/* ── Reset & base ─────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-bg:       #ffffff;
  --color-surface:  #f8f9fa;
  --color-border:   #dee2e6;
  --color-text:     #212529;
  --color-muted:    #6c757d;
  --color-primary:  #0d6efd;
  --color-primary-h: #0b5ed7;
  --color-success:  #22c55e;
  --color-warning:  #f59e0b;
  --color-danger:   #dc3545;
  --color-danger-h: #bb2d3b;
  --color-blocked:  #e9ecef;
  --radius:         8px;
  --shadow:         0 1px 3px rgba(0,0,0,.12), 0 1px 2px rgba(0,0,0,.08);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-surface);
  min-height: 100vh;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Header ───────────────────────────────────────────────────────────────── */
.site-header {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: .75rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-text);
  text-decoration: none;
  flex: 1;
}

.site-header .brand span { color: var(--color-primary); }

.nav-links { display: flex; gap: .5rem; align-items: center; }

.user-name {
  font-size: .875rem;
  color: var(--color-muted);
  max-width: 160px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── Buttons ──────────────────────────────────────────────────────────────── */
.btn {
  display: inline-block;
  padding: .4rem .9rem;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  font-size: .875rem;
  font-weight: 500;
  line-height: 1.4;
  transition: background .12s, opacity .12s;
}

.btn-primary   { background: var(--color-primary);  color: #fff; }
.btn-primary:hover { background: var(--color-primary-h); }
.btn-outline   { background: transparent; border: 1px solid var(--color-border); color: var(--color-text); }
.btn-outline:hover { background: var(--color-surface); }
.btn-danger    { background: var(--color-danger); color: #fff; }
.btn-danger:hover { background: var(--color-danger-h); }
.btn-sm        { padding: .25rem .6rem; font-size: .8rem; }
.btn:disabled  { opacity: .5; cursor: not-allowed; }

/* Google login button */
.btn-google {
  background: #fff;
  border: 1px solid #dadce0;
  color: #3c4043;
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .5rem 1.25rem;
  border-radius: 4px;
  font-size: .9rem;
  cursor: pointer;
  transition: background .12s, box-shadow .12s;
}
.btn-google:hover { background: #f8f9fa; box-shadow: 0 1px 3px rgba(0,0,0,.15); }
.btn-google svg  { width: 18px; height: 18px; flex-shrink: 0; }

/* ── Main layout ──────────────────────────────────────────────────────────── */
.main { max-width: 1100px; margin: 0 auto; padding: 1.5rem 1.25rem; }

/* ── Club cards ───────────────────────────────────────────────────────────── */
.club-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.club-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: border-color .15s, box-shadow .15s;
}
.club-card:hover { border-color: var(--color-primary); box-shadow: 0 2px 8px rgba(13,110,253,.15); }
.club-card h2   { font-size: 1.1rem; margin-bottom: .25rem; }
.club-card .meta { font-size: .8rem; color: var(--color-muted); }

/* ── Court tabs ───────────────────────────────────────────────────────────── */
.tab-bar {
  display: flex;
  gap: .25rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.tab-btn {
  padding: .35rem .85rem;
  border-radius: 20px;
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  cursor: pointer;
  font-size: .875rem;
  transition: background .12s, border-color .12s;
}
.tab-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

/* ── Calendar slot grid ───────────────────────────────────────────────────── */
.calendar-wrap {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: var(--shadow);
}

/* FullCalendar overrides */
.fc .fc-toolbar-title { font-size: 1rem; font-weight: 600; }
.fc .fc-button        { font-size: .8rem; padding: .2rem .6rem; }

.fc-event.available-slot {
  background: var(--color-success) !important;
  border-color: var(--color-success) !important;
  cursor: pointer;
}
.fc-event.available-slot:hover {
  filter: brightness(.92);
}
.fc-event.booked-slot {
  background: var(--color-blocked) !important;
  border-color: var(--color-border) !important;
  color: var(--color-muted) !important;
  cursor: default;
}

/* ── Booking list ─────────────────────────────────────────────────────────── */
.booking-list { display: flex; flex-direction: column; gap: .75rem; }

.booking-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  box-shadow: var(--shadow);
}

.booking-card .info h3 { font-size: 1rem; margin-bottom: .2rem; }
.booking-card .info .meta { font-size: .8rem; color: var(--color-muted); }
.booking-card .ref  { font-family: monospace; font-size: .8rem; color: var(--color-muted); }

.badge {
  display: inline-block;
  padding: .15rem .5rem;
  border-radius: 20px;
  font-size: .75rem;
  font-weight: 600;
}
.badge-confirmed { background: #d1fae5; color: #065f46; }
.badge-cancelled { background: #fee2e2; color: #991b1b; }
.badge-blocked   { background: #f3f4f6; color: #6b7280; }

