/* ═══════════════════════════════════════════════════════════════════════════
   Admin Dashboard — styles for admin page, dashboard stats, and invite modal
   ═══════════════════════════════════════════════════════════════════════════ */

/* ── Page Layout ─────────────────────────────────────────────────────────── */

.admin-page {
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 24px;
}

.admin-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  gap: 16px;
}

.admin-header h1 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--on-surface);
  margin: 0;
}

.admin-invite-btn {
  background: var(--surface-container-high);
  color: var(--on-surface-variant);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-md);
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.12s, color 0.12s;
}

.admin-invite-btn:hover {
  background: var(--surface-container-highest);
  color: var(--on-surface);
}

/* ── Dashboard Toolbar ──────────────────────────────────────────────────── */

.admin-toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.admin-period-select {
  width: auto;
}

/* ── Loading / Error ─────────────────────────────────────────────────────── */

.admin-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 64px 0;
  color: var(--on-surface-muted);
  font-size: 14px;
}

.admin-error {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 64px 0;
  color: var(--error);
  font-size: 14px;
}

/* ── Tab Content ────────────────────────────────────────────────────────── */

.admin-tab-content {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ── Stat Cards ──────────────────────────────────────────────────────────── */

.stat-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
}

.stat-card {
  background: var(--surface-container);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-md);
  padding: 12px 14px;
}

.stat-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--on-surface-muted);
  margin-bottom: 6px;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 700;
  color: var(--on-surface);
  line-height: 1;
  margin-bottom: 4px;
}

/* ── Trend Indicators ────────────────────────────────────────────────────── */

.trend {
  font-size: 11px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 3px;
}

.trend.up {
  color: var(--priority-low);
}

.trend.down {
  color: var(--priority-high);
}

.trend.neutral {
  color: var(--on-surface-muted);
}

/* ── Subsections ────────────────────────────────────────────────────────── */

.admin-subsection {
  background: var(--surface-container);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-md);
  padding: 14px 16px;
}

.admin-subsection h4 {
  font-size: 11px;
  font-weight: 600;
  color: var(--on-surface-muted);
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ── Two-column layout ──────────────────────────────────────────────────── */

.admin-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.admin-columns > .admin-subsection {
  min-width: 0;
}

/* ── Sparkline Container ────────────────────────────────────────────────── */

.sparkline-container {
  padding: 8px 0 4px;
  overflow-x: auto;
}

.sparkline {
  display: block;
  width: 100%;
  max-width: 480px;
}

/* ── CSS Bar Charts ──────────────────────────────────────────────────────── */

.css-bar-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}

.css-bar-row:last-child {
  margin-bottom: 0;
}

.css-bar-label {
  font-size: 12px;
  color: var(--on-surface-variant);
  width: 100px;
  flex-shrink: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.css-bar-label--wide {
  width: auto;
  min-width: 100px;
  overflow: visible;
}

.css-bar-track {
  flex: 1;
  height: 4px;
  background: var(--surface-container-high);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.css-bar-fill {
  height: 100%;
  background: var(--primary-muted);
  border-radius: var(--radius-full);
  transition: width 0.3s ease;
}

.css-bar-value {
  font-size: 12px;
  font-weight: 500;
  color: var(--on-surface-muted);
  width: 36px;
  text-align: right;
  flex-shrink: 0;
}

/* ── Heatmap ─────────────────────────────────────────────────────────────── */

.heatmap {
  overflow-x: auto;
}

.heatmap-row {
  display: flex;
  align-items: center;
  gap: 3px;
  margin-bottom: 2px;
}

.heatmap-day {
  font-size: 11px;
  color: var(--on-surface-muted);
  width: 48px;
  flex-shrink: 0;
}

.heatmap-cell {
  width: 20px;
  height: 20px;
  border-radius: var(--radius-xs);
  background: var(--primary-muted);
  flex-shrink: 0;
}

/* ── Modal Backdrop ──────────────────────────────────────────────────────── */

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: var(--overlay-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  padding: 24px;
}

/* ── Invite Modal ────────────────────────────────────────────────────────── */

.invite-modal {
  background: var(--surface-container);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 680px;
  max-height: 90vh;
  overflow-y: auto;
  padding: 24px;
}

.invite-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  gap: 12px;
}

.invite-modal-header h2 {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--on-surface);
  margin: 0;
}

.modal-close {
  background: none;
  border: none;
  color: var(--on-surface-muted);
  font-size: 18px;
  cursor: pointer;
  padding: 4px 6px;
  border-radius: var(--radius-sm);
  line-height: 1;
  transition: background 0.12s, color 0.12s;
}

.modal-close:hover {
  background: var(--surface-container-high);
  color: var(--on-surface);
}

/* ── Invite Form ─────────────────────────────────────────────────────────── */

.invite-form {
  display: flex;
  gap: 12px;
  align-items: flex-end;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.invite-form label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 11px;
  font-weight: 600;
  color: var(--on-surface-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.invite-form input {
  font-size: 13px;
  padding: 6px 8px;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  background: var(--surface-container-high);
  color: var(--on-surface);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
  min-width: 160px;
}

.invite-form input:focus {
  border-color: color-mix(in srgb, var(--primary-muted) 40%, transparent);
  box-shadow: 0 0 0 3px var(--surface-tint);
}

.invite-form button {
  background: var(--primary-muted);
  color: var(--on-primary);
  border: none;
  border-radius: var(--radius-md);
  padding: 6px 14px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: filter 0.12s, opacity 0.12s;
  white-space: nowrap;
  opacity: 0.7;
}

.invite-form button:hover:not(:disabled) {
  opacity: 1;
  filter: brightness(1.06);
}

.invite-form button:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

/* ── New Invite Link ─────────────────────────────────────────────────────── */

.invite-new-link {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--surface-container-low);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  margin-bottom: 20px;
}

.invite-new-link code {
  font-family: monospace;
  font-size: 12px;
  color: var(--tertiary);
  word-break: break-all;
  flex: 1;
}

.invite-new-link button {
  background: var(--surface-container-high);
  color: var(--on-surface);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-sm);
  padding: 5px 12px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.12s;
}

.invite-new-link button:hover {
  background: var(--surface-container-highest);
}

/* ── Invite Table ────────────────────────────────────────────────────────── */

.invite-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.invite-table th {
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--on-surface-muted);
  padding: 6px 10px 8px;
  border-bottom: 1px solid var(--outline-variant);
}

.invite-table td {
  padding: 9px 10px;
  border-bottom: 1px solid color-mix(in srgb, var(--outline-variant) 50%, transparent);
  color: var(--on-surface);
  vertical-align: middle;
}

.invite-table tr:last-child td {
  border-bottom: none;
}

/* ── Status Badges ───────────────────────────────────────────────────────── */

.status-badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.status-pending {
  color: var(--priority-low);
  background: color-mix(in srgb, var(--priority-low) 15%, transparent);
}

.status-used {
  color: var(--on-surface-muted);
  background: var(--surface-container-high);
}

.status-expired {
  color: var(--priority-high);
  background: color-mix(in srgb, var(--priority-high) 15%, transparent);
}

/* ── Responsive ──────────────────────────────────────────────────────────── */

@media (max-width: 600px) {
  .stat-cards {
    grid-template-columns: repeat(2, 1fr);
  }

  .admin-columns {
    grid-template-columns: 1fr;
  }

  .heatmap-cell {
    width: 14px;
    height: 14px;
  }

  .admin-page {
    padding: 20px 16px;
  }

  .invite-modal {
    padding: 16px;
  }
}