/* ==========================================================================
   METALCORE GLOBAL — site stylesheet
   Direction: dark technical / signal-gradient (企-I AI company template family)
   Contract: single stylesheet, no build step, no external JS framework.
   ========================================================================== */

/* ---------- 0. Self-hosted fonts (no third-party requests) ----------
   Latin subset only. Source: Google Fonts — the same files the previous
   remote font stylesheet resolved to; total payload 100 KB. font-display:
   swap keeps first paint text-visible on the system fallback stack. */

@font-face {
  font-family: "Space Grotesk";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("../fonts/space-grotesk-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193,
    U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Space Grotesk";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("../fonts/space-grotesk-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193,
    U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Space Grotesk";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("../fonts/space-grotesk-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193,
    U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/inter-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193,
    U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("../fonts/inter-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193,
    U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("../fonts/inter-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193,
    U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/ibm-plex-mono-400-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193,
    U+2212, U+2215, U+FEFF, U+FFFD;
}
@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("../fonts/ibm-plex-mono-500-latin.woff2") format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA,
    U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193,
    U+2212, U+2215, U+FEFF, U+FFFD;
}

/* ---------- 1. Tokens ---------- */
:root {
  --bg: #060910;
  --bg-soft: #0b1220;
  --surface: #121e33;
  --surface-2: #111a2b;
  --surface-3: #16233b;

  --ink: #dde5f2;
  --heading: #f4f8ff;
  --muted: #93a1b8;
  --muted-2: #6b7a92;
  /* Text-only meta role (module index, duration, hints, row descriptions).
     5.77:1 on --surface, 6.89:1 on --bg. --muted-2 is reserved for
     non-text marks (dots, hairlines, rules). */
  --meta: #8a99b0;

  --accent: #4f7cff;
  --accent-2: #22d3ee;
  --accent-soft: rgba(79, 124, 255, 0.14);
  /* Primary-button gradient only. White text: 5.06:1 / 6.95:1. */
  --accent-strong: #3d63e8;
  --accent-strong-2: #2c4fc4;

  --line: rgba(148, 168, 200, 0.16);
  /* Interactive/form boundaries. 3.23:1 on the card surface, 3.11:1 on the
     field's own fill (rgba(255,255,255,.03) over --surface) — WCAG 1.4.11.
     0.55 measured 3.04/2.94, i.e. under 3:1 on the inner edge. */
  --line-strong: rgba(148, 168, 200, 0.58);
  /* Card outline (non-control): 2.32:1 on --surface, 2.29:1 on --bg. */
  --line-card: rgba(148, 168, 200, 0.42);

  --danger: #ff6b6b;
  --success: #34d399;

  --radius: 14px;
  --radius-sm: 10px;

  --font-display: "Space Grotesk", "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-sans: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", "PingFang SC", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --bg-footer: #04070d;
  --logo-bg: #4f7cff;
  --logo-accent: #060910;

  --header-h: 72px;
  --maxw: 1140px;
}

/* ---------- 2. Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, h4 {
  margin: 0 0 0.5em;
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--heading);
  text-wrap: balance;
}
h1 { font-size: clamp(2.35rem, 5.6vw, 4.05rem); }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); }
h3 { font-size: clamp(1.05rem, 1.6vw, 1.28rem); letter-spacing: -0.01em; }

p { margin: 0 0 1rem; }
a { color: var(--accent-2); text-decoration: none; transition: color 0.18s ease; }
a:hover { color: #7de9ff; }
img, svg { display: block; max-width: 100%; }
ul, ol { margin: 0 0 1rem; padding-left: 1.15rem; }
li { margin-bottom: 0.4rem; }
button, input, select, textarea { font: inherit; }

:focus-visible { outline: 2px solid var(--accent-2); outline-offset: 3px; border-radius: 4px; }
::selection { background: rgba(79, 124, 255, 0.35); color: #fff; }

h1 em, h2 em {
  font-style: normal;
  background: linear-gradient(100deg, var(--accent-2), var(--accent) 70%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

/* ---------- 3. Layout helpers ---------- */
.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: 22px; }

.section { padding: 96px 0; position: relative; }
.section--soft { background: var(--bg-soft); border-block: 1px solid var(--line); }
.section--tight { padding: 64px 0; }

.section-head { max-width: 46em; margin: 0 0 48px; }
.section-head--wide { max-width: none; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--font-mono);
  font-size: 0.74rem; font-weight: 500;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--accent-2);
  margin: 0 0 16px;
}
.eyebrow::before {
  content: ""; width: 22px; height: 1px;
  background: linear-gradient(90deg, var(--accent-2), transparent);
}
.eyebrow--plain::before { display: none; }

.lede { font-size: 1.08rem; color: var(--muted); max-width: 44em; }
.text-muted { color: var(--muted); }
.mono { font-family: var(--font-mono); font-size: 0.85em; letter-spacing: 0.02em; }

