@import url("https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&family=Fragment+Mono&family=Host+Grotesk:wght@500;600;700&display=swap");

/* DSHRSI site. One stylesheet, no build step.
   Scale, radii and neutrals follow the look of deepseek.com; the mark and the wording are DSHRSI's own. */

:root {
  --font-sans: "DM Sans", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-display: "Host Grotesk", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Fragment Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Noto Sans SC", "PingFang SC", monospace;

  --space-1: 4px; --space-2: 8px; --space-3: 12px; --space-4: 16px; --space-5: 24px;
  --space-6: 32px; --space-7: 40px; --space-8: 56px; --space-9: 80px; --space-10: 120px;
  --radius-sm: 8px; --radius-input: 10px; --radius-panel: 16px; --radius-card: 24px; --radius-pill: 100px;
  --page: 1160px;

  --bg: #ffffff;
  --bg-soft: #f9f8f8;
  --surface: rgba(0, 0, 0, 0.03);
  --surface-strong: rgba(0, 0, 0, 0.05);
  --glass: hsla(0, 0%, 100%, 0.62);
  --text: #202124;
  --text-2: rgba(32, 33, 36, 0.82);
  --text-3: rgba(32, 33, 36, 0.62);
  --border: rgba(32, 33, 36, 0.14);
  --divider: rgba(32, 33, 36, 0.1);
  --brand: #4d6bfe;
  --brand-deep: #3a65c2;
  --brand-soft: rgba(77, 107, 254, 0.1);
  --link: #234792;
  --good: #15803d;
  --bad: #b91c1c;
  --warn: #a16207;
  --code-bg: #0f1115;
  --code-text: #e6e9ef;
  --shadow-card: 0 0 0 1px #f1f5f9, 0 2px 4px rgba(0, 0, 0, 0.05), 0 12px 24px rgba(0, 0, 0, 0.05);
  --hero-a: #dfe9ff; --hero-b: #eef3ff; --hero-glow-1: rgba(77, 107, 254, 0.26); --hero-glow-2: rgba(115, 163, 210, 0.34);
  /* chart series, checked with the dataviz palette validator on both surfaces: the plugin carries the brand, stock DSH the warm hue */
  --series-base: #eb6834; --series-rsi: #4d6bfe; --grid: rgba(32, 33, 36, 0.1);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0a0a0a; --bg-soft: #111214; --surface: hsla(0, 0%, 100%, 0.06); --surface-strong: hsla(0, 0%, 100%, 0.1);
    --glass: hsla(0, 0%, 100%, 0.07); --text: #ffffff; --text-2: hsla(0, 0%, 100%, 0.8); --text-3: hsla(0, 0%, 100%, 0.56);
    --border: hsla(0, 0%, 100%, 0.12); --divider: hsla(0, 0%, 100%, 0.1); --brand: #6799fe; --brand-deep: #8fb3ff;
    --brand-soft: rgba(103, 153, 254, 0.14); --link: #9cc1e7; --good: #4ade80; --bad: #f87171; --warn: #fbbf24;
    --code-bg: #111318; --shadow-card: hsla(0, 0%, 100%, 0.12) 0 1px 0 0 inset, 0 0 0 1px hsla(0, 0%, 100%, 0.06);
    --hero-a: #0c1430; --hero-b: #0a0d18; --hero-glow-1: rgba(77, 107, 254, 0.34); --hero-glow-2: rgba(46, 96, 159, 0.4);
    --series-base: #d95926; --series-rsi: #5a8af0; --grid: hsla(0, 0%, 100%, 0.12);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0a0a0a; --bg-soft: #111214; --surface: hsla(0, 0%, 100%, 0.06); --surface-strong: hsla(0, 0%, 100%, 0.1);
  --glass: hsla(0, 0%, 100%, 0.07); --text: #ffffff; --text-2: hsla(0, 0%, 100%, 0.8); --text-3: hsla(0, 0%, 100%, 0.56);
  --border: hsla(0, 0%, 100%, 0.12); --divider: hsla(0, 0%, 100%, 0.1); --brand: #6799fe; --brand-deep: #8fb3ff;
  --brand-soft: rgba(103, 153, 254, 0.14); --link: #9cc1e7; --good: #4ade80; --bad: #f87171; --warn: #fbbf24;
  --code-bg: #111318; --shadow-card: hsla(0, 0%, 100%, 0.12) 0 1px 0 0 inset, 0 0 0 1px hsla(0, 0%, 100%, 0.06);
  --hero-a: #0c1430; --hero-b: #0a0d18; --hero-glow-1: rgba(77, 107, 254, 0.34); --hero-glow-2: rgba(46, 96, 159, 0.4);
  --series-base: #d95926; --series-rsi: #5a8af0; --grid: hsla(0, 0%, 100%, 0.12);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.65 var(--font-sans); -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
img, svg { max-width: 100%; }
a { color: var(--link); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; border-radius: 4px; }

