/* Hepha website. Plain CSS, no build step. Tokens follow docs/assets/brand/src/brand.css. */

:root {
  --bg: #100d0c;
  --bg-2: #141110;
  --s1: #191513;
  --s2: #201b18;
  --s3: #2a2421;
  --line: rgba(245, 240, 232, 0.08);
  --line-2: rgba(245, 240, 232, 0.14);
  --fg: #f5f0e8;
  --fg-2: #d4ccc1;
  --muted: #a39a90;
  --ember: #f26a2e;
  --ember-2: #f7934c;
  --ember-3: #fbb46e;
  --ember-glow: rgba(242, 106, 46, 0.14);
  --pass: #7fbf8e;
  --fail: #ef7559;
  --radius: 14px;
  --radius-sm: 8px;
  --wrap: 1180px;
  --sans: "Inter", ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial,
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code", Menlo, Consolas, "Liberation Mono",
    "PingFang SC", monospace;
  color-scheme: dark;
}

*,
*::before,
*::after { box-sizing: border-box; }
[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg-2);
  font: 16px/1.65 var(--sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--fg); text-decoration-color: rgba(242, 106, 46, 0.5); text-underline-offset: 3px; }
a:hover { color: var(--ember-3); }
code, pre, kbd { font-family: var(--mono); }
p code, li code, td code, dd code, summary code {
  font-size: 0.86em;
  padding: 0.12em 0.4em;
  border-radius: 5px;
  background: rgba(245, 240, 232, 0.06);
  border: 1px solid var(--line);
  color: var(--fg);
  white-space: nowrap;
}
h1, h2, h3, h4 { color: var(--fg); margin: 0; line-height: 1.12; letter-spacing: -0.025em; font-weight: 650; }
p { margin: 0; }
::selection { background: rgba(242, 106, 46, 0.35); color: #fff; }

:focus-visible { outline: 2px solid var(--ember-2); outline-offset: 3px; border-radius: 4px; }

.skip {
  position: absolute; left: 16px; top: -60px; z-index: 100;
  padding: 10px 14px; border-radius: 8px; background: var(--ember); color: #141110; font-weight: 600;
}
.skip:focus { top: 12px; }

.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.mono { font-family: var(--mono); }
.ember { color: var(--ember); }
.pass { color: var(--pass); }
.fail { color: var(--fail); }
.muted { color: var(--muted); }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(16, 13, 12, 0.72);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}
.site-header.scrolled { border-bottom-color: var(--line); }
.nav { display: flex; align-items: center; gap: 28px; height: 64px; }
.brand { display: inline-flex; align-items: center; flex: none; }
.brand img { height: 26px; width: auto; }
.nav-links { display: flex; gap: 22px; margin: 0; padding: 0; list-style: none; font-size: 14px; }
.nav-links a { color: var(--muted); text-decoration: none; transition: color 0.15s; }
.nav-links a:hover { color: var(--fg); }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.lang {
  font: 500 13px/1 var(--mono); color: var(--muted); text-decoration: none;
  padding: 8px 10px; border-radius: 8px; border: 1px solid transparent;
}
.lang:hover { color: var(--fg); border-color: var(--line-2); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 44px; padding: 0 18px; border-radius: 10px;
  font: 600 15px/1 var(--sans); text-decoration: none; white-space: nowrap;
  border: 1px solid var(--line-2); color: var(--fg); background: rgba(245, 240, 232, 0.03);
  transition: background 0.15s, border-color 0.15s, transform 0.15s, box-shadow 0.15s;
}
.btn:hover { color: var(--fg); background: rgba(245, 240, 232, 0.07); border-color: rgba(245, 240, 232, 0.24); }
.btn svg { width: 18px; height: 18px; flex: none; }
.btn-primary {
  background: var(--ember); border-color: var(--ember); color: #170f0b;
  box-shadow: 0 0 0 1px rgba(242, 106, 46, 0.2), 0 8px 30px -8px rgba(242, 106, 46, 0.55);
}
.btn-primary:hover { background: var(--ember-2); border-color: var(--ember-2); color: #170f0b; }
.btn-sm { height: 36px; padding: 0 13px; font-size: 14px; border-radius: 9px; }
.btn-ghost { border-color: transparent; background: none; color: var(--muted); }
.btn-ghost:hover { background: none; border-color: transparent; color: var(--fg); }
.btn .arrow { transition: transform 0.15s; }
.btn:hover .arrow { transform: translateX(3px); }

