/*  Header  */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 100;
  gap: 12px;
  flex-wrap: wrap;
}

.header-left {
  display: flex;
  align-items: baseline;
  gap: 12px;
  flex-shrink: 0;
}

.header-left h1 {
  font-size: calc(16px * var(--fs-scale));
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-primary);
}

.header-left span {
  font-family: var(--font-mono);
  font-size: calc(11px * var(--fs-scale));
  color: var(--text-muted);
}

.header-left .app-version {
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.04em;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

/*  Legend  */
.header-legend {
  display: flex;
  align-items: center;
  gap: 16px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 7px;
  font-size: calc(11px * var(--fs-scale));
  color: var(--text-secondary);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 2px;
  border: 1px solid;
  flex-shrink: 0;
}

.legend-dot.occupied { background: var(--occupied-bg); border-color: var(--occupied-border); }
.legend-dot.empty    { background: var(--empty-bg);    border-color: var(--empty-border); }
.legend-dot.disabled { background: var(--disabled-bg); border-color: var(--disabled-border); }
.legend-dot.featured { background: var(--featured-bg); border-color: var(--featured-border); }

/*  Controls: theme + font size  */
.header-controls {
  display: flex;
  align-items: center;
  gap: 10px;
}

.theme-toggle {
  display: flex;
  align-items: center;
  gap: 7px;
  cursor: pointer;
  user-select: none;
}

.theme-toggle-track {
  width: 36px;
  height: 20px;
  border-radius: 10px;
  background: var(--toggle-bg);
  border: 1px solid var(--border);
  position: relative;
  transition: background 0.2s;
}

.theme-toggle-knob {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--toggle-knob);
  transition: transform 0.2s;
}

[data-theme="light"] .theme-toggle-knob {
  transform: translateX(16px);
}

.theme-toggle-icon {
  font-size: calc(14px * var(--fs-scale));
  line-height: 1;
}

.fontsize-btns {
  display: flex;
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

.fontsize-btn {
  background: var(--surface-2);
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 5px 9px;
  font-family: var(--font-ui);
  font-weight: 600;
  transition: background 0.15s, color 0.15s;
  border-right: 1px solid var(--border);
  line-height: 1;
}

.fontsize-btn:last-child { border-right: none; }
.fontsize-btn:hover { background: var(--accent-soft); color: var(--accent); }
.fontsize-btn.active { background: var(--accent); color: #fff; }

.fontsize-btn[data-size="small"]  { font-size: 10px; }
.fontsize-btn[data-size="medium"] { font-size: 13px; }
.fontsize-btn[data-size="large"]  { font-size: 16px; }

/*  Stats Bar  */
/*  User info / logout in header  */
.header-user-info {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: calc(12px * var(--fs-scale));
  color: var(--text-muted);
}
.header-user-info strong {
  font-family: var(--font-mono);
  color: var(--text-secondary);
}
.btn-header-link {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: 6px;
  padding: 5px 11px;
  font-size: calc(12px * var(--fs-scale));
  font-family: var(--font-ui);
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: border-color 0.15s, color 0.15s;
}
.btn-header-link:hover { border-color: var(--accent); color: var(--accent); }
.btn-header-logout:hover { border-color: #e05555; color: #e05555; }

/*  Admin button in stats-bar  */
.stats-bar {
  justify-content: space-between;
}

.btn-admin-panel {
  background: var(--accent-soft);
  border: 1px solid rgba(91, 141, 245, 0.4);
  color: var(--accent);
  border-radius: 7px;
  padding: 6px 14px;
  font-size: calc(12px * var(--fs-scale));
  font-family: var(--font-ui);
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  letter-spacing: 0.03em;
  transition: background 0.15s, border-color 0.15s;
  flex-shrink: 0;
}

.btn-admin-panel:hover {
  background: rgba(91, 141, 245, 0.28);
  border-color: var(--accent);
}

[data-theme="light"] .btn-admin-panel {
  background: rgba(42, 92, 208, 0.1);
  border-color: rgba(42, 92, 208, 0.35);
  color: #2a5cd0;
}

[data-theme="light"] .btn-admin-panel:hover {
  background: rgba(42, 92, 208, 0.2);
}
.stats-left {
  display: flex;
  gap: 20px;
  align-items: center;
  flex-wrap: wrap;
}

.stats-sync {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  flex-wrap: wrap;
}

.sync-last-label {
  font-family: var(--font-mono);
  font-size: calc(11px * var(--fs-scale));
  color: var(--text-muted);
  white-space: nowrap;
}

.btn-sync-refresh,
.btn-sync-rebuild {
  border-radius: 7px;
  padding: 6px 12px;
  font-size: calc(12px * var(--fs-scale));
  font-family: var(--font-ui);
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: background 0.15s, border-color 0.15s, opacity 0.15s;
}

