:root {
  --bg: #ffffff;
  --text: #0f0f0f;
  --muted: #606060;
  --card: #f6f6f6;
  --border: #e6e6e6;
  --brand: #ff0000; /* YouTube red */
  --accent: #111111;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas,
    "Liberation Mono", "Courier New", monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Inter,
    "Helvetica Neue", Arial, "Noto Sans";
}
* {
  box-sizing: border-box;
}
html,
body {
  height: 100%;
}
body {
  margin: 0;
  font-family: var(--sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px;
}
header.hero {
  background: linear-gradient(180deg, #fff, #fff 55%, #fafafa 100%);
  border-bottom: 1px solid var(--border);
}
.hero-inner {
  display: flex;
  gap: 28px;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}
.brand {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  font-weight: 800;
  font-size: 28px;
  letter-spacing: 0.2px;
}
.dot {
  width: 14px;
  height: 14px;
  border-radius: 999px;
  background: var(--brand);
  box-shadow: 0 0 0 6px color-mix(in srgb, var(--brand) 16%, transparent);
}
.subtitle {
  color: var(--muted);
  margin-top: 6px;
}
.cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.btn {
  appearance: none;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--accent);
  border-radius: 999px;
  padding: 12px 18px;
  font-weight: 700;
  text-decoration: none;
  box-shadow: var(--shadow);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.btn:hover {
  transform: translateY(-1px);
}
.btn--brand {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
}
nav.tabs {
  display: flex;
  gap: 8px;
  overflow: auto;
  padding: 8px 0;
  margin-top: 8px;
}
nav.tabs a {
  text-decoration: none;
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--accent);
}
nav.tabs a.active {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
}
section.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  margin: 18px 0;
  box-shadow: var(--shadow);
}
h1,
h2,
h3 {
  line-height: 1.25;
  margin: 0 0 10px;
}
h2 {
  margin-top: 6px;
}
.grid {
  display: grid;
  gap: 16px;
}
@media (min-width: 880px) {
  .grid.cols-2 {
    grid-template-columns: 1fr 1fr;
  }
}
code,
pre {
  font-family: var(--mono);
}
pre {
  background: #111;
  color: #eee;
  padding: 16px;
  border-radius: 12px;
  border: 1px solid #222;
  overflow: auto;
}
table {
  width: 100%;
  border-collapse: collapse;
  border: 1px solid var(--border);
  background: #fff;
  border-radius: 12px;
  overflow: hidden;
}
th,
td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  text-align: left;
}
th {
  background: #f9f9f9;
}
.kbd {
  font-family: var(--mono);
  font-size: 0.92em;
  padding: 2px 6px;
  border: 1px solid var(--border);
  border-bottom-color: #dcdcdc;
  border-radius: 6px;
  background: #fff;
}
footer {
  padding: 28px 0;
  color: var(--muted);
  font-size: 0.95em;
  text-align: center;
}
.pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #fff;
}
.tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  background: #111;
  color: #fff;
  font-size: 0.85em;
}
.tag--brand {
  background: var(--brand);
}

/* ---------- Media + image placeholders ---------- */
.media-wrap {
  display: grid;
  gap: 18px;
}
@media (min-width: 880px) {
  .media-wrap {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: start;
  }
}

.doc-fig {
  margin: 0;
  display: grid;
  gap: 10px;
}
.doc-fig .doc-shot {
  width: 100%;
  aspect-ratio: var(--shot-ratio, 16/9);
  object-fit: cover;
  border-radius: 14px;
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.doc-fig.is-portrait .doc-shot {
  aspect-ratio: 9/16;
}

.doc-fig figcaption {
  color: var(--muted);
  font-size: 0.95rem;
}

.doc-fig .doc-shot[src$=".svg"] {
  background: #fafafa;
  outline: 2px dashed #d9d9d9;
  outline-offset: -10px;
}

.media-grid .doc-fig {
  align-self: start;
}

.doc-fig:hover .doc-shot {
  transform: translateY(-1px);
  transition: transform 0.12s ease;
}

.media-grid {
  grid-template-columns: 1.15fr 0.85fr;
  align-items: start;
}

.media-gallery {
  display: grid;
  gap: 14px;
}

@media (max-width: 879px) {
  .media-grid {
    grid-template-columns: 1fr;
  }
}