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

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

@layer tokens {
  :root {
    color-scheme: light;
    --bg:        light-dark(#fafaf7, #0f1115);
    --surface:   light-dark(#ffffff, #1a1d24);
    --surface-2: light-dark(#f3f4ef, #20242d);
    --fg:        light-dark(#1a1a1a, #e6e8ee);
    --muted:     light-dark(#6b7280, #9aa3b2);
    --pri:       oklch(55% 0.16 255);
    --pri-soft:  color-mix(in oklch, var(--pri), white 88%);
    --accent:    oklch(70% 0.17 75);
    --line:      light-dark(#e5e7eb, #2a2f3a);
    --code-bg:   light-dark(#f0eee6, #252a35);
    --radius:    0.625rem;
    --radius-lg: 1rem;
    --font-sans: -apple-system, BlinkMacSystemFont, "Pretendard", "Apple SD Gothic Neo", sans-serif;
    --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, monospace;
  }

  :root[data-theme="dark"] { color-scheme: dark; }
}

@layer base {
  html { scroll-behavior: smooth; }
  body {
    font-family: var(--font-sans);
    line-height: 1.7;
    background: var(--bg);
    color: var(--fg);
    -webkit-font-smoothing: antialiased;
  }

  main, header, footer { padding-inline: clamp(1rem, 5vw, 3rem); }

  h1 { font-size: clamp(1.75rem, 4vw, 2.75rem); line-height: 1.2; letter-spacing: -0.02em; font-weight: 700; }
  h2 { font-size: clamp(1.25rem, 2.5vw, 1.6rem); margin-block: 2.5rem 1rem; letter-spacing: -0.01em; }
  h3 { font-size: 1.05rem; font-weight: 600; margin-block-end: 0.5rem; letter-spacing: -0.005em; }

  p { color: var(--fg); }
  em { font-style: italic; color: var(--muted); }
  strong { font-weight: 600; }

  code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background: var(--code-bg);
    padding: 0.125em 0.375em;
    border-radius: 0.3em;
  }

  blockquote {
    border-inline-start: 3px solid var(--pri);
    background: var(--pri-soft);
    padding: 0.75rem 1rem;
    margin-block: 0.75rem;
    border-radius: 0 var(--radius) var(--radius) 0;
    color: light-dark(#27303a, #c8cdd6);
    font-size: 0.95rem;
  }
  blockquote + blockquote { margin-block-start: 0.5rem; }
}

@layer components {
  .hero {
    max-width: 56rem;
    margin-inline: auto;
    padding-block: clamp(3rem, 8vw, 5rem);
    text-align: center;
  }
  .eyebrow {
    color: var(--muted);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-block-end: 0.75rem;
  }
  .hero h1 code {
    background: var(--pri-soft);
    color: var(--pri);
    font-size: 0.85em;
    padding: 0.1em 0.4em;
  }
  .lede {
    margin-block-start: 1.5rem;
    color: var(--muted);
    font-size: 1.05rem;
    max-width: 42rem;
    margin-inline: auto;
  }
  .lede strong { color: var(--fg); }

  main {
    max-width: 48rem;
    margin-inline: auto;
    padding-block-end: 4rem;
  }

  main > section {
    margin-block: 2.5rem;
  }

  .tldr {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 1.5rem 1.75rem;
  }
  .tldr h2 { margin-block: 0 0.5rem; font-size: 1rem; color: var(--accent); text-transform: uppercase; letter-spacing: 0.1em; }

  .reasons {
    list-style: none;
    display: grid;
    gap: 1rem;
  }
  .reasons > li {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 1.25rem 1.5rem;
    transition: transform 0.15s ease, border-color 0.15s ease;
  }
  .reasons > li:hover {
    border-color: var(--pri);
    transform: translateY(-1px);
  }

  .summary {
    text-align: center;
    background: linear-gradient(180deg, var(--pri-soft), transparent);
    border-radius: var(--radius-lg);
    padding: 2rem 1.5rem;
  }
  .summary .big {
    font-size: 1.2rem;
    font-weight: 600;
    margin-block: 0.75rem 1rem;
    line-height: 1.5;
  }

  .chan h2 { color: var(--pri); }
  .compare {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-block: 1rem;
  }
  @container (min-width: 640px) {
    .compare { grid-template-columns: 1fr 1fr; }
  }
  .compare > article {
    background: var(--surface-2);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
  }
  .compare > article h3 { color: var(--pri); margin-block-end: 0.5rem; }
  .compare > article ul {
    list-style: disc;
    padding-inline-start: 1.1rem;
    color: var(--muted);
    font-size: 0.95rem;
  }
  .compare > article ul li + li { margin-block-start: 0.25rem; }
  .kicker {
    text-align: center;
    font-weight: 600;
    margin-block-start: 1rem;
    color: var(--fg);
  }

  /* main 자체를 container 로 — compare 가 main 너비 기준 반응 */
  main { container-type: inline-size; }

  footer {
    max-width: 48rem;
    margin-inline: auto;
    padding-block: 2rem 3rem;
    color: var(--muted);
    font-size: 0.85rem;
    text-align: center;
    border-block-start: 1px solid var(--line);
  }
}