.hero {
  margin: 8px var(--gutter) 0;
  height: clamp(640px, calc(100vh - var(--nav-h) - 68px), 780px);
  border-radius: var(--r-hero);
  position: relative;
  overflow: hidden;
  isolation: isolate;
  background: radial-gradient(58% 72% at 100% 0%, var(--accent-a16) 0%, var(--accent-a08) 38%, var(--accent-a00) 72%), linear-gradient(165deg, var(--bg-panel-2) 0%, var(--bg) 100%);
  color: var(--text);
  box-shadow: inset 0 0 0 1px var(--white-a55);
}
.hero-grid { height: 100%; padding: 0 var(--inset); display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.04fr); align-items: center; gap: 24px; }
.hero-copy { max-width: 580px; }
.eyebrow { margin: 0 0 22px; display: inline-flex; align-items: center; gap: 10px; font-size: 13px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--wine); }
.eyebrow::before { content: ""; width: 18px; height: 1px; flex-shrink: 0; background: var(--wine); }
.hero-title { margin: 0; font-family: var(--font-display); font-weight: var(--weight-regular); font-size: clamp(30px, 3.4vw, 48px); line-height: 1.12; letter-spacing: -0.02em; color: var(--text); }
.hero-title .ln { display: block; }
.hero-title .w { display: inline-block; white-space: nowrap; animation: word-rise 0.62s var(--ease-out) both; }
.hero-title .w1 { animation-delay: 0s; }
.hero-title .w2 { animation-delay: 0.14s; }
.hero-title .w3 { animation-delay: 0.28s; }
.hero-title .mark { position: relative; color: var(--accent-dark); }
.hero-title .mark::after { content: ""; position: absolute; left: -0.06em; right: -0.06em; bottom: 0.06em; height: 0.3em; border-radius: var(--r-mark); background: var(--accent-a16); z-index: -1; transform-origin: left center; animation: mark-sweep 0.4s var(--ease-out) 0.72s both; }
@keyframes word-rise { from { opacity: 0; transform: translateY(0.45em); } to { opacity: 1; transform: translateY(0); } }
@keyframes mark-sweep { from { transform: scaleX(0); } to { transform: scaleX(1); } }
.hero-lede { margin: 22px 0 0; max-width: 31em; font-size: 17px; line-height: 1.7; color: var(--text-muted); }
.hero-lede strong { color: var(--text); font-weight: var(--weight-strong); }
.platforms { margin-top: 28px; display: flex; align-items: center; flex-wrap: wrap; gap: 8px; }
.row-label { margin-right: 6px; font-family: var(--font-mono); font-size: 11.5px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-muted); }
.plat-chip { display: inline-flex; align-items: center; gap: 8px; height: 36px; padding: 0 13px 0 11px; border: 1px solid var(--border); border-radius: var(--r-ctl); background: var(--bg-panel); color: var(--text); font-size: 13.5px; box-shadow: 0 1px 2px var(--ink-a05); transition: border-color var(--duration-fast) ease, color var(--duration-fast) ease; }
.plat-chip svg { width: 15px; height: 15px; color: var(--text-muted); }
.plat-chip:hover { border-color: var(--accent-a36); color: var(--accent-dark); }
.plat-chip:hover svg { color: var(--accent); }
.protocols { margin: 22px 0 0; padding: 18px 0 0; border-top: 1px solid var(--border); display: flex; align-items: center; flex-wrap: wrap; gap: 6px; list-style: none; }
.protocols .row-label { margin-right: 8px; }
.proto { display: inline-flex; align-items: center; min-height: 28px; padding: 3px 11px; border-radius: var(--r-pill); background: var(--white-a80); color: var(--text); font-family: var(--font-mono); font-size: 12.5px; box-shadow: inset 0 0 0 1px var(--border); }
.armillary { position: relative; justify-self: center; width: min(560px, 100%); aspect-ratio: 1; }
.armillary-svg { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
.armillary-svg .glow-in { stop-color: var(--accent); stop-opacity: 0.22; }
.armillary-svg .glow-out { stop-color: var(--accent); stop-opacity: 0; }
.armillary-svg .cf-a { stop-color: var(--accent); }
.armillary-svg .cf-b { stop-color: var(--accent-dark); }
.ring { fill: none; stroke: var(--accent); stroke-width: 1.1; }
.ring-a { opacity: 0.85; }