/* ── Modal ────────────────────────────────────────────────────────────────── */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.45);
  z-index: 200;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.modal-overlay.open { display: flex; }

.modal {
  background: var(--color-bg);
  border-radius: var(--radius);
  padding: 1.75rem;
  max-width: 440px;
  width: 100%;
  box-shadow: 0 8px 32px rgba(0,0,0,.2);
}
.modal h2 { font-size: 1.1rem; margin-bottom: 1rem; }
.modal .slot-info { background: var(--color-surface); border-radius: var(--radius); padding: .75rem 1rem; margin-bottom: 1rem; font-size: .9rem; }
.modal .slot-info strong { display: block; font-size: 1rem; margin-bottom: .15rem; }
.modal .actions { display: flex; gap: .5rem; justify-content: flex-end; margin-top: 1.25rem; }

/* ── Forms ────────────────────────────────────────────────────────────────── */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-size: .875rem; font-weight: 500; margin-bottom: .35rem; }
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: .45rem .75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: .9rem;
  background: var(--color-bg);
  color: var(--color-text);
}
.form-group input:focus,
.form-group select:focus { outline: 2px solid var(--color-primary); border-color: transparent; }

/* ── Admin layout ─────────────────────────────────────────────────────────── */
.admin-layout { display: flex; gap: 0; min-height: calc(100vh - 57px); }

.admin-sidebar {
  width: 220px;
  background: var(--color-bg);
  border-right: 1px solid var(--color-border);
  padding: 1.25rem 0;
  flex-shrink: 0;
}
.admin-sidebar a {
  display: block;
  padding: .55rem 1.25rem;
  color: var(--color-text);
  font-size: .9rem;
  text-decoration: none;
  border-left: 3px solid transparent;
  transition: background .12s, border-color .12s;
}
.admin-sidebar a:hover   { background: var(--color-surface); }
.admin-sidebar a.active  { border-color: var(--color-primary); background: #e7f0ff; color: var(--color-primary); font-weight: 600; }
.admin-sidebar .section-title { font-size: .7rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--color-muted); padding: 1rem 1.25rem .25rem; }

.admin-content { flex: 1; padding: 1.5rem; overflow: auto; }
.admin-content h1 { font-size: 1.3rem; margin-bottom: 1.25rem; }

/* ── Table ────────────────────────────────────────────────────────────────── */
.data-table { width: 100%; border-collapse: collapse; font-size: .875rem; }
.data-table th { background: var(--color-surface); font-weight: 600; text-align: left; padding: .6rem .75rem; border-bottom: 2px solid var(--color-border); }
.data-table td { padding: .6rem .75rem; border-bottom: 1px solid var(--color-border); vertical-align: middle; }
.data-table tr:last-child td { border-bottom: none; }
.data-table .actions { display: flex; gap: .35rem; }
.table-wrap { background: var(--color-bg); border-radius: var(--radius); border: 1px solid var(--color-border); box-shadow: var(--shadow); overflow: hidden; }

/* ── Page header ──────────────────────────────────────────────────────────── */
.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.25rem; }
.page-header h1 { margin: 0; }

/* ── Alerts ───────────────────────────────────────────────────────────────── */
.alert { padding: .75rem 1rem; border-radius: var(--radius); margin-bottom: 1rem; font-size: .875rem; }
.alert-success { background: #d1fae5; color: #065f46; }
.alert-error   { background: #fee2e2; color: #991b1b; }
.alert-info    { background: #dbeafe; color: #1e40af; }

/* ── Hours grid ───────────────────────────────────────────────────────────── */
.hours-grid { display: grid; grid-template-columns: 120px 1fr 1fr 80px; gap: .5rem; align-items: center; margin-bottom: .5rem; font-size: .875rem; }
.hours-grid .day-label { font-weight: 500; }

/* ── Utilities ────────────────────────────────────────────────────────────── */
.hidden  { display: none !important; }
.mt-1    { margin-top: .5rem; }
.mt-2    { margin-top: 1rem; }
.mb-1    { margin-bottom: .5rem; }
.mb-2    { margin-bottom: 1rem; }
.text-muted { color: var(--color-muted); font-size: .875rem; }
.text-center { text-align: center; }

/* ── Responsive ───────────────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .admin-layout { flex-direction: column; }
  .admin-sidebar { width: 100%; border-right: none; border-bottom: 1px solid var(--color-border); padding: .5rem 0; display: flex; overflow-x: auto; }
  .admin-sidebar a { white-space: nowrap; border-left: none; border-bottom: 3px solid transparent; padding: .5rem 1rem; }
  .admin-sidebar a.active { border-bottom-color: var(--color-primary); border-left-color: transparent; }
  .admin-sidebar .section-title { display: none; }
  .booking-card { flex-direction: column; gap: .5rem; }
  .hours-grid { grid-template-columns: 100px 1fr 1fr 60px; }
}