:root { color-scheme: light dark; }

body {
  max-width: 1040px;
  margin: 0 auto;
  padding: 24px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
  border-bottom: 1px solid #d0d7de;
}

a { color: #0969da; text-decoration: none; }
a:hover { text-decoration: underline; }
.error { color: #cf222e; }
.login { max-width: 360px; }
.login label { display: block; margin-top: 12px; }
.login input { width: 100%; box-sizing: border-box; padding: 8px; margin-top: 4px; }
.login button { margin-top: 16px; padding: 8px 14px; }
.hidden { display: none; }