:root {
  color-scheme: light;
  --bg: #f5f6f8;
  --card: #ffffff;
  --text: #1f2430;
  --muted: #6b7280;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --border: #e2e5ea;
  --danger: #dc2626;
  --success: #16a34a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  line-height: 1.7;
}

.container {
  max-width: 640px;
  margin: 0 auto;
  padding: 0 20px;
}

.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
}

.brand {
  font-weight: 700;
  font-size: 18px;
  color: var(--text);
  text-decoration: none;
}

main.container { padding: 32px 20px 64px; }

.site-footer {
  text-align: center;
  color: var(--muted);
  font-size: 12px;
  padding: 24px 0;
}

h1 { font-size: 22px; margin: 0 0 8px; }
h2 { font-size: 18px; margin: 24px 0 8px; }
p.lead { color: var(--muted); margin: 0 0 24px; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 16px;
}

.lot-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 12px;
}

.lot-item .meta { color: var(--muted); font-size: 13px; }

form .field { margin-bottom: 18px; }

label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 6px; }
label .req { color: var(--danger); font-size: 12px; margin-left: 4px; }

input[type="text"],
input[type="email"],
input[type="tel"],
input[type="date"],
select,
textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  background: #fff;
  color: var(--text);
}

textarea { resize: vertical; min-height: 80px; }

.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: 8px;
  border: none;
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}

.btn:hover { background: var(--primary-dark); }
.btn.block { width: 100%; text-align: center; }
.btn.danger { background: var(--danger); }
.btn.secondary { background: #fff; color: var(--text); border: 1px solid var(--border); }

.alert {
  padding: 12px 16px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 14px;
}
.alert.error { background: #fef2f2; color: var(--danger); border: 1px solid #fecaca; }
.alert.success { background: #f0fdf4; color: var(--success); border: 1px solid #bbf7d0; }

.terms-box {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  max-height: 320px;
  overflow-y: auto;
  background: #fafafa;
  font-size: 13px;
  margin-bottom: 16px;
}
.terms-box h3 { font-size: 14px; margin: 16px 0 4px; }
.terms-box p { margin: 4px 0; }

.checkbox-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 20px;
}
.checkbox-row input { margin-top: 4px; }

table.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background: var(--card);
}
table.data-table th, table.data-table td {
  border-bottom: 1px solid var(--border);
  padding: 10px 8px;
  text-align: left;
}
table.data-table th { color: var(--muted); font-weight: 600; font-size: 12px; }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}
.badge.active { background: #ecfdf5; color: var(--success); }
.badge.cancelled { background: #f3f4f6; color: var(--muted); }

dl.summary { margin: 0; }
dl.summary dt { color: var(--muted); font-size: 12px; margin-top: 12px; }
dl.summary dd { margin: 2px 0 0; font-size: 15px; }

#card-container { margin-bottom: 16px; }

.test-banner {
  background: #fff4ce;
  color: #6b4e00;
  text-align: center;
  font-size: 13px;
  padding: 6px 12px;
}