:root {
  --bg: #f6f8fb;
  --card: #ffffff;
  --ink: #1a202c;
  --muted: #5a6578;
  --border: #d1d5db;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --danger: #dc2626;
  --danger-dark: #b91d1d;
  --success: #16a34a;
  --success-bg: #dcfce7;
  --warning: #d97706;
  --warning-bg: #fffbeb;
  --radius: 12px;
  --shadow: 0 4px 12px rgba(0,0,0,0.06);
  --max-width: 760px;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.45;
  display: flex;
  flex-direction: column;
}

button, input, select, textarea {
  font: inherit;
}

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

.app-header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 16px;
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.logo { font-size: 1.8rem; }
.brand h1 { margin: 0; font-size: 1.4rem; }
.tagline { margin: 4px 0 0; font-size: 0.85rem; color: var(--muted); }

#view {
  flex: 1;
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: 16px;
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
  margin-bottom: 16px;
}

.card h2 { margin-top: 0; font-size: 1.2rem; }
.card h3 { font-size: 1rem; margin: 20px 0 10px; }

.hint { color: var(--muted); font-size: 0.9rem; margin-top: -6px; }

.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 12px;
}

.field label { font-size: 0.85rem; font-weight: 600; color: var(--muted); }

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

textarea { resize: vertical; min-height: 72px; }

.btn-primary, .btn-secondary, .btn-danger, .icon-btn {
  border: none;
  border-radius: 8px;
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-primary:disabled { opacity: 0.6; cursor: not-allowed; }

.btn-secondary {
  background: var(--bg);
  color: var(--ink);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: #e5e7eb; }

.btn-danger {
  background: var(--danger);
  color: #fff;
}
.btn-danger:hover { background: var(--danger-dark); }

.icon-btn {
  background: transparent;
  color: var(--muted);
  font-size: 1.4rem;
  line-height: 1;
  padding: 4px 8px;
}

.empty-state {
  text-align: center;
  padding: 40px 16px;
  color: var(--muted);
}

.loading {
  text-align: center;
  padding: 40px 16px;
  color: var(--muted);
}

.error-box {
  background: #fee2e2;
  border: 1px solid #fecaca;
  color: #991b1b;
  border-radius: 8px;
  padding: 12px 14px;
  margin-bottom: 14px;
}

.success-box {
  background: var(--success-bg);
  border: 1px solid #86efac;
  color: #166534;
  border-radius: 8px;
  padding: 14px;
  margin-bottom: 14px;
}

.warning-box {
  background: var(--warning-bg);
  border: 1px solid #fde68a;
  color: #92400e;
  border-radius: 8px;
  padding: 12px 14px;
  margin-bottom: 14px;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.section-head h2 { margin: 0; }

/* Landing */
.landing-options {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.landing-options .card {
  margin-bottom: 0;
}

/* Public event */
.event-header h2 { margin-bottom: 6px; }
.event-meta { color: var(--muted); font-size: 0.95rem; margin-bottom: 6px; }
.event-description { margin-bottom: 12px; }

.day-heading {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--muted);
  margin: 24px 0 10px;
  padding-bottom: 6px;
  border-bottom: 2px solid var(--primary);
}

.slot-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  margin-bottom: 12px;
}

.slot-time {
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 4px;
}

.slot-label { font-weight: 600; margin-bottom: 2px; }
.slot-location, .slot-notes {
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 2px;
}

.section-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
}
.section-row:last-child { border-bottom: none; }

.section-info { flex: 1; }
.section-name { font-weight: 600; }
.section-count {
  font-size: 0.85rem;
  color: var(--muted);
}

.full-badge {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--danger);
  text-transform: uppercase;
}

.signup-form {
  background: var(--bg);
  border-radius: 8px;
  padding: 14px;
  margin-top: 12px;
}

.form-actions {
  display: flex;
  gap: 10px;
  margin-top: 14px;
}

/* Manage signup */
.detail-list {
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
}
.detail-list li {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}
.detail-list li:last-child { border-bottom: none; }
.detail-list .label { color: var(--muted); font-size: 0.9rem; }
.detail-list .value { font-weight: 600; }

/* 404 */
.not-found {
  text-align: center;
  padding: 60px 16px;
}
.not-found h2 { font-size: 1.6rem; margin-bottom: 10px; }

