/* GridCtl marketing site — v6.
   Direction: graphite & erasure — a designer's drafting paper. Warm off-white canvas,
   soft rounded surfaces, hairline dividers, one dark high-contrast button, generous
   spacing. Monochrome, but soft and premium rather than austere or brutalist. A single
   serif word inside otherwise-sans headlines acts as visual punctuation. */

@font-face { font-family: "Inter"; src: url("fonts/inter-400.woff2") format("woff2"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "Inter"; src: url("fonts/inter-500.woff2") format("woff2"); font-weight: 500; font-style: normal; font-display: swap; }
@font-face { font-family: "Inter"; src: url("fonts/inter-600.woff2") format("woff2"); font-weight: 600; font-style: normal; font-display: swap; }
@font-face { font-family: "Inter"; src: url("fonts/inter-700.woff2") format("woff2"); font-weight: 700; font-style: normal; font-display: swap; }
@font-face { font-family: "Instrument Serif"; src: url("fonts/instrument-serif-400.woff2") format("woff2"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "Instrument Serif"; src: url("fonts/instrument-serif-400-italic.woff2") format("woff2"); font-weight: 400; font-style: italic; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("fonts/jetbrains-mono-400.woff2") format("woff2"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("fonts/jetbrains-mono-500.woff2") format("woff2"); font-weight: 500; font-style: normal; font-display: swap; }

:root {
  --canvas: #fafafa;
  --ink: #171717;
  --graphite: #242424;
  --pencil: #5c5c5c;
  --faint: #a3a3a3;
  --hairline: #e5e7eb;
  --divider: #dadada;
  --card: #ededed;

  /* fixed, doesn't flip with theme — the announce bar and terminal are always the
     dark tier (in light mode: near-black-on-page; in dark mode: darker-than-page),
     so text sitting on them is always this light tone, not the theme's --canvas. */
  --on-dark-surface: #f5f5f3;

  /* the "loudest element" button flips fill/text between themes rather than just
     recoloring in place — in light mode it's dark-on-cream, in dark mode light-on-ink,
     so it stays the single highest-contrast surface either way. */
  --btn-fill: var(--graphite);
  --btn-text: var(--canvas);
  --btn-bevel-hi: rgba(255, 255, 255, 0.16);
  --btn-bevel-lo: rgba(0, 0, 0, 0.28);

  --sans: "Inter", ui-sans-serif, system-ui, sans-serif;
  --serif: "Instrument Serif", ui-serif, Georgia, serif;
  --mono: "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  --max-w: 1200px;
  --r-lg: 24px;
  --r-md: 16px;

  color-scheme: light;
}

/* Warm dark counterpart — same "one lightness step" elevation principle, same soft
   rounded/no-shadow system, just inverted. Not pure black: a warm dark graphite to
   match the warm off-white of the light canvas, not a generic near-void. Applies
   automatically from system preference, or explicitly via the toggle's [data-theme]. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --canvas: #18171b;
    --ink: #f2f1ee;
    --graphite: #0d0c0f;
    --pencil: #a8a6a1;
    --faint: #6b6965;
    --hairline: #2d2c31;
    --divider: #38373c;
    --card: #201f24;
    --btn-fill: #f2f1ee;
    --btn-text: #18171b;
    --btn-bevel-hi: rgba(255, 255, 255, 0.06);
    --btn-bevel-lo: rgba(0, 0, 0, 0.4);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --canvas: #18171b;
  --ink: #f2f1ee;
  --graphite: #0d0c0f;
  --pencil: #a8a6a1;
  --faint: #6b6965;
  --hairline: #2d2c31;
  --divider: #38373c;
  --card: #201f24;
  --btn-fill: #f2f1ee;
  --btn-text: #18171b;
  --btn-bevel-hi: rgba(255, 255, 255, 0.06);
  --btn-bevel-lo: rgba(0, 0, 0, 0.4);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--sans);
  font-weight: 400;
  font-size: 18px;
  line-height: 1.33;
  transition: background-color 0.2s ease, color 0.2s ease;
  letter-spacing: -0.0025em;
  -webkit-font-smoothing: antialiased;
}