.ring-b { opacity: 0.7; stroke-dasharray: 3 6; }
.ring-c { opacity: 0.6; }
.rnode, .anode { fill: var(--bg-panel); stroke: var(--accent); stroke-width: 1.3; }
.rnode-in { fill: var(--accent); }
.axis { stroke: var(--accent); stroke-width: 1.4; opacity: 0.9; }
.halo-outer { fill: var(--accent-a05); }
.halo-inner { fill: var(--accent-a12); }
.core { fill: url(#coreFill); }
.core-gloss { fill: none; stroke: var(--on-accent); stroke-width: 1; opacity: 0.28; }
.core-ring { fill: none; stroke: var(--on-accent); stroke-width: 2.2; stroke-linecap: round; stroke-linejoin: round; }
.core-dot { fill: var(--on-accent); }
.spin { transform-box: view-box; transform-origin: 50% 50%; animation: ring-spin 96s linear infinite; }
.spin-b { animation-duration: 132s; animation-direction: reverse; }
.spin-c { animation-duration: 168s; }
@keyframes ring-spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }
.anode { animation: node-breathe 3s ease-in-out infinite; }
@keyframes node-breathe { 0%, 100% { opacity: 0.55; } 50% { opacity: 1; } }
.hero-static .spin, .hero-static .anode { animation: none; }
.fcard { position: absolute; display: grid; gap: 5px; padding: 11px 15px 12px 13px; background: var(--bg-panel); color: var(--text); border: 1px solid var(--border); border-radius: var(--r-card); box-shadow: var(--shadow-card); white-space: nowrap; }
.fcard-head { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--text-muted); }
.fcard-head .key { margin-left: auto; padding-left: 14px; font-family: var(--font-mono); font-size: 10.5px; letter-spacing: 0.04em; color: var(--text-muted); }
.dot { width: 7px; height: 7px; border-radius: var(--r-round); flex-shrink: 0; }
.dot-in { background: var(--accent); box-shadow: 0 0 0 3px var(--accent-a12); }
.dot-route { background: var(--success); }
.dot-out { background: var(--warn); }
.dot-core { background: var(--text); }
.fcard-val { font-family: var(--font-mono); font-size: 13.5px; line-height: 1.3; color: var(--text); letter-spacing: -0.01em; }
.fcard-val .k { color: var(--accent-dark); }
.fcard-val .op { color: var(--text-muted); }
.fc-in { left: 0; top: 22%; }
.fc-route { right: -3%; top: 11%; }
.fc-out { left: 5%; top: 63%; box-shadow: 9px 9px 0 -1px var(--bg-panel-2), 9px 9px 0 0 var(--border), var(--shadow-card); }
.fc-core { right: 0; top: 74%; }
.dl-section { padding-top: 36px; padding-bottom: 96px; padding-inline: calc(var(--gutter) + var(--inset)); }
.sec-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; }
.sec-head .eyebrow { margin-bottom: 14px; }
.sec-title { margin: 0; font-weight: var(--weight-regular); font-size: clamp(24px, 2.2vw, 32px); line-height: 1.2; letter-spacing: -0.015em; }
.sec-link { font-size: 15px; color: var(--accent); }
.sec-link:hover { color: var(--accent-dark); }
.strip { margin-top: 32px; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.strip-card { display: grid; gap: 10px; padding: 22px 22px 20px; background: var(--bg-panel); color: var(--text); border: 1px solid var(--border); border-radius: var(--r-card); box-shadow: var(--shadow-card); transition: transform 0.2s ease, border-color 0.2s ease; }
.strip-card:hover { transform: translateY(-2px); border-color: var(--accent-a36); }
.strip-icon { width: 40px; height: 40px; border-radius: var(--r-ctl); background: var(--bg); color: var(--text); display: grid; place-items: center; box-shadow: inset 0 0 0 1px var(--border); }
.strip-icon svg { width: 18px; height: 18px; }
.strip-name { font-size: 17px; }
.strip-client { font-family: var(--font-mono); font-size: 13px; color: var(--accent-dark); }
.strip-note { font-size: 14px; color: var(--text-muted); line-height: 1.55; }
.strip-go { font-size: 14px; color: var(--accent); }
.tabs { min-width: 0; }
.tab-list, [role="tablist"].tab-list { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-bottom: 24px; }
.tab-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 44px;
  padding: 10px 20px;
  border: 1px solid var(--border);
