/* ========================================================================
   Strait Systems — landing page
   Hyper-technical, oceanic, institutional.
   ======================================================================== */

:root {
  /* Spacing scale — tweakable via panel */
  --space-unit: 8px;
  --section-pad: 120px;
  --gutter: 32px;
  --maxw: 1440px;

  /* Type scale */
  --fs-display: clamp(48px, 6.6vw, 96px);
  --fs-h2: clamp(32px, 3.4vw, 52px);
  --fs-h3: 22px;
  --fs-body: 16px;
  --fs-mono: 12px;
  --fs-mono-sm: 10.5px;

  /* Radii — kept small, this is engineering UI */
  --r-sm: 2px;
  --r-md: 4px;

  /* Motion */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* ---------- THEMES ---------- */
:root,
[data-theme="dark"] {
  --bg-0: #040912;            /* page background */
  --bg-1: #070e1c;            /* elevated panels */
  --bg-2: #0c1628;            /* deeper surfaces */
  --bg-glass: rgba(7, 14, 28, 0.72);

  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);
  --line-accent: rgba(77, 217, 255, 0.32);

  --fg: #e6edf7;
  --fg-dim: #8a99b3;
  --fg-faint: #54607a;

  --accent: #4dd9ff;          /* strait electric */
  --accent-2: #5effd6;        /* strait teal */
  --accent-warm: #ffb37a;     /* warning / log highlight */
  --accent-glow: rgba(77, 217, 255, 0.18);

  --status-ok: #5effd6;
  --status-warn: #ffb37a;
  --status-err: #ff6a8b;

  --grid-line: rgba(120, 160, 220, 0.06);
  --grid-line-strong: rgba(120, 160, 220, 0.12);

  color-scheme: dark;
}

[data-theme="light"] {
  --bg-0: #f4f6fa;
  --bg-1: #ffffff;
  --bg-2: #eaeef5;
  --bg-glass: rgba(255, 255, 255, 0.78);

  --line: rgba(7, 19, 38, 0.10);
  --line-strong: rgba(7, 19, 38, 0.22);
  --line-accent: rgba(0, 122, 178, 0.4);

  --fg: #0a1628;
  --fg-dim: #4a5a78;
  --fg-faint: #8a97b0;

  --accent: #007bb6;
  --accent-2: #00a98a;
  --accent-warm: #c4630a;
  --accent-glow: rgba(0, 123, 182, 0.14);

  --status-ok: #00a98a;
  --status-warn: #c4630a;
  --status-err: #c4365a;

  --grid-line: rgba(7, 19, 38, 0.05);
  --grid-line-strong: rgba(7, 19, 38, 0.10);

  color-scheme: light;
}

/* ---------- RESET / BASE ---------- */
* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg-0);
  color: var(--fg);
  font-family: "Space Grotesk", ui-sans-serif, system-ui, -apple-system, sans-serif;
  font-size: var(--fs-body);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "ss01", "ss02";
  overflow-x: hidden;
  transition: background-color 240ms var(--ease), color 240ms var(--ease);
}

.mono {
  font-family: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
  font-size: var(--fs-mono);
  letter-spacing: 0.02em;
  font-feature-settings: "ss01", "zero", "calt";
}

.mono-xs {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: var(--fs-mono-sm);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-faint);
}

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; }
::selection { background: var(--accent-glow); color: var(--fg); }

/* ---------- BACKDROP GRID ---------- */
.backdrop-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    linear-gradient(to right, var(--grid-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 120% 80% at 50% 30%, #000 30%, transparent 100%);
}

.page { position: relative; z-index: 1; }

/* ---------- CONTAINER ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ---------- NAV ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-glass);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  backdrop-filter: blur(20px) saturate(140%);
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 48px;
  height: 64px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: -0.01em;
  font-size: 15px;
}

.brand-mark {
  width: 22px;
  height: 22px;
  position: relative;
  flex-shrink: 0;
}

