/* ONSCREEN Developer Site — light custom CSS.
 * No framework, no build. Pure static assets that work alongside the
 * Firebase Hosting rewrite so the playground hits the same origin.
 */

:root {
  --bg: #0e1116;
  --bg-elev: #161b22;
  --bg-elev-2: #1c222b;
  --border: #30363d;
  --fg: #e6edf3;
  --fg-muted: #8b949e;
  --accent: #f78166;          /* ONSCREEN-adjacent warm */
  --accent-ink: #fff;
  --ok: #3fb950;
  --warn: #d29922;
  --err: #f85149;
  --link: #58a6ff;
  --code-bg: #0b0f14;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.55;
}

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

header.site {
  border-bottom: 1px solid var(--border);
  background: var(--bg-elev);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}
header.site .brand {
  font-weight: 700;
  letter-spacing: 0.04em;
  font-size: 14px;
}
header.site nav {
  display: flex;
  gap: 20px;
  font-size: 14px;
}
header.site nav a { color: var(--fg-muted); }
header.site nav a.active, header.site nav a:hover { color: var(--fg); text-decoration: none; }

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 24px 96px;
}
main.wide { max-width: 1280px; }

h1 { font-size: 28px; margin: 0 0 8px; letter-spacing: -0.01em; }
h2 { font-size: 20px; margin: 32px 0 12px; }
h3 { font-size: 16px; margin: 24px 0 8px; }
p  { color: var(--fg); }
p.sub { color: var(--fg-muted); margin-top: 0; }

hr { border: none; border-top: 1px solid var(--border); margin: 24px 0; }

code { font-family: var(--font-mono); font-size: 13px; background: var(--code-bg); padding: 1px 6px; border-radius: 4px; }
pre {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--code-bg);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px 14px;
  overflow-x: auto;
}

table {
  border-collapse: collapse;
  width: 100%;
  margin: 12px 0;
  font-size: 14px;
}
th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
th { color: var(--fg-muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.04em; }
tr:last-child td { border-bottom: none; }

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px 20px;
  margin: 16px 0;
}
.card h3 { margin-top: 0; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  vertical-align: 1px;
}
.badge.live  { background: rgba(63, 185, 80, 0.18); color: var(--ok); }
.badge.stub  { background: rgba(210, 153, 34, 0.18); color: var(--warn); }
.badge.future{ background: rgba(139, 148, 158, 0.15); color: var(--fg-muted); }

.warn-banner {
  background: rgba(210, 153, 34, 0.1);
  border: 1px solid rgba(210, 153, 34, 0.35);
  color: var(--fg);
  padding: 10px 14px;
  border-radius: 6px;
  font-size: 13px;
  margin: 16px 0;
}

/* ---- Forms / playground ---- */

label { display: block; font-size: 12px; color: var(--fg-muted); margin-bottom: 4px; font-weight: 600; letter-spacing: 0.02em; text-transform: uppercase; }
input[type="text"], input[type="password"], input[type="number"], select, textarea {
  width: 100%;
  background: var(--bg-elev-2);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px 10px;
  font-family: var(--font-sans);
  font-size: 14px;
  outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--link); }
textarea { font-family: var(--font-mono); font-size: 13px; min-height: 120px; resize: vertical; }

button {
  background: var(--accent);
  color: var(--accent-ink);
  border: none;
  border-radius: 6px;
  padding: 9px 16px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
}
button:hover { filter: brightness(1.08); }
button.secondary { background: var(--bg-elev-2); color: var(--fg); border: 1px solid var(--border); }
button:disabled { opacity: 0.5; cursor: not-allowed; }

.field-row { margin-bottom: 14px; }
.field-row-inline { display: flex; gap: 12px; align-items: flex-end; margin-bottom: 14px; }
.field-row-inline > .field-row { flex: 1; margin-bottom: 0; }

.playground {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 24px;
}
.playground .col { min-width: 0; }
.playground .col h2 { margin-top: 0; }

@media (max-width: 900px) {
  .playground { grid-template-columns: 1fr; }
}

.response-status {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
}
.response-status.ok  { background: rgba(63, 185, 80, 0.18); color: var(--ok); }
.response-status.err { background: rgba(248, 81, 73, 0.18); color: var(--err); }

.muted  { color: var(--fg-muted); }
.small  { font-size: 13px; }
.xsmall { font-size: 12px; }
.mono   { font-family: var(--font-mono); }
.right  { text-align: right; }