  border-radius: var(--r-ctl);
  background: var(--bg-panel);
  color: var(--text-muted);
}
.tab-button[aria-selected="true"] { border-color: var(--accent); background: var(--accent); color: var(--on-accent); }
.tab-button:hover { border-color: var(--accent); }
[role="tabpanel"] { min-width: 0; }
.feature-layout { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 64px; margin-top: 36px; align-items: start; }
.feature-list { display: block; }
.feature-item { border-bottom: 1px solid var(--border); padding-block: 8px; }
.feature-tab { width: 100%; min-height: 72px; display: flex; align-items: center; gap: 16px; padding: 18px 24px; border: 0; background: var(--clear); color: var(--text); text-align: left; font-size: 20px; font-weight: var(--weight-regular); border-radius: var(--r-card); }
.feature-tab .chev { margin-left: auto; }
.feature-glyph { width: 26px; height: 26px; flex-shrink: 0; }
.glyph-blue { fill: var(--accent); }
.glyph-wine { fill: var(--wine); }
.feature-item.is-selected { background: var(--wine); color: var(--on-accent); border-radius: var(--r-card); border-color: var(--clear); }
.feature-tab[aria-selected="true"] { color: var(--on-accent); }
.feature-tab[aria-selected="true"] .glyph-blue, .feature-tab[aria-selected="true"] .glyph-wine { fill: var(--on-accent); }
.feature-tab[aria-selected="true"] .chev { transform: rotate(180deg); }
.feature-description { padding: 0 24px 24px 66px; font-size: 15px; line-height: 1.85; }
.feature-description p { margin-bottom: 22px; }
.round-link { display: inline-grid; place-items: center; width: 44px; height: 44px; border-radius: var(--r-round); background: var(--bg-panel); color: var(--wine); font-size: 22px; }
.grid-stage {
  position: relative;
  min-height: 450px;
  display: grid;
  place-items: center;
  padding: 48px 30px;
  background-color: var(--bg);
  color: var(--text);
  background-image: linear-gradient(var(--border) 1px, var(--clear) 1px), linear-gradient(90deg, var(--border) 1px, var(--clear) 1px);
  background-size: 44px 44px;
}
.settings-card { position: relative; width: 100%; max-width: 380px; border: 1px solid var(--border); border-radius: var(--r-card); background: var(--bg-panel); color: var(--text); box-shadow: 12px 12px 0 -1px var(--bg-panel-2), 12px 12px 0 0 var(--border), var(--shadow-float); padding: 24px; }
.settings-card h3 { margin: 0 0 22px; font-size: 19px; }
.setting-row { display: flex; align-items: baseline; justify-content: space-between; flex-wrap: wrap; gap: 8px; padding-block: 14px; border-top: 1px solid var(--border); font-size: 14px; }
.setting-row code { color: var(--accent-dark); }
.setting-row dd, .setting-row dt { margin: 0; }
.settings-card dl { margin: 0; }
.toc { position: sticky; top: 12px; z-index: 10; display: flex; gap: 8px; overflow-x: auto; max-width: 100%; padding: 10px; margin-bottom: 32px; border: 1px solid var(--border); border-radius: var(--r-card); background: var(--bg-panel); color: var(--text); box-shadow: var(--shadow-card); overscroll-behavior-x: contain; }
.toc a { flex-shrink: 0; display: inline-flex; align-items: center; min-height: 44px; padding: 8px 14px; border-radius: var(--r-ctl); color: var(--text-muted); }
.toc a:hover, .toc a[aria-current="location"] { background: var(--bg); color: var(--accent-dark); }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item summary { list-style: none; min-height: 64px; padding: 18px 40px 18px 0; position: relative; font-size: 18px; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; position: absolute; right: 8px; top: 18px; color: var(--accent); }
.faq-item[open] summary::after { content: "−"; }
.faq-answer { padding-bottom: 24px; color: var(--text-muted); line-height: 1.85; }
.faq-answer p:last-child { margin-bottom: 0; }
.term-card { padding: 26px; border-top: 2px solid var(--accent); }
.term-card h3 { margin-bottom: 8px; }
.term-alias { display: block; margin-bottom: 16px; font: 13px var(--font-mono); color: var(--text-muted); }
