/* Website v4 — DESIGN_TOKENS.md (Steel / Void). Cache: 20260802-v4 */
:root {
  /* Atmosphere */
  --bm-void: #06070A;
  --bm-void-mid: #0A0C10;
  --bm-panel: #0E1014;
  --bm-elevated: #151820;
  --bm-fog: rgba(122, 147, 168, 0.06);

  /* Structure */
  --bm-line: #242833;
  --bm-line-strong: #343B48;
  --bm-focus: #9EB4C6;

  /* Text */
  --bm-text: #E8EBF0;
  --bm-text-secondary: #9AA3B0;
  --bm-text-muted: #6B7380;

  /* Brand accent — structural steel (NOT purple) */
  --bm-accent: #7A93A8;
  --bm-accent-soft: #A8B8C6;
  --bm-accent-dim: rgba(122, 147, 168, 0.22);

  /* Authority instruments */
  --bm-hot-path: #C5D0DB;
  --bm-advisory: #6B7380;
  --bm-shadow: #8A7E6A;
  --bm-gate: #E8B84A;

  /* Status truth only */
  --bm-status-ok: #3DDC97;
  --bm-status-warn: #E8B84A;
  --bm-status-bad: #F07178;
  --bm-status-aged: #7A6F5C;
  --bm-status-unavailable: #5A6170;

  /* Typography */
  --bm-font-display: "Syne", sans-serif;
  --bm-font-body: "Source Sans 3", sans-serif;
  --bm-font-mono: "JetBrains Mono", ui-monospace, monospace;

  --type-brand: clamp(2.5rem, 6vw, 4.5rem);
  --type-h1: clamp(1.75rem, 3.5vw, 2.75rem);
  --type-h2: clamp(1.375rem, 2.5vw, 1.875rem);
  --type-lead: clamp(1rem, 1.5vw, 1.25rem);
  --type-body: clamp(0.9375rem, 1.1vw, 1.0625rem);
  --type-stamp: clamp(0.6875rem, 0.9vw, 0.8125rem);
  --type-edge-stamp: clamp(1rem, 2vw, 1.5rem);

  /* Space */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 40px;
  --space-6: 64px;
  --space-7: 96px;
  --space-8: 128px;
  --page-gutter: clamp(20px, 4vw, 64px);
  --section-y: clamp(64px, 10vw, 128px);
  --max-prose: 680px;
  --max-stage: 1200px;

  /* Motion */
  --motion-brand-ms: 500;
  --motion-packet-ms: 3500;
  --motion-gate-ms: 1000;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  --bm-radius: 4px;
  --header-h: 64px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

body.v4 {
  margin: 0;
  min-height: 100vh;
  background: var(--bm-void);
  color: var(--bm-text);
  font-family: var(--bm-font-body);
  font-size: var(--type-body);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

body.v4 a {
  color: var(--bm-accent-soft);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

body.v4 a:hover {
  color: var(--bm-text);
}

body.v4:focus-visible,
body.v4 *:focus-visible {
  outline: 2px solid var(--bm-focus);
  outline-offset: 3px;
}

.v4-skip {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 1000;
  padding: var(--space-2) var(--space-3);
  background: var(--bm-elevated);
  color: var(--bm-text);
  font-family: var(--bm-font-body);
}

.v4-skip:focus {
  left: var(--page-gutter);
  top: var(--space-2);
}

.v4-atmosphere {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 50% at 50% 0%, var(--bm-fog), transparent 55%),
    linear-gradient(180deg, var(--bm-void) 0%, var(--bm-void-mid) 45%, var(--bm-void) 100%);
}

.v4-atmosphere::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.035;
  background-image: repeating-linear-gradient(
    90deg,
    transparent,
    transparent 47px,
    rgba(197, 208, 219, 0.4) 48px,
    transparent 49px
  );
}