/* Hallmark · tokens · theme: School Notebook Commons · offline system stack */
:root {
  --color-paper: oklch(97.5% 0.018 88);
  --color-paper-2: oklch(94.5% 0.025 88);
  --color-paper-3: oklch(90.5% 0.035 88);
  --color-surface: oklch(99.2% 0.008 88);
  --color-ink: oklch(23% 0.052 252);
  --color-ink-2: oklch(34% 0.048 252);
  --color-muted: oklch(46% 0.035 252);
  --color-rule: oklch(78% 0.032 88);
  --color-rule-dark: oklch(48% 0.04 252);
  --color-accent: oklch(52% 0.165 250);
  --color-accent-soft: oklch(92.5% 0.045 245);
  --color-accent-ink: oklch(99% 0.006 88);
  --color-on-dark: oklch(98% 0.012 88);
  --color-on-dark-muted: oklch(84% 0.025 252);
  --color-focus: oklch(56% 0.19 250);
  --color-accent-deep: oklch(39% 0.145 250);
  --color-joy: oklch(86% 0.12 92);
  --color-joy-soft: oklch(96% 0.04 92);
  --color-sky: oklch(73% 0.105 230);
  --color-sky-soft: oklch(95% 0.035 230);
  --color-coral: oklch(64% 0.15 30);
  --color-coral-soft: oklch(95% 0.04 30);
  --color-mint: oklch(72% 0.095 158);
  --color-mint-soft: oklch(95% 0.035 158);
  --color-pencil: oklch(54% 0.17 28);
  --color-pencil-soft: oklch(94% 0.045 28);
  --color-note: oklch(83% 0.11 92);
  --color-note-soft: oklch(96% 0.045 92);
  --color-error: oklch(52% 0.18 25);
  --color-success: oklch(47% 0.11 148);
  --color-image-shade: oklch(18% 0.035 252 / 0.1);
  --color-math: oklch(52% 0.165 250);
  --color-math-soft: oklch(92.5% 0.045 245);
  --color-english: oklch(57% 0.145 28);
  --color-english-soft: oklch(94% 0.045 28);
  --color-japanese: oklch(50% 0.11 150);
  --color-japanese-soft: oklch(93.5% 0.045 150);
  --color-science: oklch(50% 0.105 188);
  --color-science-soft: oklch(93.5% 0.04 188);
  --color-social: oklch(58% 0.12 78);
  --color-social-soft: oklch(94.5% 0.05 78);
  --color-life: oklch(59% 0.13 92);
  --color-life-soft: oklch(95% 0.05 92);

  --font-display: "UD Digi Kyokasho NK-B", "UD デジタル 教科書体 NK-B", "BIZ UDPGothic", sans-serif;
  --font-body: "Yu Gothic UI", "Yu Gothic", "Hiragino Kaku Gothic ProN", "BIZ UDPGothic", Meiryo, sans-serif;
  --font-mono: "Yu Gothic UI", "Yu Gothic", "Hiragino Kaku Gothic ProN", "BIZ UDPGothic", Meiryo, sans-serif;

  --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: 8rem;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-md: 1.25rem;
  --text-lg: 1.563rem;
  --text-xl: 1.953rem;
  --text-2xl: 2.441rem;
  --text-3xl: 3.052rem;
  --text-display: clamp(2.75rem, 5vw + 1rem, 5.25rem);
  --text-display-small: clamp(2.35rem, 6vw, 4.8rem);

  --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-reveal: 600ms;

  --rule-hair: 1px;
  --rule-heavy: 2px;
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-card: 0.75rem;
  --radius-input: 0.5rem;
  --radius-pill: 1.5rem;
  --shadow-image: 0 1.5rem 4rem oklch(23% 0.052 252 / 0.16);
  --shadow-soft: 0 0.5rem 1.5rem oklch(23% 0.052 252 / 0.09);
  --z-skip: 40;
}