/* ================================================================
   Simon · MINDS — Policies site
   Editorial / minimal · system fonts · ink+paper palette
   ================================================================ */

:root {
  /* Palette: warm parchment + ink-blue accent */
  --color-paper:   oklch(98.5% 0.005 85);
  --color-paper-2: oklch(96%  0.008 85);
  --color-ink:     oklch(20%  0.015 270);
  --color-ink-2:   oklch(38%  0.015 270);
  --color-ink-3:   oklch(58%  0.012 270);
  --color-rule:    oklch(88%  0.008 85);
  --color-accent:  oklch(46%  0.14  245);
  --color-accent-2: oklch(60% 0.12  245);

  /* Typography */
  --font-serif:  ui-serif, "Iowan Old Style", "Apple Garamond", "Times New Roman", "Songti TC", "Noto Serif TC", serif;
  --font-sans:   -apple-system, BlinkMacSystemFont, "Inter", "Helvetica Neue", "PingFang TC", "Noto Sans TC", sans-serif;
  --font-mono:   ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --text-base: clamp(0.96rem, 0.9rem + 0.3vw, 1.06rem);
  --text-h1:   clamp(2.4rem, 1.8rem + 3vw, 4rem);
  --text-h2:   clamp(1.4rem, 1.15rem + 0.9vw, 1.85rem);
  --text-h3:   clamp(1.1rem, 1rem + 0.4vw, 1.32rem);

  --space-section: clamp(3rem, 2.5rem + 3vw, 6rem);
  --space-block:   clamp(1.25rem, 1rem + 1vw, 2rem);
  --space-line:    1.05em;

  --radius: 4px;

  --duration-fast: 150ms;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-paper:   oklch(15% 0.012 270);
    --color-paper-2: oklch(20% 0.014 270);
    --color-ink:     oklch(95% 0.008 85);
    --color-ink-2:   oklch(80% 0.01  85);
    --color-ink-3:   oklch(60% 0.01  85);
    --color-rule:    oklch(28% 0.012 270);
    --color-accent:  oklch(75% 0.13  245);
    --color-accent-2: oklch(65% 0.12  245);
  }
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--color-ink);
  background: var(--color-paper);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

/* ──────────────  layout  ────────────── */
.page {
  max-width: 760px;
  margin: 0 auto;
  padding: var(--space-section) clamp(1.25rem, 4vw, 2.5rem);
}

.page--doc {
  max-width: 720px;
}

/* ──────────────  hero (index)  ────────────── */
.kicker {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-ink-3);
  margin-bottom: 1.25rem;
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: var(--text-h1);
  line-height: 1.05;
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--color-ink);
  margin-bottom: 1.5rem;
}

.hero__sub {
  font-style: italic;
  font-size: 0.55em;
  color: var(--color-ink-2);
  font-weight: 400;
  letter-spacing: 0;
}

.lede {
  font-family: var(--font-serif);
  font-size: 1.18rem;
  line-height: 1.55;
  color: var(--color-ink-2);
  max-width: 60ch;
  margin-bottom: 1rem;
}

.lede--en {
  font-size: 1.05rem;
  color: var(--color-ink-3);
  font-style: italic;
}

/* ──────────────  cards  ────────────── */
.docs {
  margin-top: var(--space-section);
  display: grid;
  gap: 0;
  border-top: 1px solid var(--color-rule);
}

.card {
  display: grid;
  grid-template-columns: 4rem 1fr;
  grid-template-areas:
    "num title"
    "num desc"
    "num desc-en";
  column-gap: 1.25rem;
  row-gap: 0.4rem;
  align-items: start;
  padding: 2rem 0;
  border-bottom: 1px solid var(--color-rule);
  text-decoration: none;
  color: inherit;
  transition: transform var(--duration-fast) var(--ease-out),
              padding var(--duration-fast) var(--ease-out);
}

.card__num    { grid-area: num; }
.card__title  { grid-area: title; }
.card__desc   { grid-area: desc; }
.card__desc--en { grid-area: desc-en; }

.card:hover,
.card:focus-visible {
  outline: none;
  padding-left: 0.5rem;
  padding-right: 0.5rem;
  background: var(--color-paper-2);
}

.card:hover .card__num,
.card:focus-visible .card__num {
  color: var(--color-accent);
}

.card__num {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0.05em;
  color: var(--color-ink-3);
  padding-top: 0.4rem;
  transition: color var(--duration-fast) var(--ease-out);
}

.card__title {
  font-family: var(--font-serif);
  font-size: var(--text-h2);
  line-height: 1.18;
  font-weight: 400;
  letter-spacing: -0.01em;
  margin-bottom: 0.6rem;
}

