/* ioxide - docs site. No frameworks, no fonts, no JS. */

:root {
  --bg: #202124;            /* google.com dark mode */
  --bg-soft: #28292c;
  --bg-card: #303134;       /* google dark surface */
  --line: #3c4043;          /* google dark border */
  --text: #e8eaed;          /* google dark text */
  --text-dim: #9aa0a6;      /* google dark secondary */
  --accent: #e25822;        /* iron oxide */
  --accent-soft: #f07b4a;
  --code-bg: #1a1b1e;
  --good: #4cc38a;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

code, pre {
  font-family: ui-monospace, "Cascadia Code", "JetBrains Mono", Menlo, Consolas, monospace;
  font-size: 0.92em;
}

code { background: var(--code-bg); border: 1px solid var(--line); padding: 0.1em 0.35em; }

pre {
  background: var(--code-bg);
  border: 1px solid var(--line);
  padding: 1.1rem 1.35rem;
  overflow-x: auto;
  line-height: 1.6;
  margin: 1.1rem 0;
}
pre code { background: none; border: none; padding: 0; }
pre code.hljs { background: var(--code-bg); padding: 0; }   /* keep our palette under highlight.js */

/* ── top nav ─────────────────────────────────────────── */

nav.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.9rem 1.5rem;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  background: rgba(32, 33, 36, 0.92);
  backdrop-filter: blur(8px);
  z-index: 10;
}

.brand {
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--text);
}
.brand span { color: var(--accent); }
.brand:hover { text-decoration: none; }

nav.top .links a {
  color: var(--text-dim);
  margin-left: 1.4rem;
  font-size: 0.95rem;
}
nav.top .links a:hover { color: var(--text); text-decoration: none; }
nav.top .links { display: flex; align-items: center; }
nav.top .links a.gh svg { display: block; }

/* ── landing ─────────────────────────────────────────── */

.hero {
  position: relative;
  max-width: 980px;
  margin: 0 auto;
  padding: 5.5rem 1.5rem 3.5rem;
  text-align: center;
}

/* staggered entrance */
.hero h1, .hero .sub { animation: rise 0.55s ease-out both; }
.hero h1   { animation-delay: 0.05s; }
.hero .sub { animation-delay: 0.12s; }

@keyframes rise {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: none; }
}

.hero h1 {
  font-size: clamp(2.1rem, 5.5vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.12;
}
.hero h1 em { color: var(--accent); font-style: normal; }
@media (max-width: 560px) { .hero h1 br { display: none; } }   /* wrap naturally on phones */

.hero p.sub {
  margin: 1.3rem auto 0;
  max-width: 660px;
  color: var(--text-dim);
  font-size: 1.15rem;
}

/* ── code tabs ───────────────────────────────────────── */

.tabs { margin: 1.1rem 0; }
.tabs > input { display: none; }

.tab-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 2px;
}

/* fieldset-style box that visibly encloses the two raw tabs */
.tab-rawgroup {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-bottom: none;
  background: var(--bg-soft);
  padding: 0.3rem 0.3rem 0;
}
.tab-rawtabs  { display: flex; gap: 2px; }
.tab-bar label {
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-dim);
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-bottom: none;
  padding: 0.45rem 1rem;
  cursor: pointer;
}
.tab-bar label:hover { color: var(--text); }

.tab-group {
  text-align: center;
  color: var(--accent-soft);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding-bottom: 0.3rem;
  opacity: 0.9;
}

#tab-shared:checked ~ .tab-bar label[for="tab-shared"],
#tab-inc:checked    ~ .tab-bar label[for="tab-inc"],
#tab-pipe:checked   ~ .tab-bar label[for="tab-pipe"],
#tab-vs:checked     ~ .tab-bar label[for="tab-vs"] {
  color: var(--accent-soft);
  background: var(--code-bg);
}

.pane { display: none; }
#tab-shared:checked ~ .pane-shared { display: block; }
#tab-inc:checked    ~ .pane-inc    { display: block; }
#tab-pipe:checked   ~ .pane-pipe   { display: block; }
#tab-vs:checked     ~ .pane-vs     { display: block; }
.pane pre { margin: 0; }

