/* ========= Side Panel: Base ========= */
.side-panel {
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  width: var(--panel-width);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  transform: translateX(-100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.side-panel.visible {
  transform: translateX(0);
}

/* ========= Panel Header ========= */
.side-panel-header.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 22px 8px 22px;
  backdrop-filter: blur(4px);
  background: var(--panel-header-bg);
  box-shadow: var(--panel-header-shadow);
  border-radius: var(--panel-radius) var(--panel-radius) 0 0;
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 1;
}

.side-panel-header .header-left {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 0;
  overflow: hidden;
}

.side-panel-header .header-nav-btn {
  background: none;
  border: none;
  font-size: 18px;
  color: #666;
  cursor: pointer;
  border-radius: 4px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
  flex: 0 0 auto;
  margin: 0;
}

.side-panel-header .header-nav-btn:hover {
  background: var(--color-background-alt);
  color: #222;
}

.side-panel-header .header-title {
  flex: 1 1 auto;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin: 0;
  font-size: 19px;
  font-weight: 700;
  color: #222;
  letter-spacing: -0.5px;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  text-shadow: 0 1px 0 rgba(255, 255, 255, 0.2);
  max-width: 180px;
}

.side-panel-header .header-sort {
  flex: 0 0 auto;
  margin-left: 8px;
}

.side-panel-header .sort-dropdown {
  background: var(--color-background-alt);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 4px 6px;
  font-size: 11px;
  font-weight: 500;
  color: #444;
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  width: 105px;
  max-width: 105px;
}

.side-panel-header .sort-dropdown option {
  font-size: 12px;
}

.side-panel-header .sort-dropdown:hover {
  background: var(--color-background-hover);
  border-color: var(--color-border-dark);
}

.side-panel-header .sort-dropdown:focus {
  outline: none;
  border-color: #3b82f6;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.side-panel-header .sort-dropdown option.pro-locked {
  color: #888;
}


.side-panel-header .panel-close {
  background: none;
  border: none;
  font-size: 22px;
  color: #888;
  cursor: pointer;
  border-radius: 50%;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s;
  flex: 0 0 auto;
  margin: 0;
}

.side-panel-header .panel-close:hover {
  background: var(--color-background-alt);
  color: #222;
}


/* ========= Property List ========= */
.side-panel .property-list {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0;
  overflow-y: auto;
  padding: 0;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border) transparent;
  min-height: 0;
}

/* ========= Upgrade Banner Container ========= */
.upgrade-banner-container {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--panel-header-bg);
  backdrop-filter: blur(4px);
}

/* ========= Upgrade Banner ========= */
.upgrade-banner {
  background: linear-gradient(135deg, #e0f2fe 0%, #dbeafe 100%);
  border-bottom: 1px solid #bfdbfe;
  border-radius: 0;
  padding: 12px 16px;
  margin: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  box-shadow: 0 1px 3px rgba(59, 130, 246, 0.1);
}

.upgrade-banner-content {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 0;
}

.upgrade-banner-icon {
  font-size: 18px;
  flex-shrink: 0;
}

.upgrade-banner-text {
  color: #1e40af;
  font-size: 13px;
  line-height: 1.4;
  font-weight: 500;
}

.upgrade-banner-button {
  background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
  color: white;
  border: none;
  padding: 8px 16px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
  box-shadow: 0 2px 4px rgba(59, 130, 246, 0.2);
}

.upgrade-banner-button:hover {
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  box-shadow: 0 4px 8px rgba(59, 130, 246, 0.3);
  transform: translateY(-1px);
}

@media (max-width: 768px) {
  .upgrade-banner {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .upgrade-banner-button {
    width: 100%;
  }
}


/* ========= Scrollbars ========= */
.property-list::-webkit-scrollbar {
  width: 6px;
}

.property-list::-webkit-scrollbar-track {
  background: var(--color-background-hover);
  border-radius: 3px;
}

.property-list::-webkit-scrollbar-thumb {
  background: var(--color-border-dark);
  border-radius: 3px;
}

.property-list::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

.side-panel .property-list::-webkit-scrollbar-track {
  background: transparent;
}

.side-panel .property-list::-webkit-scrollbar-thumb {
  background-color: var(--color-border);
  border-radius: 6px;
}

/* ========= Empty State ========= */
.side-panel .empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 200px;
  color: var(--color-text-muted);
  text-align: center;
  padding: var(--spacing-lg);
}

.side-panel .empty-state i {
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}

.side-panel .empty-state p {
  margin: 0;
  font-size: 0.9rem;
}

/* ========= Mobile Responsive ========= */
@media (max-width: 768px) {
  .panel-close {
    position: static !important;
    right: unset !important;
    top: unset !important;
    margin-left: auto;
    align-self: center;
    z-index: 1;
  }

  .side-panel-header .sort-dropdown {
    font-size: 12px;
    padding: 5px 8px;
    min-width: 120px;
  }

  .side-panel {
    top: auto;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 50vh;
    transform: translateY(100%);
    transition: transform 0.3s ease;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  }

  .side-panel.expanded {
    transform: translateY(0);
  }

  .side-panel .header {
    padding: var(--spacing-sm) var(--spacing-md);
  }

  .side-panel .content {
    padding: var(--spacing-sm);
    max-height: calc(50vh - 60px);
  }
}

/* ========= Side Panel Detail View ========= */
.side-panel-detail-content {
  width: 100%;
  max-width: none;
  height: 100%;
}

.side-panel-detail-content .listing-popup {
  max-height: none !important;
  height: 100%;
  border-radius: 0;
  background: transparent;
}

.side-panel-detail-content .popup-content {
  height: 100%;
}

.side-panel-back-button {
  background: #f1f5f9;
  border: 1px solid #e2e8f0;
  border-radius: 4px;
  font-size: 12px;
  cursor: pointer;
  color: #475569;
  padding: 4px 8px;
  display: flex;
  align-items: center;
  gap: 4px;
  margin-right: 8px;
  font-weight: 500;
  transition: all 0.2s ease;
}

.side-panel-back-button:hover {
  background: #e2e8f0;
  color: #334155;
}

  .panel-close {
    position: absolute;
    right: var(--spacing-md);
    top: var(--spacing-md);
    background: none;
    border: none;
    font-size: var(--text-lg);
    color: var(--color-text-secondary);
    cursor: pointer;
    padding: var(--spacing-xs);
    z-index: 2;
  }

  .panel-close:hover {
    color: var(--color-text-primary);
  }

  .filter-panel.visible+.side-panel {
    bottom: 40vh;
  }
}