:root {
  --color-bg: #fafbfd;
  --color-sidebar-bg: #ffffff;
  --color-surface: #f4f7fd;
  --color-border: #e7eaf0;
  --color-text: #0f172a;
  --color-text-muted: #55606e;
  --color-accent: #1b57d6;
  --color-accent-soft: #eef3fe;
  --color-code-bg: #f1f4f9;
  --color-callout-info-bg: #f4f7fd;
  --color-callout-info-border: #1b57d6;
  --color-callout-warn-bg: #fdf6ea;
  --color-callout-warn-border: #b15e14;
  --shadow-color: 10, 25, 48;

  --color-navy: #0a1930;
  --color-navy-surface: #101f3b;
  --color-navy-border: #1e2e4c;
  --color-navy-text: #ffffff;
  --color-navy-text-muted: #aebbd4;
  --color-accent-bright: #4c8dff;

  --font-display: "Space Grotesk", ui-sans-serif, system-ui, sans-serif;
  --font-sans: "Public Sans", -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --sidebar-width: 280px;
  --content-max-width: 720px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 40px;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* Dark theme follows the OS/browser preference by default. A visitor can
   still force either mode via the toggle (assets/js/theme.js), which sets
   an explicit [data-theme="dark"|"light"] and persists it in localStorage
   — that explicit choice always wins over prefers-color-scheme. */
:root[data-theme="dark"] {
  --color-bg: #0b1220;
  --color-sidebar-bg: #0d1729;
  --color-surface: #101c33;
  --color-border: #1f2c47;
  --color-text: #e7ecf7;
  --color-text-muted: #9aa8c2;
  --color-accent: #6ea0ff;
  --color-accent-soft: #14213e;
  --color-code-bg: #101c33;
  --color-callout-info-bg: #101c33;
  --color-callout-info-border: #6ea0ff;
  --color-callout-warn-bg: #241d10;
  --color-callout-warn-border: #c98a3c;
  --shadow-color: 0, 0, 0;

  --color-navy: #060d1c;
  --color-navy-surface: #0d1729;
  --color-navy-border: #1a2740;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]):not([data-theme="dark"]) {
    --color-bg: #0b1220;
    --color-sidebar-bg: #0d1729;
    --color-surface: #101c33;
    --color-border: #1f2c47;
    --color-text: #e7ecf7;
    --color-text-muted: #9aa8c2;
    --color-accent: #6ea0ff;
    --color-accent-soft: #14213e;
    --color-code-bg: #101c33;
    --color-callout-info-bg: #101c33;
    --color-callout-info-border: #6ea0ff;
    --color-callout-warn-bg: #241d10;
    --color-callout-warn-border: #c98a3c;
    --shadow-color: 0, 0, 0;

    --color-navy: #060d1c;
    --color-navy-surface: #0d1729;
    --color-navy-border: #1a2740;
  }
}