/* Base reset & typography */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --brand:      #4F46E5;
  --brand-dark: #3730A3;
  --success:    #16A34A;
  --danger:     #DC2626;
  --warn:       #D97706;
  --gray-50:    #F9FAFB;
  --gray-100:   #F3F4F6;
  --gray-200:   #E5E7EB;
  --gray-400:   #9CA3AF;
  --gray-600:   #4B5563;
  --gray-700:   #374151;
  --gray-900:   #111827;
  --radius:     8px;
  --shadow:     0 1px 3px rgba(0,0,0,.12), 0 1px 2px rgba(0,0,0,.08);
  --shadow-md:  0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -2px rgba(0,0,0,.1);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--gray-900);
  background: var(--gray-50);
  min-height: 100vh;
}

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

img { max-width: 100%; }

/* ── Layout ─────────────────────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.container--wide { max-width: 1200px; }

/* ── Nav ─────────────────────────────────────────────────────────────────── */
.navbar {
  background: white;
  border-bottom: 1px solid var(--gray-200);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}
.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .875rem 1.25rem;
  max-width: 900px;
  margin: 0 auto;
}
.navbar__brand {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--brand);
  text-decoration: none;
}
.navbar__links { display: flex; gap: 1.5rem; font-size: .9rem; }
.navbar__links a { color: var(--gray-600); }
.navbar__links a:hover { color: var(--brand); text-decoration: none; }

/* Admin nav */
.admin-nav {
  background: var(--gray-900);
  color: white;
}
.admin-nav .navbar__brand { color: #A5B4FC; }
.admin-nav .navbar__links a { color: #D1D5DB; }
.admin-nav .navbar__links a:hover { color: white; }

/* ── Page header ─────────────────────────────────────────────────────────── */
.page-header {
  padding: 2rem 0 1rem;
}
.page-header__back {
  font-size: .875rem;
  color: var(--gray-400);
  margin-bottom: .5rem;
  display: inline-block;
}
.page-header__back:hover { color: var(--brand); }
.page-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--gray-900);
}
.page-header p {
  color: var(--gray-600);
  margin-top: .25rem;
}

/* ── Cards ────────────────────────────────────────────────────────────────── */
.card {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.card--hover { transition: box-shadow .2s; }
.card--hover:hover { box-shadow: var(--shadow-md); }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.25rem;
  padding: 1.5rem 0;
}

.event-card {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  text-decoration: none;
  color: inherit;
}
.event-card:hover { text-decoration: none; }
.event-card__name {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--gray-900);
}
.event-card__desc {
  font-size: .9rem;
  color: var(--gray-600);
  flex: 1;
}
.event-card__meta {
  font-size: .8rem;
  color: var(--gray-400);
}

/* ── Dates list ──────────────────────────────────────────────────────────── */
.date-list { padding: 1.5rem 0; display: flex; flex-direction: column; gap: .75rem; }
.date-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.25rem;
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
  transition: border-color .15s, box-shadow .15s;
}
.date-item:hover {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(79,70,229,.08);
  text-decoration: none;
}
.date-item__date { font-weight: 600; }
.date-item__slots { font-size: .875rem; color: var(--gray-400); }

/* ── Slots grid ──────────────────────────────────────────────────────────── */
.slots-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  padding: 1.5rem 0;
}
.slot-card {
  border: 2px solid var(--gray-200);
  border-radius: var(--radius);
  background: white;
  padding: 1.25rem;
  cursor: pointer;
  transition: border-color .15s, background .15s;
  text-align: center;
}
.slot-card input[type="radio"] { display: none; }
.slot-card:has(input:checked) {
  border-color: var(--brand);
  background: rgba(79,70,229,.05);
}
.slot-card--taken {
  opacity: .45;
  cursor: not-allowed;
  background: var(--gray-100);
}
.slot-card__time {
  font-size: 1.125rem;
  font-weight: 600;
}
.slot-card__price {
  font-size: .9rem;
  margin-top: .25rem;
  color: var(--gray-600);
}
.slot-card__price--free {
  color: var(--success);
  font-weight: 600;
}
.slot-card__taken-label {
  font-size: .8rem;
  color: var(--danger);
  margin-top: .25rem;
}

/* ── Forms ────────────────────────────────────────────────────────────────── */
.form-section {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1.75rem;
  margin: 1.5rem 0;
}
.form-section h2 { font-size: 1.125rem; font-weight: 600; margin-bottom: 1.25rem; }

.form-group { display: flex; flex-direction: column; gap: .35rem; margin-bottom: 1rem; }
.form-group:last-child { margin-bottom: 0; }
.form-group label { font-size: .875rem; font-weight: 500; color: var(--gray-700); }
.form-group input,
.form-group textarea,
.form-group select {
  padding: .6rem .75rem;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  font-size: .9rem;
  color: var(--gray-900);
  background: white;
  transition: border-color .15s, box-shadow .15s;
  width: 100%;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(79,70,229,.15);
}
.form-group textarea { resize: vertical; min-height: 80px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
@media (max-width: 500px) { .form-row { grid-template-columns: 1fr; } }

