/* Design tokens. Light is the default; dark applies via [data-theme="dark"]
   or, with the "Match system" setting, the OS preference. */
:root {
  --font-sans: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic UI", "Yu Gothic", "Meiryo", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-jp: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic UI", "Yu Gothic", "Meiryo", sans-serif;
  --font-mincho: "Hiragino Mincho ProN", "Yu Mincho", "Noto Serif JP", "MS Mincho", serif;

  --bg: #f7f3ec;          /* warm washi off-white */
  --bg-pattern: rgba(31, 42, 68, 0.035);
  --surface: #ffffff;
  --surface-2: #f1ece3;
  --border: #e3dccf;
  --text: #22252b;        /* charcoal */
  --text-muted: #5f6370;
  --navy: #1f2a44;        /* ai-iro indigo */
  --navy-soft: #e7eaf2;
  --accent: #c8402a;      /* vermilion / shu-iro */
  --accent-hover: #ad3420;
  --accent-soft: #fbe9e4;
  --on-accent: #ffffff;
  --ok: #2d7a4f;
  --ok-soft: #e3f2e8;
  --bad: #b3261e;
  --bad-soft: #fbe5e3;
  --warn: #8a5a00;
  --warn-soft: #fdf1d8;
  --info-soft: #e8edf6;
  --help: #6b5bb5;
  --focus: #2f5bd3;

  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 22px;
  --shadow-sm: 0 1px 2px rgba(31, 42, 68, 0.06);
  --shadow: 0 1px 2px rgba(31, 42, 68, 0.05), 0 6px 18px rgba(31, 42, 68, 0.07);
  --shadow-lg: 0 10px 40px rgba(31, 42, 68, 0.18);
  --ease: cubic-bezier(.2, .7, .2, 1);
  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg: #12151c;
  --bg-pattern: rgba(255, 255, 255, 0.025);
  --surface: #1b1f29;
  --surface-2: #232836;
  --border: #2f3546;
  --text: #ecebe7;
  --text-muted: #a3a8b6;
  --navy: #c9d3ee;
  --navy-soft: #262d40;
  --accent: #ef6a52;
  --accent-hover: #f4826d;
  --accent-soft: #3a2420;
  --on-accent: #1a0f0c;
  --ok: #6cc893;
  --ok-soft: #1c3226;
  --bad: #f2867d;
  --bad-soft: #3b2120;
  --warn: #f0c060;
  --warn-soft: #3a3020;
  --info-soft: #232b3d;
  --help: #a99cf0;
  --focus: #8fb0ff;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 6px 18px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.5);
  color-scheme: dark;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --bg: #12151c;
    --bg-pattern: rgba(255, 255, 255, 0.025);
    --surface: #1b1f29;
    --surface-2: #232836;
    --border: #2f3546;
    --text: #ecebe7;
    --text-muted: #a3a8b6;
    --navy: #c9d3ee;
    --navy-soft: #262d40;
    --accent: #ef6a52;
    --accent-hover: #f4826d;
    --accent-soft: #3a2420;
    --on-accent: #1a0f0c;
    --ok: #6cc893;
    --ok-soft: #1c3226;
    --bad: #f2867d;
    --bad-soft: #3b2120;
    --warn: #f0c060;
    --warn-soft: #3a3020;
    --info-soft: #232b3d;
    --help: #a99cf0;
    --focus: #8fb0ff;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 6px 18px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.5);
    color-scheme: dark;
  }
}