/* GoForms site.
   One palette, defined light-first on :root and re-stated for the two ways a
   visitor can end up dark: an explicit choice, and the system default. */
:root {
  --bg: #f8fafc;
  --bg-raised: #ffffff;
  --bg-sunken: #eef2f7;
  --ink: #0f172a;
  --ink-soft: #475569;
  --ink-faint: #64748b;
  --line: #dbe2ea;
  --accent: #2563eb;
  --accent-soft: #dbeafe;
  --accent-ink: #1d4ed8;
  --code-bg: #0f172a;
  --code-ink: #e2e8f0;
  --shadow: 0 1px 2px rgba(15, 23, 42, .06), 0 12px 32px -12px rgba(15, 23, 42, .18);
  --radius: 14px;
  --measure: 68ch;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b1120;
    --bg-raised: #111a2e;
    --bg-sunken: #0f172a;
    --ink: #e8eef8;
    --ink-soft: #a8b6cd;
    --ink-faint: #8296b3;
    --line: #23314c;
    --accent: #60a5fa;
    --accent-soft: #17264a;
    --accent-ink: #93c5fd;
    --code-bg: #070c17;
    --code-ink: #dbe4f3;
    --shadow: 0 1px 2px rgba(0, 0, 0, .5), 0 16px 40px -16px rgba(0, 0, 0, .7);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #0b1120;
  --bg-raised: #111a2e;
  --bg-sunken: #0f172a;
  --ink: #e8eef8;
  --ink-soft: #a8b6cd;
  --ink-faint: #8296b3;
  --line: #23314c;
  --accent: #60a5fa;
  --accent-soft: #17264a;
  --accent-ink: #93c5fd;
  --code-bg: #070c17;
  --code-ink: #dbe4f3;
  --shadow: 0 1px 2px rgba(0, 0, 0, .5), 0 16px 40px -16px rgba(0, 0, 0, .7);
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.65 -apple-system, "Segoe UI", "Inter", Roboto, "Noto Sans",
        "Helvetica Neue", Arial, ui-sans-serif, system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent-ink); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--accent); }

code, pre, kbd {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
               "Liberation Mono", monospace;
}

.wrap { width: min(1120px, 100% - 3rem); margin-inline: auto; }

/* ---- Header ---------------------------------------------------------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--line);
}

.topbar .wrap {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  min-height: 60px;
}

.brand {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-weight: 700;
  letter-spacing: -.015em;
  color: var(--ink);
  text-decoration: none;
  margin-right: auto;
}
.brand img { width: 30px; height: 30px; }

.topbar nav {
  display: flex;
  gap: 1.1rem;
  flex-wrap: wrap;
  font-size: .92rem;
}
.topbar nav a { color: var(--ink-soft); text-decoration: none; }
.topbar nav a:hover { color: var(--accent); }

/* ---- Intro and prose ------------------------------------------------- */

.intro { padding-top: clamp(2.5rem, 5vw, 3.5rem); }
.intro h1 { margin: 0 0 1rem; }
.intro p, section > .wrap > p { max-width: var(--measure); color: var(--ink-soft); }
.lead { font-size: clamp(1.02rem, 1.6vw, 1.14rem); color: var(--ink) !important; }

h2 {
  font-size: clamp(1.3rem, 2.4vw, 1.7rem);
  letter-spacing: -.02em;
  margin: 2.8rem 0 1rem;
}
section > .wrap > h2:first-child { margin-top: 0; }

ul.facts { max-width: var(--measure); padding-left: 1.2rem; color: var(--ink-soft); }
ul.facts li { margin-bottom: .6rem; }
ul.facts strong { color: var(--ink); }

.note {
  max-width: var(--measure);
  padding: .9rem 1.1rem;
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  font-size: .95rem;
}

figure.shot { margin: 2rem 0 0; }
figure.shot img { border-radius: var(--radius); border: 1px solid var(--line); box-shadow: var(--shadow); }
figure.shot figcaption { margin-top: .6rem; font-size: .88rem; color: var(--ink-faint); }

/* ---- Sections -------------------------------------------------------- */

section { padding: clamp(3rem, 7vw, 5.5rem) 0; }
section + section { border-top: 1px solid var(--line); }

/* ---- Code ------------------------------------------------------------ */

.split {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 1.6rem;
  align-items: start;
}

figure.code {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
figure.code figcaption {
  background: var(--bg-sunken);
  border-bottom: 1px solid var(--line);
  padding: .55rem .95rem;
  font-size: .82rem;
  font-weight: 600;
  color: var(--ink-faint);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
pre {
  margin: 0;
  padding: 1.1rem;
  background: var(--code-bg);
  color: var(--code-ink);
  overflow-x: auto;
  font-size: .855rem;
  line-height: 1.6;
  tab-size: 4;
}
.k  { color: #93c5fd; }
.s  { color: #86efac; }
.n  { color: #fca5a5; }
.c  { color: #7d8ba5; font-style: italic; }
.t  { color: #fcd34d; }
.f  { color: #c4b5fd; }

/* ---- Catalog --------------------------------------------------------- */

.chips { display: flex; flex-wrap: wrap; gap: .45rem; }
.chip {
  font-size: .84rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  padding: .3rem .65rem;
  border-radius: 8px;
  background: var(--bg-raised);
  border: 1px solid var(--line);
  color: var(--ink-soft);
}
.catalog-group + .catalog-group { margin-top: 1.6rem; }
.catalog-group h3 {
  font-size: .8rem;
  letter-spacing: .07em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin: 0 0 .7rem;
}

/* ---- Repo table ------------------------------------------------------ */

/* ---- Footer ---------------------------------------------------------- */

footer {
  border-top: 1px solid var(--line);
  padding: 2.5rem 0 3.5rem;
  color: var(--ink-faint);
  font-size: .9rem;
}
footer .wrap { display: flex; flex-wrap: wrap; gap: 1rem 2rem; align-items: center; }
footer nav { display: flex; gap: 1.2rem; margin-left: auto; flex-wrap: wrap; }
footer a { color: var(--ink-soft); text-decoration: none; }
footer a:hover { color: var(--accent); }

@media (max-width: 860px) {
    .topbar nav { display: none; }
}

/* ---- Language switch -------------------------------------------------- */

.lang-switch {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  font-size: .82rem;
  line-height: 1;
  margin-left: .5rem;
  flex: none;
}
.lang-switch a {
  padding: .34rem .6rem;
  color: var(--ink-faint);
  text-decoration: none;
  background: var(--bg-raised);
  font-weight: 600;
}
.lang-switch a + a { border-left: 1px solid var(--line); }
.lang-switch a:hover { color: var(--ink); }
.lang-switch a[aria-current="true"] {
  background: var(--accent);
  color: #fff;
}

/* The switch is the one nav item that stays when the rest collapses: it is
   how a reader on a phone gets to their own language at all. */
@media (max-width: 860px) {
  .topbar .lang-switch { display: inline-flex; }
}