.btn-sync-refresh {
  background: var(--accent-soft);
  border: 1px solid rgba(91, 141, 245, 0.4);
  color: var(--accent);
}

.btn-sync-refresh:hover:not(:disabled) {
  background: rgba(91, 141, 245, 0.28);
  border-color: var(--accent);
}

.btn-sync-rebuild {
  background: rgba(224, 85, 85, 0.12);
  border: 1px solid rgba(224, 85, 85, 0.45);
  color: #e05555;
}

.btn-sync-rebuild:hover:not(:disabled) {
  background: rgba(224, 85, 85, 0.22);
}

.btn-sync-refresh:disabled,
.btn-sync-rebuild:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-sync-refresh.is-syncing,
.btn-sync-rebuild.is-syncing {
  position: relative;
  color: transparent;
  pointer-events: none;
}

.btn-sync-refresh.is-syncing::after,
.btn-sync-rebuild.is-syncing::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 14px;
  height: 14px;
  margin: -7px 0 0 -7px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: sync-btn-spin 0.7s linear infinite;
}

.btn-sync-refresh.is-syncing::after { color: var(--accent); }
.btn-sync-rebuild.is-syncing::after { color: #e05555; }

@keyframes sync-btn-spin {
  to { transform: rotate(360deg); }
}

.sync-loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: none;
  place-items: center;
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(2px);
}

.sync-loading-overlay.active {
  display: grid;
}

.sync-loading-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  padding: 24px 32px;
  border-radius: 12px;
  background: var(--popup-bg);
  border: 1px solid var(--popup-border);
  box-shadow: var(--popup-shadow);
  min-width: 220px;
}

.sync-loading-spinner {
  width: 36px;
  height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: sync-btn-spin 0.8s linear infinite;
}

.sync-loading-text {
  font-size: calc(13px * var(--fs-scale));
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
  text-align: center;
}

body.sync-in-progress {
  pointer-events: none;
}

body.sync-in-progress .sync-loading-overlay {
  pointer-events: auto;
}

.header-left .breadcrumb {
  font-family: var(--font-mono);
  font-size: calc(11px * var(--fs-scale));
  color: var(--text-muted);
}

.breadcrumb a {
  color: var(--accent);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.header-user {
  font-size: calc(12px * var(--fs-scale));
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-user strong {
  color: var(--accent);
  font-family: var(--font-mono);
}

.btn-logout {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  border-radius: 6px;
  padding: 6px 12px;
  font-size: calc(12px * var(--fs-scale));
  font-family: var(--font-ui);
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  transition: border-color 0.15s, color 0.15s;
}

.btn-logout:hover {
  border-color: var(--danger);
  color: var(--danger);
}

/* ── Sync-mode picker modal ─────────────────────────────────────────── */
.sync-mode-modal {
  background: var(--popup-bg);
  border: 1px solid var(--popup-border);
  border-radius: 14px;
  padding: 26px 28px 24px;
  width: 90%;
  max-width: 480px;
  box-shadow: var(--popup-shadow);
  position: relative;
}

.sync-mode-close {
  position: absolute;
  top: 14px;
  right: 14px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 16px;
  cursor: pointer;
  line-height: 1;
  padding: 4px 6px;
  border-radius: 5px;
  transition: color 0.15s, background 0.15s;
}
.sync-mode-close:hover { color: var(--text-primary); background: var(--surface-2); }

.sync-mode-title {
  font-size: calc(15px * var(--fs-scale));
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 4px;
}

.sync-mode-desc {
  font-size: calc(12px * var(--fs-scale));
  color: var(--text-muted);
  margin: 0 0 18px;
}

.sync-mode-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sync-mode-option {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 16px;
  border-radius: 10px;
  border: 1.5px solid var(--border);
  background: var(--surface-2);
  cursor: pointer;
  text-align: left;
  transition: border-color 0.15s, background 0.15s;
  font-family: var(--font-ui);
}

.sync-mode-option-icon {
  font-size: 20px;
  line-height: 1.2;
  flex-shrink: 0;
  width: 24px;
  text-align: center;
}

.sync-mode-option-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sync-mode-option-body strong {
  font-size: calc(13px * var(--fs-scale));
  font-weight: 700;
  color: var(--text-primary);
}

.sync-mode-option-body span {
  font-size: calc(12px * var(--fs-scale));
  color: var(--text-secondary);
  line-height: 1.5;
}

.sync-mode-option--danger {
  border-color: rgba(224, 85, 85, 0.4);
}
.sync-mode-option--danger .sync-mode-option-icon { color: #e05555; }
.sync-mode-option--danger:hover {
  border-color: #e05555;
  background: rgba(224, 85, 85, 0.08);
}

.sync-mode-option--safe {
  border-color: rgba(91, 141, 245, 0.35);
}
.sync-mode-option--safe .sync-mode-option-icon { color: var(--accent); }
.sync-mode-option--safe:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}