.field-error { font-size: .8rem; color: var(--danger); margin-top: .25rem; }

.checkbox-row { display: flex; align-items: center; gap: .5rem; }
.checkbox-row input[type="checkbox"] { width: 16px; height: 16px; }
.checkbox-row label { font-size: .9rem; font-weight: 400; color: var(--gray-700); }

/* ── Buttons ──────────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  padding: .55rem 1.1rem;
  border-radius: var(--radius);
  font-size: .9rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: background .15s, opacity .15s;
  text-decoration: none;
}
.btn:hover { text-decoration: none; opacity: .9; }
.btn:disabled { opacity: .5; cursor: not-allowed; }

.btn--primary { background: var(--brand); color: white; }
.btn--primary:hover { background: var(--brand-dark); opacity: 1; }
.btn--success { background: var(--success); color: white; }
.btn--danger  { background: var(--danger); color: white; }
.btn--ghost   { background: transparent; border: 1px solid var(--gray-200); color: var(--gray-700); }
.btn--ghost:hover { background: var(--gray-100); }
.btn--sm { padding: .35rem .75rem; font-size: .8rem; }
.btn--full { width: 100%; }

/* ── Alerts ───────────────────────────────────────────────────────────────── */
.alert {
  padding: .875rem 1.1rem;
  border-radius: var(--radius);
  font-size: .9rem;
  margin-bottom: 1rem;
  border-left: 4px solid;
}
.alert--success { background: #F0FDF4; border-color: var(--success); color: #166534; }
.alert--error   { background: #FEF2F2; border-color: var(--danger);  color: #991B1B; }
.alert--warn    { background: #FFFBEB; border-color: var(--warn);    color: #92400E; }
.alert--info    { background: #EFF6FF; border-color: #3B82F6;        color: #1E40AF; }

/* ── Badges ───────────────────────────────────────────────────────────────── */
.badge {
  display: inline-block;
  padding: .15rem .5rem;
  border-radius: 99px;
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.badge--green     { background: #DCFCE7; color: #166534; }
.badge--yellow    { background: #FEF9C3; color: #854D0E; }
.badge--red       { background: #FEE2E2; color: #991B1B; }
.badge--gray      { background: var(--gray-100); color: var(--gray-600); }
.badge--blue      { background: #DBEAFE; color: #1E40AF; }

/* ── Tables ───────────────────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .875rem; }
th {
  text-align: left;
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--gray-400);
  padding: .75rem 1rem;
  border-bottom: 1px solid var(--gray-200);
  background: var(--gray-50);
}
td {
  padding: .875rem 1rem;
  border-bottom: 1px solid var(--gray-100);
  vertical-align: middle;
}
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--gray-50); }

/* ── Stats grid (admin) ──────────────────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}
.stat-card {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1.25rem;
  text-align: center;
}
.stat-card__value { font-size: 2rem; font-weight: 700; color: var(--brand); }
.stat-card__label { font-size: .8rem; color: var(--gray-400); margin-top: .25rem; text-transform: uppercase; letter-spacing: .05em; }

/* ── Booking token box ───────────────────────────────────────────────────── */
.token-box {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  font-family: monospace;
  font-size: .9rem;
  word-break: break-all;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
}
.token-box__link { flex: 1; color: var(--brand); }

/* ── Booking summary card ────────────────────────────────────────────────── */
.booking-summary {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .75rem 2rem;
  font-size: .9rem;
  padding: 1.25rem;
}
@media (max-width: 500px) { .booking-summary { grid-template-columns: 1fr; } }
.booking-summary dt { color: var(--gray-400); font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; }
.booking-summary dd { font-weight: 500; margin-top: .15rem; }

/* ── Utility ──────────────────────────────────────────────────────────────── */
.mt-1 { margin-top: .5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: .5rem; }
.mb-2 { margin-bottom: 1rem; }
.text-center { text-align: center; }
.text-muted { color: var(--gray-400); font-size: .875rem; }
.flex { display: flex; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.flex-gap { display: flex; gap: .75rem; flex-wrap: wrap; align-items: center; }
.prose { color: var(--gray-700); line-height: 1.7; }
.prose p  { margin-bottom: .75rem; }
.prose h1, .prose h2, .prose h3 { font-weight: 600; margin: 1.25rem 0 .5rem; color: var(--gray-900); }
.prose ul, .prose ol { padding-left: 1.5rem; margin-bottom: .75rem; }
.prose li { margin-bottom: .25rem; }
.prose a  { color: var(--brand); }
.prose strong { font-weight: 600; }
.prose em { font-style: italic; }
.prose code { background: var(--gray-100); padding: .1em .35em; border-radius: 3px; font-size: .875em; }
.prose hr { border: none; border-top: 1px solid var(--gray-200); margin: 1rem 0; }
.empty-state { text-align: center; padding: 3rem 1rem; color: var(--gray-400); }
.empty-state p { margin-top: .5rem; font-size: .9rem; }

/* ── Footer ───────────────────────────────────────────────────────────────── */
footer {
  margin-top: 4rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--gray-200);
  text-align: center;
  font-size: .8rem;
  color: var(--gray-400);
}

main { padding-bottom: 2rem; }