:root { --ink: #1a1a1a; --muted: #5b6270; --line: #d9dde3; --accent: #1a4d8f; --banner: #fff4d6; --bg: #ffffff; }
* { box-sizing: border-box; }
body { margin: 0; font-family: Inter, system-ui, -apple-system, "Segoe UI", Arial, sans-serif; color: var(--ink); background: var(--bg); line-height: 1.5; }
.demo-banner { background: var(--banner); border-bottom: 1px solid var(--line); padding: 8px 16px; font-size: 14px; }
.demo-header { display: flex; flex-wrap: wrap; gap: 8px; justify-content: space-between; align-items: center; padding: 12px 16px; border-bottom: 1px solid var(--line); }
.demo-title { font-weight: 600; letter-spacing: -0.01em; }
.demo-sign-out { display: flex; gap: 8px; align-items: center; margin: 0; }
.demo-main { max-width: 480px; margin: 32px auto; padding: 0 16px; }
.stack { display: flex; flex-direction: column; gap: 8px; }
input[type=email] { font: inherit; padding: 10px 12px; border: 1px solid var(--line); border-radius: 6px; width: 100%; }
button { font: inherit; padding: 10px 16px; border: 0; border-radius: 6px; background: var(--accent); color: #fff; cursor: pointer; }
.demo-sign-out button { padding: 4px 10px; font-size: 14px; }
.muted { color: var(--muted); font-size: 14px; overflow-wrap: anywhere; }
.problem { color: #9b1c1c; }
a { color: var(--accent); }