.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;
}

.skip-link {
  position: absolute; left: 16px; top: -60px; z-index: 200;
  background: var(--accent-strong); color: #fff; padding: 10px 18px;
  border-radius: 0 0 10px 10px; font-weight: 600;
  transition: top 0.18s ease;
}
.skip-link:focus { top: 0; color: #fff; }

/* ---------- 4. Buttons ---------- */
.button {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 13px 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: var(--font-sans);
  font-weight: 600; font-size: 0.95rem; line-height: 1;
  cursor: pointer; text-align: center;
  transition: transform 0.15s ease, background-color 0.18s ease,
    border-color 0.18s ease, box-shadow 0.18s ease, color 0.18s ease;
}
.button:active { transform: translateY(1px); }
.button .arrow { font-size: 1.02em; line-height: 1; }

.button--primary {
  background: linear-gradient(100deg, var(--accent-strong), var(--accent-strong-2));
  color: #fff;
  box-shadow: 0 8px 24px rgba(79, 124, 255, 0.34);
}
.button--primary:hover {
  color: #fff;
  box-shadow: 0 10px 30px rgba(79, 124, 255, 0.46);
  transform: translateY(-1px);
}

.button--secondary {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--line-strong);
  color: var(--heading);
}
.button--secondary:hover { border-color: var(--accent-2); color: #fff; background: rgba(34, 211, 238, 0.08); }

/* padding-block lifts the ghost button from 43.1px to 45.2px (target ≥44px). */
.button--ghost {
  background: transparent; color: var(--accent-2);
  padding-inline: 4px; padding-block: 14px; border-radius: 0;
}
.button--ghost:hover { color: #fff; }

.button--lg { padding: 16px 30px; font-size: 1.02rem; }
.button--block { width: 100%; }

/* ---------- 5. Header / nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(6, 9, 16, 0.82);
  backdrop-filter: saturate(150%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.site-header__inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px; height: var(--header-h);
}

.brand {
  display: inline-flex; align-items: center; gap: 11px;
  font-family: var(--font-display);
  font-weight: 700; font-size: 0.94rem; letter-spacing: 0.01em;
  color: var(--heading); min-width: 0;
}
.brand:hover { color: #fff; }
.brand__mark { width: 32px; height: 32px; flex: 0 0 auto; }
.brand__text { display: flex; flex-direction: column; line-height: 1.15; }
.brand__text small {
  font-family: var(--font-mono); font-size: 0.6rem; font-weight: 400;
  letter-spacing: 0.22em; color: var(--meta); text-transform: uppercase;
}

.site-nav { display: flex; align-items: center; gap: 2px; }
.site-nav__link {
  display: block; padding: 9px 13px; border-radius: 999px;
  color: var(--muted); font-weight: 500; font-size: 0.93rem; white-space: nowrap;
  transition: color 0.15s ease, background-color 0.15s ease;
}
.site-nav__link:hover { color: var(--heading); background: rgba(255, 255, 255, 0.05); }
.site-nav__link[aria-current="page"] { color: var(--heading); background: var(--accent-soft); }

/* 14px block padding → 44.4px tall, meets the 44px tap-target floor. */
.nav-cta { margin-left: 10px; padding: 14px 18px; font-size: 0.9rem; }
.header-actions { display: flex; align-items: center; gap: 8px; }

.nav-toggle {
  display: none; width: 44px; height: 44px;
  align-items: center; justify-content: center;
  border: 1px solid var(--line-strong); border-radius: 10px;
  background: transparent; cursor: pointer; color: var(--heading);
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  display: block; width: 19px; height: 2px; background: currentColor;
  border-radius: 2px; position: relative;
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.nav-toggle span::before, .nav-toggle span::after { content: ""; position: absolute; left: 0; }
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }
.nav-toggle[aria-expanded="true"] span { background: transparent; }
.nav-toggle[aria-expanded="true"] span::before { transform: translateY(6px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span::after { transform: translateY(-6px) rotate(-45deg); }

/* ---------- 6. Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  padding: 92px 0 88px;
  background:
    radial-gradient(900px 520px at 78% -14%, rgba(79, 124, 255, 0.22), transparent 62%),
    radial-gradient(700px 460px at 6% 112%, rgba(34, 211, 238, 0.12), transparent 58%),
    var(--bg);
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(148, 168, 200, 0.055) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(148, 168, 200, 0.055) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 25%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 50% 30%, #000 25%, transparent 78%);
  pointer-events: none;
}
.hero > .container { position: relative; z-index: 1; }

.hero__grid { display: grid; grid-template-columns: 1fr; gap: 52px; align-items: center; }
.hero__content { min-width: 0; }
.hero h1 { margin-bottom: 0.45em; }
.hero__lede { font-size: 1.1rem; color: var(--muted); max-width: 34em; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 13px; margin-top: 30px; }

.hero__meta {
  display: flex; flex-wrap: wrap; gap: 10px 22px;
  margin-top: 32px; padding-top: 26px;
  border-top: 1px solid var(--line);
  font-size: 0.86rem; color: var(--meta);
}
.hero__meta span { display: inline-flex; align-items: center; gap: 8px; }
.hero__meta svg { color: var(--accent-2); flex: 0 0 auto; }

