/* Shared shell for the three-freecam demo site. */

:root {
  --bg: #0b0e14;
  --bg-raised: #121722;
  --bg-sunken: #070a0f;
  --border: #212936;
  --border-strong: #2f3a4d;
  --text: #dbe3f0;
  --text-dim: #8e9bb3;
  --text-faint: #64718a;
  --accent: #8fb7ff;
  --accent-strong: #b6d0ff;
  --accent-dim: #22304a;
  --good: #7ddba3;
  --warn: #f0c27b;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
  --radius: 10px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  color: var(--accent-strong);
  text-decoration: underline;
}

code {
  font-family: var(--mono);
  font-size: 0.875em;
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0.1em 0.38em;
}

pre {
  background: var(--bg-sunken);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.6;
}

pre code {
  background: none;
  border: 0;
  padding: 0;
  font-size: inherit;
  color: #c9d6ea;
}

/* Site chrome */

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 18px;
  flex-wrap: wrap;
  padding: 12px 20px;
  background: rgba(11, 14, 20, 0.86);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.topbar .brand {
  font-family: var(--mono);
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
}

.topbar .brand:hover {
  text-decoration: none;
  color: var(--accent);
}

.topbar nav {
  display: flex;
  gap: 16px;
  margin-left: auto;
  font-size: 14px;
  flex-wrap: wrap;
}

.topbar nav a {
  color: var(--text-dim);
}

.topbar nav a:hover,
.topbar nav a[aria-current="page"] {
  color: var(--text);
  text-decoration: none;
}

/* Article pages */

.page {
  max-width: 820px;
  margin: 0 auto;
  padding: 48px 20px 96px;
}

.page h1 {
  font-size: clamp(30px, 5vw, 42px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
}

.page h2 {
  font-size: 25px;
  letter-spacing: -0.01em;
  margin: 56px 0 14px;
  padding-top: 8px;
  border-top: 1px solid var(--border);
}

.page h3 {
  font-size: 18px;
  margin: 34px 0 10px;
}

.lede {
  font-size: 18.5px;
  color: var(--text-dim);
  margin: 0 0 28px;
}

.page ul,
.page ol {
  padding-left: 22px;
}

.page li {
  margin: 7px 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
  margin: 20px 0;
  display: block;
  overflow-x: auto;
}

th,
td {
  text-align: left;
  padding: 9px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

th {
  color: var(--text);
  font-weight: 600;
  white-space: nowrap;
}

td {
  color: var(--text-dim);
}

tbody tr:hover td {
  background: rgba(143, 183, 255, 0.04);
}

.yes {
  color: var(--good);
}

.no {
  color: var(--text-faint);
}

blockquote {
  margin: 20px 0;
  padding: 2px 0 2px 16px;
  border-left: 3px solid var(--border-strong);
  color: var(--text-dim);
}

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 40px 0;
}

/* Buttons and badges */

.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 26px 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 16px;
  border-radius: 8px;
  border: 1px solid var(--border-strong);
  background: var(--bg-raised);
  color: var(--text);
  font-size: 14.5px;
  font-weight: 500;
  cursor: pointer;
}

.btn:hover {
  border-color: var(--accent);
  color: var(--accent-strong);
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #0b0e14;
  font-weight: 600;
}

.btn-primary:hover {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
  color: #0b0e14;
}

.badges {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin: 0 0 22px;
}

.badges img {
  height: 20px;
}

/* Frequently asked questions */

details.faq {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-raised);
  margin: 8px 0;
  overflow: hidden;
}

details.faq summary {
  cursor: pointer;
  padding: 13px 16px;
  font-weight: 600;
  font-size: 15.5px;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

details.faq summary::-webkit-details-marker {
  display: none;
}

details.faq summary::after {
  content: "+";
  color: var(--text-faint);
  font-family: var(--mono);
}

details.faq[open] summary::after {
  content: "\2212";
}

details.faq[open] summary {
  border-bottom: 1px solid var(--border);
}

details.faq .answer {
  padding: 4px 16px 14px;
  color: var(--text-dim);
  font-size: 15px;
}

details.faq .answer pre {
  font-size: 13px;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 26px 20px 40px;
  text-align: center;
  color: var(--text-faint);
  font-size: 14px;
}

@media (max-width: 600px) {
  .page {
    padding: 32px 16px 72px;
  }
  .topbar nav {
    gap: 12px;
    font-size: 13px;
  }
}