/* ---------- hero ---------- */
.hero { position: relative; padding: 88px 0 72px; overflow: hidden; isolation: isolate; }
.hero::before {
  /* forge grid, faded at the edges */
  content: ""; position: absolute; inset: 0; z-index: -1;
  background-image:
    linear-gradient(rgba(245, 240, 232, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(245, 240, 232, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(70% 70% at 60% 30%, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(70% 70% at 60% 30%, #000 20%, transparent 75%);
}
.hero::after {
  content: ""; position: absolute; z-index: -1; width: 900px; height: 700px; right: -200px; top: -260px;
  background: radial-gradient(closest-side, rgba(242, 106, 46, 0.18), transparent 70%);
  pointer-events: none;
}
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(0, 1fr); gap: 56px; align-items: center; }
.pill {
  display: inline-flex; align-items: center; gap: 10px; padding: 6px 12px 6px 8px;
  border: 1px solid var(--line-2); border-radius: 999px; background: rgba(245, 240, 232, 0.03);
  font: 500 12.5px/1.2 var(--mono); color: var(--fg-2); letter-spacing: 0.01em;
}
.pill b {
  font-weight: 600; color: #170f0b; background: var(--ember); border-radius: 999px; padding: 3px 8px;
  font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase;
}
.hero h1 { margin-top: 24px; font-size: clamp(2.5rem, 5vw, 4.15rem); letter-spacing: -0.04em; line-height: 1.02; font-weight: 700; }
.hero h1 span { display: block; }
.hero h1 .hot {
  background: linear-gradient(92deg, var(--ember) 0%, var(--ember-2) 55%, var(--ember-3) 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lede { margin-top: 24px; font-size: clamp(1.05rem, 1.5vw, 1.2rem); line-height: 1.6; color: var(--fg-2); max-width: 36em; }
.lede strong { color: var(--fg); font-weight: 600; }
.cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.facts { display: flex; flex-wrap: wrap; gap: 8px 22px; margin: 34px 0 0; padding: 0; list-style: none; font: 13px/1.4 var(--mono); color: var(--muted); }
.facts li { display: inline-flex; align-items: center; gap: 8px; }
.facts li::before { content: ""; width: 5px; height: 5px; border-radius: 1px; background: var(--ember); transform: rotate(45deg); }

/* gate card */
.gate-card {
  position: relative; border-radius: 16px; border: 1px solid var(--line-2);
  background: linear-gradient(180deg, rgba(36, 31, 28, 0.92), rgba(22, 19, 17, 0.96));
  box-shadow: 0 40px 80px -30px rgba(0, 0, 0, 0.8), 0 0 0 1px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.05);
  font-family: var(--mono); font-size: 13px; color: var(--fg-2); overflow: hidden;
}
.gate-card::before {
  content: ""; position: absolute; inset: -1px; border-radius: inherit; pointer-events: none;
  background: linear-gradient(140deg, rgba(242, 106, 46, 0.35), transparent 30%, transparent 70%, rgba(242, 106, 46, 0.12));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; padding: 1px;
}
.card-bar { display: flex; align-items: center; gap: 12px; padding: 12px 16px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.dots { display: inline-flex; gap: 6px; }
.dots i { width: 10px; height: 10px; border-radius: 50%; background: #3a332e; }
.card-bar .path { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.card-bar .tag { margin-left: auto; padding: 2px 8px; border-radius: 6px; border: 1px solid var(--line-2); font-size: 11px; color: var(--fg-2); }

