/* VibeVal — Corporate refresh design tokens
 * Light-first, near-monochrome surface, single deep-blue accent.
 * Posture: Stripe / Linear — precise, hairline-driven, product-led.
 * Apply with [data-theme="dark"] on <html> for terminals / low-light QA.
 */

@font-face {
  font-family: "Inter";
  src: url("/fonts/InterVariable.ttf") format("truetype-variations");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

:root {
  /* NEUTRALS */
  --neutral-0:   #ffffff;
  --neutral-25:  #fafafa;
  --neutral-50:  #f5f5f5;
  --neutral-100: #ebebec;
  --neutral-200: #d6d7d9;
  --neutral-300: #a8aaad;
  --neutral-400: #737578;
  --neutral-500: #4a4c4f;
  --neutral-600: #313336;
  --neutral-700: #1f2124;
  --neutral-800: #141518;
  --neutral-900: #0a0b0d;
  --neutral-950: #050608;

  /* BRAND — deep blue */
  --accent-50:  #eff4fb;
  --accent-100: #dbe6f5;
  --accent-200: #b6cae8;
  --accent-300: #8aabd9;
  --accent-400: #5586c5;
  --accent-500: #2e63ad;
  --accent-600: #1f4f96;
  --accent-700: #173d77;
  --accent-800: #112d59;
  --accent-900: #0c2040;

  /* SEMANTIC */
  --success-500: #15803d;
  --success-600: #166534;
  --success-bg:  rgba(21, 128, 61, 0.08);
  --warn-500: #b45309;
  --warn-600: #92400e;
  --warn-bg:  rgba(180, 83, 9, 0.08);
  --danger-500: #b91c1c;
  --danger-600: #991b1b;
  --danger-bg:  rgba(185, 28, 28, 0.08);
  --info-500: var(--accent-500);
  --info-bg:  var(--accent-50);

  /* Risk class palette */
  --risk-a: var(--neutral-400);
  --risk-b: var(--warn-500);
  --risk-c: var(--danger-500);

  /* SURFACES — light theme default. line bumped to neutral-200 for visible
   * card borders against near-white surface; intentionally one step warmer
   * than the spec for readability. */
  --bg:        var(--neutral-0);
  --surface:   var(--neutral-25);
  --surface-2: var(--neutral-50);
  --line:      var(--neutral-200);
  --line-strong: var(--neutral-300);

  --fg:        var(--neutral-900);
  --fg-muted:  var(--neutral-500);
  --fg-subtle: var(--neutral-400);
  --fg-onaccent: #ffffff;

  --accent:    var(--accent-600);
  --accent-hover: var(--accent-700);
  --accent-bg: var(--accent-50);

  /* Legacy aliases — keep page CSS that references these working */
  --bg-2: var(--surface);
  --muted: var(--fg-muted);
  --code-bg: var(--surface);
  --success: var(--success-500);
  --warn: var(--warn-500);
  --danger: var(--danger-500);
  --accent-soft: var(--accent-50);

  /* TYPE */
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --font-display: "Inter", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;

  --tracking-tight: -0.02em;
  --tracking-snug:  -0.01em;
  --tracking-eyebrow: 0.08em;

  /* RADII */
  --radius-sm: 3px;
  --radius-md: 5px;
  --radius-lg: 6px;
  --radius-xl: 8px;
  --radius-2xl: 10px;
  --radius-full: 9999px;

  /* BORDERS / SHADOWS */
  --border-hairline: 1px solid var(--line);
  --border-strong:   1px solid var(--line-strong);
  --shadow-xs: 0 1px 0 rgba(10, 11, 13, 0.04);
  --shadow-sm: 0 1px 2px rgba(10, 11, 13, 0.06);
  --shadow-md: 0 4px 12px -4px rgba(10, 11, 13, 0.08);
  --shadow-lg: 0 12px 32px -10px rgba(10, 11, 13, 0.12);
  --shadow-focus: 0 0 0 3px rgba(31, 79, 150, 0.18);

  /* MOTION */
  --ease-out: cubic-bezier(0.2, 0.7, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --dur-fast: 120ms;
  --dur-base: 180ms;
  --dur-slow: 260ms;
}

[data-theme="dark"] {
  --bg:        var(--neutral-900);
  --surface:   var(--neutral-800);
  --surface-2: var(--neutral-700);
  --line:      var(--neutral-700);
  --line-strong: var(--neutral-600);
  --fg:        #ededee;
  --fg-muted:  var(--neutral-300);
  --fg-subtle: var(--neutral-400);
  --accent:    var(--accent-400);
  --accent-hover: var(--accent-300);
  --accent-bg: rgba(85, 134, 197, 0.10);
  --shadow-xs: none;
  --shadow-sm: none;
  --shadow-md: none;
  --shadow-lg: 0 18px 40px -12px rgba(0,0,0,0.6);
  --shadow-focus: 0 0 0 3px rgba(85, 134, 197, 0.25);
  --success-bg: rgba(34, 197, 94, 0.10);
  --warn-bg:    rgba(217, 119, 6, 0.12);
  --danger-bg:  rgba(220, 38, 38, 0.12);
  --bg-2: var(--surface);
  --code-bg: var(--surface);
}

html, body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3 { letter-spacing: var(--tracking-tight); }
::selection { background: var(--accent); color: var(--fg-onaccent); }

/* Theme toggle button — used in every page nav */
[data-theme-toggle] {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: 1px solid var(--line-strong);
  background: var(--surface);
  color: var(--fg);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  line-height: 1;
  padding: 0;
  transition: border-color var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out),
              background var(--dur-fast) var(--ease-out);
}
[data-theme-toggle]:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-bg);
}
[data-theme-toggle]:focus-visible {
  outline: none;
  box-shadow: var(--shadow-focus);
}
[data-theme-toggle] .sun,
[data-theme-toggle] .moon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1em;
  height: 1em;
}
[data-theme-toggle] .sun { display: none; }
[data-theme="dark"] [data-theme-toggle] .sun { display: inline-flex; }
[data-theme="dark"] [data-theme-toggle] .moon { display: none; }

/* Spacing in nav contexts — buttons don't get the anchor margin-left, give them their own gap */
nav .links [data-theme-toggle] { margin-left: 1.25rem; }
