/* rnxJS playground
   Blueprint register: drafting-paper ground, hairline rules, ink type.
   The accent is whichever backend ecosystem is selected, so the page
   takes its colour from the reader's own stack. */

:root {
  --ground: #eef1f4;
  --panel: #ffffff;
  --ink: #101418;
  --muted: #5a6672;
  --faint: #8b96a1;
  --rule: #d3dae1;
  --rule-soft: #e4e9ee;

  /* replaced at runtime by the framework switcher */
  --accent: #0c4b33;
  --accent-soft: #0c4b3314;

  --shell: min(1180px, 100% - 3rem);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: "Public Sans", ui-sans-serif, system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.shell { width: var(--shell); margin-inline: auto; }

.mono {
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  font-variant-ligatures: none;
}

/* ---------- top bar ---------- */

.topbar {
  border-bottom: 1px solid var(--rule);
  background: color-mix(in srgb, var(--panel) 70%, transparent);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 20;
}

.topbar-in {
  display: flex;
  align-items: center;
  gap: 1rem;
  min-height: 52px;
  font-size: 0.78rem;
  letter-spacing: 0.02em;
}

.wordmark { font-weight: 700; letter-spacing: -0.01em; }
.topbar .sep { color: var(--faint); }
.topbar .spacer { flex: 1; }

.chan {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.2rem 0.55rem;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--panel);
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
}

.chan[data-current="true"] { color: var(--ink); border-color: var(--ink); }
.chan:hover { border-color: var(--accent); color: var(--accent); }

.dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
  flex: none;
}

/* ---------- hero ---------- */

.hero {
  padding: clamp(3rem, 7vw, 5.5rem) 0 1.75rem;
  /* faint drafting grid, hero only */
  background-image:
    linear-gradient(to right, #00000008 1px, transparent 1px),
    linear-gradient(to bottom, #00000008 1px, transparent 1px);
  background-size: 28px 28px;
}

.eyebrow {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--faint);
  margin: 0 0 1.1rem;
}

h1.lede {
  font-family: Archivo, ui-sans-serif, system-ui, sans-serif;
  font-weight: 700;
  font-size: clamp(2.3rem, 6.2vw, 4.15rem);
  line-height: 0.98;
  letter-spacing: -0.035em;
  margin: 0;
  max-width: 17ch;
  text-wrap: balance;
}

h1.lede em { font-style: normal; color: var(--accent); }

.sub {
  margin: 1.15rem 0 0;
  max-width: 52ch;
  color: var(--muted);
  font-size: 1.05rem;
}

/* ---------- framework switcher ---------- */

.switch-row {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
  margin: 2.25rem 0 0.85rem;
}

.switch-label {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
}

/* the switcher is an rnxJS SegmentedButton; only its skin is ours */
#fw .btn {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.78rem;
  border-color: var(--rule);
  color: var(--muted);
  background: var(--panel);
}

#fw .btn.active,
#fw .btn:active,
#fw .btn.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* ---------- the split: file on the left, running on the right ---------- */

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  border: 1px solid var(--rule);
  border-radius: 10px;
  overflow: hidden;
  background: var(--panel);
  box-shadow: 0 1px 0 #ffffff inset, 0 12px 32px -24px #0a1a2a55;
}

.pane { min-width: 0; display: flex; flex-direction: column; }
.pane + .pane { border-left: 1px solid var(--rule); }

.pane-head {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.85rem;
  border-bottom: 1px solid var(--rule-soft);
  font-size: 0.74rem;
  color: var(--muted);
  background: #fbfcfd;
}

.pane-head .name { color: var(--ink); }

.code {
  margin: 0;
  padding: 1.05rem 0.85rem 1.3rem;
  font-size: 0.815rem;
  line-height: 1.75;
  overflow-x: auto;
  tab-size: 2;
  flex: 1;
}

.code .ln {
  display: inline-block;
  width: 2ch;
  margin-right: 1.15rem;
  color: #b9c3cd;
  user-select: none;
  text-align: right;
}

.code .tag { color: var(--accent); font-weight: 500; }
.code .attr { color: #6b4fbb; }
.code .tpl { color: var(--faint); }
.code .str { color: #1a7f52; }

.stage {
  padding: 1.05rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  background:
    radial-gradient(circle at 1px 1px, #dfe5eb 1px, transparent 0) 0 0 / 16px 16px;
}

.stage-note {
  font-size: 0.72rem;
  color: var(--faint);
}

/* the live table is a real rnxJS DataTable; keep our chrome off it */
.stage .datatable-wrapper,
.stage .table-responsive { background: var(--panel); border-radius: 8px; }
.stage table { margin-bottom: 0; font-size: 0.86rem; }

/* ---------- demos ---------- */

.section {
  padding: clamp(3rem, 6vw, 4.5rem) 0 1rem;
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 1.6rem;
  flex-wrap: wrap;
}

h2.section-title {
  font-family: Archivo, ui-sans-serif, system-ui, sans-serif;
  font-weight: 700;
  font-size: clamp(1.35rem, 2.6vw, 1.8rem);
  letter-spacing: -0.02em;
  margin: 0;
}

.section-note { font-size: 0.82rem; color: var(--muted); margin: 0; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(268px, 1fr));
  gap: 0.9rem;
}

a.demo {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.05rem 1.1rem 1.15rem;
  border: 1px solid var(--rule);
  border-radius: 9px;
  background: var(--panel);
  text-decoration: none;
  color: inherit;
  transition: border-color .14s ease, transform .14s ease;
}

a.demo:hover { border-color: var(--accent); transform: translateY(-2px); }
a.demo:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

a.demo h3 {
  font-family: Archivo, ui-sans-serif, system-ui, sans-serif;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.012em;
  margin: 0;
}

a.demo p { margin: 0; font-size: 0.85rem; color: var(--muted); line-height: 1.5; }

.parts { display: flex; flex-wrap: wrap; gap: 0.3rem; margin-top: auto; padding-top: 0.5rem; }

.part {
  font-family: "JetBrains Mono", ui-monospace, monospace;
  font-size: 0.68rem;
  padding: 0.12rem 0.38rem;
  border: 1px solid var(--rule-soft);
  border-radius: 4px;
  color: var(--muted);
  background: #fafbfc;
}

/* ---------- footer ---------- */

footer {
  border-top: 1px solid var(--rule);
  margin-top: 3rem;
  padding: 1.6rem 0 3.5rem;
  font-size: 0.79rem;
  color: var(--faint);
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  align-items: center;
}

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

/* ---------- responsive ---------- */

@media (max-width: 860px) {
  :root { --shell: min(1180px, 100% - 2rem); }
  .split { grid-template-columns: 1fr; }
  .pane + .pane { border-left: 0; border-top: 1px solid var(--rule); }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
  a.demo:hover { transform: none; }
}