/* php-ron landing page. Minimal dev-docs theme, modern CSS, progressive enhancement. */

:root {
  color-scheme: light dark;

  --bg:       light-dark(oklch(99% 0.003 270), oklch(15% 0.012 275));
  --surface:  light-dark(oklch(97% 0.005 270), oklch(19% 0.016 275));
  --surface-2:light-dark(oklch(94% 0.008 270), oklch(23% 0.018 275));
  --text:     light-dark(oklch(28% 0.02 275),  oklch(93% 0.01 275));
  --muted:    light-dark(oklch(48% 0.02 275),  oklch(67% 0.02 275));
  --border:   light-dark(oklch(90% 0.01 275),  oklch(29% 0.02 275));
  --accent:   light-dark(oklch(52% 0.2 285),   oklch(74% 0.16 285));
  --accent-ink: light-dark(oklch(99% 0.01 285), oklch(16% 0.03 285));
  --good:     light-dark(oklch(52% 0.15 152),  oklch(80% 0.15 155));
  /* tempest/highlight token colours (RON via ../tempest-highlight-ron) */
  --hl-key:   light-dark(oklch(45% 0.16 264), oklch(80% 0.12 264)); /* keys */
  --hl-type:  light-dark(oklch(48% 0.12 200), oklch(82% 0.10 200)); /* types/classes */
  --hl-str:   light-dark(oklch(46% 0.13 152), oklch(82% 0.12 155)); /* string values */
  --hl-num:   light-dark(oklch(52% 0.15 62),  oklch(84% 0.13 75));  /* numbers */
  --hl-lit:   light-dark(oklch(52% 0.19 312), oklch(82% 0.15 312)); /* true/false/null */
  --hl-punct: light-dark(oklch(55% 0.03 275), oklch(64% 0.03 275)); /* braces, methods */

  --maxw: 64rem;
  --radius: 14px;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code", Menlo, Consolas, monospace;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: clamp(15px, 0.9rem + 0.2vw, 17px);
  line-height: 1.6;
  color: var(--text);
  background:
    radial-gradient(60rem 40rem at 80% -10%, color-mix(in oklch, var(--accent) 12%, transparent), transparent 70%),
    var(--bg);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 { line-height: 1.15; letter-spacing: -0.02em; }

.skip {
  position: absolute; left: -999px;
  background: var(--accent); color: var(--accent-ink);
  padding: .6rem 1rem; border-radius: 0 0 8px 0; z-index: 10;
}
.skip:focus { left: 0; top: 0; }

main { display: block; }

section {
  max-width: var(--maxw);
  margin-inline: auto;
  padding: clamp(2.5rem, 6vw, 5rem) 1.25rem;
}
section > h2 {
  font-size: clamp(1.5rem, 1.1rem + 1.4vw, 2.1rem);
  margin: 0 0 .6rem;
}
.section-lede { color: var(--muted); max-width: 52ch; margin: 0 0 2rem; }

/* ── Logo / header / footer ── */
.logo {
  font-family: var(--mono);
  font-weight: 700;
  letter-spacing: -0.03em;
  font-size: 1.1rem;
}
.logo b { color: var(--accent); font-weight: 700; }
.logo.small { font-size: 1rem; }

header.site, footer.site {
  max-width: var(--maxw);
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
}
header.site { position: sticky; top: 0; z-index: 5;
  background: color-mix(in oklch, var(--bg) 80%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
header.site nav { margin-left: auto; display: flex; gap: 1.1rem; align-items: center; font-size: .92rem; }
header.site nav a { color: var(--muted); }
header.site nav a:hover { color: var(--text); text-decoration: none; }
header.site nav a.ghost {
  color: var(--text);
  border: 1px solid var(--border);
  padding: .35rem .7rem; border-radius: 8px;
}
@media (max-width: 640px) { header.site nav a:not(.ghost) { display: none; } }

footer.site {
  flex-wrap: wrap;
  border-top: 1px solid var(--border);
  margin-top: 3rem;
  color: var(--muted);
}
footer.site p { margin: .3rem 0 0; font-size: .9rem; max-width: 40ch; }
footer.site nav { display: flex; gap: 1.1rem; flex-wrap: wrap; margin-left: auto; }
footer.site small { width: 100%; color: var(--muted); padding-top: .5rem; }