.term-card p { color: var(--text-muted); }
.client-card { padding: 28px; }
.client-head { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; margin-bottom: 20px; }
.client-head h3 { margin: 0; }
.client-logo { width: 56px; height: 56px; flex-shrink: 0; }
.client-meta { color: var(--text-muted); font-size: 14px; }
.client-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }
.badge-row { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; }
.badge, .tag { display: inline-block; max-width: 100%; padding: 4px 10px; border: 1px solid var(--border); border-radius: var(--r-pill); background: var(--bg-panel); color: var(--text-muted); font-size: 12px; line-height: 1.5; overflow-wrap: anywhere; }
.badge-featured { background: var(--accent); border-color: var(--accent); color: var(--on-accent); }
.badge-recommended { background: var(--accent-a08); border-color: var(--accent-a24); color: var(--accent-dark); }
.badge-retired { background: var(--bg-panel-2); border-color: var(--border); color: var(--text-muted); }
.article-card { display: flex; flex-direction: column; gap: 16px; height: 100%; }
.article-card h3 { margin: 0; font-size: 22px; line-height: 1.5; }
.article-card h3 a:hover { color: var(--accent); }
.article-card p { color: var(--text-muted); margin: 0; }
.article-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; color: var(--text-muted); font-size: 13px; }
.article-card .sec-link { margin-top: auto; }
.callout { margin: 24px 0; padding: 22px 24px; border: 1px solid var(--accent-a24); border-left: 3px solid var(--accent); border-radius: var(--r-ctl); background: var(--accent-a05); color: var(--text); line-height: 1.8; }
.callout p:last-child { margin-bottom: 0; }
.callout-title { display: block; margin-bottom: 8px; font-weight: var(--weight-medium); }
.table-scroll { overflow-x: auto; max-width: 100%; min-width: 0; border: 1px solid var(--border); border-radius: var(--r-card); -webkit-overflow-scrolling: touch; }
.data-table { width: 100%; border-collapse: collapse; background: var(--bg-panel); color: var(--text); font-size: 14px; }
.data-table th, .data-table td, .prose table th, .prose table td {
  min-width: 7em;
  padding: 16px 18px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
  overflow-wrap: normal;
  word-break: normal;
}
.data-table th, .prose table th { background: var(--bg-panel-2); color: var(--text); font-weight: var(--weight-medium); }
.data-table tr:last-child td { border-bottom: 0; }
.prose table {
  display: block;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  max-width: 100%;
  min-width: 0;
  border-collapse: collapse;
  background: var(--bg-panel);
  color: var(--text);
}
.quicksteps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px; list-style: none; margin: 32px 0 0; padding: 0; }
.quicksteps li { position: relative; border-top: 1px dashed var(--border); padding-top: 28px; }
.step-number { display: inline-grid; place-items: center; width: 36px; height: 36px; border: 1px solid var(--accent); border-radius: var(--r-round); background: var(--bg); color: var(--accent); font: 14px var(--font-mono); }
.quicksteps h3 { margin-block: 20px 12px; }
.quicksteps p { color: var(--text-muted); }
.article-download { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 24px; margin-top: 48px; padding: 28px; background: var(--bg-panel-2); color: var(--text); border: 1px solid var(--border); border-radius: var(--r-card); }
.article-download h2 { margin: 0 0 8px; font-size: 24px; }
.article-download p { margin: 0; color: var(--text-muted); }
.dl-fab { position: fixed; right: 22px; bottom: 22px; z-index: 40; display: inline-flex; align-items: center; gap: 10px; min-height: 46px; padding: 5px 18px 5px 6px; border-radius: var(--r-pill); background: var(--bg-panel); color: var(--text); border: 1px solid var(--border); box-shadow: var(--shadow-float); font-size: 14px; font-weight: var(--weight-medium); transition: border-color var(--duration-fast) ease, transform var(--duration-fast) ease; }