/* Two languages live in the markup; one is shown. */
html[data-lang="zh"] [lang="en"], html[data-lang="en"] [lang="zh"] { display: none !important; }

.wrap { width: min(var(--page), 100% - 32px); margin-inline: auto; }
.narrow { width: min(820px, 100% - 32px); margin-inline: auto; }

/* ---------- top bar ---------- */
.top { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--bg) 78%, transparent); backdrop-filter: saturate(160%) blur(14px); -webkit-backdrop-filter: saturate(160%) blur(14px); border-bottom: 1px solid transparent; transition: border-color .2s ease; }
.top.scrolled { border-bottom-color: var(--divider); }
.top .wrap { display: flex; align-items: center; gap: var(--space-5); height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--text); font: 600 19px/1 var(--font-display); letter-spacing: -0.01em; }
.brand:hover { text-decoration: none; }
.brand img { width: 28px; height: 28px; }
.nav { display: flex; gap: 2px; margin-left: var(--space-4); }
.nav a { padding: 8px 12px; border-radius: var(--radius-pill); color: var(--text-2); font-size: 15px; white-space: nowrap; }
.nav a:hover { background: var(--surface); text-decoration: none; color: var(--text); }
.nav a[aria-current="page"] { color: var(--text); background: var(--surface-strong); font-weight: 500; }
.top .grow { flex: 1; }
.lang { display: inline-flex; padding: 3px; border: 1px solid var(--border); border-radius: var(--radius-pill); }
.lang button { appearance: none; border: 0; background: none; color: var(--text-3); font: 500 13px/1 var(--font-sans); padding: 6px 10px; border-radius: var(--radius-pill); cursor: pointer; white-space: nowrap; }
.lang button[aria-pressed="true"] { background: var(--text); color: var(--bg); }
.menu { display: none; appearance: none; border: 1px solid var(--border); background: none; color: var(--text); border-radius: var(--radius-input); width: 40px; height: 40px; cursor: pointer; }

/* ---------- buttons ---------- */
.btn { display: inline-flex; align-items: center; gap: 8px; height: 44px; padding: 0 20px; border-radius: var(--radius-pill); border: 1px solid var(--border); background: var(--bg); color: var(--text); font: 500 15px/1 var(--font-sans); cursor: pointer; white-space: nowrap; transition: background .2s ease, border-color .2s ease, transform .2s ease; }
.btn:hover { text-decoration: none; background: var(--surface); }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn.primary:hover { background: var(--brand-deep); border-color: var(--brand-deep); }
.btn.glass { background: var(--glass); border-color: transparent; box-shadow: var(--shadow-card); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }
.btn.small { height: 36px; padding: 0 14px; font-size: 14px; }

