:root { --bg: #ffffff; --fg: #1d1d1f; --muted: #5f6368; --line: #e3e3e3; --accent: #cc0000; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.6 -apple-system, "Segoe UI", Roboto, Arial, sans-serif; }
header, footer { border-bottom: 1px solid var(--line); }
footer { border-top: 1px solid var(--line); border-bottom: 0; color: var(--muted); font-size: 14px; }
.wrap { max-width: 760px; margin: 0 auto; padding: 20px 16px; }
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: inherit; font-weight: 700; font-size: 20px; }
.brand img { width: 44px; height: 44px; border-radius: 50%; }
nav { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 10px; }
nav a, footer a { color: var(--accent); }
h1 { font-size: 30px; line-height: 1.25; margin: 12px 0; }
h2 { font-size: 20px; margin-top: 28px; }
.yt { display: inline-flex; align-items: center; gap: 8px; background: var(--accent); color: #fff; padding: 10px 16px;
      border-radius: 8px; text-decoration: none; font-weight: 600; }
.yt svg { width: 22px; height: 22px; }
.note { color: var(--muted); font-size: 14px; }