:root {
  --bg: #f6f7f9;
  --fg: #1f2933;
  --muted: #6b7280;
  --card: #ffffff;
  --line: #e5e7eb;
  --accent: #2563eb;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans KR", sans-serif;
  background: var(--bg);
  color: var(--fg);
  font-size: 15px;
  line-height: 1.5;
}
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 16px; background: var(--card); border-bottom: 1px solid var(--line);
}
.brand { font-weight: 700; color: var(--fg); text-decoration: none; }
.container { max-width: 960px; margin: 24px auto; padding: 0 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 20px; }
h1 { font-size: 1.3rem; margin: 0 0 8px; }
.kv { display: grid; grid-template-columns: 90px 1fr; gap: 6px 12px; margin: 16px 0 0; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; }
button {
  font: inherit; padding: 4px 10px; border: 1px solid var(--line); border-radius: 6px;
  background: var(--card); cursor: pointer; margin-left: 8px;
}
button:hover { border-color: var(--accent); color: var(--accent); }