/* Hallmark · design-system: website/design.md · genre: atmospheric · route: custom (tuned)
 * theme: custom · vibe: "kaleidoscope spectrum, multi-identity colors, nocturnal prism"
 * paper: oklch(13.5% 0.014 275) · accent: oklch(66% 0.19 275)
 * display: Clash Display + PingFang SC · body: PingFang SC · mono: IBM Plex Mono
 * axes: dark / geometric-sans / cool
 * Locked tokens. Every colour and font in the site resolves through a name here.
 */

/* ── Self-hosted fonts (no runtime request to Google Fonts / Fontshare) ───── */

@font-face {
  font-family: "Clash Display";
  src: url("assets/fonts/clash-display-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Clash Display";
  src: url("assets/fonts/clash-display-500.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Clash Display";
  src: url("assets/fonts/clash-display-600.woff2") format("woff2");
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Mono";
  src: url("assets/fonts/ibm-plex-mono-400.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "IBM Plex Mono";
  src: url("assets/fonts/ibm-plex-mono-500.woff2") format("woff2");
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

/* ── Palette ─────────────────────────────────────────────────────────────── */

:root {
  /* Surfaces */
  --color-paper: oklch(13.5% 0.014 275);
  --color-paper-2: oklch(17.5% 0.016 275);
  --color-paper-3: oklch(21.5% 0.018 275);
  --color-paper-ink: oklch(16% 0.020 275);

  /* Text */
  --color-ink: oklch(95.5% 0.008 275);
  --color-ink-2: oklch(78% 0.012 275);
  --color-neutral: oklch(62% 0.014 275);

  /* Lines */
  --color-rule: oklch(30% 0.016 275);
  --color-rule-2: oklch(24% 0.014 275);

  /* Accent — one at a time; follows the selected space */
  --color-space-indigo: oklch(66% 0.19 275);
  --color-space-sky: oklch(68% 0.17 250);
  --color-space-emerald: oklch(72% 0.16 160);
  --color-space-amber: oklch(80% 0.14 80);
  --color-space-cyan: oklch(78% 0.13 210);
  --color-space-purple: oklch(64% 0.20 305);
  --color-space-pink: oklch(70% 0.18 350);

  --color-accent: var(--color-space-indigo);
  --color-accent-ink: oklch(13.5% 0.014 275);
  --color-focus: oklch(75% 0.20 275);

  /* Type */
  --font-display: "Clash Display", "PingFang SC", "Hiragino Sans GB",
    "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC",
    "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Menlo, Consolas, monospace;
  --font-wordmark: "Clash Display", "PingFang SC", "Hiragino Sans GB",
    "Noto Sans SC", "Microsoft YaHei", sans-serif;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-md: 1.125rem;
  --text-lg: 1.375rem;
  --text-xl: 1.75rem;
  --text-2xl: 2.25rem;
  --text-3xl: 2.875rem;
  --text-display: clamp(2.25rem, 4.2vw + 1rem, 4.5rem);
  --text-display-s: clamp(1.75rem, 3vw + 0.75rem, 3.25rem);

  --leading-tight: 1.06;
  --leading-snug: 1.3;
  --leading-body: 1.72;

  /* Space — 4pt scale */
  --space-3xs: 0.125rem;
  --space-2xs: 0.25rem;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.5rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  --space-4xl: 9rem;

  /* Layout */
  --container: 1180px;
  --gutter: clamp(1.25rem, 5vw, 4rem);
  --measure: 68ch;

  /* Corners */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;

  /* Motion */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in: cubic-bezier(0.7, 0, 0.84, 0);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --dur-micro: 120ms;
  --dur-short: 220ms;
  --dur-long: 420ms;
  --dur-spin: 90s;

  /* Depth — weight, not glow */
  --shadow-hair: 0 0 0 1px oklch(30% 0.016 275 / 0.06);
  --shadow-pill: 0 12px 40px -24px oklch(0% 0 0 / 0.6);

  /* Ambient & noise */
  --ambient-mix-1: 17%;
  --ambient-mix-2: 10%;
  --noise-opacity: 0.018;

  /* Stacking */
  --z-base: 1;
  --z-raised: 10;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-modal: 400;
}

/* ── Light Mode Palette ──────────────────────────────────────────────────── */

:root[data-theme="light"] {
  /* Surfaces */
  --color-paper: oklch(98.5% 0.004 275);
  --color-paper-2: oklch(95.5% 0.006 275);
  --color-paper-3: oklch(92% 0.009 275);
  --color-paper-ink: oklch(98.5% 0.004 275);

  /* Text */
  --color-ink: oklch(18% 0.018 275);
  --color-ink-2: oklch(38% 0.018 275);
  --color-neutral: oklch(54% 0.016 275);

  /* Lines */
  --color-rule: oklch(86% 0.010 275);
  --color-rule-2: oklch(91% 0.007 275);