/* ---------- hero ---------- */
.hero { position: relative; overflow: hidden; background: linear-gradient(180deg, var(--hero-a) 0%, var(--hero-b) 58%, var(--bg) 100%); }
.hero::before, .hero::after { content: ""; position: absolute; border-radius: 50%; filter: blur(70px); pointer-events: none; }
.hero::before { width: 620px; height: 620px; left: -160px; top: -220px; background: var(--hero-glow-1); }
.hero::after { width: 560px; height: 560px; right: -140px; top: 40px; background: var(--hero-glow-2); }
.hero .wrap { position: relative; z-index: 1; padding: var(--space-9) 0 var(--space-8); text-align: center; }
.hero.page .wrap { padding: var(--space-8) 0 var(--space-7); text-align: left; }
.news { display: inline-flex; align-items: center; gap: 8px; max-width: 100%; padding: 7px 14px 7px 8px; border-radius: var(--radius-pill); background: var(--glass); box-shadow: var(--shadow-card); color: var(--text-2); font-size: 14px; backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); }
.news:hover { text-decoration: none; color: var(--text); }
.news b { padding: 2px 9px; border-radius: var(--radius-pill); background: var(--brand); color: #fff; font-weight: 500; font-size: 12px; }
h1, h2, h3 { font-family: var(--font-display); letter-spacing: -0.02em; margin: 0; }
.hero h1 { margin-top: var(--space-5); font-size: clamp(38px, 6.2vw, 76px); line-height: 1.08; font-weight: 600; text-wrap: balance; }
.hero.page h1 { font-size: clamp(34px, 4.6vw, 54px); margin-top: var(--space-4); }
.hero h1 em { font-style: normal; background: linear-gradient(100deg, #7c5cff, var(--brand) 45%, #12b5e5); -webkit-background-clip: text; background-clip: text; color: transparent; }
.kicker { font: 500 13px/1 var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--brand); }
.lede { margin: var(--space-5) auto 0; max-width: 720px; font-size: clamp(17px, 1.6vw, 20px); line-height: 1.6; color: var(--text-2); text-wrap: pretty; }
.hero.page .lede { margin-left: 0; }
.cta { display: flex; flex-wrap: wrap; gap: var(--space-3); justify-content: center; margin-top: var(--space-6); }
.hero.page .cta { justify-content: flex-start; }

/* the session mock in the hero */
.stage { margin: var(--space-8) auto 0; max-width: 880px; text-align: left; border-radius: var(--radius-card); background: var(--glass); box-shadow: var(--shadow-card); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); padding: var(--space-5); }
.stage .ask { margin-left: auto; width: fit-content; max-width: 86%; padding: 10px 16px; border-radius: 18px; background: var(--brand-soft); color: var(--text); }
.stage ul { list-style: none; margin: var(--space-4) 0 0; padding: 0; display: grid; gap: 10px; font-size: 15px; color: var(--text-2); }
.stage li { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.stage code { font: 13px/1.4 var(--font-mono); }
.tag { display: inline-flex; align-items: center; gap: 6px; padding: 2px 9px; border-radius: var(--radius-pill); font: 500 12px/1.6 var(--font-mono); background: var(--surface-strong); color: var(--text-2); }
.tag.bad { background: color-mix(in srgb, var(--bad) 12%, transparent); color: var(--bad); }
.tag.good { background: color-mix(in srgb, var(--good) 14%, transparent); color: var(--good); }
.tag.brand { background: var(--brand-soft); color: var(--brand); }
.pill-rsi { margin-top: var(--space-5); display: flex; flex-wrap: wrap; align-items: center; gap: 10px; padding: 10px 16px; border-radius: var(--radius-pill); border: 1px solid color-mix(in srgb, var(--brand) 55%, transparent); background: linear-gradient(90deg, var(--brand-soft), transparent 70%), var(--bg); font-size: 14px; color: var(--text-2); position: relative; overflow: hidden; }
.pill-rsi strong { color: var(--text); }
.pill-rsi::after { content: ""; position: absolute; inset: 0; background: linear-gradient(100deg, transparent 30%, color-mix(in srgb, var(--brand) 22%, transparent) 50%, transparent 70%); transform: translateX(-100%); animation: sweep 3.6s ease-in-out infinite; }
@keyframes sweep { 55%, 100% { transform: translateX(100%); } }

