/* Shared styling for /demos/* pages. Same palette as /web/index.html so the
   gallery feels like one site. Tweaked: adds .grid, .card, .kpi, etc. used
   across the four demos. */

:root {
  color-scheme: dark light;
  --fg: #e6e6e6;
  --fg-dim: #9aa0a6;
  --bg: #1b1d20;
  --bg-elev: #25282c;
  --border: #3a3f44;
  --accent: #7aa2f7;
  --accent-2: #bb9af7;
  --err: #f7768e;
  --ok: #9ece6a;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --shadow: 0 1px 2px rgba(0,0,0,0.3);
}
@media (prefers-color-scheme: light) {
  :root {
    --fg:#1a1a1a; --fg-dim:#555; --bg:#fafafa; --bg-elev:#fff;
    --border:#d0d4d9; --accent:#0b62d6; --accent-2:#7c3aed;
    --err:#c0392b; --ok:#1f7a3a;
    --shadow: 0 1px 2px rgba(0,0,0,0.08);
  }
}
* { box-sizing: border-box; }
html, body {
  background: var(--bg); color: var(--fg);
  margin: 0; padding: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}
body::before {
  content: "";
  position: fixed; inset: 0 0 auto 0; height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  z-index: 10;
}

main { max-width: 1040px; margin: 0 auto; padding: 28px 18px 56px; }
header { margin-bottom: 18px; }
h1 { margin: 0 0 6px; font-size: 24px; font-weight: 700; letter-spacing: -0.01em; }
h2 {
  margin: 22px 0 8px; font-size: 11px; font-weight: 700;
  color: var(--fg-dim); text-transform: uppercase; letter-spacing: 0.08em;
}
p.lede { margin: 0; color: var(--fg-dim); font-size: 14px; line-height: 1.55; }
p.lede a { color: var(--accent); text-decoration: none; border-bottom: 1px dotted currentColor; }
p.lede a:hover { color: var(--accent-2); }

.crumb { font-size: 12px; color: var(--fg-dim); margin-bottom: 12px; }
.crumb a { color: var(--accent); text-decoration: none; }
.crumb a:hover { text-decoration: underline; }

textarea, pre, select, input[type=text], input[type=email], input[type=tel],
input[type=password], input[type=number] {
  width: 100%;
  background: var(--bg-elev); color: var(--fg);
  border: 1px solid var(--border); border-radius: 8px;
  padding: 10px 12px;
  font-family: var(--mono); font-size: 13px; line-height: 1.5;
  box-shadow: var(--shadow);
}
input[type=text], input[type=email], input[type=tel], input[type=password],
input[type=number] {
  font-family: inherit; font-size: 14px;
}
textarea { resize: vertical; min-height: 220px; }
textarea:focus, select:focus, input:focus, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
  border-color: var(--accent);
}

button {
  background: var(--accent); color: #0b0f14;
  border: 0; border-radius: 8px;
  padding: 8px 14px;
  font-weight: 600; font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  box-shadow: var(--shadow);
  transition: filter 0.12s ease;
}
button:hover:not(:disabled) { filter: brightness(1.08); }
button:disabled { opacity: 0.5; cursor: progress; }
button.secondary {
  background: var(--bg-elev); color: var(--fg);
  border: 1px solid var(--border);
}

.row { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin: 12px 0 6px; }
.status { color: var(--fg-dim); font-size: 13px; }
.status.err { color: var(--err); }
.status.ok { color: var(--ok); }

pre {
  min-height: 120px; max-height: 380px;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-word;
}
pre.empty { color: var(--fg-dim); }
pre.error { color: var(--err); }

/* Cards (demo index, dashboard KPIs, etc.) */
.grid { display: grid; gap: 14px; }
.cards-3 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.cards-4 { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); }

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px 16px;
  box-shadow: var(--shadow);
}
.card h3 { margin: 0 0 4px; font-size: 14px; }
.card p { margin: 0; color: var(--fg-dim); font-size: 13px; line-height: 1.45; }
.card a { color: var(--accent); text-decoration: none; }
.card a:hover { color: var(--accent-2); }
.card.kpi .label { font-size: 11px; color: var(--fg-dim); text-transform: uppercase; letter-spacing: 0.06em; }
.card.kpi .value { font-size: 22px; font-weight: 700; margin-top: 4px; }

a.card-link { display: block; text-decoration: none; color: inherit; }
a.card-link:hover .card { border-color: var(--accent); }

/* Form field (validation demo) */
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 12px; color: var(--fg-dim); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 4px; }
.field .hint { font-size: 12px; margin-top: 4px; min-height: 16px; }
.field .hint.ok { color: var(--ok); }
.field .hint.err { color: var(--err); }
.field input.ok { border-color: var(--ok); }
.field input.err { border-color: var(--err); }

/* Two-column code+output layout (playground) */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
@media (max-width: 760px) {
  .split { grid-template-columns: 1fr; }
}

/* Example sidebar (playground) */
.playground-layout {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 16px;
}
@media (max-width: 760px) {
  .playground-layout { grid-template-columns: 1fr; }
}
ul.examples {
  list-style: none;
  margin: 0; padding: 0;
  display: flex; flex-direction: column; gap: 6px;
}
@media (max-width: 760px) {
  ul.examples { flex-direction: row; flex-wrap: wrap; }
}
.example-btn {
  background: var(--bg-elev); color: var(--fg);
  border: 1px solid var(--border); border-radius: 6px;
  padding: 6px 10px; font-size: 13px;
  cursor: pointer; width: 100%; text-align: left;
}
.example-btn.active { background: var(--accent); color: #0b0f14; border-color: var(--accent); }

/* Sliders (simulation) */
.slider-row { display: flex; align-items: center; gap: 10px; margin: 6px 0; font-size: 13px; }
.slider-row label { flex: 0 0 160px; color: var(--fg-dim); font-size: 12px; }
.slider-row input[type=range] { flex: 1; }
.slider-row output { flex: 0 0 56px; text-align: right; font-family: var(--mono); font-size: 13px; }

canvas { background: #1e293b; border-radius: 8px; max-width: 100%; height: auto; display: block; }

footer { margin-top: 32px; color: var(--fg-dim); font-size: 12px; line-height: 1.6; }
footer a { color: var(--accent); text-decoration: none; }
footer a:hover { text-decoration: underline; }