.track { display: grid; grid-template-columns: repeat(4, 1fr); padding: 22px 18px 18px; position: relative; }
.track::before {
  content: ""; position: absolute; left: calc(12.5% + 4px); right: calc(12.5% + 4px); top: 36px; height: 2px;
  background: var(--s3); border-radius: 2px;
}
.track .fill {
  position: absolute; left: calc(12.5% + 4px); top: 36px; height: 2px; border-radius: 2px;
  width: calc(75% - 8px); transform-origin: left; transform: scaleX(var(--p, 1));
  background: linear-gradient(90deg, var(--fail), var(--pass) 35%, var(--ember-2));
  transition: transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.node { position: relative; display: grid; justify-items: center; gap: 10px; text-align: center; }
.node .dot {
  width: 30px; height: 30px; border-radius: 50%; display: grid; place-items: center;
  background: var(--s1); border: 2px solid var(--s3); color: var(--muted); font-size: 12px; font-weight: 700;
  transition: background 0.35s, border-color 0.35s, color 0.35s, box-shadow 0.35s;
}
.node .lbl { font-size: 11px; letter-spacing: 0.12em; color: var(--muted); transition: color 0.35s; }
.node .dot::after { content: attr(data-idle); }
.node.on .dot::after { content: attr(data-on); }
.node.red.on .dot { border-color: var(--fail); color: var(--fail); background: linear-gradient(rgba(239, 117, 89, 0.14), rgba(239, 117, 89, 0.14)), var(--s1); }
.node.green.on .dot, .node.review.on .dot { border-color: var(--pass); color: var(--pass); background: linear-gradient(rgba(127, 191, 142, 0.14), rgba(127, 191, 142, 0.14)), var(--s1); }
.node.done.on .dot { border-color: var(--ember); background: var(--ember); color: #170f0b; box-shadow: 0 0 0 6px rgba(242, 106, 46, 0.16), 0 0 28px rgba(242, 106, 46, 0.6); }
.node.on .lbl { color: var(--fg); }
.node.active .dot { border-color: var(--ember-2); color: var(--ember-3); animation: pulse 1.2s ease-in-out infinite; }
.node.active .lbl { color: var(--ember-3); }
@keyframes pulse { 0%, 100% { box-shadow: 0 0 0 0 rgba(242, 106, 46, 0.45); } 50% { box-shadow: 0 0 0 7px rgba(242, 106, 46, 0); } }

.log { list-style: none; margin: 0; padding: 4px 8px 8px; border-top: 1px solid var(--line); }
.log li {
  display: grid; grid-template-columns: 7.6em minmax(0, 1fr) auto; align-items: center; gap: 12px;
  padding: 7px 10px; border-radius: 7px; transition: opacity 0.4s ease, transform 0.4s ease, background 0.4s;
}
.log li .k { color: var(--muted); }
.log li .v { color: var(--fg); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.badge {
  display: inline-block; padding: 2px 8px; border-radius: 6px; font-size: 11.5px; line-height: 1.5; white-space: nowrap;
  border: 1px solid currentColor;
}
.badge.fail { color: var(--fail); background: rgba(239, 117, 89, 0.08); }
.badge.pass { color: var(--pass); background: rgba(127, 191, 142, 0.08); }
.badge.hot { color: #170f0b; background: var(--ember); border-color: var(--ember); font-weight: 700; }
.term-foot { border-top: 1px solid var(--line); padding: 12px 18px 16px; transition: opacity 0.4s ease; }
.term-foot .cmd { color: var(--fg); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.term-foot .cmd::before { content: "$ "; color: var(--ember); }
.term-foot .out { color: var(--muted); margin-top: 4px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.term-foot .out b { color: var(--ember-3); font-weight: 600; }

/* animated state (JS adds .anim, then .s1..s4 cumulatively) */
.gate-card.anim .log li, .gate-card.anim .term-foot { opacity: 0.18; }
.gate-card.anim.s1 .r1, .gate-card.anim.s2 .r2, .gate-card.anim.s3 .r3, .gate-card.anim.s4 .term-foot { opacity: 1; }
.gate-card.anim.s1:not(.s2) .r1, .gate-card.anim.s2:not(.s3) .r2, .gate-card.anim.s3:not(.s4) .r3 { background: rgba(245, 240, 232, 0.035); }

