:root {
  color-scheme: light;
  --font-sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --bg: #ffffff;
  --bg-subtle: #f7f8fb;
  --surface: rgba(255, 255, 255, 0.92);
  --surface-solid: #ffffff;
  --surface-hover: #f3f5f9;
  --surface-active: #eef4ff;
  --border: #e6e8ee;
  --border-strong: #d8dce5;
  --text: #111827;
  --text-muted: #667085;
  --text-faint: #98a2b3;
  --brand: #2f6df6;
  --brand-hover: #245bd4;
  --brand-soft: #eef4ff;
  --brand-strong: #1749b8;
  --success: #039855;
  --success-soft: #ecfdf3;
  --warning: #b54708;
  --warning-soft: #fffaeb;
  --danger: #d92d20;
  --code-bg: #111827;
  --code-text: #e5e7eb;

  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.04);
  --shadow-md: 0 8px 24px rgba(16, 24, 40, 0.08);
  --shadow-lg: 0 20px 48px rgba(16, 24, 40, 0.14);

  --header-h: 66px;
  --sidebar-w: 284px;
  --outline-w: 238px;
  --content-max: 1000px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --ease: 180ms cubic-bezier(.2,.8,.2,1);
}

html[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0d1117;
  --bg-subtle: #111722;
  --surface: rgba(13, 17, 23, 0.9);
  --surface-solid: #111722;
  --surface-hover: #171f2d;
  --surface-active: #142244;
  --border: #252d3a;
  --border-strong: #354052;
  --text: #f5f7fa;
  --text-muted: #aab4c4;
  --text-faint: #768196;
  --brand: #6d9cff;
  --brand-hover: #8ab0ff;
  --brand-soft: #142244;
  --brand-strong: #b6ccff;
  --success: #32d583;
  --success-soft: #0d2e20;
  --warning: #fdb022;
  --warning-soft: #35250c;
  --danger: #f97066;
  --code-bg: #080b10;
  --code-text: #e5e7eb;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.28);
  --shadow-md: 0 12px 30px rgba(0,0,0,.30);
  --shadow-lg: 0 24px 60px rgba(0,0,0,.46);
}