.container { max-width: var(--max-w); margin: 0 auto; padding: 0 32px; }

h1, h2 { font-family: var(--sans); font-weight: 700; letter-spacing: -0.03em; line-height: 1.05; margin: 0; color: var(--ink); }
h1 { font-size: clamp(2.6rem, 5.6vw, 4.6rem); letter-spacing: -0.04em; }
h2 { font-size: clamp(1.9rem, 3.4vw, 2.6rem); }
h3 { font-family: var(--sans); font-weight: 600; font-size: 1.05rem; letter-spacing: -0.01em; margin: 0 0 0.5em; }

em.accent {
  font-family: var(--serif);
  font-weight: 400;
  font-style: italic;
  letter-spacing: -0.025em;
}

p { margin: 0 0 1em; color: var(--pencil); max-width: 58ch; font-size: 1rem; line-height: 1.5; }
p.lede { font-size: 1.15rem; max-width: 50ch; }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-weight: 500;
  font-size: 0.72rem;
  letter-spacing: -0.006em;
  text-transform: uppercase;
  color: var(--pencil);
  background: var(--card);
  border-radius: 999px;
  padding: 7px 16px;
}

.eyebrow {
  display: block;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.78rem;
  letter-spacing: -0.005em;
  text-transform: uppercase;
  color: var(--faint);
  margin-bottom: 16px;
}

code { font-family: var(--mono); font-size: 0.85em; color: var(--ink); }

a { color: var(--ink); text-decoration-color: var(--hairline); text-underline-offset: 3px; }
a:hover { text-decoration-color: var(--ink); }
a:focus-visible, button:focus-visible { outline: 2px solid var(--graphite); outline-offset: 3px; }

section { padding: 64px 0; }
.section-head { max-width: 640px; margin: 0 auto 48px; text-align: center; }
.section-head p { margin-left: auto; margin-right: auto; }

/* ---------- Announcement ---------- */
.announce { background: var(--graphite); color: var(--on-dark-surface); }
.announce .container {
  display: flex; align-items: center; justify-content: center; gap: 18px; flex-wrap: wrap;
  padding: 11px 32px; font-size: 0.85rem;
}
.announce a { color: var(--on-dark-surface); text-decoration-color: rgba(245, 245, 243, 0.4); }
.announce a:hover { text-decoration-color: var(--on-dark-surface); }

/* ---------- Header ---------- */
.site-header { padding: 20px 0; }
.header-row { display: flex; align-items: center; gap: 32px; }
.wordmark { font-weight: 700; font-size: 1.15rem; letter-spacing: -0.02em; color: var(--ink); }
.wordmark:hover { text-decoration: none; }
.site-nav { display: flex; gap: 26px; flex: 1; justify-content: center; }
.site-nav a { font-weight: 500; font-size: 0.9rem; color: var(--pencil); text-decoration: none; }
.site-nav a:hover { color: var(--ink); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--sans); font-weight: 500; font-size: 0.92rem; letter-spacing: -0.01em;
  border-radius: var(--r-md);
  padding: 12px 22px;
  text-decoration: none;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--btn-fill);
  color: var(--btn-text);
  box-shadow: inset 0 1px 0 var(--btn-bevel-hi), inset 0 -2px 0 var(--btn-bevel-lo);
}
.btn-primary:hover { filter: brightness(0.92); }
.btn-ghost { background: transparent; border-color: var(--hairline); color: var(--ink); }
.btn-ghost:hover { border-color: var(--faint); }
.btn-sm { padding: 9px 18px; font-size: 0.85rem; border-radius: 12px; }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: 999px;
  border: 1px solid var(--hairline);
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  flex-shrink: 0;
}
.theme-toggle:hover { border-color: var(--faint); }
.theme-toggle svg { width: 17px; height: 17px; }
.theme-toggle .icon-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-sun { display: none; }
  :root:not([data-theme="light"]) .theme-toggle .icon-moon { display: block; }
}

.actions { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }

/* ---------- Hero (centered stack) ---------- */
.hero { padding: 72px 0 0; text-align: center; }
.hero-tag { display: flex; justify-content: center; margin-bottom: 28px; }
.hero h1 { max-width: 16ch; margin: 0 auto 22px; }
.hero .lede { margin: 0 auto 34px; text-align: center; }