.loopline {
  display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin-top: 64px;
  font: 12px/1 var(--mono); color: var(--muted); justify-content: center;
}
.loopline span { padding: 7px 10px; border: 1px solid var(--line); border-radius: 7px; background: rgba(245, 240, 232, 0.02); color: var(--fg-2); }
.loopline span.hot { border-color: rgba(242, 106, 46, 0.5); color: var(--ember-3); background: var(--ember-glow); }
.loopline i { font-style: normal; color: #5f5751; }

/* ---------- sections ---------- */
section.block { padding: 112px 0; border-top: 1px solid var(--line); position: relative; }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; font: 500 12px/1 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--ember-2); }
.eyebrow .n { color: var(--muted); }
.section-head { max-width: 760px; margin-bottom: 56px; }
.section-head h2 { margin-top: 18px; font-size: clamp(2rem, 4vw, 3.1rem); letter-spacing: -0.035em; }
.section-head p { margin-top: 18px; font-size: 1.1rem; color: var(--fg-2); max-width: 44em; }
h3 { font-size: 1.35rem; letter-spacing: -0.02em; }
.sub { margin-top: 88px; }
.sub > h3 { margin-bottom: 10px; }
.sub > p.sub-lede { max-width: 46em; color: var(--fg-2); margin-bottom: 28px; }

/* generic table */
.table-wrap { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--bg-2); }
.table-scroll { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { text-align: left; vertical-align: top; padding: 16px 20px; border-bottom: 1px solid var(--line); }
tr:last-child > * { border-bottom: 0; }
thead th { font: 500 12px/1.4 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); background: rgba(245, 240, 232, 0.02); }
tbody th { color: var(--fg); font-weight: 600; }
td { color: var(--fg-2); }

/* problem comparison */
.versus th[scope="row"] { width: 30%; font-weight: 500; }
.versus td.weak { color: var(--muted); width: 26%; }
.versus td.strong { color: var(--fg); background: linear-gradient(90deg, rgba(242, 106, 46, 0.06), transparent 80%); }
.versus thead th.hepha { color: var(--ember-2); }
.callout {
  display: grid; grid-template-columns: auto 1fr; gap: 16px; margin-top: 24px; padding: 20px 22px;
  border: 1px dashed var(--line-2); border-radius: var(--radius); color: var(--fg-2); font-size: 15px;
}
.callout .ic { width: 28px; height: 28px; border-radius: 8px; display: grid; place-items: center; background: rgba(245, 240, 232, 0.06); color: var(--ember-2); font: 700 14px/1 var(--mono); }
.callout strong { color: var(--fg); }

/* loop steps */
.steps-grid { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 12px; counter-reset: none; }
.step {
  display: flex; flex-direction: column; gap: 8px; min-height: 212px; padding: 18px 16px 16px;
  border: 1px solid var(--line); border-radius: 12px; background: var(--bg-2);
  transition: border-color 0.2s, transform 0.2s;
}
.step:hover { border-color: var(--line-2); transform: translateY(-2px); }
.step .num { font: 500 11px/1 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }
.step h3 { font: 700 15px/1.2 var(--mono); letter-spacing: 0.06em; margin-top: 4px; }
.step p { font-size: 14px; line-height: 1.5; color: var(--muted); }
.step p code { font-size: 12px; white-space: normal; }
.step > code { margin-top: auto; padding: 12px 0 0; border: 0; border-top: 1px dashed var(--line-2); border-radius: 0; background: none; font-size: 12px; line-height: 1.5; color: var(--fg-2); white-space: normal; word-break: break-word; }
.step.forge { border-color: rgba(242, 106, 46, 0.28); background: linear-gradient(180deg, rgba(242, 106, 46, 0.09), var(--bg-2) 70%); }
.step.forge h3, .step.forge .num { color: var(--ember-3); }