/* ---------- sections ---------- */
section { padding: var(--space-9) 0; }
section.soft { background: var(--bg-soft); }
.head { max-width: 760px; margin-bottom: var(--space-7); }
.head.center { margin-inline: auto; text-align: center; }
.head h2 { margin-top: var(--space-3); font-size: clamp(28px, 3.4vw, 40px); line-height: 1.2; font-weight: 500; text-wrap: balance; }
.head p { margin: var(--space-4) 0 0; color: var(--text-3); font-size: 17px; }
h3 { font-size: 20px; line-height: 1.35; font-weight: 600; }
.grid { display: grid; gap: var(--space-5); }
.grid.c2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.c3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.c4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.card { border-radius: var(--radius-card); background: var(--bg); box-shadow: var(--shadow-card); padding: var(--space-6); }
section.soft .card { background: var(--bg); }
.card p { margin: var(--space-3) 0 0; color: var(--text-3); }
.card .num { font: 500 13px/1 var(--font-mono); color: var(--brand); letter-spacing: 0.06em; margin-bottom: var(--space-4); }
a.card { display: block; color: inherit; transition: transform .2s ease; }
a.card:hover { text-decoration: none; transform: translateY(-2px); }
a.card .go { display: inline-block; margin-top: var(--space-4); color: var(--brand); font-weight: 500; }

.stat { border-radius: var(--radius-card); padding: var(--space-6); background: var(--surface); }
.stat .value { font: 600 clamp(34px, 4vw, 48px)/1.05 var(--font-display); letter-spacing: -0.03em; }
.stat .value small { font-size: 0.45em; font-weight: 500; color: var(--text-3); letter-spacing: 0; margin-left: 4px; }
.stat .label { margin-top: var(--space-3); color: var(--text-2); font-weight: 500; }

/* ---------- prose pages ---------- */
.prose h2 { margin: var(--space-8) 0 var(--space-4); font-size: clamp(24px, 2.6vw, 30px); font-weight: 500; line-height: 1.25; scroll-margin-top: 88px; }
.prose h3 { margin: var(--space-6) 0 var(--space-3); scroll-margin-top: 88px; }
.prose p, .prose li { color: var(--text-2); }
.prose p { margin: var(--space-4) 0; }
.prose ul, .prose ol { padding-left: 22px; }
.prose li { margin: 6px 0; }
.prose strong { color: var(--text); }
code { font: 0.9em/1.5 var(--font-mono); padding: 1px 6px; border-radius: 6px; background: var(--surface-strong); }
pre { position: relative; margin: var(--space-4) 0; padding: var(--space-5); overflow-x: auto; border-radius: var(--radius-panel); background: var(--code-bg); color: var(--code-text); font: 13.5px/1.7 var(--font-mono); tab-size: 2; }
pre code { padding: 0; background: none; font: inherit; color: inherit; }
pre .c { color: #8b93a7; } pre .k { color: #9db4ff; } pre .s { color: #a8e6a1; } pre .f { color: #ffd580; }
.copy { position: absolute; top: 10px; right: 10px; height: 28px; padding: 0 10px; border-radius: var(--radius-sm); border: 1px solid hsla(0, 0%, 100%, 0.16); background: hsla(0, 0%, 100%, 0.06); color: #cfd6e4; font: 12px/1 var(--font-sans); cursor: pointer; }
.copy:hover { background: hsla(0, 0%, 100%, 0.14); }
.callout { margin: var(--space-5) 0; padding: var(--space-4) var(--space-5); border-radius: var(--radius-panel); background: var(--brand-soft); color: var(--text-2); }
.callout.warn { background: color-mix(in srgb, var(--warn) 12%, transparent); }
.callout strong { color: var(--text); }

