:root {
  --color-bg: #f5f6f8;
  --color-surface: #ffffff;
  --color-border: #d9dde3;
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-text: #1f2937;
  --color-muted: #6b7280;
  --color-danger: #dc2626;
  --color-success: #059669;
  --radius: 8px;
  font-family: -apple-system, BlinkMacSystemFont, "Malgun Gothic", "Apple SD Gothic Neo", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--color-bg); color: var(--color-text); }
body { font-size: 15px; line-height: 1.5; }

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.app-header h1 { font-size: 18px; margin: 0; }
.app-header .user-info { font-size: 13px; color: var(--color-muted); display: flex; gap: 10px; align-items: center; }

.container { max-width: 960px; margin: 0 auto; padding: 16px; }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 16px;
}
.card h2 { font-size: 16px; margin: 0 0 12px; }

.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; }
.form-grid.cols-2 { grid-template-columns: 1fr 1fr; }
.form-grid.cols-1 { grid-template-columns: 1fr; }
.field { display: flex; flex-direction: column; gap: 4px; }
.field label { font-size: 13px; color: var(--color-muted); }
.field input, .field select, .field textarea {
  width: 100%;
  padding: 8px 10px;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  font-size: 14px;
  background: var(--color-surface);
  color: var(--color-text);
}
.field textarea { resize: vertical; min-height: 48px; font-family: inherit; }
.field .error { color: var(--color-danger); font-size: 12px; min-height: 16px; }

.toggle-group { display: flex; gap: 8px; align-items: center; }
.toggle-group button {
  flex: 1;
  padding: 6px 10px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
}
.toggle-group button.active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.toggle-group .restore-btn { flex: none; font-size: 12px; color: var(--color-muted); background: none; border: none; text-decoration: underline; cursor: pointer; }

button.primary {
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 10px 18px;
  font-size: 14px;
  cursor: pointer;
}
button.primary:hover { background: var(--color-primary-dark); }
button.primary.btn-large { padding: 16px 32px; font-size: 18px; font-weight: 600; border-radius: 8px; min-width: 240px; }
button.primary:disabled { background: #93a3ba; cursor: not-allowed; }
button.secondary {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 8px 14px;
  font-size: 13px;
  cursor: pointer;
}
button.link { background: none; border: none; color: var(--color-primary); cursor: pointer; padding: 0; font-size: 13px; }

.summary-bar { display: flex; gap: 20px; flex-wrap: wrap; margin-bottom: 12px; font-size: 14px; }
.summary-bar .item strong { display: block; font-size: 18px; }

table.records { width: 100%; border-collapse: collapse; font-size: 13px; }
table.records th, table.records td { padding: 8px 6px; border-bottom: 1px solid var(--color-border); text-align: left; white-space: nowrap; }
table.records th { color: var(--color-muted); font-weight: 600; }
table.records td.detail { white-space: normal; max-width: 260px; }
table.records tr:hover { background: #f9fafb; }
.table-scroll { overflow-x: auto; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 11px; }
.badge.night { background: #312e81; color: #fff; }
.badge.holiday { background: #be123c; color: #fff; }
.badge.manual { border: 1px solid currentColor; }

.banner { padding: 10px 14px; border-radius: 6px; font-size: 13px; margin-bottom: 12px; }
.banner.error { background: #fee2e2; color: #991b1b; }
.banner.success { background: #dcfce7; color: #166534; }
.banner.info { background: #e0e7ff; color: #3730a3; }

.tabs { display: flex; gap: 4px; margin-bottom: 16px; }
.tabs button { padding: 8px 16px; border: 1px solid var(--color-border); background: var(--color-surface); border-radius: 6px 6px 0 0; cursor: pointer; font-size: 14px; }
.tabs button.active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }

.hidden { display: none !important; }

@media (max-width: 640px) {
  .app-header h1 { font-size: 16px; }
  table.records th, table.records td { font-size: 12px; padding: 6px 4px; }
}