/* state machine + gates */
.states { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-bottom: 22px; font: 13px/1 var(--mono); color: var(--muted); }
.states .st { padding: 8px 12px; border: 1px solid var(--line-2); border-radius: 8px; color: var(--fg); background: var(--bg-2); }
.states .st.done { border-color: rgba(242, 106, 46, 0.55); color: var(--ember-3); background: var(--ember-glow); }
.states .side { margin-left: 8px; color: var(--muted); }
.gates { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.gate { padding: 22px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg-2); }
.gate h4 { font: 600 15px/1 var(--mono); color: var(--fg); display: flex; align-items: center; gap: 8px; }
.gate h4 .arr { color: var(--ember); }
.gate .refuse { margin: 10px 0 12px; font: 500 11px/1 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }
.gate ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 9px; font-size: 14.5px; }
.gate li { position: relative; padding-left: 20px; color: var(--fg-2); line-height: 1.5; }
.gate li::before { content: ""; position: absolute; left: 2px; top: 0.62em; width: 8px; height: 2px; background: var(--ember); }

/* terminal */
.term {
  border: 1px solid var(--line-2); border-radius: var(--radius); overflow: hidden;
  background: #0c0a09; font: 13.5px/1.7 var(--mono); color: var(--fg-2);
  box-shadow: 0 30px 60px -30px rgba(0, 0, 0, 0.7);
}
.term .card-bar { background: var(--bg-2); }
.term pre { margin: 0; padding: 18px 20px; overflow-x: auto; white-space: pre; }
.term .p { color: var(--ember); user-select: none; }
.term .c { color: #8f867d; }
.term .e { color: var(--fail); }
.term .o { color: var(--pass); }
.term .h { color: var(--fg); }
.split { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 28px; align-items: start; }
.split.even { grid-template-columns: 1fr 1fr; }
.prose { display: grid; gap: 16px; font-size: 15.5px; }
.prose p strong { color: var(--fg); }
.prose h3, .prose h4 { font-size: 1.1rem; letter-spacing: -0.015em; }
.mini-list { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.mini-list li { display: grid; grid-template-columns: 22px 1fr; gap: 8px; font-size: 15px; }
.mini-list li::before { content: "→"; color: var(--ember); font-family: var(--mono); }
.seq { display: flex; flex-wrap: wrap; gap: 6px; font: 12.5px/1 var(--mono); }
.seq span { padding: 6px 9px; border-radius: 6px; border: 1px solid var(--line-2); }
.seq .f { color: var(--fail); border-color: rgba(239, 117, 89, 0.4); }
.seq .ok { color: var(--pass); border-color: rgba(127, 191, 142, 0.4); }

/* lite table */
.modes td, .modes th { text-align: center; }
.modes th:first-child, .modes td:first-child { text-align: left; }
.modes .y { color: var(--pass); font-weight: 700; }
.modes .n { color: #8f867d; }
.modes thead th.full { color: var(--fg); }

/* ---------- evidence screenshots ---------- */
.tabs { display: inline-flex; gap: 4px; padding: 4px; border: 1px solid var(--line); border-radius: 11px; background: var(--bg-2); margin-bottom: 18px; max-width: 100%; overflow-x: auto; scrollbar-width: none; }
.tab { flex: none; }
.zoom { display: block; cursor: zoom-in; }
.tab {
  appearance: none; border: 0; background: none; cursor: pointer;
  padding: 8px 14px; border-radius: 8px; font: 500 14px/1.2 var(--sans); color: var(--muted);
}
.tab:hover { color: var(--fg); }
.tab[aria-selected="true"] { background: var(--s3); color: var(--fg); box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06); }
.browser { border: 1px solid var(--line-2); border-radius: var(--radius); overflow: hidden; background: var(--bg-2); box-shadow: 0 50px 100px -40px rgba(0, 0, 0, 0.85), 0 0 0 1px rgba(0, 0, 0, 0.5); }
.browser .card-bar .url { flex: 1; max-width: 420px; margin: 0 auto; padding: 5px 12px; border-radius: 7px; background: rgba(245, 240, 232, 0.05); text-align: center; color: var(--muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.shot figure { margin: 0; }
.shot img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; object-position: top; background: #1a1614; }
.shot figcaption { padding: 14px 18px; border-top: 1px solid var(--line); font-size: 14px; color: var(--muted); }
.shot figcaption b { color: var(--fg); font-weight: 600; }
.ui-notes { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 22px; }
.ui-note { padding: 16px 18px; border: 1px solid var(--line); border-radius: 12px; font-size: 14px; color: var(--muted); }
.ui-note b { display: block; margin-bottom: 4px; color: var(--fg); font-weight: 600; font-size: 14.5px; }
.fine { margin-top: 16px; font-size: 13.5px; color: var(--muted); }