/* ── Hero ── */
.hero { text-align: left; padding-top: clamp(3rem, 8vw, 6rem); }
.hero h1 {
  font-size: clamp(2.2rem, 1.3rem + 4.5vw, 4rem);
  margin: 0 0 1rem;
  font-weight: 800;
}
.grad {
  background: linear-gradient(100deg, var(--accent), color-mix(in oklch, var(--accent) 55%, var(--good)));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lede { font-size: 1.1rem; color: var(--muted); max-width: 58ch; margin: 0 0 2rem; }
.lede strong { color: var(--text); }

.cta { display: grid; gap: 1rem; margin-bottom: 1.75rem; }
.install {
  display: flex; align-items: center; gap: .5rem;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 10px; padding: .5rem .5rem .5rem .9rem;
  max-width: max-content;
  font-family: var(--mono);
}
.install code { font-family: var(--mono); font-size: .95rem; white-space: nowrap; }
.install .prompt { color: var(--accent); user-select: none; margin-right: .4rem; }

.copy {
  font: inherit; font-family: var(--sans); font-size: .8rem;
  cursor: pointer; border: 1px solid var(--border);
  background: var(--surface-2); color: var(--muted);
  border-radius: 7px; padding: .3rem .6rem;
  transition: color .15s, border-color .15s, background .15s;
}
.copy:hover { color: var(--text); border-color: var(--accent); }
.copy.copied { color: var(--good); border-color: var(--good); }

.cta-links { display: flex; gap: .7rem; flex-wrap: wrap; }
.btn {
  display: inline-block; padding: .6rem 1.1rem; border-radius: 9px;
  border: 1px solid var(--border); color: var(--text); font-weight: 600; font-size: .95rem;
  transition: border-color .15s, transform .1s, background .15s;
}
.btn:hover { text-decoration: none; border-color: var(--accent); transform: translateY(-1px); }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.btn.primary:hover { background: color-mix(in oklch, var(--accent) 88%, black); }

.badges { display: flex; flex-wrap: wrap; gap: .5rem; list-style: none; padding: 0; margin: 0; }
.badges li {
  font-size: .8rem; color: var(--muted);
  background: var(--surface); border: 1px solid var(--border);
  padding: .25rem .65rem; border-radius: 100px;
}

/* ── Code blocks ── */
.code {
  font-family: var(--mono);
  font-size: .88rem;
  line-height: 1.55;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  margin: 0;
  overflow-x: auto;
  tab-size: 2;
}
/* Highlight tokens (the hl-* classes are namespaced, so no scoping is needed). */
.hl-comment  { color: var(--muted); font-style: italic; }
.hl-keyword  { color: var(--hl-key); }
.hl-type     { color: var(--hl-type); }
.hl-value    { color: var(--hl-str); }
.hl-number   { color: var(--hl-num); }
.hl-literal  { color: var(--hl-lit); font-weight: 600; }
.hl-property { color: var(--hl-punct); }
.hl-variable { color: var(--text); }

/* ── Comparison ── */
.cmp {
  container-type: inline-size;
  display: grid; gap: 1rem;
  grid-template-columns: 1fr 1fr;
}
@container (max-width: 560px) { .cmp { grid-template-columns: 1fr; } }
@media (max-width: 560px) { .cmp { grid-template-columns: 1fr; } }
.cmp-col { margin: 0; }
.cmp-col figcaption {
  font-family: var(--mono); font-size: .8rem; color: var(--muted);
  margin-bottom: .5rem; display: flex; justify-content: space-between; align-items: baseline;
}
.cmp-col .meta { font-size: .75rem; }
.cmp-col .meta.good { color: var(--good); }

/* ── Playground (swapped in for .cmp once Datastar sets .is-live) ──
   Kept rendered but collapsed (not display:none) so the iframe still loads and can
   post its height handshake while hidden; revealed only once that handshake confirms
   the real playground. A display:none iframe can't measure its height, so it could
   never post. */
.playground {
  visibility: hidden;
  max-height: 0;
  overflow: hidden;
}
.playground.is-live {
  visibility: visible;
  max-height: none;
  overflow: visible;
  animation: rise .4s ease both;
}
@keyframes rise { from { opacity: 0; transform: translateY(8px); } }
.pg-frame iframe {
  width: 100%;
  min-height: 480px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  display: block;
}

