:root {
  /* Black page, white MeshTap wordmark (Robb 2026-11-03). One scheme for light and dark. */
  --bg: #000000; --panel: #0d0d0d; --ink: #f2f2f2; --muted: #a3a3a3; --line: #262626;
  --accent: #ffffff; --accent-ink: #000000; --accent-soft: #1a1a1a;
  --warn-bg: #2b2208; --warn-line: #7a6022;
  --err-bg: #2e1212;  --err-line: #7d3a3a;
  --info-bg: #111a26; --info-line: #3b5c8c;
  --radius: 12px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--bg);
  color-scheme: dark;
  /* ESP Web Tools dialog theming */
  --improv-primary-color: #3fb3d1;
  --md-sys-color-primary: #3fb3d1;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0; line-height: 1.5;
  /* Faint city-mesh background (Robb 2026-11-03: "very faint and dark/black"). */
  background: linear-gradient(rgba(0,0,0,.90), rgba(0,0,0,.90)), url("../img/bg-city-mesh.jpg") center / cover fixed, #000;
}
.wrap { max-width: 920px; margin: 0 auto; padding: 0 20px; }

.top { background: var(--panel); border-bottom: 1px solid var(--line); }
.top .wrap { padding-top: 14px; padding-bottom: 14px; }
.brand { display: flex; align-items: center; gap: .75em; font-weight: 700; font-size: 1.2rem; letter-spacing: .02em; }
.brand img { height: 34px; width: auto; display: block; }
.brand span { font-weight: 400; color: var(--muted); margin-left: .35em; }

.intro { padding: 32px 0 8px; }
.intro h1 { margin: 0 0 6px; font-size: 1.75rem; }
.intro p { margin: 0; color: var(--muted); }

.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; margin: 18px 0; }
.step { font-weight: 650; font-size: 1.05rem; display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.num { display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 50%;
  background: var(--accent); color: var(--accent-ink); font-size: .85rem; }
.muted { color: var(--muted); margin-top: 0; }

.selectors { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.selectors label { display: flex; flex-direction: column; gap: 6px; font-size: .9rem; color: var(--muted); }
select { font: inherit; color: var(--ink); background: var(--bg); border: 1px solid var(--line);
  border-radius: 8px; padding: 10px 12px; }
select:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.release { margin-top: 16px; padding: 12px 14px; background: var(--accent-soft); border-radius: 8px; }
.release-meta { display: flex; gap: 14px; align-items: center; font-weight: 600; }
.release-meta #rel-date { color: var(--muted); font-weight: 400; }
.release p { margin: 6px 0 0; white-space: pre-line; }
.release p:empty { display: none; }
.tag { font-size: .75rem; font-weight: 600; padding: 2px 8px; border-radius: 99px;
  background: var(--warn-bg); border: 1px solid var(--warn-line); }

.boards { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.board { border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; display: flex; flex-direction: column; }
.board h2 { margin: 0; font-size: 1.3rem; }
.chip { color: var(--muted); font-size: .9rem; margin-bottom: 8px; }
.board ol { padding-left: 1.2em; margin: 8px 0 14px; flex: 1; }
.board li { margin-bottom: 4px; }
.btn { font: inherit; font-weight: 650; width: 100%; padding: 12px 16px; border: 0; border-radius: 8px;
  background: var(--accent); color: var(--accent-ink); cursor: pointer; }
.btn:hover:not(:disabled) { filter: brightness(1.08); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.fine { font-size: .82rem; color: var(--muted); margin: 8px 0 0; }
.fresh { display: flex; gap: 8px; align-items: flex-start; font-size: .88rem; margin-bottom: 12px; }
.fresh input { margin-top: 3px; }

.help dl { margin: 0; }
.help dt { font-weight: 600; margin-top: 12px; }
.help dt:first-child { margin-top: 0; }
.help dd { margin: 4px 0 0; color: var(--muted); }

.notice { border-radius: 8px; padding: 12px 14px; margin: 16px 0 0; border: 1px solid; }
.notice.warn { background: var(--warn-bg); border-color: var(--warn-line); }
.notice.error { background: var(--err-bg); border-color: var(--err-line); }
.notice.info { background: var(--info-bg); border-color: var(--info-line); font-family: ui-monospace, monospace; font-size: .85rem; }

.foot { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
  color: var(--muted); font-size: .85rem; padding-top: 8px; padding-bottom: 32px; }
.foot a { color: inherit; }

@media (max-width: 680px) {
  .selectors, .boards { grid-template-columns: 1fr; }
}