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

@layer reset {
  *, *::before, *::after { box-sizing: border-box; }
  * { margin: 0; }
  html { -webkit-text-size-adjust: 100%; }
  body { min-height: 100svh; }
  img, svg { display: block; max-width: 100%; }
  button { font: inherit; color: inherit; }
  a { color: inherit; }
}

@layer tokens {
  :root {
    --bg: oklch(0.185 0.013 265);
    --bg-elev: oklch(0.225 0.014 265);
    --bg-code: oklch(0.145 0.015 265);
    --border: oklch(0.325 0.016 265);
    --text: oklch(0.94 0.006 265);
    --muted: oklch(0.76 0.014 265);
    --accent: oklch(0.82 0.16 160);
    --accent-ink: oklch(0.18 0.02 265);
    --focus: oklch(0.86 0.13 205);
    --radius: 0.75rem;

    --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

    --step--1: clamp(0.83rem, 0.8rem + 0.15vw, 0.9rem);
    --step-0: clamp(1rem, 0.96rem + 0.2vw, 1.08rem);
    --step-1: clamp(1.25rem, 1.15rem + 0.5vw, 1.5rem);
    --step-2: clamp(1.6rem, 1.35rem + 1.2vw, 2.25rem);
    --step-3: clamp(2.2rem, 1.6rem + 3vw, 3.5rem);
    --step-4: clamp(2.8rem, 1.7rem + 5vw, 5rem);
  }
}

@layer base {
  body {
    font-family: var(--sans);
    background: var(--bg);
    color: var(--text);
    font-size: var(--step-0);
    line-height: 1.6;
    min-height: 100svh;
    overflow-x: clip;
  }
  h1, h2, h3 { font-weight: 650; line-height: 1.15; text-wrap: balance; }
  p { text-wrap: pretty; }
  code { font-family: var(--mono); }
  a { text-underline-offset: 0.2em; }
  :focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 4px; }
  ::selection { background: var(--accent); color: var(--accent-ink); }
}

@layer components {
  .wrap { width: min(100% - 2rem, 68rem); margin-inline: auto; }

  .skip {
    position: absolute; inset-inline-start: 1rem; inset-block-start: -3rem;
    padding: 0.5rem 1rem; background: var(--accent); color: var(--accent-ink); border-radius: 999px;
  }
  .skip:focus { inset-block-start: 0.5rem; }

  .site-header { border-block-end: 1px solid var(--border); }
  .site-header .wrap {
    display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
    gap: 0.25rem 1rem; min-height: 3.5rem; padding-block: 0.5rem;
  }
  .wordmark { font-family: var(--mono); font-weight: 700; font-size: var(--step-0); letter-spacing: -0.01em; text-decoration: none; }
  .wordmark::before { content: "$ "; color: var(--accent); }
  .site-nav { display: flex; flex-wrap: wrap; gap: 0 1rem; font-size: var(--step--1); }
  .site-nav a { display: inline-flex; align-items: center; min-height: 2.75rem; color: var(--muted); text-decoration: none; }
  .site-nav a[aria-current="page"] { color: var(--text); text-decoration: underline; text-decoration-color: var(--accent); }

  .hero { padding-block: clamp(3rem, 9vw, 7rem) clamp(2rem, 6vw, 4rem); }
  .hero-inner { max-width: 46rem; }
  h1 { font-size: var(--step-4); letter-spacing: -0.025em; }
  h1 .hl { color: var(--accent); font-family: var(--mono); font-weight: 700; }
  .lede { margin-block-start: 1.25rem; font-size: var(--step-1); color: var(--muted); max-width: 42rem; }
  .lede strong { color: var(--text); font-weight: 600; }
  .sub { margin-block-start: 1rem; color: var(--muted); max-width: 42rem; }

  .cmd {
    display: flex; align-items: center; gap: 0.75rem;
    max-width: 32rem; margin-block-start: 2rem;
    padding: 0.35rem 0.35rem 0.35rem 1rem;
    background: var(--bg-code); border: 1px solid var(--border); border-radius: 999px;
  }
  .cmd-pre { flex: 1 1 auto; min-width: 0; overflow-x: auto; }
  .cmd-pre code { font-size: var(--step-0); white-space: pre; }
  .alt { margin-block-start: 0.85rem; font-size: var(--step--1); color: var(--muted); }
  .alt code { color: var(--text); }

  .actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-block-start: 1.75rem; }

  .btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
    min-height: 2.75rem; padding-block: 0.5rem; padding-inline: 1.25rem;
    border-radius: 999px; border: 1px solid transparent;
    font: inherit; font-weight: 600; line-height: 1; text-decoration: none; cursor: pointer;
  }
  .btn--primary { background: var(--accent); color: var(--accent-ink); }
  .btn--ghost { background: transparent; border-color: var(--border); color: var(--text); }
  .copy { flex: 0 0 auto; padding-inline: 1rem; }
  .copy[data-copied] { border-color: var(--accent); color: var(--accent); }

  .section { padding-block: clamp(2.5rem, 6vw, 4.5rem); }
  .section-title { font-size: var(--step-2); }
  .section-intro { margin-block-start: 0.75rem; color: var(--muted); max-width: 46rem; }
  .caption { margin-block-start: 0.5rem; font-size: var(--step--1); }