/* the explainer pane: same panel chrome as the code blocks */
.vs {
  background: var(--code-bg);
  border: 1px solid var(--line);
  padding: 1.2rem 1.35rem;
}
.vs p { margin: 0.7rem 0; color: var(--text-dim); }
.vs p:first-child { margin-top: 0; }
.vs p:last-child { margin-bottom: 0; }
.vs b, .vs em { color: var(--text); font-style: normal; }
.vs table { border-collapse: collapse; width: 100%; margin: 1rem 0; }
.vs th, .vs td { border: 1px solid var(--line); padding: 0.45rem 0.7rem; text-align: left; font-size: 0.9rem; }
.vs th { background: var(--bg-card); color: var(--text); }
.vs td { color: var(--text-dim); }
.vs td:first-child { color: var(--text); }

/* sections */
section.block { max-width: 980px; margin: 0 auto; padding: 3.5rem 1.5rem; }
section.block h2 { font-size: 1.7rem; letter-spacing: -0.02em; margin-bottom: 0.4rem; }
section.block > p.lead { color: var(--text-dim); max-width: 700px; margin-bottom: 1.5rem; }

@media (prefers-reduced-motion: reduce) {
  .hero h1, .hero .sub { animation: none; }
}

footer {
  border-top: 1px solid var(--line);
  color: var(--text-dim);
  text-align: center;
  padding: 2rem 1.5rem;
  font-size: 0.9rem;
}

/* ── docs layout ─────────────────────────────────────── */

.layout {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  max-width: 1100px;
  margin: 0 auto;
  gap: 2.5rem;
  padding: 0 1.5rem;
}

aside.side {
  padding: 2rem 0;
  border-right: 1px solid var(--line);
  position: sticky;
  top: 3.4rem;
  align-self: start;
  height: fit-content;
}
aside.side .group { color: var(--text-dim); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; margin: 1.2rem 0 0.4rem; }
aside.side a { display: block; color: var(--text-dim); padding: 0.28rem 0; font-size: 0.95rem; }
aside.side a:hover { color: var(--text); text-decoration: none; }
aside.side a.here { color: var(--accent-soft); font-weight: 600; }

main.doc { padding: 2.2rem 0 4rem; min-width: 0; }
main.doc h1 { font-size: 2rem; letter-spacing: -0.02em; margin-bottom: 0.4rem; }
main.doc p.lead { color: var(--text-dim); font-size: 1.08rem; margin-bottom: 1.6rem; }
main.doc h2 { font-size: 1.35rem; margin: 2.2rem 0 0.6rem; letter-spacing: -0.01em; }
main.doc h3 { font-size: 1.05rem; margin: 1.6rem 0 0.4rem; color: var(--accent-soft); }
main.doc p { margin: 0.7rem 0; }
main.doc ul, main.doc ol { margin: 0.7rem 0 0.7rem 1.4rem; }
main.doc li { margin: 0.3rem 0; }
main.doc table { border-collapse: collapse; margin: 1rem 0; width: 100%; }
main.doc th, main.doc td { border: 1px solid var(--line); padding: 0.5rem 0.8rem; text-align: left; font-size: 0.95rem; }
main.doc th { background: var(--bg-card); }
main.doc td { color: var(--text-dim); }
main.doc td:first-child { color: var(--text); }

.note {
  border-left: 3px solid var(--accent);
  background: var(--bg-card);
  padding: 0.8rem 1.1rem;
  margin: 1.1rem 0;
  color: var(--text-dim);
  font-size: 0.95rem;
}

.next {
  margin-top: 3rem;
  display: flex;
  justify-content: flex-end;
}

@media (max-width: 760px) {
  .layout { grid-template-columns: 1fr; gap: 0; }
  aside.side { position: static; border-right: none; border-bottom: 1px solid var(--line); padding-bottom: 1rem; }
}