.table { width: 100%; overflow-x: auto; border-radius: var(--radius-panel); box-shadow: var(--shadow-card); background: var(--bg); }
table { width: 100%; border-collapse: collapse; font-size: 15px; }
th, td { padding: 12px 16px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--divider); }
tr:last-child td { border-bottom: 0; }
th { font: 500 13px/1.4 var(--font-sans); color: var(--text-3); background: var(--surface); white-space: nowrap; }
td.n, th.n { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
td b.up { color: var(--good); } td b.down { color: var(--bad); }

/* side index on long pages */
.doc { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: var(--space-8); align-items: start; padding: var(--space-8) 0 var(--space-9); }
.toc { position: sticky; top: 88px; display: grid; gap: 2px; font-size: 14px; }
.toc a { padding: 6px 12px; border-radius: var(--radius-sm); color: var(--text-3); }
.toc a:hover { background: var(--surface); color: var(--text); text-decoration: none; }
.toc .t { padding: 6px 12px; font: 500 12px/1.6 var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-3); }

/* ---------- diagrams and charts ---------- */
.figure { border-radius: var(--radius-card); background: var(--bg); box-shadow: var(--shadow-card); padding: var(--space-5); }
.figure svg { display: block; width: 100%; height: auto; }
.figure figcaption, .figure .cap { margin-top: var(--space-3); color: var(--text-3); font-size: 14px; }
figure { margin: var(--space-5) 0; }
.legend { display: flex; flex-wrap: wrap; gap: var(--space-4); margin-bottom: var(--space-3); font-size: 14px; color: var(--text-2); }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 6px; }
.steps { counter-reset: step; display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--space-4); padding: 0; margin: 0; list-style: none; }
.steps > li { counter-increment: step; position: relative; padding: var(--space-5) var(--space-5) var(--space-5) 72px; border-radius: var(--radius-card); background: var(--bg); box-shadow: var(--shadow-card); }
.steps > li::before { content: counter(step); position: absolute; left: var(--space-5); top: var(--space-5); width: 32px; height: 32px; display: grid; place-items: center; border-radius: 50%; background: var(--brand); color: #fff; font: 600 14px/1 var(--font-mono); }
.steps h3 { margin: 2px 0 0; }
.steps p { margin: var(--space-2) 0 0; color: var(--text-3); }

/* ---------- the track: one square per session, in start order ---------- */
.track { display: grid; gap: 10px; }
.track .legend i.wrote { background: var(--bad); box-shadow: 0 0 0 2px var(--bg), 0 0 0 4px var(--brand); margin: 0 10px 0 4px; }
.track .legend i.hit { background: var(--bad); } .track .legend i.clean { background: var(--surface-strong); box-shadow: inset 0 0 0 1px var(--border); }
.track .lane { display: grid; grid-template-columns: 124px minmax(0, 1fr) 72px; gap: var(--space-4); align-items: center; }
.track .who { font-size: 14px; font-weight: 500; color: var(--text-2); }
.track .cells { display: grid; grid-template-columns: repeat(var(--n), minmax(0, 1fr)); gap: 2px; }
.track .cells i { height: 44px; border-radius: 4px; display: grid; place-items: center; font: 600 12px/1 var(--font-sans); font-style: normal; color: #fff; }
.track .cells i.clean { background: var(--surface-strong); }
.track .cells i.hit { background: var(--bad); }
.track .lane.rsi .cells i.clean { background: var(--brand-soft); }
.track .cells i.wrote { box-shadow: 0 0 0 2px var(--bg), 0 0 0 4px var(--brand); }
.track .n { font-size: 14px; color: var(--text-3); font-variant-numeric: tabular-nums; text-align: right; white-space: nowrap; }
.track .n b { font: 600 24px/1 var(--font-display); color: var(--text); }
.track .marks .mark { font-size: 12.5px; line-height: 1.3; color: var(--brand-deep); padding: 6px 0 0 8px; border-left: 2px solid var(--brand); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.track .marks .mark.wide { border-top: 2px solid var(--brand); border-left: 2px solid var(--brand); border-top-left-radius: 6px; }