/* ---------- wiki layers ---------- */
.layers { display: grid; gap: 10px; }
.layer {
  display: grid; grid-template-columns: 170px minmax(0, 1fr) minmax(0, 1.1fr); gap: 20px; align-items: center;
  padding: 18px 22px; border: 1px solid var(--line); border-radius: 12px; background: var(--bg-2);
}
.layer .name { font: 600 13px/1.2 var(--mono); letter-spacing: 0.06em; text-transform: uppercase; color: var(--fg); display: flex; align-items: center; gap: 10px; }
.layer .name i { width: 8px; height: 8px; border-radius: 2px; background: var(--ember); opacity: var(--o, 1); }
.layer .q { color: var(--fg-2); font-size: 15px; }
.layer code { font-size: 12.5px; color: var(--muted); word-break: break-all; }
.lineage { display: flex; flex-wrap: wrap; align-items: stretch; gap: 0; margin-top: 8px; }
.lineage .lk { display: grid; gap: 4px; padding: 12px 16px; border: 1px solid var(--line-2); background: var(--bg-2); min-width: 0; }
.lineage .lk + .lk { border-left: 0; }
.lineage .lk:first-child { border-radius: 10px 0 0 10px; }
.lineage .lk:last-child { border-radius: 0 10px 10px 0; border-color: rgba(242, 106, 46, 0.5); background: var(--ember-glow); }
.lineage .lk span { font: 500 10.5px/1 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }
.lineage .lk b { font: 600 13.5px/1.3 var(--mono); color: var(--fg); }
.lifecycle { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; font: 12.5px/1 var(--mono); color: var(--muted); }
.lifecycle span { padding: 6px 9px; border-radius: 6px; border: 1px solid var(--line-2); color: var(--fg-2); }
.lifecycle span.pub { color: var(--pass); border-color: rgba(127, 191, 142, 0.45); }

/* ---------- install ---------- */
.install-layout { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); gap: 64px; align-items: start; }
.install-intro { position: sticky; top: 96px; }
.install-intro .section-head { margin-bottom: 28px; }
.install-intro .section-head h2 { font-size: clamp(2rem, 3.4vw, 2.7rem); }
.install-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 0; }
.istep { display: grid; grid-template-columns: 44px minmax(0, 1fr); gap: 18px; padding-bottom: 30px; position: relative; }
.istep::before { content: ""; position: absolute; left: 21px; top: 44px; bottom: 6px; width: 1px; background: var(--line-2); }
.istep:last-child::before { display: none; }
.istep .bubble { width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center; border: 1px solid var(--line-2); background: var(--bg-2); font: 600 14px/1 var(--mono); color: var(--ember-2); }
.istep h3 { font-size: 1.1rem; margin: 10px 0 6px; }
.istep p { color: var(--fg-2); font-size: 15px; margin-bottom: 14px; }
.code { border: 1px solid var(--line-2); border-radius: 12px; overflow: hidden; background: #0c0a09; }
.code-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 6px 6px 6px 14px; border-bottom: 1px solid var(--line); background: var(--bg-2); font: 12px/1 var(--mono); color: var(--muted); }
.copy {
  appearance: none; cursor: pointer; display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 10px; border-radius: 7px; border: 1px solid var(--line-2); background: rgba(245, 240, 232, 0.03);
  font: 500 12px/1 var(--mono); color: var(--fg-2); transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.copy:hover { color: var(--fg); border-color: rgba(245, 240, 232, 0.28); }
.copy svg { width: 13px; height: 13px; }
.copy.ok { color: var(--pass); border-color: rgba(127, 191, 142, 0.5); }
.code pre { margin: 0; padding: 16px 18px; overflow-x: auto; font-size: 13.5px; line-height: 1.7; color: var(--fg); }
.code .c { color: #8f867d; }
.notes { margin: 6px 0 0; padding: 0; list-style: none; display: grid; gap: 10px; font-size: 14.5px; color: var(--muted); }
.notes li { padding-left: 18px; position: relative; }
.notes li::before { content: "·"; position: absolute; left: 4px; color: var(--ember); font-weight: 700; }
.notes strong { color: var(--fg-2); }