.app-footer {
  text-align: center;
  padding: 20px 16px;
  color: var(--muted);
  font-size: 0.85rem;
}

.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%) translateY(120%);
  background: var(--ink);
  color: #fff;
  padding: 10px 18px;
  border-radius: 999px;
  font-weight: 600;
  z-index: 30;
  opacity: 0;
  transition: transform 0.2s, opacity 0.2s;
  pointer-events: none;
}
.toast.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.tabs {
  display: flex;
  gap: 6px;
  border-bottom: 2px solid var(--border);
  margin-bottom: 16px;
  overflow-x: auto;
}

.tabs button {
  background: transparent;
  border: none;
  border-bottom: 2px solid transparent;
  padding: 10px 12px;
  font-weight: 600;
  color: var(--muted);
  cursor: pointer;
  white-space: nowrap;
}

.tabs button.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* Dashboard */
.event-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.event-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
}

.event-item h4 {
  margin: 0 0 6px;
}

.event-meta-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 0.9rem;
  color: var(--muted);
  margin-bottom: 10px;
}

.event-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* Manage console */
.console-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  flex-wrap: wrap;
}

.console-header h2 { margin: 0; }

.console-status {
  font-size: 0.85rem;
  color: var(--muted);
}

.section-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 12px 0;
}

.section-row-edit {
  display: flex;
  gap: 8px;
  align-items: center;
}

.section-row-edit input {
  flex: 1;
}

.slot-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.slot-item {
  background: var(--bg);
  border-radius: 8px;
  padding: 12px;
}

.slot-item-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
}

.slot-time { font-weight: 700; }

.capacities-grid-wrapper {
  overflow-x: auto;
  margin-top: 12px;
}

.capacities-grid {
  border-collapse: collapse;
  font-size: 0.9rem;
  min-width: 100%;
}

.capacities-grid th,
.capacities-grid td {
  border: 1px solid var(--border);
  padding: 8px;
  text-align: center;
  min-width: 90px;
}

.capacities-grid th:first-child,
.capacities-grid td:first-child {
  text-align: left;
  min-width: 140px;
}

.capacities-grid input[type="number"] {
  width: 60px;
  text-align: center;
  padding: 6px;
}

.cell-meta {
  font-size: 0.75rem;
  color: var(--muted);
  margin-top: 2px;
}

.signup-table-wrap {
  overflow-x: auto;
}

.signup-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.signup-table th,
.signup-table td {
  border: 1px solid var(--border);
  padding: 8px;
  text-align: left;
}

.signup-table th { background: var(--bg); }

.signup-filters {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.share-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.share-row {
  display: flex;
  gap: 8px;
  align-items: center;
}

.share-row input {
  flex: 1;
}

.email-warning {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px;
  background: var(--warning-bg);
  border: 1px solid #fde68a;
  border-radius: 8px;
  color: #92400e;
}

.email-ok {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px;
  background: var(--success-bg);
  border: 1px solid #86efac;
  border-radius: 8px;
  color: #166534;
}

.status-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 2px 6px;
  border-radius: 4px;
}

.status-badge.draft { background: #e5e7eb; color: #374151; }
.status-badge.open { background: var(--success-bg); color: #166534; }
.status-badge.closed { background: #fee2e2; color: #991b1b; }

.inline-form {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.inline-form input,
.inline-form select {
  flex: 1;
  min-width: 120px;
}

.count-pill {
  background: var(--bg);
  border-radius: 999px;
  padding: 2px 8px;
  font-size: 0.8rem;
}

@media (max-width: 640px) {
  :root { --radius: 10px; }
  .brand { justify-content: flex-start; text-align: left; }
  .card { padding: 16px; }
  .section-row { flex-wrap: wrap; }
  .form-actions { flex-direction: column; }
  .form-actions button { width: 100%; }
  .tabs { gap: 2px; }
  .tabs button { padding: 8px 10px; font-size: 0.9rem; }
  .capacities-grid th,
  .capacities-grid td { padding: 6px; font-size: 0.8rem; }
  .signup-table th,
  .signup-table td { padding: 6px; }
  .console-header { flex-direction: column; }
}

@media (max-width: 360px) {
  .brand h1 { font-size: 1.2rem; }
  .logo { font-size: 1.5rem; }
  input, select, textarea { padding: 9px 10px; }
}