/* ---------- a session, event by event ---------- */
.tl { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: minmax(0, 1fr); gap: 2px; }
.tl .ev { display: grid; grid-template-columns: 96px minmax(0, 1fr); gap: var(--space-4); padding: 12px var(--space-4); border-radius: var(--radius-sm); border-left: 3px solid transparent; }
.tl .when { font: 13px/1.5 var(--font-mono); color: var(--text-3); font-variant-numeric: tabular-nums; }
.tl .when b { display: block; font-weight: 500; color: var(--text-2); }
.tl .line { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.tl .line code { font: 13.5px/1.5 var(--font-mono); overflow-wrap: anywhere; }
.tl .dim { color: var(--text-3); font-size: 14px; }
.tl p { margin: 6px 0 0; color: var(--text-2); font-size: 15px; }
.tl .thought { font-style: italic; color: var(--text-3); }
.tl .result { margin-top: 6px; font: 12.5px/1.6 var(--font-mono); color: var(--text-3); white-space: pre-wrap; overflow-wrap: anywhere; }
.tl blockquote { margin: 8px 0 0; padding: 10px 14px; border-left: 3px solid var(--border); background: var(--surface); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; font: 13.5px/1.6 var(--font-mono); color: var(--text-2); overflow-wrap: anywhere; }
.tl mark { background: var(--brand-soft); color: var(--brand-deep); font-weight: 600; padding: 1px 5px; border-radius: 4px; }
.tl .ev.failed { background: color-mix(in srgb, var(--bad) 8%, transparent); border-left-color: var(--bad); }
.tl .ev.failed .result { color: var(--bad); }
.tl .ev.rsi { background: var(--brand-soft); border-left-color: var(--brand); }
.tl .ev.rsi .result { color: var(--text-2); }
.tl .ev.end { background: var(--surface); }
.tl .gate { list-style: none; margin: 8px 0 0; padding: 0; display: grid; gap: 6px; font-size: 14px; color: var(--text-2); }
.tl .gate li { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.tl .gate b { font-weight: 500; color: var(--text); min-width: 64px; }
.reel { margin: var(--space-8) auto 0; max-width: 960px; }
.reel picture { display: block; }
.reel img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; border-radius: var(--radius-card); border: 1px solid var(--border); box-shadow: 0 24px 60px rgba(13, 17, 23, 0.14); background: var(--bg-soft); }
.pit { margin: 0 0 var(--space-7, 40px); }
.pit picture { display: block; }
.pit img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; border-radius: var(--radius-card); border: 1px solid var(--border); }
.figure.shot figcaption { text-align: center; color: var(--text-2); font-size: 16px; }
.reel figcaption { margin-top: var(--space-3); text-align: center; color: var(--text-3); font-size: 14px; }

/* ---------- footer ---------- */
footer { border-top: 1px solid var(--divider); background: var(--bg-soft); padding: var(--space-8) 0 var(--space-6); color: var(--text-3); font-size: 14px; }
footer .cols { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: var(--space-6); }
footer h4 { margin: 0 0 var(--space-3); font: 500 14px/1.4 var(--font-sans); color: var(--text); }
footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
footer a { color: var(--text-3); }
footer a:hover { color: var(--text); }
footer .fine { margin-top: var(--space-7); padding-top: var(--space-5); border-top: 1px solid var(--divider); display: flex; flex-wrap: wrap; gap: var(--space-3) var(--space-5); justify-content: space-between; }