.brand-mark svg { display: block; }

.brand-name { display: flex; align-items: baseline; gap: 6px; }
.brand-name small {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  color: var(--fg-faint);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  gap: 28px;
  align-items: center;
  flex: 1;
}

.nav-link {
  font-size: 13.5px;
  color: var(--fg-dim);
  transition: color 160ms var(--ease);
  position: relative;
}

.nav-link:hover { color: var(--fg); }

.nav-link.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -22px;
  height: 1px;
  background: var(--accent);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  color: var(--fg-dim);
  letter-spacing: 0.04em;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--status-ok);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--status-ok), transparent 78%);
  animation: pulse 2.4s var(--ease) infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.55; }
}

.theme-toggle {
  width: 32px; height: 32px;
  display: grid; place-items: center;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  cursor: pointer;
  color: var(--fg-dim);
  transition: all 160ms var(--ease);
}
.theme-toggle:hover {
  color: var(--fg);
  border-color: var(--line-strong);
  background: var(--bg-1);
}
.theme-toggle svg { display: block; }
[data-theme="dark"] .theme-toggle .sun { display: block; }
[data-theme="dark"] .theme-toggle .moon { display: none; }
[data-theme="light"] .theme-toggle .sun { display: none; }
[data-theme="light"] .theme-toggle .moon { display: block; }

/* ---------- BUTTONS ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 11px 18px;
  font-size: 13.5px;
  font-weight: 500;
  letter-spacing: 0.01em;
  border: 1px solid transparent;
  border-radius: var(--r-md);
  cursor: pointer;
  background: transparent;
  color: var(--fg);
  transition: all 180ms var(--ease);
  position: relative;
  white-space: nowrap;
}

.btn-primary {
  background: var(--fg);
  color: var(--bg-0);
  border-color: var(--fg);
}
.btn-primary:hover {
  background: var(--accent);
  color: var(--bg-0);
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-glow);
}

.btn-accent {
  background: var(--accent);
  color: #04101a;
  border-color: var(--accent);
}
.btn-accent:hover {
  background: var(--accent-2);
  border-color: var(--accent-2);
  box-shadow: 0 0 0 4px var(--accent-glow);
}

.btn-ghost {
  border-color: var(--line-strong);
  color: var(--fg);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-glow);
}

.btn .arrow {
  display: inline-block;
  transition: transform 200ms var(--ease);
}
.btn:hover .arrow { transform: translateX(3px); }

/* ---------- SECTION HEADER ---------- */
.section { padding: var(--section-pad) 0; position: relative; }
.section + .section { border-top: 1px solid var(--line); }

.section-eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  color: var(--fg-faint);
}
.section-eyebrow .index {
  color: var(--accent);
}
.section-eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--accent);
}

.section-title {
  font-size: var(--fs-h2);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.05;
  max-width: 22ch;
  text-wrap: balance;
}

.section-lede {
  font-size: 18px;
  color: var(--fg-dim);
  max-width: 56ch;
  margin-top: 24px;
  line-height: 1.55;
}

/* ---------- HERO ---------- */
.hero {
  padding-top: 88px;
  padding-bottom: 80px;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 1fr;
  gap: 80px;
  align-items: center;
}

.hero-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 40px;
}
.hero-meta-row {
  display: flex;
  gap: 32px;
  color: var(--fg-faint);
}
.hero-meta-row span:first-child { color: var(--fg-dim); }

.hero h1 {
  font-size: var(--fs-display);
  font-weight: 400;
  letter-spacing: -0.035em;
  line-height: 0.96;
  text-wrap: balance;
}
.hero h1 em {
  font-style: normal;
  color: var(--accent);
  position: relative;
}
.hero h1 em::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 1px;
  background: var(--accent);
  opacity: 0.5;
}

.hero-sub {
  margin-top: 28px;
  font-size: 19px;
  line-height: 1.55;
  color: var(--fg-dim);
  max-width: 56ch;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 40px;
  flex-wrap: wrap;
}