  .cards { display: grid; grid-template-columns: minmax(0, 1fr); gap: 1rem; margin-block-start: 1.75rem; }
  .card { min-inline-size: 0; background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.5rem; }
  .card h3 { font-size: var(--step-1); margin-block-end: 0.6rem; }
  .card p { font-size: var(--step--1); }
  .card-run { margin-block-start: 0.9rem; }
  .card-run code { color: var(--text); }
  .cards--guides .card h3 { font-size: var(--step-0); }

  .copyblock {
    display: flex; align-items: flex-start; gap: 0.75rem; margin-block-start: 1rem;
    padding: 0.7rem 0.7rem 0.7rem 1rem;
    background: var(--bg-code); border: 1px solid var(--border); border-radius: var(--radius);
  }
  .code-pre { flex: 1 1 auto; min-width: 0; overflow-x: auto; }
  .code-pre code { font-size: var(--step--1); white-space: pre; color: var(--text); }

  .checks { display: grid; grid-template-columns: 1fr; gap: 2.5rem; margin-block-start: 1.75rem; }
  .check-col > h3 { font-size: var(--step-0); }
  .check-col > p { font-size: var(--step--1); margin-block-start: 0.6rem; }
  .checks-list { list-style: none; display: grid; gap: 0.7rem; margin-block-start: 1rem; padding: 0; }
  .checks-list li { position: relative; padding-inline-start: 1.5rem; font-size: var(--step--1); color: var(--muted); }
  .checks-list li::before {
    content: "→"; position: absolute; inset-inline-start: 0; inset-block-start: 0;
    color: var(--accent); font-family: var(--mono);
  }

  /* Subpages */
  .crumbs { padding-block-start: 1.5rem; font-size: var(--step--1); color: var(--muted); }
  .crumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 0.25rem 0.5rem; padding: 0; }
  .crumbs li + li::before { content: "/"; margin-inline-end: 0.5rem; color: var(--border); }
  .page-head { padding-block: 1.5rem 1.25rem; max-width: 50rem; }
  .page-head h1 { font-size: clamp(1.9rem, 1.4rem + 2.6vw, 3.25rem); }
  .byline { margin-block-start: 0.85rem; font-size: var(--step--1); }
  .answer {
    max-width: 46rem; padding: 1rem 1.25rem;
    background: var(--bg-elev); border: 1px solid var(--border); border-inline-start: 4px solid var(--accent);
    border-radius: var(--radius);
  }

  .prose { max-width: 46rem; margin-block-start: 1.5rem; }
  .prose > * + * { margin-block-start: 1rem; }
  .prose h2 { margin-block-start: 2.5rem; font-size: var(--step-2); }
  .prose h3 { margin-block-start: 1.75rem; font-size: var(--step-1); }
  .prose ul, .prose ol { padding-inline-start: 1.4rem; }
  .prose li + li { margin-block-start: 0.4rem; }
  .prose li > ul, .prose li > ol { margin-block-start: 0.4rem; }
  .prose :not(pre) > code, .answer code, .card code, .lede code, .sub code, .checks-list code {
    padding: 0.08em 0.35em; background: var(--bg-code); border: 1px solid var(--border); border-radius: 4px;
    font-size: 0.92em; overflow-wrap: anywhere;
  }
  pre.block {
    padding: 1rem; background: var(--bg-code); border: 1px solid var(--border); border-radius: var(--radius);
    overflow-x: auto; font-size: var(--step--1); line-height: 1.55;
  }
  pre.block code { white-space: pre; }
  .note { padding: 0.85rem 1.1rem; border: 1px dashed var(--border); border-radius: var(--radius); font-size: var(--step--1); color: var(--muted); }

  .table-wrap { overflow-x: auto; }
  table { border-collapse: collapse; width: 100%; font-size: var(--step--1); }
  th, td { padding: 0.6rem 0.75rem; border-block-end: 1px solid var(--border); text-align: start; vertical-align: top; }
  thead th { color: var(--muted); font-weight: 600; }

  .related { max-width: 46rem; margin-block-start: 3rem; padding-block-start: 1.5rem; border-block-start: 1px solid var(--border); }
  .related h2 { font-size: var(--step-1); }
  .related ul { margin-block-start: 0.75rem; padding-inline-start: 1.2rem; }
  .related li + li { margin-block-start: 0.35rem; }

  .site-footer { border-block-start: 1px solid var(--border); margin-block-start: clamp(2.5rem, 6vw, 4.5rem); padding-block: 2rem; }
  .site-footer .wrap { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1rem; }
  .footer-nav { display: flex; flex-wrap: wrap; gap: 0.25rem 1.5rem; }
  .footer-nav a { display: inline-flex; align-items: center; min-height: 2.75rem; }
}

@layer utilities {
  .muted { color: var(--muted); }
  .sr-only {
    position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
    overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0;
  }
}

@media (45rem <= width < 72rem) {
  .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cards--tools > :last-child { grid-column: 1 / -1; }
  .checks { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2.5rem; }
}

@media (width >= 72rem) {
  .cards { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .checks { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 3rem; }
  .checks--two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (prefers-reduced-motion: no-preference) {
  .btn, .card, .wordmark, .footer-nav a, .site-nav a {
    transition: color 0.15s ease, background-color 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
  }
  .btn:hover { transform: translateY(-1px); }
  .btn--ghost:hover { border-color: var(--accent); color: var(--accent); }
  .card:hover { border-color: var(--accent); transform: translateY(-2px); }
  .wordmark:hover, .footer-nav a:hover, .site-nav a:hover { color: var(--accent); }
}