@media (max-width: 920px) {
  .grid.c3, .grid.c4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .doc { grid-template-columns: minmax(0, 1fr); }
  .toc { display: none; }
  footer .cols { grid-template-columns: 1fr 1fr; }
  .nav { display: none; position: absolute; left: 0; right: 0; top: 64px; flex-direction: column; margin: 0; padding: var(--space-3) 16px var(--space-4); background: var(--bg); border-bottom: 1px solid var(--divider); }
  .nav.open { display: flex; }
  .menu { display: inline-grid; place-items: center; }
}
@media (max-width: 620px) {
  .track .lane { grid-template-columns: 1fr; gap: 4px; }
  .track .n { text-align: left; }
  .track .cells i { height: 32px; font-size: 0; }
  .track .marks .who, .track .marks .n { display: none; }
  .track .marks .mark:not(.wide) { color: transparent; }
  .tl .ev { grid-template-columns: 1fr; gap: 4px; padding: 10px 12px; }
  .tl .when b { display: inline; margin-right: 8px; }
  section { padding: var(--space-8) 0; }
  .grid.c2, .grid.c3, .grid.c4 { grid-template-columns: minmax(0, 1fr); }
  .hero .wrap { padding-top: var(--space-8); }
  .card, .stat { padding: var(--space-5); }
  .steps > li { padding-left: var(--space-5); padding-top: 64px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .pill-rsi::after { animation: none; }
  .btn, a.card { transition: none; }
}

/* ---------- homepage vision / motion (light-first, no large dark fields) ---------- */
.fit-for { display: inline-flex; align-items: center; gap: 14px; margin-top: var(--space-5); padding: 8px 16px 8px 8px; border-radius: var(--radius-pill); background: var(--glass); box-shadow: var(--shadow-card); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); }
.fit-for .mark { width: 28px; height: 28px; }
.fit-for .word { height: 18px; width: auto; }
.fit-for .sep { width: 1px; height: 18px; background: var(--border); }
.fit-for .caption { font: 500 11px/1 var(--font-sans); letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-3); }

.hero-field { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.hero-field .grid { position: absolute; inset: -20%; background-image: linear-gradient(rgba(77,107,254,0.07) 1px, transparent 1px), linear-gradient(90deg, rgba(77,107,254,0.07) 1px, transparent 1px); background-size: 56px 56px; mask-image: radial-gradient(ellipse at 50% 28%, #000 18%, transparent 72%); -webkit-mask-image: radial-gradient(ellipse at 50% 28%, #000 18%, transparent 72%); animation: grid-drift 28s linear infinite; }
.hero-field .ring { position: absolute; width: min(720px, 92vw); height: min(720px, 92vw); left: 50%; top: 8%; translate: -50% -12%; border-radius: 50%; border: 1.5px dashed color-mix(in srgb, var(--brand) 35%, transparent); box-shadow: 0 0 0 18px color-mix(in srgb, var(--brand) 5%, transparent); animation: orbit 36s linear infinite; }
.hero-field .ring::after { content: ""; position: absolute; width: 14px; height: 14px; border-radius: 50%; background: var(--brand); top: 12%; left: 50%; translate: -50% 0; box-shadow: 0 0 0 8px color-mix(in srgb, var(--brand) 18%, transparent), 0 0 24px var(--brand); }

@keyframes grid-drift { to { transform: translateY(-56px); } }
@keyframes orbit { to { transform: rotate(360deg); } }
@keyframes rise { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }

[data-reveal] { opacity: 0; transform: translateY(18px); }
[data-reveal].in { animation: rise .7s cubic-bezier(.2,.7,.2,1) both; }
[data-reveal].d2.in { animation-delay: .08s; }
[data-reveal].d3.in { animation-delay: .16s; }
[data-reveal].d4.in { animation-delay: .24s; }

.flow { --cols: 4; list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(var(--cols), minmax(0, 1fr)); gap: var(--space-5); position: relative; }
.flow::before { content: ""; position: absolute; left: 8%; right: 8%; top: 28px; height: 2px; background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--brand) 55%, transparent), transparent); pointer-events: none; }
.flow > li { position: relative; padding: var(--space-6) var(--space-5) var(--space-5); border-radius: var(--radius-card); background: var(--bg); box-shadow: var(--shadow-card); }
.flow .n { width: 56px; height: 56px; margin: 0 auto var(--space-4); display: grid; place-items: center; border-radius: 50%; background: var(--brand); color: #fff; font: 600 16px/1 var(--font-mono); box-shadow: 0 0 0 8px var(--bg), 0 0 0 10px color-mix(in srgb, var(--brand) 25%, transparent); position: relative; z-index: 1; }
.flow h3 { text-align: center; }
.flow p { margin: var(--space-3) 0 0; color: var(--text-3); text-align: center; }

