* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: #1e1e2e;
  color: #cdd6f4;
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  user-select: none;
}

/* Top Bar */
#topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 8px 16px;
  background: #181825;
  border-bottom: 1px solid #313244;
  flex-shrink: 0;
}

.topbar-title {
  font-size: 15px;
  font-weight: 700;
  color: #cba6f7;
  letter-spacing: 0.5px;
}

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

.upload-btn {
  padding: 6px 14px;
  background: #45475a;
  color: #cdd6f4;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  white-space: nowrap;
  transition: background 0.15s;
}

.upload-btn:hover {
  background: #585b70;
}

/* Main Layout */
#main {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* Left Sidebar */
#sidebar-left {
  width: 200px;
  min-width: 160px;
  background: #181825;
  border-right: 1px solid #313244;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.panel-header {
  padding: 10px 12px;
  font-size: 13px;
  font-weight: 600;
  color: #a6adc8;
  border-bottom: 1px solid #313244;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  flex-shrink: 0;
}

.panel-body {
  overflow-y: auto;
  flex: 1;
}

#file-list .file-item {
  padding: 6px 12px;
  font-size: 12px;
  cursor: pointer;
  border-bottom: 1px solid #11111b;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

#file-list .file-item:hover {
  background: #313244;
}

#file-list .file-item.active {
  background: #45475a;
  color: #f5c2e7;
  font-weight: 600;
}

/* Center */
#center {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#image-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: #11111b;
  min-height: 0;
}

#image-placeholder {
  color: #585b70;
  font-size: 16px;
}

#image-preview {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

#image-info {
  padding: 4px 12px;
  font-size: 12px;
  color: #a6adc8;
  text-align: center;
  background: #181825;
  flex-shrink: 0;
}

#nav-buttons {
  display: flex;
  gap: 8px;
  justify-content: center;
  padding: 6px;
  background: #181825;
  flex-shrink: 0;
}

#nav-buttons button {
  padding: 5px 20px;
  background: #45475a;
  color: #cdd6f4;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
}

#nav-buttons button:hover {
  background: #585b70;
}

/* Tag Area */
#tag-area {
  background: #181825;
  border-top: 1px solid #313244;
  flex-shrink: 0;
  max-height: 250px;
  display: flex;
  flex-direction: column;
}

.tag-container {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 8px 12px;
  overflow-y: auto;
  flex: 1;
  min-height: 40px;
}

.tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  background: #313244;
  color: #cdd6f4;
  border-radius: 14px;
  font-size: 12px;
  cursor: pointer;
  transition: background 0.15s;
  border: none;
}

.tag-chip:hover {
  background: #f38ba8;
  color: #1e1e2e;
}

.tag-chip .remove-x {
  font-size: 14px;
  font-weight: bold;
  margin-left: 2px;
}

#tag-input-area {
  padding: 8px 12px;
  border-top: 1px solid #313244;
  flex-shrink: 0;
}

#tag-input {
  width: 100%;
  padding: 8px 12px;
  background: #11111b;
  color: #cdd6f4;
  border: 1px solid #45475a;
  border-radius: 8px;
  font-size: 13px;
  outline: none;
}

#tag-input:focus {
  border-color: #89b4fa;
}

/* Right Sidebar */
#sidebar-right {
  width: 250px;
  min-width: 200px;
  background: #181825;
  border-left: 1px solid #313244;
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

#sidebar-right .panel-header {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

#all-tags-search {
  width: 100%;
  padding: 5px 8px;
  background: #11111b;
  color: #cdd6f4;
  border: 1px solid #45475a;
  border-radius: 6px;
  font-size: 12px;
  outline: none;
}

#all-tags-search:focus {
  border-color: #89b4fa;
}

#all-tags {
  display: flex;
  flex-direction: column;
  gap: 0;
}

#all-tags .all-tag-item {
  padding: 5px 12px;
  font-size: 12px;
  cursor: pointer;
  border-bottom: 1px solid #11111b;
}

#all-tags .all-tag-item:hover {
  background: #313244;
}

#all-tags .all-tag-item.active {
  color: #a6e3a1;
  font-weight: 600;
}

#all-tags .all-tag-item.disabled {
  color: #585b70;
  cursor: default;
  font-style: italic;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: #45475a;
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: #585b70;
}