:root {
  --accent: #4F46E5;
  --accent-hover: color-mix(in srgb, var(--accent) 80%, black);
  --text: #111827;
  --muted: #6b7280;
  --bg: #f9fafb;
  --surface: #ffffff;
  --border: #e5e7eb;
  --danger: #dc2626;
  --success: #16a34a;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

a { color: var(--accent); }

.container { max-width: 900px; margin: 0 auto; padding: 1.5rem 1rem; }
.container--wide { max-width: 1200px; }

/* Header */
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: .75rem 1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.site-header__logo { height: 40px; object-fit: contain; }
.site-header__title { font-size: 1.125rem; font-weight: 600; }
.site-header__nav { margin-left: auto; display: flex; gap: .75rem; align-items: center; }
.site-header__nav a { color: var(--muted); text-decoration: none; font-size: .875rem; }
.site-header__nav a:hover { color: var(--text); }

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
}

/* Stat cards */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 1rem; }
.stat-card { text-align: center; }
.stat-card__value { font-size: 2rem; font-weight: 700; color: var(--accent); }
.stat-card__label { font-size: .875rem; color: var(--muted); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .375rem;
  padding: .5rem 1rem;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  font-size: .875rem;
  font-weight: 500;
  text-decoration: none;
  transition: background .15s;
}
.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: var(--accent-hover); }
.btn--secondary { background: var(--surface); color: var(--text); border: 1px solid var(--border); }
.btn--secondary:hover { background: var(--bg); }
.btn--danger { background: var(--danger); color: #fff; }
.btn--danger:hover { background: #b91c1c; }
.btn--sm { padding: .25rem .625rem; font-size: .8125rem; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* Forms */
.form-group { display: flex; flex-direction: column; gap: .375rem; margin-bottom: 1rem; }
.form-group label { font-size: .875rem; font-weight: 500; }
.form-group input,
.form-group select,
.form-group textarea {
  padding: .5rem .75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: .875rem;
  font-family: inherit;
  background: var(--surface);
  color: var(--text);
  width: 100%;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 540px) { .form-row { grid-template-columns: 1fr; } }

/* Tables */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .875rem; }
th { text-align: left; padding: .625rem .75rem; border-bottom: 2px solid var(--border); font-weight: 600; color: var(--muted); }
td { padding: .625rem .75rem; border-bottom: 1px solid var(--border); }
tr:hover td { background: var(--bg); }

/* Badges */
.badge {
  display: inline-flex;
  align-items: center;
  gap: .25rem;
  padding: .2rem .6rem;
  border-radius: 999px;
  font-size: .75rem;
  font-weight: 500;
}
.badge--green { background: #dcfce7; color: #15803d; }
.badge--blue { background: #dbeafe; color: #1d4ed8; }
.badge--gray { background: var(--bg); color: var(--muted); border: 1px solid var(--border); }

/* Search */
.search-bar {
  display: flex;
  gap: .5rem;
  margin-bottom: 1rem;
}
.search-bar input { flex: 1; }

/* Alerts */
.alert { padding: .875rem 1rem; border-radius: var(--radius); font-size: .875rem; margin-bottom: 1rem; }
.alert--error { background: #fee2e2; color: #991b1b; border: 1px solid #fca5a5; }
.alert--success { background: #dcfce7; color: #166534; border: 1px solid #86efac; }

/* Modal */
.modal-backdrop {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.4);
  display: flex; align-items: center; justify-content: center;
  z-index: 50;
}
.modal-backdrop.hidden { display: none; }
.modal {
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1.5rem;
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(0,0,0,.2);
}
.modal__header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.25rem; }
.modal__title { font-size: 1.125rem; font-weight: 600; }
.modal__close { background: none; border: none; cursor: pointer; font-size: 1.25rem; color: var(--muted); }

/* Nav tabs */
.nav-tabs { display: flex; gap: .25rem; border-bottom: 2px solid var(--border); margin-bottom: 1.5rem; }
.nav-tab {
  padding: .625rem 1rem;
  border: none;
  background: none;
  cursor: pointer;
  font-size: .875rem;
  color: var(--muted);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  text-decoration: none;
}
.nav-tab.active { color: var(--accent); border-bottom-color: var(--accent); font-weight: 500; }

/* Check-in specific */
.family-card { margin-bottom: .75rem; }
.family-card__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: .875rem 1rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
}
.family-card__children { border: 1px solid var(--border); border-top: none; border-radius: 0 0 var(--radius) var(--radius); }
.child-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .75rem 1rem;
  border-top: 1px solid var(--border);
}
.child-row:first-child { border-top: none; }

/* Print */
@media print {
  .no-print { display: none !important; }
  .site-header { display: none; }
  body { background: white; }
  .card { box-shadow: none; border: none; padding: 0; }
  table { font-size: 12px; }
}

/* Misc */
.page-title { font-size: 1.5rem; font-weight: 700; margin-bottom: 1.25rem; }
.section-title { font-size: 1.125rem; font-weight: 600; margin-bottom: 1rem; }
.text-muted { color: var(--muted); font-size: .875rem; }
.mt-1 { margin-top: .25rem; }
.mt-2 { margin-top: .5rem; }
.mt-4 { margin-top: 1rem; }
.flex { display: flex; }
.gap-2 { gap: .5rem; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.hidden { display: none !important; }