/* Agent graph figure */
.hero__visual { position: relative; }
.graph-card {
  position: relative;
  background: linear-gradient(165deg, var(--surface-2), var(--surface-3));
  border: 1px solid var(--line-card);
  border-radius: 18px;
  padding: 18px;
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.55);
}
.graph-card__bar {
  display: flex; align-items: center; gap: 8px;
  padding-bottom: 14px; margin-bottom: 8px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono); font-size: 0.7rem; color: var(--meta);
  letter-spacing: 0.08em; text-transform: uppercase;
}
/* Hollow grey dot, no status colour. This figure is a static example, so it
   must not imply that anything is running. */
.graph-card__dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: transparent;
  border: 1.5px solid var(--muted-2);
  flex: 0 0 auto;
}
.graph-card__bar span:last-child { margin-left: auto; }

.graph-card__figure { padding: 8px 0 4px; }
/* Canvas keeps the SVG's 360:210 ratio, so the HTML labels below can be
   positioned in % of the canvas and stay glued to their nodes at every width.
   --fig-max-h caps the rendered height (240px desktop / 168px small screens)
   without letterboxing the artwork. */
.graph-card__canvas {
  position: relative;
  width: 100%;
  max-width: calc(var(--fig-max-h, 640px) * 12 / 7);
  aspect-ratio: 360 / 210;
  margin-inline: auto;
}
.graph-card__canvas svg { width: 100%; height: 100%; }

.graph-node-label {
  position: absolute;
  left: var(--x);
  top: var(--y);
  transform: translate(-50%, -50%);
  font: 500 0.75rem/1 var(--font-mono);
  color: var(--heading);
  background: rgba(13, 20, 33, 0.92);
  border: 1px solid var(--line-card);
  border-radius: 6px;
  padding: 3px 7px;
  white-space: nowrap;
  pointer-events: none;
}
.graph-card__rows { display: grid; gap: 6px; margin-top: 8px; }
.graph-row {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: 9px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line);
  font-size: 0.78rem; color: var(--muted);
}
.graph-row strong { color: var(--heading); font-weight: 600; }
.graph-row strong { flex: 0 0 auto; }
.graph-row__desc {
  flex: 1 1 auto; min-width: 0; margin-left: 2px;
  color: var(--meta);
}
.graph-row__meta {
  flex: 0 0 auto;
  font-family: var(--font-mono); font-size: 0.68rem;
  letter-spacing: 0.04em; color: var(--meta);
}
.graph-row .tag {
  margin-left: auto; flex: 0 0 auto;
  font-family: var(--font-mono); font-size: 0.66rem;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--accent-2);
}
.graph-card__note {
  margin: 10px 2px 0;
  font-size: 0.72rem;
  color: var(--meta);
  letter-spacing: 0.01em;
}

/* ---------- 7. Cards & grids ---------- */
.grid { display: grid; grid-template-columns: 1fr; gap: 18px; }
.grid--2 { grid-template-columns: 1fr; }
.grid--3 { grid-template-columns: 1fr; }

.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line-card);
  border-radius: var(--radius);
  padding: 26px 24px;
  transition: transform 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}
.card::after {
  content: ""; position: absolute; inset: 0 auto auto 0;
  width: 100%; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(79, 124, 255, 0.55), transparent);
  opacity: 0; transition: opacity 0.2s ease;
  border-radius: var(--radius) var(--radius) 0 0;
}
.card:hover { transform: translateY(-3px); border-color: var(--line-strong); background: var(--surface-3); }
.card:hover::after { opacity: 1; }
.card h3 { margin-bottom: 0.45em; }
.card p { color: var(--muted); font-size: 0.95rem; }
.card p:last-child { margin-bottom: 0; }
.card__index {
  font-family: var(--font-mono); font-size: 0.72rem;
  letter-spacing: 0.14em; color: var(--meta); margin-bottom: 14px;
}

.icon-badge {
  display: inline-grid; place-items: center;
  width: 46px; height: 46px; border-radius: 12px;
  background: linear-gradient(150deg, rgba(79, 124, 255, 0.22), rgba(34, 211, 238, 0.1));
  border: 1px solid rgba(79, 124, 255, 0.32);
  color: var(--accent-2);
  margin-bottom: 16px;
}

/* ---------- 8. List blocks ---------- */
.check-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 16px; }
.check-list li { display: flex; gap: 13px; align-items: flex-start; margin: 0; }
.check-list .check { flex: 0 0 auto; margin-top: 3px; color: var(--accent-2); }
.check-list strong { display: block; color: var(--heading); margin-bottom: 2px; font-weight: 600; }
.check-list span:not(.check) { color: var(--muted); font-size: 0.94rem; }

