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

/* Retro Neon Light Mode with Gray */
:root {
  --app-bg: #f0f0f0;
  --app-text: #1a1a1a;
  --app-text-muted: #666666;
  --app-border: rgba(150, 150, 150, 0.4);
  --app-border-bright: rgba(110, 203, 255, 0.7);
  --section-bg: rgba(230, 230, 230, 0.8);
  --section-header-bg: linear-gradient(180deg, rgba(220, 220, 220, 0.8) 0%, rgba(210, 210, 210, 0.6));
  --section-border: rgba(180, 180, 180, 0.5);
  --card-bg: rgba(240, 240, 240, 0.9);
  --card-hover-bg: rgba(220, 220, 220, 0.8);
  --card-border: rgba(110, 203, 255, 0.4);
  --card-active-border: #71dfff;
  --card-active-glow: rgba(113, 223, 255, 0.3);
  --status-bg: rgba(220, 220, 220, 0.7);
  --info-bg: rgba(230, 230, 230, 0.6);
  --button-bg: linear-gradient(180deg, rgba(62, 139, 255, 0.25), rgba(36, 100, 216, 0.15));
  --button-hover-bg: linear-gradient(180deg, rgba(62, 139, 255, 0.35), rgba(36, 100, 216, 0.25));
  --button-border: rgba(110, 203, 255, 0.5);
  --secret-border: rgba(113, 223, 255, 0.4);
  --secret-bg: rgba(240, 240, 240, 0.7);
}

body {
  margin: 0;
  font-family: "Tahoma", "Segoe UI", "Trebuchet MS", Arial, sans-serif;
  background: var(--app-bg);
  color: var(--app-text);
  line-height: 1.5;
}

.control-panel {
  height: 100vh;
  overflow-y: auto;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.5) 0%, transparent 30%), var(--app-bg);
}

/* Header */
.panel-header {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 1rem 1.2rem;
  background: var(--section-header-bg);
  border-bottom: 1px solid var(--app-border);
}

.header-icon {
  font-size: 2rem;
  filter: drop-shadow(0 0 3px rgba(110, 203, 255, 0.3));
}

.header-text h1 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--app-text);
  margin-bottom: 0.1rem;
}

.header-subtitle {
  font-size: 0.75rem;
  color: var(--app-text-muted);
  margin: 0;
}

/* Content */
.panel-content {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* Control Sections */
.control-section {
  border: 1px solid var(--section-border);
  border-radius: 6px;
  background: var(--section-bg);
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.section-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.7rem 0.9rem;
  background: var(--section-header-bg);
  border-bottom: 1px solid var(--section-border);
}

.section-icon {
  font-size: 1.2rem;
  filter: drop-shadow(0 0 2px rgba(110, 203, 255, 0.2));
}

.section-header h2 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--app-text);
  margin: 0;
}

.section-body {
  padding: 1rem;
}

.section-description {
  font-size: 0.8rem;
  color: var(--app-text-muted);
  margin: 0 0 0.8rem;
}

/* Theme Selector */
.theme-selector {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.8rem;
  margin-bottom: 0.8rem;
}

.theme-card {
  border: 2px solid var(--card-border);
  border-radius: 6px;
  padding: 0.7rem;
  background: var(--card-bg);
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  --preview-titlebar: var(--titlebar-mid, var(--titlebar-top));
  --preview-body: var(--window-body);
}

.theme-card--fallback {
  --preview-titlebar: linear-gradient(180deg, #6c7684, #4a5361 55%, #313947);
  --preview-body: linear-gradient(180deg, #2a303a, #1c222c);
}

.theme-card:hover {
  border-color: var(--app-border-bright);
  background: var(--card-hover-bg);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--card-active-glow);
}

.theme-card.active {
  border-color: var(--card-active-border);
  background: var(--card-hover-bg);
  box-shadow: 0 0 12px var(--card-active-glow);
}

.theme-preview {
  height: 60px;
  border: 1px solid rgba(0, 0, 0, 0.4);
  border-radius: 4px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  position: relative;
}

.theme-preview-fallback {
  position: absolute;
  inset: auto 6px 6px auto;
  padding: 0.15rem 0.35rem;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.7);
  color: #fff;
  font-size: 0.55rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.preview-titlebar {
  height: 16px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.3);
  background: var(--preview-titlebar);
}

.preview-body {
  flex: 1;
  background: var(--preview-body);
}

.theme-empty {
  font-size: 0.75rem;
  color: var(--app-text-muted);
  margin: 0 0 0.5rem;
}

.theme-info {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.theme-name {
  font-size: 0.8rem;
  color: var(--app-text);
  font-weight: 700;
}

.theme-desc {
  font-size: 0.7rem;
  color: var(--app-text-muted);
}

/* Wallpaper Picker */
.wallpaper-section {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  margin-top: 0.7rem;
}

.wallpaper-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.wallpaper-upload {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 0.9rem;
  border: 1px solid var(--button-border);
  border-radius: 6px;
  background: var(--button-bg);
  color: var(--app-text);
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
}

.wallpaper-upload:hover {
  background: var(--button-hover-bg);
  border-color: var(--app-border-bright);
  box-shadow: 0 4px 12px var(--card-active-glow);
}