.showcase-frame {
  margin-top: 56px;
  border: 1px solid var(--hairline);
  border-radius: var(--r-lg);
  padding: 32px;
  background: var(--canvas);
}
.showcase-frame svg { width: 100%; max-width: 760px; height: auto; display: block; margin: 0 auto; }
.wave-grid { stroke: var(--hairline); }
.wave-axis { stroke: var(--divider); }
.wave-line { stroke: var(--ink); }
.wave-baseline { stroke: var(--faint); }
.wave-label { fill: var(--faint); }
.wave-event-band { fill: var(--card); }
.showcase-caption { text-align: center; margin-top: 18px; }
.showcase-caption span { font-family: var(--mono); font-size: 0.7rem; letter-spacing: -0.006em; color: var(--faint); text-transform: uppercase; }

/* ---------- Proof strip: logos-on-canvas treatment ---------- */
.proof-strip { padding: 44px 0; }
.chip-row { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 12px 40px; }
.chip { font-size: 0.88rem; font-weight: 500; color: var(--faint); }

/* ---------- Cards (workflow / architecture / credibility) ---------- */
.card-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.card {
  background: var(--card);
  border-radius: var(--r-lg);
  padding: 24px;
}
.card-index { display: block; font-family: var(--mono); font-size: 0.7rem; letter-spacing: -0.006em; color: var(--faint); margin-bottom: 28px; text-transform: uppercase; }
.card-title { display: block; font-weight: 600; font-size: 1.05rem; letter-spacing: -0.01em; margin-bottom: 8px; color: var(--ink); }
.card p { font-size: 0.92rem; margin: 0; color: var(--pencil); }

/* ---------- Deployment table (framed) ---------- */
.table-frame { border: 1px solid var(--hairline); border-radius: var(--r-lg); overflow: hidden; }
.table-scroll { overflow-x: auto; }
.deploy-table { width: 100%; border-collapse: collapse; min-width: 720px; }
.deploy-table th, .deploy-table td { text-align: left; padding: 18px 22px; border-bottom: 1px solid var(--hairline); }
.deploy-table tr:last-child td { border-bottom: none; }
.deploy-table th { font-size: 0.76rem; font-weight: 600; letter-spacing: -0.005em; text-transform: uppercase; color: var(--faint); background: var(--card); }
.deploy-table td:first-child { font-weight: 600; }
.deploy-table td:last-child { color: var(--pencil); max-width: 34ch; }

/* ---------- CLI (dark surface tier) ---------- */
.cli-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 48px; align-items: center; }
.cli-points { margin: 22px 0 0; padding: 0; list-style: none; }
.cli-points li { padding: 12px 0; border-top: 1px solid var(--hairline); font-size: 0.95rem; color: var(--pencil); }
.cli-points li:last-child { border-bottom: 1px solid var(--hairline); }

.terminal-window { background: var(--graphite); border: 1px solid rgba(255, 255, 255, 0.06); border-radius: var(--r-lg); overflow: hidden; }
.terminal-titlebar { display: flex; align-items: center; gap: 7px; padding: 16px 20px; }
.terminal-dot { width: 9px; height: 9px; border-radius: 50%; background: #3a3a3a; }
.terminal-body { margin: 0; padding: 0 22px 24px; font-family: var(--mono); font-size: 0.85rem; line-height: 1.7; overflow-x: auto; color: #d9d9d9; }
.term-prompt { color: var(--on-dark-surface); font-weight: 500; }
.term-out { color: var(--faint); }

/* ---------- Credibility ---------- */
.credibility .card-grid { grid-template-columns: repeat(2, 1fr); }
.credibility-footnote { margin-top: 32px; font-size: 0.86rem; color: var(--faint); text-align: center; font-style: italic; }

/* ---------- Final CTA ---------- */
.final-cta { text-align: center; background: var(--card); border-radius: var(--r-lg); padding: 72px 40px; }
.final-cta h2 { margin-bottom: 28px; }

/* ---------- Footer ---------- */
.site-footer { padding: 36px 0 52px; }
.site-footer .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
.site-footer p { margin: 0; color: var(--faint); font-size: 0.85rem; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .card-grid, .credibility .card-grid { grid-template-columns: repeat(2, 1fr); }
  .cli-grid { grid-template-columns: 1fr; }
  .site-nav { display: none; }
}

@media (max-width: 560px) {
  .container { padding: 0 20px; }
  section { padding: 48px 0; }
  .hero { padding-top: 48px; }
  .card-grid, .credibility .card-grid { grid-template-columns: 1fr; }
  .final-cta { padding: 48px 24px; border-radius: var(--r-md); }
  .actions { flex-direction: column; align-items: stretch; }
  .btn { justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}