.detail-list { list-style: none; padding: 0; margin: 14px 0 0; display: grid; gap: 8px; }
.detail-list li {
  position: relative; padding-left: 18px;
  color: var(--muted); font-size: 0.92rem; margin: 0;
}
.detail-list li::before {
  content: ""; position: absolute; left: 0; top: 0.62em;
  width: 6px; height: 6px; border-radius: 2px;
  background: var(--accent); opacity: 0.8;
}

/* ---------- 9. Panel (highlight box) ---------- */
.why-wrap { display: grid; grid-template-columns: 1fr; gap: 44px; align-items: start; }

.panel {
  background:
    radial-gradient(600px 280px at 100% 0%, rgba(79, 124, 255, 0.18), transparent 60%),
    linear-gradient(165deg, var(--surface-2), var(--surface-3));
  border: 1px solid var(--line-card);
  border-radius: var(--radius);
  padding: 34px 28px;
}
.panel h3 { font-size: clamp(1.25rem, 2.2vw, 1.6rem); }
.panel > p { color: var(--muted); }

.panel__steps { margin: 24px 0 0; display: grid; gap: 12px; }
.panel__step {
  display: flex; gap: 13px; align-items: flex-start;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line);
  border-radius: 10px; padding: 13px 15px;
}
.panel__num {
  flex: 0 0 auto; width: 26px; height: 26px; border-radius: 8px;
  display: grid; place-items: center;
  background: rgba(79, 124, 255, 0.16); color: var(--accent-2);
  font-family: var(--font-mono); font-size: 0.76rem;
}
.panel__step strong { display: block; color: var(--heading); font-size: 0.92rem; }
.panel__step small { color: var(--muted); font-size: 0.82rem; line-height: 1.55; display: block; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.chip {
  display: inline-block; padding: 6px 12px; border-radius: 999px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line);
  font-family: var(--font-mono); font-size: 0.73rem; color: var(--ink);
  letter-spacing: 0.02em;
}

/* ---------- 10. Process timeline ---------- */
.process { display: grid; grid-template-columns: 1fr; gap: 0; }
.process__step {
  position: relative;
  padding: 0 0 34px 54px;
  border-left: 1px solid var(--line-strong);
}
.process__step:last-child { padding-bottom: 0; border-left-color: transparent; }
.process__num {
  position: absolute; left: -19px; top: -3px;
  width: 38px; height: 38px; border-radius: 50%;
  display: grid; place-items: center;
  background: var(--bg); border: 1px solid rgba(79, 124, 255, 0.5);
  color: var(--accent-2);
  font-family: var(--font-mono); font-size: 0.8rem;
}
.process__step h3 { margin-bottom: 0.25em; }
.process__step p { color: var(--muted); margin: 0; font-size: 0.95rem; max-width: 38em; }
.process__step .duration {
  display: inline-block; margin-top: 8px;
  font-family: var(--font-mono); font-size: 0.72rem;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--meta);
}

/* ---------- 11. Stats / rule strip ---------- */
.strip {
  display: grid; grid-template-columns: 1fr; gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.strip__item { background: var(--surface); padding: 22px 20px; }
.strip__item strong {
  display: block; font-family: var(--font-display); font-size: 1rem;
  color: var(--heading); margin-bottom: 4px;
}
.strip__item span { font-size: 0.86rem; color: var(--muted); }

/* ---------- 11b. Entity bar (verifiable company facts) ---------- */
.section--entity { padding: 40px 0; }

.entity-bar {
  display: grid; grid-template-columns: 1fr; gap: 1px;
  background: var(--line);
  border: 1px solid var(--line-card);
  border-radius: var(--radius);
  overflow: hidden;
}
.entity-bar__cell { background: var(--surface); padding: 18px 20px; }
.entity-bar__label {
  display: block; margin-bottom: 6px;
  font-family: var(--font-mono); font-size: 0.66rem;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--meta);
}
.entity-bar__value {
  display: block;
  font-size: 0.9rem; line-height: 1.5; color: var(--ink);
}
.entity-bar__value a {
  color: var(--accent-2);
  text-decoration: underline;
  text-underline-offset: 2px;
  display: inline-block;
  padding-block: 6px;
}
.entity-bar__value a:hover { color: #7de9ff; }
.entity-bar--inquiry { margin-top: 40px; }

/* ---------- 12. Contact / form ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr; gap: 32px; }

.contact-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
}
.contact-item {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 16px 0; border-bottom: 1px solid var(--line);
}
.contact-item:first-of-type { padding-top: 4px; }
.contact-item:last-child { border-bottom: 0; padding-bottom: 0; }
.contact-card__title {
  font-size: 1.1rem; margin: 0 0 16px; line-height: 1.3; letter-spacing: -0.01em;
}
.contact-item .icon-badge { width: 38px; height: 38px; margin: 0; border-radius: 10px; }
.contact-item h3 { font-size: 0.95rem; margin: 0 0 3px; }
.contact-item p { margin: 0; color: var(--muted); font-size: 0.92rem; line-height: 1.6; }
.contact-item a { color: var(--ink); }
.contact-item a:hover { color: var(--accent-2); }