/* ── Typed vocabularies ── */
.vocab { interpolate-size: allow-keywords; } /* enables block-size auto animation below */
.vocab h3 { font-size: 1.15rem; margin: 2.25rem 0 .25rem; }
.vocab .split {
  display: grid; gap: 1rem;
  grid-template-columns: 1fr 1fr;
  align-items: start;
}
@media (max-width: 720px) { .vocab .split { grid-template-columns: 1fr; } }
.vocab-col { margin: 0; }
.vocab-col figcaption {
  font-family: var(--mono); font-size: .8rem; color: var(--muted); margin-bottom: .5rem;
}
.vocab .table-wrap code { font-family: var(--mono); font-size: .82em; word-break: break-word; }

/* Custom-vocabulary recipes: collapsible <details>, animated open/close. */
.recipe {
  border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--surface); margin-top: .6rem; overflow: hidden;
}
.recipe summary {
  cursor: pointer; list-style: none;
  display: flex; align-items: center; gap: .55rem;
  padding: .6rem .9rem; font-size: .9rem; color: var(--muted);
}
.recipe summary::-webkit-details-marker { display: none; }
.recipe summary code { font-family: var(--mono); color: var(--text); }
.recipe summary .label { flex: 1; } /* fills the row so the badge sits hard right */
.recipe summary .kind {
  flex: none; font-size: .66rem; font-weight: 700; text-transform: uppercase; letter-spacing: .04em;
  padding: .12rem .45rem; border-radius: 100px;
}
.kind-validate { background: var(--surface-2); color: var(--muted); }
.kind-transform { background: color-mix(in oklch, var(--accent) 22%, transparent); color: var(--accent); }
.recipe summary::before {
  content: ""; flex: none; width: .5rem; height: .5rem;
  border-right: 2px solid currentColor; border-bottom: 2px solid currentColor;
  transform: rotate(-45deg); transition: transform .2s ease;
}
.recipe[open] summary::before { transform: rotate(45deg); }
.recipe pre.code { border: 0; border-top: 1px solid var(--border); border-radius: 0; margin: 0; }
@media (prefers-reduced-motion: no-preference) {
  .recipe::details-content {
    block-size: 0; overflow: clip;
    transition: block-size .3s ease, content-visibility .3s allow-discrete;
  }
  .recipe[open]::details-content { block-size: auto; }
}

/* ── Features ── */
.grid { list-style: none; padding: 0; margin: 0; display: grid; gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); }
.grid > li {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.25rem;
  transition: border-color .2s, transform .2s;
}
.grid > li:hover { border-color: color-mix(in oklch, var(--accent) 55%, var(--border)); transform: translateY(-2px); }
.grid h3 { margin: 0 0 .4rem; font-size: 1.05rem; }
.grid p { margin: 0; color: var(--muted); font-size: .92rem; }
.grid code, .footnote code, .api code, .section-lede code, .features code {
  font-family: var(--mono); font-size: .85em;
  background: var(--surface-2); padding: .05em .35em; border-radius: 5px;
}

@media (prefers-reduced-motion: no-preference) {
  .grid > li {
    animation: reveal linear both;
    animation-timeline: view();
    animation-range: entry 0% cover 18%;
  }
  @keyframes reveal { from { opacity: 0; transform: translateY(14px); } }
}

/* ── Tables (API + perf) ── */
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: left; padding: .7rem .9rem; border-bottom: 1px solid var(--border); vertical-align: top; }
thead th { background: var(--surface); color: var(--muted); font-weight: 600; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:nth-child(even) td { background: color-mix(in oklch, var(--surface) 45%, transparent); }
td code { font-family: var(--mono); font-size: .82em; word-break: break-word; }
.api td:first-child { white-space: normal; }
.good { color: var(--good); font-weight: 600; }
.footnote { color: var(--muted); font-size: .85rem; max-width: 70ch; margin-top: 1rem; }

/* ── Use cases ── */
.chips { display: flex; flex-wrap: wrap; gap: .6rem; list-style: none; padding: 0; margin: 1rem 0 0; }
.chips li {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 100px; padding: .5rem 1rem; font-size: .95rem;
}

/* ── Copy feedback toast via discrete animation ── */
.codeblock { position: relative; }
.codeblock .copy { position: absolute; top: .7rem; right: .7rem; z-index: 1; }

.copy::after {
  content: "Copied";
  position: absolute;
  inset-block-end: calc(100% + 6px);
  inset-inline-end: 0;
  background: var(--good); color: var(--accent-ink);
  font-size: .7rem; padding: .15rem .45rem; border-radius: 5px;
  white-space: nowrap;
  opacity: 0; display: none;
  transition: opacity .2s, display .2s allow-discrete;
}
.copy.copied::after {
  opacity: 1; display: block;
  @starting-style { opacity: 0; }
}