.cli td:first-child { width: 46%; }
.cli td:first-child code { white-space: normal; word-break: break-word; font-size: 13px; color: var(--fg); background: none; border: 0; padding: 0; }
.cli td { font-size: 14.5px; padding: 13px 20px; }

/* ---------- compare ---------- */
.compare th[scope="row"] { width: 16%; color: var(--fg); font-size: 14px; }
.compare td { font-size: 14.5px; width: 28%; }
.compare .hepha { background: linear-gradient(180deg, rgba(242, 106, 46, 0.07), rgba(242, 106, 46, 0.03)); color: var(--fg); }
.compare thead th.hepha { color: var(--ember-2); }
.compare thead th a { color: inherit; }
.guide { margin-top: 22px; font-size: 15px; color: var(--fg-2); max-width: 60em; }
.guide strong { color: var(--fg); }

/* ---------- faq ---------- */
.faq { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.faq details { border: 1px solid var(--line); border-radius: 12px; background: var(--bg-2); transition: border-color 0.2s; }
.faq details[open] { border-color: var(--line-2); }
.faq summary {
  cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 16px; align-items: center;
  padding: 18px 20px; color: var(--fg); font-weight: 600; font-size: 15.5px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font: 400 20px/1 var(--mono); color: var(--ember-2); transition: transform 0.2s; flex: none; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq details p { padding: 0 20px 20px; font-size: 14.5px; color: var(--fg-2); }

/* ---------- closing CTA ---------- */
.closing { padding: 120px 0; border-top: 1px solid var(--line); text-align: center; position: relative; overflow: hidden; isolation: isolate; }
.closing::before {
  content: ""; position: absolute; z-index: -1; left: 50%; top: 100%; width: 1100px; height: 700px; transform: translate(-50%, -50%);
  background: radial-gradient(closest-side, rgba(242, 106, 46, 0.22), transparent 72%);
}
.closing img.mark { width: 64px; height: 64px; margin: 0 auto 26px; }
.closing h2 { font-size: clamp(2rem, 4.4vw, 3.3rem); letter-spacing: -0.04em; }
.closing p { margin: 16px auto 0; max-width: 34em; color: var(--fg-2); font-size: 1.1rem; }
.closing .cta { justify-content: center; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line); padding: 44px 0 56px; font-size: 14px; color: var(--muted); }
.foot { display: flex; flex-wrap: wrap; gap: 24px 48px; justify-content: space-between; align-items: flex-start; }
.foot .brand img { height: 22px; }
.foot p { margin-top: 12px; max-width: 30em; }
.foot ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 10px 22px; }
.foot a { color: var(--fg-2); text-decoration: none; }
.foot a:hover { color: var(--ember-3); }

/* ---------- Chinese typography ---------- */
:lang(zh) h1, :lang(zh) h2, :lang(zh) h3 { letter-spacing: -0.01em; }
:lang(zh) .hero h1 { letter-spacing: -0.02em; line-height: 1.15; font-size: clamp(2.3rem, 4.3vw, 3.6rem); }
.hero h1 .nb { display: inline-block; }
:lang(zh) .section-head h2 { line-height: 1.22; }
:lang(zh) .eyebrow, :lang(zh) .step .num, :lang(zh) .gate .refuse { letter-spacing: 0.08em; }
:lang(zh) body, :lang(zh) .lede { line-height: 1.75; }