.form-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
}
.form-card > h2 { font-size: 1.35rem; margin-bottom: 0.3em; }
.form-card > p.form-intro { color: var(--muted); font-size: 0.94rem; margin-bottom: 24px; }

.form-grid { display: grid; grid-template-columns: 1fr; gap: 16px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field--full { grid-column: 1 / -1; }
.field label { font-weight: 600; font-size: 0.86rem; color: var(--heading); }
.field label b { color: var(--danger); font-weight: 600; }
.field .hint { font-size: 0.78rem; color: var(--meta); }
.field input, .field textarea, .field select {
  width: 100%; padding: 11px 13px;
  border: 1px solid var(--line-strong); border-radius: var(--radius-sm);
  font-family: inherit; font-size: 0.95rem; color: var(--ink);
  background: rgba(255, 255, 255, 0.03);
  transition: border-color 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}
.field select {
  appearance: none;
  -webkit-appearance: none;
  padding-right: 38px;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5 6 6.5l5-5' fill='none' stroke='%2393a1b8' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
}
.field select option { background: var(--surface); color: var(--ink); }
.field textarea { resize: vertical; min-height: 120px; }
.field input::placeholder, .field textarea::placeholder { color: var(--meta); opacity: 1; }
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 124, 255, 0.2);
  background: rgba(79, 124, 255, 0.05);
}
.field input[aria-invalid="true"], .field textarea[aria-invalid="true"], .field select[aria-invalid="true"] {
  border-color: var(--danger);
}
.field .error-msg { display: none; font-size: 0.8rem; color: var(--danger); }
.field.has-error .error-msg { display: block; }

.form-status {
  display: none; margin-top: 18px; padding: 13px 16px;
  border-radius: var(--radius-sm); font-size: 0.92rem;
}
.form-status--success { display: block; background: rgba(52, 211, 153, 0.12); color: #6ee7b7; border: 1px solid rgba(52, 211, 153, 0.35); }
.form-status--error { display: block; background: rgba(255, 107, 107, 0.1); color: #ffa8a8; border: 1px solid rgba(255, 107, 107, 0.35); }
.form-note { margin-top: 16px; font-size: 0.82rem; color: var(--meta); }
.form-submit { margin-top: 22px; }

/* ---------- 13. Interior page hero ---------- */
.page-hero {
  position: relative; overflow: hidden;
  padding: 72px 0 64px;
  background:
    radial-gradient(760px 380px at 88% -30%, rgba(79, 124, 255, 0.2), transparent 62%),
    linear-gradient(180deg, var(--bg-soft), var(--bg));
  border-bottom: 1px solid var(--line);
}
.page-hero h1 { max-width: 22em; }
.page-hero p { color: var(--muted); max-width: 42em; font-size: 1.08rem; margin-bottom: 0; }

.breadcrumb {
  display: flex; gap: 8px; align-items: center;
  font-family: var(--font-mono); font-size: 0.74rem;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--meta); margin-bottom: 18px;
}
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--accent-2); }
.breadcrumb span[aria-hidden] { opacity: 0.5; }

/* ---------- 14. Notice ---------- */
.notice {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--line);
  border-left: 2px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 16px 20px; margin-top: 36px;
  font-size: 0.9rem; color: var(--muted);
}
.notice p { margin: 0; }
.notice p + p { margin-top: 0.6em; }
/* Declaration block that has to stay inside the first screen. */
.notice--declaration { margin: 22px 0 0; max-width: 48em; line-height: 1.6; }
.notice small { display: block; margin-top: 5px; color: var(--meta); font-size: 0.8rem; }

/* ---------- 15. Legal prose ---------- */
.prose { max-width: 740px; margin-inline: auto; }
.prose h2 { font-size: 1.3rem; margin-top: 2.3em; }
.prose h3 { font-size: 1.05rem; margin-top: 1.8em; }
.prose p, .prose li { color: var(--ink); font-size: 0.96rem; }
.prose a { text-decoration: underline; }
.prose .updated { font-family: var(--font-mono); font-size: 0.78rem; color: var(--meta); }

/* ---------- 16. CTA band ---------- */
.cta-band {
  position: relative; overflow: hidden;
  background:
    radial-gradient(700px 320px at 50% 130%, rgba(34, 211, 238, 0.14), transparent 65%),
    linear-gradient(180deg, var(--surface), var(--bg-soft));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.cta-band__inner { text-align: center; max-width: 52em; margin-inline: auto; }
.cta-band h2 { margin-bottom: 0.4em; }
.cta-band p { color: var(--muted); margin-inline: auto; max-width: 40em; }
.cta-band .hero__cta { justify-content: center; }
.cta-band__phone { margin-top: 16px; font-family: var(--font-mono); font-size: 0.82rem; letter-spacing: 0.02em; }
.cta-band__phone a { color: var(--meta); }
.cta-band__phone a:hover { color: var(--accent-2); }