.hero-stats {
  margin-top: 64px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--line);
}
.hero-stat {
  padding: 20px 16px 0 0;
}
.hero-stat-num {
  font-size: 28px;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--fg);
  font-feature-settings: "tnum";
  font-variant-numeric: tabular-nums;
}
.hero-stat-label {
  margin-top: 4px;
  color: var(--fg-faint);
}

/* ---------- HERO VISUAL — convergence grid ---------- */
.convergence {
  position: relative;
  aspect-ratio: 1 / 1.05;
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.02),
    0 30px 80px -30px rgba(0, 0, 0, 0.5);
}

.convergence::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--grid-line-strong) 1px, transparent 1px),
    linear-gradient(to bottom, var(--grid-line-strong) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

.convergence-corners > span {
  position: absolute;
  width: 14px; height: 14px;
  border: 1px solid var(--accent);
  pointer-events: none;
}
.convergence-corners > span:nth-child(1) { top: 10px; left: 10px; border-right: 0; border-bottom: 0; }
.convergence-corners > span:nth-child(2) { top: 10px; right: 10px; border-left: 0; border-bottom: 0; }
.convergence-corners > span:nth-child(3) { bottom: 10px; left: 10px; border-right: 0; border-top: 0; }
.convergence-corners > span:nth-child(4) { bottom: 10px; right: 10px; border-left: 0; border-top: 0; }

.convergence-label {
  position: absolute;
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-faint);
  padding: 6px 10px;
  background: var(--bg-1);
}
.convergence-label.tl { top: 22px; left: 36px; }
.convergence-label.br { bottom: 22px; right: 36px; }
.convergence-label.tr {
  top: 22px; right: 36px;
  color: var(--accent);
  border: 1px solid var(--line-accent);
}

.convergence svg { position: absolute; inset: 0; width: 100%; height: 100%; }

/* ---------- DUAL ENGINE ---------- */
.dual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin-top: 64px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--bg-1);
  position: relative;
}

.engine {
  padding: 48px 40px 44px;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 24px;
  transition: background-color 240ms var(--ease);
}
.engine + .engine { border-left: 1px solid var(--line); }
.engine:hover { background: var(--bg-2); }

.engine-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
}
.engine-tag {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 4px 10px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
}
.engine-tag .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.engine.research .engine-tag .dot { background: var(--accent-2); }

.engine-num {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--fg-faint);
}

.engine h3 {
  font-size: 30px;
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.1;
  max-width: 14ch;
}

.engine-desc {
  color: var(--fg-dim);
  font-size: 15.5px;
  line-height: 1.55;
  max-width: 42ch;
}

.engine-list {
  list-style: none;
  border-top: 1px solid var(--line);
  margin-top: 8px;
}
.engine-list li {
  display: grid;
  grid-template-columns: 80px 1fr auto;
  align-items: center;
  gap: 24px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  color: var(--fg);
}
.engine-list .code {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  color: var(--fg-faint);
  letter-spacing: 0.06em;
}
.engine-list .meta {
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  color: var(--fg-faint);
}

.engine-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 8px;
}

.engine-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-size: 13.5px;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: border-color 160ms var(--ease);
}
.engine.research .engine-link { color: var(--accent-2); }
.engine-link:hover { border-color: currentColor; }

/* divider stamp between cards */
.dual::after {
  content: "x";
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 28px; height: 28px;
  display: grid; place-items: center;
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: 50%;
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  color: var(--fg-dim);
}

/* ---------- TANGIER ANCHOR ---------- */
.anchor {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 80px;
  margin-top: 56px;
  align-items: start;
}

.anchor-text h2 {
  font-size: var(--fs-h2);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.05;
  text-wrap: balance;
}
.anchor-text p {
  margin-top: 28px;
  color: var(--fg-dim);
  font-size: 17px;
  line-height: 1.6;
  max-width: 52ch;
}

