/* ── 醫治泉源 Fount of Healing — design tokens & reset ─────────────── */

:root {
  /* Type scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radius, motion, widths */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.625rem;
  --radius-full: 9999px;
  --transition-interactive: 200ms cubic-bezier(0.16, 1, 0.3, 1);
  --content-narrow: 640px;
  --content-reading: 780px;
  --content-default: 1040px;
  --content-wide: 1280px;

  /* Fonts */
  --font-display: 'Cormorant Garamond', 'Noto Serif TC', Georgia, serif;
  --font-body: 'Spectral', 'Noto Serif TC', Georgia, serif;
  --font-ui: 'Inter', 'Noto Sans TC', system-ui, sans-serif;
}

/* ── Light: parchment & ink blue ─────────────────────────────────── */
:root,
[data-theme='light'] {
  --color-bg: #f5f2ea;
  --color-surface: #fbf9f3;
  --color-surface-2: #fdfcf8;
  --color-surface-offset: #ede8db;
  --color-surface-offset-2: #e5dece;
  --color-divider: #ddd6c5;
  --color-border: #cec5b1;

  --color-text: #15203a;
  --color-text-muted: #57607a;
  --color-text-faint: #8d94a6;
  --color-text-inverse: #f5f2ea;

  --color-primary: #1d2f5c;
  --color-primary-hover: #14213f;
  --color-primary-soft: #e3e2e6;

  --color-accent: #8c6a1e;
  --color-accent-hover: #6f5314;
  --color-accent-soft: #ece2c9;

  --color-deep: #101a30;

  --shadow-sm: 0 1px 2px rgb(21 32 58 / 0.06);
  --shadow-md: 0 6px 20px rgb(21 32 58 / 0.08);
  --shadow-lg: 0 18px 48px rgb(21 32 58 / 0.13);
  --hero-veil: linear-gradient(180deg, rgb(10 16 30 / 0.62) 0%, rgb(10 16 30 / 0.5) 45%, rgb(10 16 30 / 0.78) 100%);
}

/* ── Dark: midnight blue & antique gold ─────────────────────────── */
[data-theme='dark'] {
  --color-bg: #0a1020;
  --color-surface: #0f1730;
  --color-surface-2: #131d38;
  --color-surface-offset: #0d1428;
  --color-surface-offset-2: #16203c;
  --color-divider: #1a2440;
  --color-border: #26314f;

  --color-text: #e7e1d3;
  --color-text-muted: #9ba4bc;
  --color-text-faint: #6b7490;
  --color-text-inverse: #0a1020;

  --color-primary: #cbb075;
  --color-primary-hover: #ddc48e;
  --color-primary-soft: #1b2440;

  --color-accent: #cbab61;
  --color-accent-hover: #e0c383;
  --color-accent-soft: #1d2542;

  --color-deep: #060b16;

  --shadow-sm: 0 1px 2px rgb(0 0 0 / 0.4);
  --shadow-md: 0 6px 20px rgb(0 0 0 / 0.45);
  --shadow-lg: 0 18px 48px rgb(0 0 0 / 0.55);
  --hero-veil: linear-gradient(180deg, rgb(6 11 22 / 0.62) 0%, rgb(6 11 22 / 0.55) 45%, rgb(6 11 22 / 0.9) 100%);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg: #0a1020;
    --color-surface: #0f1730;
    --color-surface-2: #131d38;
    --color-surface-offset: #0d1428;
    --color-surface-offset-2: #16203c;
    --color-divider: #1a2440;
    --color-border: #26314f;
    --color-text: #e7e1d3;
    --color-text-muted: #9ba4bc;
    --color-text-faint: #6b7490;
    --color-text-inverse: #0a1020;
    --color-primary: #cbb075;
    --color-primary-hover: #ddc48e;
    --color-primary-soft: #1b2440;
    --color-accent: #cbab61;
    --color-accent-hover: #e0c383;
    --color-accent-soft: #1d2542;
    --color-deep: #060b16;
  }
}

/* ── Reset ──────────────────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
}

body {
  min-height: 100dvh;
  line-height: 1.7;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  transition:
    background-color 400ms ease,
    color 400ms ease;
}

img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

ul[role='list'],
ol[role='list'] {
  list-style: none;
}

input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  background: none;
  border: none;
}

h1,
h2,
h3,
h4 {
  text-wrap: balance;
  line-height: 1.2;
  font-weight: 500;
}

p,
li,
figcaption {
  text-wrap: pretty;
}

a {
  color: inherit;
}

::selection {
  background: var(--color-accent-soft);
  color: var(--color-text);
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

a,
button,
[role='button'],
input,
textarea,
select,
summary {
  transition:
    color var(--transition-interactive),
    background-color var(--transition-interactive),
    border-color var(--transition-interactive),
    opacity var(--transition-interactive),
    box-shadow var(--transition-interactive);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}