@layer reset, tokens, base, components, utilities;

@layer reset {
  *, *::before, *::after { box-sizing: border-box; }
  body, h1, h2, h3, h4, p, ul, ol, figure, blockquote, dl, dd { margin: 0; }
  ul[role="list"], ol[role="list"] { list-style: none; padding: 0; }
  html { -webkit-text-size-adjust: 100%; }
  img, picture { max-width: 100%; display: block; }
  input, button, textarea, select { font: inherit; }
  table { border-collapse: collapse; width: 100%; }
}

@layer tokens {
  :root {
    color-scheme: light;
    --bg: #f7f8fb;
    --surface: #ffffff;
    --surface-2: #f1f3f8;
    --border: #e2e6ee;
    --border-strong: #c9d0dc;
    --text: #1a1d24;
    --text-muted: #5b6373;
    --text-faint: #8a93a5;
    --accent: #2f5bea;
    --accent-soft: #e7eeff;
    --gold: #c89a2b;
    --silver: #6c7480;
    --bronze: #a86b2e;
    --good: #1f8a4f;
    --bad: #c8324a;
    --code-bg: #f3f4f8;
    --radius: 14px;
    --radius-sm: 8px;
    --shadow-sm: 0 1px 2px rgba(20, 30, 60, 0.04), 0 2px 6px rgba(20, 30, 60, 0.04);
    --shadow-md: 0 4px 16px rgba(20, 30, 60, 0.06);
    --font-sans: ui-sans-serif, system-ui, -apple-system, "Apple SD Gothic Neo",
                 "Pretendard", "Noto Sans KR", sans-serif;
    --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, monospace;
    --measure: 76ch;
  }
}

@layer base {
  html { font-family: var(--font-sans); line-height: 1.65; color: var(--text); }
  body {
    background: var(--bg);
    font-size: 16px;
    padding: clamp(1rem, 3vw, 2.5rem) 0;
  }
  main { max-width: 1080px; margin-inline: auto; padding-inline: clamp(1rem, 4vw, 2rem); }
  h1 { font-size: clamp(1.6rem, 3.2vw, 2.2rem); line-height: 1.25; letter-spacing: -0.02em; }
  h2 { font-size: clamp(1.25rem, 2.2vw, 1.55rem); line-height: 1.3; margin-block-start: 2.5rem; letter-spacing: -0.01em; }
  h3 { font-size: 1.1rem; margin-block-start: 1.4rem; letter-spacing: -0.005em; }
  p { max-width: var(--measure); }
  a { color: var(--accent); text-underline-offset: 3px; }
  strong { font-weight: 600; }
  code, pre { font-family: var(--font-mono); }
  code { background: var(--code-bg); padding: 0.1em 0.4em; border-radius: 4px; font-size: 0.92em; }
}

@layer components {
  .hero {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: clamp(1.25rem, 3vw, 2rem);
    box-shadow: var(--shadow-sm);
  }
  .hero .meta {
    color: var(--text-muted);
    font-size: 0.92rem;
    margin-block-start: 0.6rem;
  }
  .lede { color: var(--text-muted); margin-block-start: 0.6rem; }

  .summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 0.75rem;
    margin-block-start: 1.2rem;
  }
  .summary-grid .card {
    background: var(--surface-2);
    border-radius: var(--radius-sm);
    padding: 0.85rem 1rem;
    border: 1px solid var(--border);
  }
  .summary-grid .label { font-size: 0.78rem; color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.05em; }
  .summary-grid .value { font-size: 1rem; font-weight: 600; margin-block-start: 0.2rem; }

  section.block {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: clamp(1.25rem, 3vw, 1.75rem);
    margin-block-start: 1.25rem;
    box-shadow: var(--shadow-sm);
  }

  table {
    font-variant-numeric: tabular-nums;
    font-size: 0.95rem;
  }
  thead th {
    text-align: left;
    background: var(--surface-2);
    color: var(--text-muted);
    font-weight: 600;
    padding: 0.6rem 0.75rem;
    border-block-end: 1px solid var(--border-strong);
    font-size: 0.85rem;
  }
  tbody td {
    padding: 0.65rem 0.75rem;
    border-block-end: 1px solid var(--border);
    vertical-align: top;
  }
  tbody tr:last-child td { border-block-end: none; }
  td.num, th.num { text-align: right; }
  td.rank-1 { font-weight: 700; color: var(--gold); }
  td.rank-2 { font-weight: 600; color: var(--silver); }
  td.rank-3 { font-weight: 600; color: var(--bronze); }