.dl-fab:hover { border-color: var(--accent-a36); transform: translateY(-1px); }
.dl-fab-ic { width: 34px; height: 34px; flex-shrink: 0; border-radius: var(--r-round); background: var(--accent); color: var(--on-accent); display: grid; place-items: center; }
.dl-fab-ic svg { width: 16px; height: 16px; }
.dl-fab-ic path { fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.preview-group { margin-top: 32px; }
.preview-group > h3 { margin-top: 0; }
.swatches { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; margin-top: 32px; }
.swatch { padding: 12px; background: var(--bg-panel); color: var(--text); border: 1px solid var(--border); border-radius: var(--r-card); }
.swatch-color { height: 72px; margin-bottom: 12px; border: 1px solid var(--border); border-radius: var(--r-ctl); }
.swatch code { display: block; }
.sw-bg { background: var(--bg); color: var(--text); }
.sw-panel { background: var(--bg-panel); color: var(--text); }
.sw-panel2 { background: var(--bg-panel-2); color: var(--text); }
.sw-border { background: var(--border); color: var(--text); }
.sw-accent { background: var(--accent); color: var(--on-accent); }
.sw-dark { background: var(--accent-dark); color: var(--on-accent); }
.sw-wine { background: var(--wine); color: var(--on-accent); }
.sw-text { background: var(--text); color: var(--on-accent); }
.sw-muted { background: var(--text-muted); color: var(--on-accent); }
.sw-success { background: var(--success); color: var(--text); }
.sw-warn { background: var(--warn); color: var(--text); }
.sw-error { background: var(--error); color: var(--on-accent); }
.sw-alpha { background: linear-gradient(90deg, var(--accent-a05), var(--accent-a36)); color: var(--text); }
.sw-white { background: linear-gradient(90deg, var(--white-a55), var(--white-a80)); color: var(--text); }
.sw-ink { background: linear-gradient(90deg, var(--ink-a05), var(--ink-a36)); color: var(--text); }
.icon-defs { position: absolute; width: 0; height: 0; overflow: hidden; }
@media (max-width: 1100px) {
  .hero { height: auto; }
  .hero-grid { grid-template-columns: 1fr; padding-top: 56px; padding-bottom: 48px; gap: 40px; }
  .armillary { width: min(500px, 100%); }
  .strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feature-layout { gap: 32px; }
}
@media (max-width: 768px) {
  .hero-title { font-size: clamp(24px, 4vw, 30px); }
  .feature-layout { grid-template-columns: 1fr; }
  .feature-tab { font-size: 18px; }
  .swatches { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
  .hero-grid { padding-top: 40px; gap: 24px; }
  .hero-lede { font-size: 16px; }
  .hero-copy .eyebrow { font-size: 11px; letter-spacing: 0.08em; margin-bottom: 18px; }
  .hero .cta-row { margin-top: 24px; gap: 8px; }
  .hero .btn { font-size: 14px; padding-inline: 16px; }
  .platforms { gap: 6px; }
  .platforms .row-label { display: none; }
  .plat-chip { padding-inline: 9px; font-size: 12px; gap: 5px; }
  .protocols { gap: 5px; }
  .proto { font-size: 11px; padding-inline: 8px; }
  .protocols .row-label { width: 100%; }
  .fcard { transform: scale(0.72); }
  .fc-in, .fc-out { transform-origin: left center; }
  .fc-route, .fc-core { transform-origin: right center; }
  .fc-route { right: 0; }
  .fc-core { top: 78%; }
  .sec-head { flex-direction: column; align-items: start; }
  .strip { grid-template-columns: 1fr; }
  .dl-section { padding-inline: var(--gutter); padding-bottom: 56px; }
  .quicksteps { grid-template-columns: 1fr; gap: 20px; }
  .feature-description { padding-left: 24px; }
  .grid-stage { padding-inline: 20px; min-height: 360px; }
  .settings-card { padding: 20px; }
  .dl-fab { right: 16px; bottom: max(16px, env(safe-area-inset-bottom)); }
  .article-download { padding: 20px; }
}
@media (prefers-reduced-motion: reduce) {
  .hero-title .w, .hero-title .mark::after, .spin, .anode { animation: none; }
}