  /* Accent — tuned for WCAG AA (≥4.5:1) on light surfaces */
  --color-space-indigo: oklch(53% 0.22 275);
  --color-space-sky: oklch(52% 0.18 250);
  --color-space-emerald: oklch(48% 0.16 160);
  --color-space-amber: oklch(56% 0.16 70);
  --color-space-cyan: oklch(48% 0.14 210);
  --color-space-purple: oklch(51% 0.22 305);
  --color-space-pink: oklch(53% 0.20 350);

  --color-accent-ink: oklch(99% 0.002 275);
  --color-focus: oklch(52% 0.22 275);

  /* Depth */
  --shadow-hair: 0 0 0 1px oklch(20% 0.02 275 / 0.08);
  --shadow-pill: 0 10px 32px -10px oklch(20% 0.03 275 / 0.12), 0 2px 6px -1px oklch(20% 0.03 275 / 0.06);

  /* Ambient & noise */
  --ambient-mix-1: 9%;
  --ambient-mix-2: 6%;
  --noise-opacity: 0.012;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    /* Surfaces */
    --color-paper: oklch(98.5% 0.004 275);
    --color-paper-2: oklch(95.5% 0.006 275);
    --color-paper-3: oklch(92% 0.009 275);
    --color-paper-ink: oklch(98.5% 0.004 275);

    /* Text */
    --color-ink: oklch(18% 0.018 275);
    --color-ink-2: oklch(38% 0.018 275);
    --color-neutral: oklch(54% 0.016 275);

    /* Lines */
    --color-rule: oklch(86% 0.010 275);
    --color-rule-2: oklch(91% 0.007 275);

    /* Accent — tuned for WCAG AA (≥4.5:1) on light surfaces */
    --color-space-indigo: oklch(53% 0.22 275);
    --color-space-sky: oklch(52% 0.18 250);
    --color-space-emerald: oklch(48% 0.16 160);
    --color-space-amber: oklch(56% 0.16 70);
    --color-space-cyan: oklch(48% 0.14 210);
    --color-space-purple: oklch(51% 0.22 305);
    --color-space-pink: oklch(53% 0.20 350);

    --color-accent-ink: oklch(99% 0.002 275);
    --color-focus: oklch(52% 0.22 275);

    /* Depth */
    --shadow-hair: 0 0 0 1px oklch(20% 0.02 275 / 0.08);
    --shadow-pill: 0 10px 32px -10px oklch(20% 0.03 275 / 0.12), 0 2px 6px -1px oklch(20% 0.03 275 / 0.06);

    /* Ambient & noise */
    --ambient-mix-1: 9%;
    --ambient-mix-2: 6%;
    --noise-opacity: 0.012;
  }
}

:root[data-theme="dark"] {
  /* Surfaces */
  --color-paper: oklch(13.5% 0.014 275);
  --color-paper-2: oklch(17.5% 0.016 275);
  --color-paper-3: oklch(21.5% 0.018 275);
  --color-paper-ink: oklch(16% 0.020 275);

  /* Text */
  --color-ink: oklch(95.5% 0.008 275);
  --color-ink-2: oklch(78% 0.012 275);
  --color-neutral: oklch(62% 0.014 275);

  /* Lines */
  --color-rule: oklch(30% 0.016 275);
  --color-rule-2: oklch(24% 0.014 275);

  /* Accent */
  --color-space-indigo: oklch(66% 0.19 275);
  --color-space-sky: oklch(68% 0.17 250);
  --color-space-emerald: oklch(72% 0.16 160);
  --color-space-amber: oklch(80% 0.14 80);
  --color-space-cyan: oklch(78% 0.13 210);
  --color-space-purple: oklch(64% 0.20 305);
  --color-space-pink: oklch(70% 0.18 350);

  --color-accent-ink: oklch(13.5% 0.014 275);
  --color-focus: oklch(75% 0.20 275);

  /* Depth */
  --shadow-hair: 0 0 0 1px oklch(30% 0.016 275 / 0.06);
  --shadow-pill: 0 12px 40px -24px oklch(0% 0 0 / 0.6);

  /* Ambient & noise */
  --ambient-mix-1: 17%;
  --ambient-mix-2: 10%;
  --noise-opacity: 0.018;
}

/* ── Selected space → site accent ───────────────────────────────────────── */

body[data-space="daily"] { --color-accent: var(--color-space-indigo); }
body[data-space="work"] { --color-accent: var(--color-space-sky); }
body[data-space="study"] { --color-accent: var(--color-space-emerald); }
body[data-space="media"] { --color-accent: var(--color-space-amber); }
body[data-space="explore"] { --color-accent: var(--color-space-cyan); }
body[data-space="private"] { --color-accent: var(--color-space-purple); }
body[data-space="vault"] { --color-accent: var(--color-space-pink); }