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .nav-links { display: none; }
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .steps-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .step { min-height: 0; }
  .ui-notes { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 820px) {
  section.block { padding: 84px 0; }
  .split, .split.even, .install-layout { grid-template-columns: minmax(0, 1fr); }
  .install-layout { gap: 8px; }
  .install-intro { position: static; }
  .gates { grid-template-columns: 1fr; }
  .faq { grid-template-columns: 1fr; }
  .layer { grid-template-columns: 1fr; gap: 6px; }
  .sub { margin-top: 64px; }
}
@media (max-width: 640px) {
  body { font-size: 15.5px; }
  .wrap { padding: 0 18px; }
  .hero { padding: 56px 0 56px; }
  .hero h1 { font-size: clamp(2.35rem, 10.5vw, 3rem); }
  .cta .btn { flex: 1 1 auto; }
  .nav { gap: 12px; }
  .nav-right .btn-sm .label { display: none; }
  .steps-grid { gap: 8px; }
  .step { padding: 14px 12px; }
  .step p { font-size: 13px; }
  .ui-notes { grid-template-columns: 1fr; }
  .tab { padding: 8px 11px; font-size: 13.5px; }
  .log li { grid-template-columns: minmax(0, 1fr) auto; grid-template-areas: "k b" "v v"; gap: 2px 8px; padding: 6px 8px; }
  .log li .k { grid-area: k; }
  .log li .badge { grid-area: b; }
  .log li .v { grid-area: v; }
  .card-bar .dots { display: none; }
  .card-bar .tag { white-space: nowrap; }
  .term pre, .code pre { white-space: pre-wrap; word-break: break-word; font-size: 12.5px; }
  p code, li code, td code, dd code { white-space: normal; word-break: break-word; }
  .cli thead { display: none; }
  .istep { grid-template-columns: 34px minmax(0, 1fr); gap: 12px; }
  .istep .bubble { width: 34px; height: 34px; border-radius: 10px; }
  .istep::before { left: 16px; top: 38px; }
  .istep h3 { margin-top: 5px; }
  .gate-card { font-size: 12px; }
  .track { padding: 18px 8px 14px; }
  .node .lbl { font-size: 10px; letter-spacing: 0.08em; }
  .loopline { margin-top: 44px; justify-content: flex-start; }
  .section-head { margin-bottom: 40px; }
  th, td { padding: 13px 14px; }
  /* stack comparison tables into cards */
  .stack thead { display: none; }
  .stack, .stack tbody, .stack tr, .stack th, .stack td { display: block; width: auto !important; }
  .stack tr { padding: 14px 0; border-bottom: 1px solid var(--line); }
  .stack tr:last-child { border-bottom: 0; }
  .stack th, .stack td { border: 0; padding: 4px 16px; }
  .stack th[scope="row"] { padding-bottom: 8px; font-size: 15px; }
  .stack td::before { content: attr(data-label); display: block; font: 500 10.5px/1.6 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }
  .stack td.strong::before, .stack td.hepha::before { color: var(--ember-2); }
  .stack td + td { margin-top: 8px; }
  .stack td.strong, .stack td.hepha { background: none; border-left: 2px solid var(--ember); margin-left: 16px; padding-left: 12px; }
  .cli td:first-child { width: auto; }
  .cli tr { display: block; padding: 10px 0; border-bottom: 1px solid var(--line); }
  .cli td { display: block; border: 0; padding: 3px 14px; }
  .lineage { flex-direction: column; }
  .lineage .lk + .lk { border-left: 1px solid var(--line-2); border-top: 0; }
  .lineage .lk:first-child { border-radius: 10px 10px 0 0; }
  .lineage .lk:last-child { border-radius: 0 0 10px 10px; }
  .closing { padding: 88px 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}