body { font-family: system-ui, -apple-system, sans-serif; max-width: 900px;
       margin: 0 auto; padding: 0 1rem; color: #1a1a1a; }
header { display: flex; align-items: baseline; gap: 2rem;
         border-bottom: 2px solid #b31b1b; margin-bottom: 1rem; }
header h1 a { color: #b31b1b; text-decoration: none; }
nav a { margin-right: 1rem; color: #333; }
table { border-collapse: collapse; margin: 1rem 0; width: 100%; }
th, td { border: 1px solid #ccc; padding: 0.4rem 0.6rem; text-align: left; }
th { background: #f4f4f4; }
.err { color: #b31b1b; font-weight: bold; }
.ok { color: #1b7a2e; font-weight: bold; }
.warn { color: #9a6a00; }
.note { color: #666; font-size: 0.9rem; }
form { margin: 1rem 0; }
input, button { font-size: 1rem; padding: 0.35rem 0.5rem; margin: 0.15rem; }
button { background: #b31b1b; color: white; border: none; border-radius: 4px;
         cursor: pointer; }
button:hover { background: #8f1515; }
footer { margin-top: 2rem; border-top: 1px solid #ccc; color: #888;
         font-size: 0.85rem; }
code { background: #f4f4f4; padding: 0.1rem 0.3rem; }