.coord-grid {
  margin-top: 48px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px 48px;
  border-top: 1px solid var(--line);
  padding-top: 32px;
}
.coord-item dt {
  font-family: "JetBrains Mono", monospace;
  font-size: 10.5px;
  color: var(--fg-faint);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 6px;
}
.coord-item dd {
  font-size: 16px;
  color: var(--fg);
  font-feature-settings: "tnum";
}

/* — schematic of the strait — */
.strait-card {
  position: relative;
  aspect-ratio: 4 / 5;
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  overflow: hidden;
}
.strait-card svg { width: 100%; height: 100%; display: block; }
.strait-stamp {
  position: absolute;
  inset: 14px;
  pointer-events: none;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.strait-stamp .row {
  display: flex;
  justify-content: space-between;
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  color: var(--fg-faint);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.strait-stamp .row strong {
  color: var(--accent);
  font-weight: 500;
}

/* ---------- SANDBOX ---------- */
.sandbox {
  margin-top: 56px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--bg-1);
  overflow: hidden;
}

.sandbox-chrome {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-2);
  font-family: "JetBrains Mono", monospace;
  font-size: 11px;
  color: var(--fg-faint);
  letter-spacing: 0.05em;
}
.sandbox-chrome .dots {
  display: flex; gap: 6px;
}
.sandbox-chrome .dots i {
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--line-strong);
  display: block;
}
.sandbox-chrome .dots i:first-child { background: var(--status-err); opacity: 0.7; }
.sandbox-chrome .dots i:nth-child(2) { background: var(--status-warn); opacity: 0.7; }
.sandbox-chrome .dots i:nth-child(3) { background: var(--status-ok); opacity: 0.7; }

.sandbox-chrome .path { flex: 1; text-align: center; }
.sandbox-chrome .meta { color: var(--accent); }

.sandbox-tabs {
  display: flex;
  border-bottom: 1px solid var(--line);
  background: var(--bg-2);
  overflow-x: auto;
}
.sandbox-tab {
  appearance: none;
  background: transparent;
  border: 0;
  border-right: 1px solid var(--line);
  padding: 14px 22px;
  font-size: 12.5px;
  color: var(--fg-dim);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 10px;
  position: relative;
  transition: color 160ms var(--ease), background-color 160ms var(--ease);
  white-space: nowrap;
}
.sandbox-tab .tag {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  color: var(--fg-faint);
  letter-spacing: 0.08em;
}
.sandbox-tab:hover { color: var(--fg); background: var(--bg-1); }
.sandbox-tab.active {
  color: var(--fg);
  background: var(--bg-1);
}
.sandbox-tab.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 1px;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent-glow);
}

.sandbox-body {
  display: grid;
  grid-template-columns: 320px 1fr;
  min-height: 480px;
}

.sandbox-aside {
  border-right: 1px solid var(--line);
  padding: 24px 24px 24px 24px;
  background: var(--bg-1);
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.sandbox-aside h4 {
  font-size: 17px;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.sandbox-aside p {
  font-size: 13.5px;
  color: var(--fg-dim);
  line-height: 1.6;
}

.sandbox-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  margin-top: auto;
}
.sandbox-metric {
  background: var(--bg-1);
  padding: 12px 14px;
}
.sandbox-metric .k {
  font-family: "JetBrains Mono", monospace;
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-faint);
}
.sandbox-metric .v {
  font-size: 18px;
  font-weight: 500;
  margin-top: 4px;
  font-variant-numeric: tabular-nums;
}
.sandbox-metric .v.accent { color: var(--accent); }
.sandbox-metric .v.teal { color: var(--accent-2); }

.sandbox-console {
  display: flex;
  flex-direction: column;
  background:
    linear-gradient(to bottom, transparent, transparent 31px, var(--line) 31px, var(--line) 32px),
    var(--bg-0);
  background-size: 100% 32px;
  font-family: "JetBrains Mono", monospace;
  font-size: 12px;
  line-height: 32px;
  color: var(--fg-dim);
  overflow: hidden;
  position: relative;
}