.wallpaper-upload input {
  display: none;
}

.wallpaper-upload-label {
  letter-spacing: 0.01em;
}

.wallpaper-clear {
  padding: 0.55rem 0.9rem;
  border: 1px solid var(--card-border);
  border-radius: 6px;
  background: transparent;
  color: var(--app-text-muted);
  font-size: 0.78rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
}

.wallpaper-clear:hover {
  color: var(--app-text);
  border-color: var(--app-border-bright);
  box-shadow: 0 2px 10px var(--card-active-glow);
}

.wallpaper-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 0.6rem;
}

.wallpaper-card {
  position: relative;
  border: 2px solid var(--card-border);
  border-radius: 8px;
  aspect-ratio: 16 / 9;
  height: auto;
  background: var(--card-bg);
  overflow: hidden;
  cursor: pointer;
  transition: all 0.2s ease;
}

.wallpaper-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--wallpaper-thumb);
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  opacity: 0.95;
}

.wallpaper-card::after {
  content: attr(data-label);
  position: absolute;
  left: 6px;
  bottom: 6px;
  font-size: 0.6rem;
  color: #ffffff;
  background: rgba(0, 0, 0, 0.65);
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
}

.wallpaper-card:hover {
  border-color: var(--app-border-bright);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px var(--card-active-glow);
}

.wallpaper-card--active {
  border-color: var(--card-active-border);
  box-shadow: 0 0 12px var(--card-active-glow);
}

.wallpaper-empty {
  font-size: 0.75rem;
  color: var(--app-text-muted);
  margin: 0;
}

.wallpaper-fit {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.fit-toggle {
  display: inline-flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.fit-option {
  padding: 0.45rem 0.85rem;
  border: 1px solid var(--card-border);
  border-radius: 999px;
  background: transparent;
  color: var(--app-text-muted);
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
}

.fit-option:hover {
  color: var(--app-text);
  border-color: var(--app-border-bright);
  box-shadow: 0 2px 10px var(--card-active-glow);
}

.fit-option.is-active {
  color: var(--app-text);
  border-color: var(--card-active-border);
  background: var(--card-bg);
  box-shadow: 0 0 10px var(--card-active-glow);
}

/* Status Bar */
.status-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 0.8rem;
  background: var(--status-bg);
  border: 1px solid var(--section-border);
  border-radius: 4px;
  font-size: 0.8rem;
}

.status-label {
  color: var(--app-text-muted);
  font-weight: 700;
}

.status-value {
  font-weight: 600;
}

.language-section {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin-top: 0.8rem;
}

.language-label {
  font-size: 0.78rem;
  color: var(--app-text-muted);
  font-weight: 700;
}

.language-select {
  padding: 0.5rem 0.65rem;
  border: 1px solid var(--button-border);
  border-radius: 6px;
  background: var(--card-bg);
  color: var(--app-text);
  font-size: 0.8rem;
  font-family: inherit;
}

.language-select:focus {
  outline: none;
  border-color: var(--app-border-bright);
  box-shadow: 0 0 0 2px var(--card-active-glow);
}

/* Info Grid */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0.6rem;
}

.info-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  padding: 0.6rem;
  background: var(--info-bg);
  border: 1px solid var(--card-border);
  border-radius: 4px;
}

.info-label {
  font-size: 0.7rem;
  color: var(--app-text-muted);
  font-weight: 600;
}

.info-value {
  font-size: 0.8rem;
  color: var(--app-text);
  font-weight: 700;
}

/* Action Button */
.action-button {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.7rem 1rem;
  border: 1px solid var(--button-border);
  border-radius: 6px;
  background: var(--button-bg);
  color: var(--app-text);
  font-size: 0.85rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
  width: 100%;
  justify-content: center;
}

.action-button:hover {
  background: var(--button-hover-bg);
  border-color: var(--app-border-bright);
  box-shadow: 0 4px 12px var(--card-active-glow);
}

.button-icon {
  font-size: 1.1rem;
}

.button-label {
  letter-spacing: 0.01em;
}

/* Secret Panel */
.secret-panel {
  margin-top: 0.8rem;
  padding: 0;
  border: 2px solid var(--secret-border);
  border-radius: 6px;
  background: var(--secret-bg);
  overflow: hidden;
  animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.secret-content {
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.secret-title {
  font-size: 0.9rem;
  font-weight: 700;
  margin: 0;
}

.secret-text {
  font-size: 0.8rem;
  color: var(--app-text-muted);
  line-height: 1.5;
  margin: 0;
}

.secret-gif {
  width: 100%;
  max-width: 200px;
  border: 2px solid var(--card-border);
  border-radius: 4px;
  margin-top: 0.4rem;
  align-self: center;
}

.hidden {
  display: none;
}

/* Scrollbar */
.control-panel::-webkit-scrollbar {
  width: 8px;
}

.control-panel::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.3);
}

.control-panel::-webkit-scrollbar-thumb {
  background: var(--card-border);
  border-radius: 4px;
}

.control-panel::-webkit-scrollbar-thumb:hover {
  background: var(--app-border-bright);
}