/* ---------- 17. Footer ---------- */
.site-footer {
  background: var(--bg-footer);
  color: var(--muted);
  padding: 72px 0 0;
  border-top: 1px solid var(--line);
  font-size: 0.92rem;
}
.site-footer a { color: var(--ink); }
.site-footer a:hover { color: var(--accent-2); }

.site-footer__grid { display: grid; grid-template-columns: 1fr; gap: 34px; padding-bottom: 48px; }
.site-footer__brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-display); font-size: 1rem; font-weight: 700; color: var(--heading);
}
.site-footer__brand:hover { color: var(--heading); }
.site-footer__brand svg { width: 30px; height: 30px; }
.site-footer__grid > div > p { margin-top: 14px; font-size: 0.88rem; max-width: 28em; color: var(--meta); }

/* Column headings are h3: the footer must not skip from the page's h2 to h4. */
.site-footer h3 {
  color: var(--heading); font-family: var(--font-sans);
  font-size: 0.76rem; letter-spacing: 0.14em; text-transform: uppercase;
  font-weight: 600; margin: 0 0 14px; line-height: 1.4;
}
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer ul li { margin-bottom: 4px; }
/* 5px block padding lifts footer links past the 24x24px target (WCAG 2.2 · 2.5.8). */
.site-footer ul li a { display: inline-block; padding-block: 5px; }
.site-footer address { font-style: normal; line-height: 1.75; font-size: 0.88rem; color: var(--meta); }
.site-footer address a { display: inline-block; padding-block: 5px; }
.site-footer__hours { margin: 8px 0 0; font-family: var(--font-mono); font-size: 0.76rem; color: var(--meta); line-height: 1.6; }
.site-footer__plain { margin: 0; font-size: 0.86rem; color: var(--meta); line-height: 1.6; text-wrap: pretty; }
.site-footer__cta {
  display: inline-block; padding-block: 5px;
  color: var(--accent-2); font-weight: 500;
}
.site-footer__bottom-note { color: var(--meta); }

.footer-proof {
  margin: 0 0 28px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 0.82rem;
  color: var(--meta);
  max-width: 68em;
  line-height: 1.65;
}

.site-footer__bottom {
  border-top: 1px solid var(--line);
  padding: 24px 0 28px;
  display: flex; flex-direction: column; gap: 10px;
  align-items: flex-start; justify-content: space-between;
  font-size: 0.8rem; color: var(--meta);
}
.site-footer__legal { display: flex; flex-wrap: wrap; gap: 18px; }

/* ---------- 18. Reference designs, FAQ, profile blocks ---------- */

/* Example badge — every illustrative block on the site carries one. */
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; border-radius: 999px;
  font-family: var(--font-mono); font-size: 0.66rem;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line-card);
}
.badge--example {
  color: var(--accent-2);
  background: rgba(34, 211, 238, 0.09);
  border-color: rgba(34, 211, 238, 0.4);
}
.badge--example::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent-2);
}

.ref-design { padding: 44px 0; border-top: 1px solid var(--line); }
.ref-design:first-of-type { border-top: 0; padding-top: 0; }
.ref-design__meta { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 14px; }
.ref-design h2 { margin-bottom: 0.35em; max-width: 26em; }

.ref-design__grid { display: grid; grid-template-columns: 1fr; gap: 26px; margin-top: 24px; }
.ref-design__label {
  font-family: var(--font-mono); font-size: 0.68rem; font-weight: 500;
  letter-spacing: 0.13em; text-transform: uppercase;
  color: var(--meta); margin: 0 0 8px;
}
.ref-design__block p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.ref-design__block p + p { margin-top: 0.8em; }

/* Lists of deliverables / measurements inside a design. */
.spec-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 7px; }
.spec-list li {
  position: relative; margin: 0; padding-left: 16px;
  color: var(--muted); font-size: 0.92rem; line-height: 1.6;
}
.spec-list li::before {
  content: ""; position: absolute; left: 0; top: 0.62em;
  width: 5px; height: 5px; border-radius: 1px;
  background: var(--accent-2); opacity: 0.85;
}

/* Bold-lead list: "what every engagement produces" / "what we need from you". */
.lead-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 16px; }
.lead-list li {
  margin: 0; padding-left: 16px;
  border-left: 2px solid var(--line-strong);
  color: var(--muted); font-size: 0.95rem; line-height: 1.65;
}
.lead-list strong { display: block; color: var(--heading); font-weight: 600; margin-bottom: 2px; }

/* /about profile blocks */
.profile-block { margin-top: 44px; }
.profile-block > h3 {
  font-size: 0.76rem; font-family: var(--font-sans);
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--heading); margin-bottom: 14px;
}

