/* corium site — reactive purple theme (Solarized-like, violet tones).
 *
 * Light: very dark purple text on pale lavender.
 * Dark:  pale lavender text on deep aubergine (roughly inverted).
 *
 * The palette is driven by custom properties set in three places:
 *   :root                          → light (default)
 *   @media (prefers-color-scheme)  → follows the system when unset
 *   :root[data-theme="…"]          → explicit manual override (wins)
 * Icon visibility (--show-sun/--show-moon) rides the same blocks, so the
 * toggle shows the right glyph — including live OS changes in system mode. */

:root {
  --bg: #f3eefb;
  --bg-soft: #e9e0f6;
  --bg-softer: #ddd0f0;
  --fg: #241541;
  --fg-muted: #5b4a86;
  --border: #d4c6ec;
  --accent: #6d28d9;
  --accent-hover: #5b1fc4;
  --shadow: rgba(60, 30, 110, 0.12);
  --theme-name: "light";
  --show-sun: none;
  --show-moon: inline-block;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --bg: #17102b;
    --bg-soft: #201631;
    --bg-softer: #2b1f45;
    --fg: #e6dcf7;
    --fg-muted: #a996cc;
    --border: #362a52;
    --accent: #c4b5fd;
    --accent-hover: #d6c7ff;
    --shadow: rgba(0, 0, 0, 0.4);
    --theme-name: "dark";
    --show-sun: inline-block;
    --show-moon: none;
  }
}

:root[data-theme="light"] {
  --bg: #f3eefb;
  --bg-soft: #e9e0f6;
  --bg-softer: #ddd0f0;
  --fg: #241541;
  --fg-muted: #5b4a86;
  --border: #d4c6ec;
  --accent: #6d28d9;
  --accent-hover: #5b1fc4;
  --shadow: rgba(60, 30, 110, 0.12);
  --theme-name: "light";
  --show-sun: none;
  --show-moon: inline-block;
}

:root[data-theme="dark"] {
  --bg: #17102b;
  --bg-soft: #201631;
  --bg-softer: #2b1f45;
  --fg: #e6dcf7;
  --fg-muted: #a996cc;
  --border: #362a52;
  --accent: #c4b5fd;
  --accent-hover: #d6c7ff;
  --shadow: rgba(0, 0, 0, 0.4);
  --theme-name: "dark";
  --show-sun: inline-block;
  --show-moon: none;
}

* { box-sizing: border-box; }

html { color-scheme: light dark; }

body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: clamp(2rem, 6vw, 4.5rem) 1.25rem 4rem;
}

.mono {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

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

/* ── site header ─────────────────────────────────────────────────────── */
.site-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
}

h1 {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: clamp(2rem, 7vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--fg);
}
h1 .dot { color: var(--accent); }

.lede {
  font-size: 1.05rem;
  color: var(--fg-muted);
  margin: 1rem 0 2.25rem;
  max-width: 40ch;
}

/* ── link list ───────────────────────────────────────────────────────── */
.links { list-style: none; margin: 0; padding: 0; }
.links li { margin: 0; }
.links a {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  padding: 0.85rem 0.25rem;
  border-top: 1px solid var(--border);
  color: var(--fg);
}
.links li:last-child a { border-bottom: 1px solid var(--border); }
.links a:hover { color: var(--accent); text-decoration: none; }
.links .label { font-weight: 600; }
.links .desc { color: var(--fg-muted); font-size: 0.92rem; }
.links a:hover .arrow { transform: translateX(3px); }
.arrow { margin-left: auto; color: var(--accent); transition: transform 0.15s ease; }

footer {
  margin-top: 3rem;
  color: var(--fg-muted);
  font-size: 0.85rem;
}

/* ── theme toggle ────────────────────────────────────────────────────── */
#theme-toggle {
  flex: none;
  display: inline-grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: var(--bg-soft);
  color: var(--accent);
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}
#theme-toggle:hover { background: var(--bg-softer); border-color: var(--accent); }
#theme-toggle .icon { width: 1.05rem; height: 1.05rem; }
#theme-toggle .icon-sun { display: var(--show-sun); }
#theme-toggle .icon-moon { display: var(--show-moon); }

/* ── demo page ───────────────────────────────────────────────────────── */
.back { font-size: 0.9rem; color: var(--fg-muted); }
.back a { color: var(--fg-muted); }
.back a:hover { color: var(--accent); }

.field-label {
  font-weight: 600;
  margin: 1.75rem 0 0.5rem;
  font-size: 0.95rem;
}
.hint { color: var(--fg-muted); font-size: 0.85rem; font-weight: 400; }

textarea {
  width: 100%;
  min-height: 5.5rem;
  padding: 0.75rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-soft);
  color: var(--fg);
  font: 0.9rem/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  resize: vertical;
}
textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.btn-row { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.6rem; }

button.action {
  font: inherit;
  font-size: 0.88rem;
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 7px;
  background: var(--bg-soft);
  color: var(--fg);
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}
button.action:hover { background: var(--bg-softer); border-color: var(--accent); }
button.action.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
  font-weight: 600;
}
button.action.primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); }

.examples { margin-top: 0.75rem; }
.examples .chip {
  font-size: 0.82rem;
  padding: 0.3rem 0.7rem;
  color: var(--accent);
  background: transparent;
}

pre.output {
  margin-top: 0.6rem;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-soft);
  color: var(--fg);
  white-space: pre-wrap;
  word-break: break-word;
  min-height: 3rem;
  font: 0.88rem/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

details { margin-top: 1.5rem; color: var(--fg-muted); font-size: 0.9rem; }
details pre { margin: 0.5rem 0 0; }