:root {
  --bg: #f6f7f9;
  --fg: #1f2430;
  --muted: #6b7280;
  --card: #ffffff;
  --border: #e3e6ea;
  --accent: #2563eb;
  --danger: #dc2626;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
}

header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
}

nav {
  max-width: 960px;
  margin: 0 auto;
  padding: 0.75rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  font-weight: 600;
  color: var(--fg);
  text-decoration: none;
}

main {
  max-width: 960px;
  margin: 2rem auto;
  padding: 0 1rem;
}

h1 { font-size: 1.4rem; margin: 0 0 1rem; }

.page-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 1rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
}

.narrow { max-width: 480px; margin: 0 auto; }

label { display: block; margin: 0.9rem 0 0.25rem; font-weight: 500; }

input[type="password"], input[type="date"], select {
  width: 100%;
  padding: 0.5rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  font: inherit;
  background: #fff;
}

button, .button {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--card);
  color: var(--fg);
  font: inherit;
  cursor: pointer;
  text-decoration: none;
}

button.primary, .button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

button.link {
  border: none;
  background: none;
  margin: 0;
  padding: 0;
  color: var(--accent);
  text-decoration: underline;
}

button.link.danger { color: var(--danger); }

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

th, td {
  padding: 0.55rem 0.75rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
  font-size: 0.95rem;
}

th { background: #fafbfc; font-weight: 600; }
tbody tr:last-child td { border-bottom: none; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
td.memo { color: var(--muted); max-width: 16rem; overflow-wrap: anywhere; }

.error { color: var(--danger); }
.hint { color: var(--muted); font-size: 0.9rem; }

dl { display: grid; grid-template-columns: max-content 1fr; gap: 0.25rem 1.25rem; margin: 0 0 1rem; }
dt { font-weight: 600; }
dd { margin: 0; }