.case { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-5); }
.case-pane { border-radius: var(--radius-card); padding: var(--space-6); box-shadow: var(--shadow-card); background: var(--bg); min-width: 0; }
.case-pane .eyebrow { font: 500 12px/1 var(--font-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--text-3); }
.case-pane.before .eyebrow { color: var(--text-3); }
.case-pane.after { outline: 1px solid color-mix(in srgb, var(--brand) 35%, transparent); background: linear-gradient(180deg, color-mix(in srgb, var(--brand) 6%, #fff), var(--bg) 42%); }
.case-pane.after .eyebrow { color: var(--brand); }
.case-pane pre { margin: var(--space-4) 0; }
.case-pane p { margin: 0; color: var(--text-2); }
.case-note { margin: var(--space-5) 0 0; color: var(--text-3); font-size: 14px; text-align: center; }

.proof { display: grid; grid-template-columns: 1.15fr .85fr; gap: var(--space-5); }
.proof-hero, .proof-side { border-radius: var(--radius-card); padding: var(--space-7) var(--space-6); background: var(--bg); box-shadow: var(--shadow-card); }
.proof-hero { background: linear-gradient(165deg, color-mix(in srgb, var(--brand) 10%, #fff), var(--bg) 58%); }
.proof .value { font: 600 clamp(36px, 5vw, 64px)/1.05 var(--font-display); letter-spacing: -0.04em; color: var(--text); }
.proof .value em { font-style: normal; color: var(--brand); }
.proof p { margin: var(--space-4) 0 0; color: var(--text-2); }
.proof-meta { margin-top: var(--space-5); color: var(--text-3); font-size: 15px; text-wrap: pretty; }
.ids { margin-top: var(--space-4); font: 13px/1.7 var(--font-mono); color: var(--text-3); overflow-wrap: anywhere; }

.vision { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-5); }
.vision .card .badge { display: inline-flex; padding: 3px 10px; border-radius: var(--radius-pill); font: 500 12px/1.6 var(--font-mono); letter-spacing: 0.04em; background: var(--surface-strong); color: var(--text-3); }
.vision .card .badge.now { background: var(--brand-soft); color: var(--brand); }

.closer { position: relative; overflow: hidden; padding: var(--space-10) 0; background: linear-gradient(180deg, var(--bg) 0%, color-mix(in srgb, var(--brand) 8%, #fff) 50%, var(--bg) 100%); text-align: center; }
.closer h2 { font-size: clamp(32px, 5vw, 64px); line-height: 1.12; font-weight: 600; text-wrap: balance; }
.closer .lede { margin-top: var(--space-5); }
.closer .endline { margin: var(--space-6) auto 0; max-width: 900px; font: 600 clamp(22px, 3vw, 36px)/1.25 var(--font-display); letter-spacing: -0.02em; color: var(--brand); text-wrap: balance; }

footer .adapted { display: flex; align-items: center; gap: 10px; margin-top: var(--space-4); color: var(--text-3); font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase; }
footer .adapted img { height: 18px; width: auto; }

@media (max-width: 920px) {
  .flow { --cols: 2; }
  .flow::before { display: none; }
  .case, .proof, .vision { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  .flow { --cols: 1; }
  .proof .value { font-size: clamp(28px, 10vw, 44px); }
}
@media (prefers-reduced-motion: reduce) {
  .hero-field .grid, .hero-field .ring { animation: none; }
  [data-reveal] { opacity: 1; transform: none; animation: none; }
}