradient(circle at 30% 30%, var(--hub-accent-soft), transparent 70%), var(--hub-surface-2); border: 1px solid var(--hub-accent-line); color: var(--hub-accent); font: 600 2.2rem/1 var(--xp-serif); }
.vd-audio audio { width: 100%; margin-top: .6rem; }

/* ---------- PROOF WALLS (wall-) ---------- */
.wall-band { position: relative; overflow: hidden; border-block: 1px solid var(--hub-line); padding: 1.4rem 0; -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
.wall-track { display: flex; gap: .6rem; width: max-content; animation: xpScroll 70s linear infinite; }
.wall-band:hover .wall-track { animation-play-state: paused; }
.wall-track + .wall-track { margin-top: .6rem; animation-direction: reverse; animation-duration: 85s; }
@media (prefers-reduced-motion: reduce) { .wall-track { animation: none; flex-wrap: wrap; width: auto; } }
.wall-chip { flex: none; display: inline-flex; align-items: baseline; gap: .45rem; padding: .6rem 1rem; border-radius: 999px; border: 1px solid var(--hub-line); background: var(--hub-surface); font-size: .9rem; color: var(--hub-strong); white-space: nowrap; }
.wall-chip span { font: 500 .66rem/1 var(--xp-mono); letter-spacing: .06em; text-transform: uppercase; color: var(--hub-dim); }
.wall-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 230px), 1fr)); gap: .6rem; }
.wall-tile { display: grid; grid-template-columns: 56px minmax(0,1fr); gap: .9rem; align-items: center; padding: .8rem .9rem; border-radius: 14px; border: 1px solid var(--hub-line); background: var(--hub-surface); color: var(--hub-ink); text-decoration: none !important; transition: border-color .2s, background .2s; min-width: 0; }
.wall-tile:hover { border-color: var(--hub-accent-line); background: var(--hub-surface-hover); }
.wall-tile .wall-logo { width: 56px; height: 40px; border-radius: 8px; background: #fff; display: grid; place-items: center; overflow: hidden; }
.wall-tile .wall-logo img { max-width: 50px; max-height: 34px; object-fit: contain; }
.wall-tile .wall-logo b { font: 700 .9rem/1 var(--xp-sans); color: var(--xp-ink-dark); }
.wall-tile strong { display: block; font-size: .9rem; font-weight: 600; color: var(--hub-strong); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.wall-tile small { display: block; font-size: .74rem; color: var(--hub-mute); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.wall-letters { display: flex; flex-wrap: wrap; gap: .25rem; }
.wall-letters button { width: 34px; height: 34px; border-radius: 8px; border: 1px solid var(--hub-line); background: transparent; color: var(--hub-mute); font: 600 .76rem var(--xp-mono); cursor: pointer; }
.wall-letters button[aria-pressed="true"], .wall-letters button:hover { background: var(--hub-accent); color: var(--hub-accent-ink); border-color: var(--hub-accent); }
/* legacy class names kept for older markup */
.proof-band { display: flex; flex-wrap: wrap; gap: .45rem; margin-top: 1.2rem; }
.proof-chip { font-size: .86rem; padding: .5rem .85rem; border-radius: 999px; border: 1px solid var(--hub-line); background: var(--hub-surface); color: var(--hub-strong); }
.proof-chip span { color: var(--hub-dim); }
.proof-search { width: 100%; max-width: 420px; margin: 1rem 0 .4rem; height: 46px; padding: 0 1rem; border-radius: 999px; border: 1px solid var(--hub-line-2); background: var(--hub-surface); color: var(--hub-ink); font: inherit; }

/* ---------- EXPERTS ---------- */
.expert-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr)); gap: .9rem; margin-top: 1.2rem; }
.expert-card { padding: 1.2rem 1.3rem; border-radius: 14px; border: 1px solid var(--hub-line); background: var(--hub-surface); }
.expert-card h3 { margin: .4rem 0 .25rem; font: 500 1.1rem/1.3 var(--xp-serif); color: var(--hub-strong); }
.expert-card p { margin: 0; font-size: .87rem; color: var(--hub-mute); line-height: 1.55; }
.expert-domain { font: 600 .64rem/1 var(--xp-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--hub-accent); }

/* ---------- MANUAL ---------- */
.manual-body { max-width: 860px; }
.manual-body img { width: 100%; border-radius: 14px; border: 1px solid var(--hub-line); margin: 1.2rem 0 1.6rem; box-shadow: var(--hub-shadow); }
.manual-toc { columns: 2; gap: 1.4rem; margin: 0 0 2.4rem; }
.manual-toc a { display: block; padding: .4rem 0; color: var(--hub-ink); text-decoration: none; border-bottom: 1px solid var(--hub-line); font-size: .92rem; break-inside: avoid; }
.manual-toc a:hover { color: var(--hub-accent); }

/* ---------- events frame (legacy) ---------- */
.events-frame { width: 100%; min-height: 100vh; border: 0; display: block; background: var(--xp-bg); }

/* ---------- calendar add buttons (seminar partial support) ---------- */
.hb-cal { display: flex; flex-wrap: wrap; gap: .45rem; }

@media (max-width: 1000px) {
  .hb-layout, .rd-grid, .vd-feature { grid-template-columns: 1fr; }
  .hb-toc, .rd-aside { position: static; max-height: none; }
  .bk-quotes, .bk-buy { grid-template-columns: 1fr 1fr; }
  .bk-quote--lead { grid-column: span 2; }
  .hb-stats { grid-template-columns: repeat(3, minmax(0,1fr)); }
  .hb-stats > div:nth-child(4) { border-left: 0; padding-left: 0; }
}
@media (max-width: 680px) {
  .bk-quotes, .bk-buy, .rd-pager { grid-template-columns: 1fr; }
  .bk-quote--lead { grid-column: auto; }
  .bk-chapters, .manual-toc { columns: 1; }
  .bk-tl::before { left: 3.6rem; }
  .bk-tl a { grid-template-columns: 2.8rem 1.6rem minmax(0,1fr); }
  .bk-tl .bk-yr { font-size: 1.05rem; }
  .bk-tl .bk-read { display: none; }
  .hb-stats { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .hb-stats > div { border-left: 0; padding-left: 0; }
  .vd-audio { grid-template-columns: 1fr; }
  .vd-audio-art { width: 90px; }
}