@layer reset, tokens, base, layout, components, utility;

@layer reset {
  *, *::before, *::after { box-sizing: border-box; margin: 0; }
  img, picture, video { display: block; max-width: 100%; }
  input, button, textarea, select { font: inherit; }
}

@layer tokens {
  :root {
    color-scheme: light;
    --bg: #fafafa;
    --surface: #ffffff;
    --fg: #1a1a1a;
    --muted: #6b7280;
    --line: #e5e7eb;
    --line-soft: #f0f1f3;
    --pri: oklch(58% 0.18 250);
    --pri-soft: color-mix(in oklch, var(--pri), white 86%);
    --ok: oklch(60% 0.16 150);
    --ok-soft: color-mix(in oklch, var(--ok), white 84%);
    --warn: oklch(70% 0.15 60);
    --code-bg: #f5f5f7;
    --radius: 0.625rem;
    --radius-sm: 0.375rem;
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 1rem;
    --space-4: 1.5rem;
    --space-5: 2.5rem;
    --font-sans: -apple-system, BlinkMacSystemFont, "Pretendard", "Apple SD Gothic Neo", sans-serif;
    --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --shadow: 0 4px 14px rgba(0,0,0,0.06);
  }
}

@layer base {
  html { scroll-behavior: smooth; }
  body {
    font-family: var(--font-sans);
    line-height: 1.6;
    background: var(--bg);
    color: var(--fg);
    -webkit-font-smoothing: antialiased;
    padding-block-end: var(--space-5);
  }
  h1, h2, h3 { line-height: 1.25; letter-spacing: -0.01em; }
  h1 { font-size: clamp(1.75rem, 2.5vw + 1rem, 2.5rem); font-weight: 700; }
  h2 { font-size: 1.25rem; font-weight: 650; margin-block-end: var(--space-3); }
  h3 { font-size: 1rem; font-weight: 600; margin-block: var(--space-3) var(--space-2); }
  a { color: var(--pri); text-underline-offset: 3px; }
  a:hover { color: color-mix(in oklch, var(--pri), black 15%); }
  code {
    font-family: var(--font-mono);
    font-size: 0.86em;
    background: var(--code-bg);
    padding: 0.1em 0.4em;
    border-radius: var(--radius-sm);
    color: #2d3142;
  }
  pre {
    background: #0f172a;
    color: #cbd5e1;
    padding: var(--space-3);
    border-radius: var(--radius);
    overflow-x: auto;
    font-size: 0.85rem;
    line-height: 1.55;
  }
  pre code {
    background: transparent;
    color: inherit;
    padding: 0;
    font-size: inherit;
  }
  ul { padding-inline-start: 1.25rem; }
  li { margin-block: var(--space-1); }
}

@layer layout {
  main {
    max-width: 56rem;
    margin-inline: auto;
    padding-inline: var(--space-3);
    display: grid;
    gap: var(--space-3);
  }
  .page-header {
    max-width: 56rem;
    margin-inline: auto;
    padding: var(--space-5) var(--space-3) var(--space-4);
  }
  footer {
    max-width: 56rem;
    margin-inline: auto;
    padding: var(--space-4) var(--space-3) 0;
    color: var(--muted);
    font-size: 0.85rem;
    border-top: 1px solid var(--line-soft);
    margin-top: var(--space-4);
  }
}

@layer components {
  .eyebrow {
    text-transform: uppercase;
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    color: var(--muted);
    font-weight: 600;
  }
  .subtitle {
    color: var(--muted);
    margin-block-start: var(--space-2);
    font-size: 1.02rem;
  }
  .live-link {
    margin-block-start: var(--space-3);
    font-family: var(--font-mono);
    font-size: 0.9rem;
  }
  .live-link a {
    display: inline-block;
    padding: var(--space-2) var(--space-3);
    background: var(--pri-soft);
    border-radius: var(--radius);
    text-decoration: none;
    font-weight: 500;
  }
  .card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: var(--space-4);
    box-shadow: var(--shadow-sm);
  }
  .card:hover { box-shadow: var(--shadow); transition: box-shadow 0.2s; }
  .hint {
    color: var(--muted);
    font-size: 0.9rem;
    margin-block-end: var(--space-3);
  }
  table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
  }
  th, td {
    text-align: start;
    padding: var(--space-2) var(--space-3);
    border-block-end: 1px solid var(--line-soft);
    vertical-align: top;
  }
  thead th {
    background: var(--code-bg);
    font-weight: 600;
    color: var(--muted);
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
  }
  /* key-value 2열 표 (thead 없음) */
  .card > table:not(.data-table) th {
    width: 14rem;
    font-weight: 500;
    color: var(--muted);
    background: transparent;
  }
  tbody tr:last-child th,
  tbody tr:last-child td {
    border-block-end: none;
  }
  .badge {
    display: inline-block;
    padding: 0.1rem 0.55rem;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.02em;
  }
  .badge.ok { background: var(--ok-soft); color: color-mix(in oklch, var(--ok), black 25%); }
  .badge.muted { background: var(--line-soft); color: var(--muted); }
  .check-list {
    list-style: none;
    padding: 0;
    display: grid;
    gap: var(--space-2);
  }
  .check-list li {
    padding-inline-start: 1.5rem;
    position: relative;
    line-height: 1.65;
  }
  .check-list li::before {
    content: "▸";
    position: absolute;
    inset-inline-start: 0;
    color: var(--pri);
    font-weight: 700;
  }
  .check-list b {
    font-weight: 650;
    color: var(--fg);
  }
}

@layer utility {
  @container (max-width: 30rem) {
    .card > table:not(.data-table) th { width: auto; }
  }
}

@media (max-width: 640px) {
  th, td { padding: var(--space-2); font-size: 0.86rem; }
  .card { padding: var(--space-3); }
  pre { font-size: 0.78rem; }
  .card > table:not(.data-table) th { width: 10rem; }
}