:root {
  --bg: #f7f7f9;
  --fg: #1f2430;
  --muted: #666b78;
  --accent: #2b5fd9;
  --border: #dfe2e8;
  --card: #ffffff;
  --danger: #c0392b;
  --ok: #1e8e3e;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.7;
}
a { color: var(--accent); }
header.site {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 24px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
}
header.site .brand { font-weight: bold; font-size: 18px; text-decoration: none; color: var(--fg); }
header.site nav a { margin-left: 16px; font-size: 14px; text-decoration: none; }
main {
  max-width: 880px;
  margin: 0 auto;
  padding: 32px 20px 80px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 20px;
}
h1 { font-size: 24px; margin-top: 0; }
h2 { font-size: 18px; }
label { display: block; margin-top: 14px; font-size: 14px; color: var(--muted); }
input[type=text], input[type=email], input[type=password], select, textarea {
  width: 100%;
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 14px;
  margin-top: 4px;
  font-family: inherit;
}
textarea { min-height: 100px; resize: vertical; }
button, .btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 10px 18px;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  margin-top: 18px;
}
button.secondary, .btn.secondary { background: #fff; color: var(--fg); border: 1px solid var(--border); }
.error { color: var(--danger); font-size: 14px; margin-top: 10px; }
.notice { color: var(--ok); font-size: 14px; margin-top: 10px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--border); }
.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; background: #eef1f7; color: var(--muted); }
.badge.done { background: #e5f5ea; color: var(--ok); }
.badge.failed { background: #fbe9e7; color: var(--danger); }
.badge.progress { background: #fff4e0; color: #a26a00; }
.score { font-weight: bold; }
footer.site {
  text-align: center;
  font-size: 12px;
  color: var(--muted);
  padding: 24px;
}
.checkbox-row { display: flex; align-items: flex-start; gap: 8px; margin-top: 14px; }
.checkbox-row input { width: auto; margin-top: 3px; }
.improvements li { margin-bottom: 10px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 640px) { .grid-2 { grid-template-columns: 1fr; } }