  .options-stack { display: grid; gap: 1rem; margin-block-start: 1rem; }
  .option-card {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.1rem 1.25rem;
    background: var(--surface);
  }
  .option-card.winner { border-color: var(--accent); background: linear-gradient(180deg, var(--accent-soft), var(--surface) 40%); }
  .option-card header {
    display: flex; justify-content: space-between; align-items: baseline; gap: 1rem;
    margin-block-end: 0.4rem;
  }
  .option-card h3 { margin: 0; }
  .option-card .score-pill {
    background: var(--surface-2);
    color: var(--text);
    border: 1px solid var(--border-strong);
    border-radius: 999px;
    padding: 0.15rem 0.7rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    font-size: 0.9rem;
    white-space: nowrap;
  }
  .option-card.winner .score-pill { background: var(--accent); color: white; border-color: var(--accent); }
  .option-card .tagline { color: var(--text-muted); font-size: 0.92rem; }

  .pros-cons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 0.75rem;
    margin-block-start: 0.8rem;
  }
  .pros-cons div {
    background: var(--surface-2);
    border-radius: var(--radius-sm);
    padding: 0.65rem 0.85rem;
    border: 1px solid var(--border);
  }
  .pros-cons h4 { font-size: 0.85rem; margin-block-end: 0.35rem; text-transform: uppercase; letter-spacing: 0.04em; }
  .pros h4 { color: var(--good); }
  .cons h4 { color: var(--bad); }
  .why h4 { color: var(--accent); }
  .pros-cons ul { padding-inline-start: 1.1rem; margin: 0; font-size: 0.92rem; }
  .pros-cons li { margin-block-end: 0.2rem; }

  details {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.6rem 0.9rem;
    background: var(--surface-2);
    margin-block-start: 0.6rem;
  }
  details summary { cursor: pointer; font-weight: 600; }
  details[open] { background: var(--surface); }
  details .score-table { margin-block-start: 0.7rem; }

  .setup-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 0.85rem; margin-block-start: 0.8rem;
  }
  .setup-card {
    background: var(--surface-2);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    padding: 0.95rem 1.05rem;
  }
  .setup-card h3 { margin-block-start: 0; font-size: 1rem; }
  .setup-card ol { padding-inline-start: 1.2rem; font-size: 0.93rem; }
  .setup-card li { margin-block-end: 0.25rem; }
  .setup-card code { display: inline-block; }

  .scenario-list { display: grid; gap: 0.6rem; margin-block-start: 0.8rem; }
  .scenario-list .row {
    display: grid; grid-template-columns: minmax(180px, 220px) 1fr;
    gap: 1rem; padding: 0.6rem 0.85rem;
    background: var(--surface-2);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
  }
  .scenario-list .who { font-weight: 600; color: var(--accent); }

  .sources { font-size: 0.9rem; color: var(--text-muted); }
  .sources ol { padding-inline-start: 1.4rem; }
  .sources li { margin-block-end: 0.25rem; word-break: break-word; }

  footer.foot {
    color: var(--text-faint);
    font-size: 0.85rem;
    text-align: center;
    margin-block-start: 2rem;
  }
}

@layer utilities {
  .stack > * + * { margin-block-start: 0.6rem; }
  .row-tight { display: flex; gap: 0.5rem; flex-wrap: wrap; }
  .badge {
    display: inline-block;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 0.1rem 0.6rem;
    font-size: 0.78rem;
    color: var(--text-muted);
  }
  .badge.accent { background: var(--accent-soft); color: var(--accent); border-color: var(--accent-soft); }
}

@container (max-width: 480px) {
  .pros-cons { grid-template-columns: 1fr; }
  .scenario-list .row { grid-template-columns: 1fr; }
}