.card__title--en {
  font-style: italic;
  font-size: 0.7em;
  color: var(--color-ink-3);
  font-weight: 400;
}

.card__desc {
  font-size: 0.95rem;
  color: var(--color-ink-2);
  margin-bottom: 0.3rem;
  max-width: 52ch;
}

.card__desc--en {
  font-style: italic;
  color: var(--color-ink-3);
  font-size: 0.88rem;
}

/* ──────────────  doc layout  ────────────── */
.topnav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding-bottom: 1.25rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--color-rule);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.05em;
}

.topnav__home {
  color: var(--color-ink-2);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

.topnav__home:hover { color: var(--color-accent); }

.topnav__lang {
  list-style: none;
  padding: 0;
  display: flex;
  gap: 1.25rem;
}

.topnav__lang a {
  color: var(--color-ink-3);
  text-decoration: none;
  border-bottom: 1px dotted var(--color-rule);
  padding-bottom: 1px;
  transition: color var(--duration-fast) var(--ease-out),
              border-color var(--duration-fast) var(--ease-out);
}

.topnav__lang a:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.doc__head {
  margin-bottom: var(--space-section);
}

.doc__title {
  font-family: var(--font-serif);
  font-size: var(--text-h1);
  line-height: 1.05;
  font-weight: 400;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

.doc__title--en {
  font-style: italic;
  font-size: 0.55em;
  color: var(--color-ink-2);
  font-weight: 400;
  letter-spacing: 0;
}

.doc__meta {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--color-ink-3);
  line-height: 1.7;
}

.doc__body {
  margin-bottom: var(--space-section);
}

.doc__body + .doc__body {
  border-top: 1px solid var(--color-rule);
  padding-top: var(--space-section);
}

.doc__body h2 {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 2rem;
  font-weight: 500;
}

.doc__body h3 {
  font-family: var(--font-serif);
  font-size: var(--text-h3);
  font-weight: 500;
  letter-spacing: -0.005em;
  color: var(--color-ink);
  margin-top: 2.4rem;
  margin-bottom: 0.8rem;
}

.doc__body p,
.doc__body ul,
.doc__body ol {
  margin-bottom: var(--space-line);
  max-width: 62ch;
}

.doc__body ul,
.doc__body ol {
  padding-left: 1.5em;
}

.doc__body li {
  margin-bottom: 0.4em;
}

.doc__body li::marker {
  color: var(--color-ink-3);
}

.doc__body a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid var(--color-rule);
  transition: border-color var(--duration-fast) var(--ease-out),
              color var(--duration-fast) var(--ease-out);
}

.doc__body a:hover {
  color: var(--color-accent-2);
  border-color: var(--color-accent);
}

.doc__body strong {
  font-weight: 600;
  color: var(--color-ink);
}

.doc__body em {
  color: var(--color-accent-2);
  font-style: italic;
}

.doc__body code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--color-paper-2);
  padding: 0.1em 0.4em;
  border-radius: var(--radius);
  color: var(--color-ink);
}

/* ──────────────  table  ────────────── */
.doc__body table {
  width: 100%;
  max-width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.92rem;
  display: block;
  overflow-x: auto;
}

.doc__body table thead {
  background: var(--color-paper-2);
}

.doc__body table th,
.doc__body table td {
  padding: 0.7em 1em;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--color-rule);
}

.doc__body table th {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-3);
  font-weight: 500;
  white-space: nowrap;
}

.doc__body table td {
  color: var(--color-ink-2);
}

/* ──────────────  footer  ────────────── */
.foot {
  margin-top: var(--space-section);
  padding-top: 2rem;
  border-top: 1px solid var(--color-rule);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--color-ink-3);
  line-height: 1.9;
}

.foot__line a {
  color: var(--color-ink-2);
  text-decoration: none;
  border-bottom: 1px dotted var(--color-rule);
  transition: color var(--duration-fast) var(--ease-out);
}

.foot__line a:hover { color: var(--color-accent); }

.foot__line--meta {
  margin-top: 0.5rem;
  color: var(--color-ink-3);
  font-style: italic;
}

/* ──────────────  motion  ────────────── */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}

/* ──────────────  small screens fine-tune  ────────────── */
@media (max-width: 540px) {
  .card {
    grid-template-columns: 1fr;
    grid-template-areas:
      "num"
      "title"
      "desc"
      "desc-en";
    row-gap: 0.5rem;
  }
  .card__num { padding-top: 0; }
  .doc__body table {
    font-size: 0.85rem;
  }
  .doc__body table th,
  .doc__body table td {
    padding: 0.5em 0.7em;
  }
}