/* FAQ (details/summary) */
.faq { display: grid; gap: 10px; max-width: 54em; }
.faq__item {
  background: var(--surface);
  border: 1px solid var(--line-card);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.faq__item summary {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 16px 20px; cursor: pointer; list-style: none;
  font-family: var(--font-display); font-weight: 600; font-size: 1rem;
  color: var(--heading); line-height: 1.4;
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::after {
  content: "+"; margin-left: auto; flex: 0 0 auto;
  font-family: var(--font-mono); font-size: 1.05rem; line-height: 1;
  color: var(--accent-2);
}
.faq__item[open] summary::after { content: "\2212"; }
.faq__item summary:hover { background: rgba(255, 255, 255, 0.03); }
.faq__a { padding: 0 20px 18px; }
.faq__a p { color: var(--muted); font-size: 0.95rem; margin: 0 0 12px; }
.faq__short {
  color: var(--ink) !important;
  border-left: 2px solid var(--accent-2);
  padding-left: 12px;
  margin-bottom: 14px !important;
}
.faq__more {
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.06em;
  color: var(--meta);
}
.faq__more a { color: var(--accent-2); }

/* /about — three profile axes, shared traits, fit lists */
.axis-grid { display: grid; grid-template-columns: 1fr; gap: 22px; }
.axis { background: var(--surface); border: 1px solid var(--line-card); border-radius: var(--radius); padding: 24px 22px; }
.axis h3 { font-size: 0.95rem; margin-bottom: 14px; }
.axis ul { margin: 0; }
.axis li { color: var(--muted); font-size: 0.92rem; line-height: 1.6; }
.axis li strong { color: var(--heading); }

.fit-grid { display: grid; grid-template-columns: 1fr; gap: 20px; }
.fit-col { border-radius: var(--radius); padding: 22px 20px; border: 1px solid var(--line-card); background: var(--surface); }
.fit-col--no { background: transparent; border-style: dashed; }
.fit-col h3 { font-size: 0.95rem; margin-bottom: 12px; }
.fit-col h3::before {
  content: ""; display: inline-block; width: 14px; height: 2px;
  vertical-align: middle; margin-right: 9px; background: var(--accent-2);
}
.fit-col--no h3::before { background: var(--muted-2); }
.fit-col ul { margin: 0; padding-left: 1.1rem; }
.fit-col li { color: var(--muted); font-size: 0.92rem; line-height: 1.6; margin-bottom: 10px; }
.fit-col li:last-child { margin-bottom: 0; }

/* /contact — optional fields disclosure + fallback block */
.optional-fields { grid-column: 1 / -1; border: 1px solid var(--line-card); border-radius: var(--radius-sm); background: rgba(255, 255, 255, 0.02); }
.optional-fields > summary {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 16px; cursor: pointer; list-style: none;
  font-weight: 600; font-size: 0.9rem; color: var(--heading);
}
.optional-fields > summary::-webkit-details-marker { display: none; }
.optional-fields > summary::after {
  content: "+"; margin-left: auto; font-family: var(--font-mono); color: var(--accent-2);
}
.optional-fields[open] > summary::after { content: "\2212"; }
.optional-fields__body {
  display: grid; grid-template-columns: 1fr; gap: 16px;
  padding: 4px 16px 18px;
}
.optional-fields__hint { font-size: 0.82rem; color: var(--meta); margin: 0; line-height: 1.6; }

.form-degrade {
  margin-top: 24px; padding-top: 20px;
  border-top: 1px solid var(--line);
}
.form-degrade h3 { font-size: 0.95rem; margin-bottom: 8px; }
.form-degrade p { margin: 0; font-size: 0.9rem; color: var(--muted); line-height: 1.65; }
.form-degrade a { color: var(--accent-2); font-weight: 500; }

/* ---------- 19. Motion ---------- */
/* Hidden state only when JS is available, so no-JS visitors see everything. */
.reveal { transition: opacity 0.6s ease, transform 0.6s ease; }
.js .reveal { opacity: 0; transform: translateY(18px); }
.js .reveal.is-visible { opacity: 1; transform: none; }

.pulse { animation: pulse 3.2s ease-in-out infinite; transform-origin: center; }
.pulse--b { animation-delay: 0.9s; }
.pulse--c { animation-delay: 1.8s; }
@keyframes pulse {
  0%, 100% { opacity: 0.35; }
  50% { opacity: 1; }
}
.flow { stroke-dasharray: 6 10; animation: flow 6s linear infinite; }
@keyframes flow { to { stroke-dashoffset: -160; } }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal, .js .reveal { opacity: 1; transform: none; transition: none; }
  .pulse, .flow { animation: none; }
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
}

/* ---------- 20. Responsive ---------- */
@media (min-width: 640px) {
  .grid--2 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .form-grid { grid-template-columns: repeat(2, 1fr); }
  .strip { grid-template-columns: repeat(2, 1fr); }
  .entity-bar { grid-template-columns: repeat(2, 1fr); }
  .entity-bar__cell:last-child { grid-column: span 2; }
  .site-footer__grid { grid-template-columns: repeat(2, 1fr); gap: 36px 40px; }
  .fit-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .optional-fields__body { grid-template-columns: 1fr 1fr; }
  .optional-fields__hint { grid-column: 1 / -1; }
  .faq__item summary { padding: 18px 22px; }
}