.sandbox-console-head {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 20px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-2);
  font-size: 11px;
  color: var(--fg-faint);
  letter-spacing: 0.06em;
  line-height: 36px;
  height: 36px;
}
.sandbox-console-head .live {
  display: inline-flex; align-items: center; gap: 6px; color: var(--status-ok);
}
.sandbox-console-head .live i {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--status-ok);
  animation: pulse 1.4s var(--ease) infinite;
}
.sandbox-console-head .spacer { flex: 1; }

.log {
  flex: 1;
  padding: 0 20px;
  overflow-y: auto;
  scroll-behavior: smooth;
}
.log::-webkit-scrollbar { width: 8px; }
.log::-webkit-scrollbar-track { background: transparent; }
.log::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: 4px; }

.log-line {
  display: grid;
  grid-template-columns: 86px 56px 1fr;
  gap: 16px;
  align-items: baseline;
  white-space: nowrap;
  animation: logIn 220ms var(--ease) both;
}
@keyframes logIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

.log-line .t { color: var(--fg-faint); }
.log-line .lvl {
  font-size: 10px;
  letter-spacing: 0.08em;
  padding: 1px 6px;
  border: 1px solid currentColor;
  border-radius: 2px;
  display: inline-block;
  line-height: 18px;
  height: 20px;
  text-align: center;
  align-self: center;
}
.log-line .lvl.info { color: var(--accent); }
.log-line .lvl.ok { color: var(--accent-2); }
.log-line .lvl.warn { color: var(--accent-warm); }
.log-line .lvl.exec { color: var(--fg-dim); }

.log-line .msg b { color: var(--fg); font-weight: 500; }
.log-line .msg span.k { color: var(--accent); }
.log-line .msg span.v { color: var(--fg); }
.log-line .msg span.dim { color: var(--fg-faint); }

.sandbox-foot {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 20px;
  border-top: 1px solid var(--line);
  background: var(--bg-2);
  font-family: "JetBrains Mono", monospace;
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--fg-faint);
}
.sandbox-foot .ok { color: var(--status-ok); }

/* ---------- FOOTER ---------- */
.footer {
  border-top: 1px solid var(--line);
  padding: 96px 0 32px;
  margin-top: 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 64px;
}

.footer-brand h3 {
  font-size: 36px;
  font-weight: 400;
  letter-spacing: -0.025em;
  line-height: 1.1;
  text-wrap: balance;
  max-width: 22ch;
}
.footer-brand h3 em {
  font-style: normal;
  color: var(--accent);
}
.footer-brand p {
  margin-top: 18px;
  color: var(--fg-dim);
  max-width: 36ch;
  font-size: 14.5px;
  line-height: 1.55;
}

.footer-col h5 {
  font-family: "JetBrains Mono", monospace;
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-faint);
  margin-bottom: 18px;
}
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-col a {
  color: var(--fg-dim);
  font-size: 14px;
  transition: color 160ms var(--ease);
}
.footer-col a:hover { color: var(--accent); }

.footer-legal {
  margin-top: 80px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  font-family: "JetBrains Mono", monospace;
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--fg-faint);
}
.footer-legal .compass {
  display: inline-flex; align-items: center; gap: 8px;
}
.footer-legal .compass i {
  display: inline-block; width: 6px; height: 6px;
  background: var(--accent);
  transform: rotate(45deg);
}

/* ---------- RESPONSIVE FALLBACKS (this is a desktop prototype) ---------- */
@media (max-width: 1100px) {
  .hero-grid, .anchor { grid-template-columns: 1fr; gap: 56px; }
  .dual { grid-template-columns: 1fr; }
  .engine + .engine { border-left: 0; border-top: 1px solid var(--line); }
  .sandbox-body { grid-template-columns: 1fr; }
  .sandbox-aside { border-right: 0; border-bottom: 1px solid var(--line); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}