body { font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  max-width: 900px; margin: 0 auto; padding: 0 16px 48px; color: #222; }
header { display: flex; justify-content: space-between; align-items: baseline;
  border-bottom: 2px solid #1a5c2a; padding: 12px 0; margin-bottom: 20px; }
.brand a { font-size: 1.4em; font-weight: bold; color: #1a5c2a; text-decoration: none; }
.tag { color: #666; font-size: 0.9em; margin-left: 8px; }
nav a { color: #1a5c2a; }
table { border-collapse: collapse; width: 100%; margin: 12px 0; }
th, td { border: 1px solid #ccc; padding: 8px; text-align: left; font-size: 0.95em; }
th { background: #f0f5f0; }
table.detail th { width: 220px; }
.err { color: #b00; font-weight: bold; }
.hint { color: #666; font-size: 0.85em; }
.note { color: #555; font-size: 0.9em; background: #f7f7f7; padding: 8px; border-left: 3px solid #1a5c2a; }
.btn, button { background: #1a5c2a; color: #fff; border: none; padding: 8px 16px;
  text-decoration: none; border-radius: 4px; cursor: pointer; font-size: 1em; margin-right: 6px; }
a.btn { display: inline-block; }
button:hover, a.btn:hover { background: #144a22; }
.cards { display: flex; gap: 16px; margin: 16px 0; }
.card { border: 1px solid #ccc; border-radius: 6px; padding: 16px 24px; text-align: center; }
.card .num { font-size: 2em; font-weight: bold; color: #1a5c2a; }
input, textarea, select { font-size: 1em; padding: 6px; }
ol li { margin-bottom: 8px; }