@media (min-width: 900px) {
  .hero__grid { grid-template-columns: 1fr 1.02fr; gap: 52px; }
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .strip { grid-template-columns: repeat(4, 1fr); }
  .why-wrap { grid-template-columns: 1fr 1fr; gap: 56px; }
  .contact-grid { grid-template-columns: 0.85fr 1.15fr; gap: 40px; }
  .process { max-width: 760px; }
  .panel__steps { grid-template-columns: repeat(2, 1fr); }
  .site-footer__bottom { flex-direction: row; align-items: center; }
  .section-head--split { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: end; max-width: none; }
  .section-head--split > .lede { margin-bottom: 6px; }
  /* 900–1023 the card is narrow: let the row description wrap instead of clipping. */
  .graph-row__desc { white-space: normal; overflow: visible; text-overflow: clip; }
  .axis-grid { grid-template-columns: repeat(3, 1fr); }
  .lead-list--2 { grid-template-columns: 1fr 1fr; gap: 18px 32px; }
  .ref-design__grid { grid-template-columns: 1fr 1fr; gap: 30px 44px; }
  .ref-design__block--wide { grid-column: 1 / -1; }
  .ref-design__block--wide .spec-list { grid-template-columns: 1fr 1fr; gap: 8px 32px; }
  .ref-design { padding: 56px 0; }
}

/* Five footer columns need ~1000px before the service labels start breaking
   mid-phrase; below that the footer keeps two comfortable columns. */
@media (min-width: 1024px) {
  .site-footer__grid { grid-template-columns: 1.45fr 0.8fr 0.95fr 1.15fr 1.15fr; gap: 40px; }
}

@media (min-width: 1100px) {
  .entity-bar { grid-template-columns: repeat(5, 1fr); }
  .entity-bar__cell:last-child { grid-column: auto; }
}

/* feature rows on services page */
.feature-row { display: grid; grid-template-columns: 1fr; gap: 14px; padding: 30px 0; border-top: 1px solid var(--line); }
.feature-row:last-child { border-bottom: 1px solid var(--line); }
.feature-row h3 { margin: 0; display: flex; align-items: baseline; gap: 12px; }
.feature-row h3 .num { font-family: var(--font-mono); font-size: 0.72rem; color: var(--accent-2); letter-spacing: 0.1em; }
.feature-row p { color: var(--muted); margin: 0; font-size: 0.95rem; }
@media (min-width: 900px) {
  .feature-row { grid-template-columns: 0.9fr 1.25fr 1fr; gap: 36px; align-items: start; }
  .feature-row .detail-list { margin-top: 0; }
}

@media (max-width: 899px) {
  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: absolute; top: var(--header-h); left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 6px;
    background: var(--bg-soft);
    border-bottom: 1px solid var(--line);
    padding: 16px 22px 24px;
    box-shadow: 0 24px 50px rgba(0, 0, 0, 0.6);
    display: none;
  }
  .site-nav.nav-open { display: flex; }
  .site-nav__link { padding: 12px 14px; border-radius: 10px; }
  .nav-cta { margin-left: 0; width: 100%; margin-top: 6px; }

  /* Mobile / tablet hero: tighten so the graph card reaches the 390x844 fold. */
  .hero__grid { gap: 32px; }
  .hero__lede { font-size: 1rem; line-height: 1.65; }
  .hero__cta { margin-top: 24px; gap: 10px; }
  .graph-card { padding: 16px; --fig-max-h: 240px; }
  .graph-card__figure { padding: 4px 0 2px; }
  .graph-card__rows { gap: 4px; }
  .graph-row { padding: 7px 10px; font-size: 0.74rem; line-height: 1.35; }
}

@media (min-width: 521px) and (max-width: 899px) {
  .hero { padding: 52px 0; }
}

@media (max-width: 639px) {
  .hero__meta {
    margin-top: 20px; padding-top: 18px;
    gap: 8px 16px; font-size: 0.82rem;
  }
  /* Below 640 the canvas is ~288px wide: a fixed-size label pill would sit on
     top of its node, so the dots + the 5 data rows carry the figure instead. */
  .graph-node-label { display: none; }
}

@media (max-width: 520px) {
  .section { padding: 64px 0; }
  .section--entity { padding: 32px 0; }
  .hero { padding: 44px 0 48px; }
  .page-hero { padding: 52px 0 44px; }
  .brand__text small { display: none; }
  .graph-card { padding: 14px; --fig-max-h: 168px; }
  .card { padding: 22px 20px; }
  .form-card { padding: 24px 20px; }
  .entity-bar__cell { padding: 16px 18px; }
  /* Keeps the /scenarios declaration inside the 390x844 first screen. */
  .page-hero .eyebrow { font-size: 0.68rem; letter-spacing: 0.1em; }
  .notice--declaration { margin-top: 14px; }
}