:root {
  --bg: #fafafa;
  --fg: #1a1a1a;
  --muted: #666;
  --border: #e0e0e0;
  --link: #0b57d0;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
}

a {
  color: var(--link);
}

a:focus-visible {
  outline: 2px solid var(--link);
  outline-offset: 2px;
}

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.75rem 1.5rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
}

.site-title {
  font-weight: 700;
  color: var(--fg);
  text-decoration: none;
}

.site-header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1rem;
}

.site-header nav a {
  font-size: 0.9rem;
  text-decoration: none;
}

.site-header nav a:hover,
.site-title:hover {
  text-decoration: underline;
}

main {
  max-width: 42rem;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
}

section {
  margin-bottom: 2.25rem;
}

h2 {
  font-size: 1.35rem;
  line-height: 1.3;
  margin: 0 0 0.75rem;
}

p {
  margin: 0 0 0.75rem;
}

ul {
  margin: 0 0 0.75rem;
  padding-left: 1.25rem;
}

li {
  margin-bottom: 0.35rem;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 0.5rem 0 1rem;
}

.tbd {
  color: var(--muted);
  font-style: italic;
}

.section-logo {
  width: 14rem;
  max-width: 100%;
  margin: 0 0 1rem;
}

.video {
  margin: 0 0 1.5rem;
}

.video-title {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.yt-icon {
  width: 1.15em;
  height: 1.15em;
  flex: none;
  color: #ff0000;
}

.video-embed {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

.video-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.25rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.875rem;
}

.site-footer p {
  margin: 0.25rem 0;
}