/* --- Top Bar --- */
#top-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--top-bar-height);
  background: var(--bg-offset);
  border-bottom: 1px solid var(--border-color);
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 2000;
}

#top-bar .top-bar-left,
#top-bar .top-bar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}
#top-bar .top-bar-center {
  flex-grow: 1;
  text-align: center;
}

#top-bar .brand {
  display: block; /* Show brand text */
  font-weight: 600;
  font-size: 16px;
}

#top-bar .hint {
  color: var(--fg-muted);
  font-size: 12px;
  background: var(--bg-inset);
  padding: 4px 12px;
  border-radius: 6px;
}

#top-bar button {
  border: 1px solid var(--border-color-strong);
  background: var(--button-bg);
  color: var(--button-fg);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  transition: background-color 0.1s ease;
}

#top-bar button:hover {
  background: var(--button-hover-bg);
}

#top-bar button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  background: var(--button-bg) !important;
}

#top-bar button.danger {
  background-color: var(--danger-bg-subtle);
  border-color: var(--danger-border-subtle);
  color: var(--danger-fg-subtle);
}

#top-bar button.danger:hover {
  background-color: #ffe3e3; /* TODO: themable */
}

#top-bar .divider {
  width: 1px;
  height: 24px;
  background-color: var(--border-color);
  margin: 0 4px;
}

.generator-controls-group,
.main-controls-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.generator-controls-group {
  gap: 0;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--bg-inset);
  align-items: stretch;
}

.theme-grid-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

#theme-select {
  background: var(--button-bg);
  color: var(--button-fg);
  border: 1px solid var(--border-color-strong);
  border-radius: 6px;
  padding: 5px 8px;
  font-size: 13px;
  cursor: pointer;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 6px center;
  padding-right: 24px;
}

#theme-select:hover {
  background: var(--button-hover-bg);
}

.icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    background: none !important;
    border: none !important;
    padding: 4px !important;
    color: var(--fg-muted);
}
.icon-btn:hover { color: var(--fg); }

/* --- More Controls Dropdown --- */
.more-controls-group {
  position: relative;
  display: none; /* Hidden by default, shown on mobile */
}

.more-controls-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 8px;
  background: var(--bg-offset);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 2001;
  min-width: 200px;
}
.more-controls-dropdown .theme-grid-controls {
  flex-direction: column;
  align-items: stretch;
  gap: 8px;
}
.more-controls-dropdown .theme-grid-controls select,
.more-controls-dropdown button {
  width: 100%;
}
.more-controls-dropdown .divider {
  height: 1px;
  width: auto;
  margin: 4px -8px;
  background: var(--border-color);
}

/* --- Left Panel --- */
#left-panel {
  position: fixed;
  top: var(--top-bar-height);
  left: 0;
  bottom: 0;
  width: var(--left-panel-width);
  background: var(--bg-offset);
  border-right: 1px solid var(--border-color);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s ease-in-out;
  transform: translateX(0);
}

body.panel-collapsed #left-panel {
  transform: translateX(-100%);
}

.panel-section {
  padding: 16px;
  border-bottom: 1px solid var(--border-color);
}
.panel-section:last-child {
  border-bottom: none;
}
.panel-section-divider {
  height: 8px;
  background: var(--bg);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

#panel-tools {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.tool-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}
.tool-group label {
  grid-column: 1 / -1;
  font-size: 11px;
  font-weight: 600;
  color: var(--fg-muted);
  text-transform: uppercase;
  margin-bottom: -4px;
  letter-spacing: 0.5px;
}
.tool-group button {
  width: 100%;
}
.tool-group .elevation-controls,
.tool-group#grid-controls {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 4px;
}
.elevation-controls button {
  flex: 0 0 32px;
  font-weight: bold;
}
.elevation-controls .elevation-display {
  flex-grow: 1;
  text-align: center;
  font-weight: 500;
  padding: 4px;
  background: var(--bg-inset);
  border-radius: 4px;
}
#grid-controls button {
    flex-grow: 1;
}

.grid-color-controls { display:flex; align-items:center; gap:8px; }
#grid-swatches { display:flex; gap:6px; flex-wrap:wrap; }
#grid-swatches .swatch { width:20px; height:20px; border:1px solid var(--border-color-strong); border-radius:4px; cursor:pointer; }
#grid-swatches .swatch[aria-checked="true"] { outline:2px solid var(--fg); outline-offset: 1px; }

#panel-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    overflow-y: hidden; /* Prevent this container from scrolling */
}
#palette-container {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    min-height: 0; /* Important for flex child with overflow */
}
.sticky-header {
    flex-shrink: 0; /* Prevent this from shrinking */
}
.scrollable-content {
    flex-grow: 1;
    overflow-y: auto;
}

#generator-panel-toggle-btn.section-toggle-btn {
  width: auto;
  padding-left: 28px;
  text-align: left;
}

.section-toggle-btn {
    width: 100%;
    text-align: left;
    background: var(--bg-inset);
    font-weight: 600;
    position: relative;
    padding-left: 32px;
}
.section-toggle-btn::before {
    content: '';
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%) rotate(-90deg);
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 5px solid currentColor;
    transition: transform 0.2s ease;
}
.section-toggle-btn.open::before {
    transform: translateY(-50%) rotate(0deg);
}

/* --- General Button Styles --- */
#left-panel button {
  border: 1px solid var(--button-border);
  background: var(--button-bg);
  color: var(--button-fg);
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  transition: background-color 0.1s ease;
  text-align: center;
}
#left-panel button:hover {
  background: var(--button-hover-bg);
}
#left-panel button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  background: var(--button-bg) !important;
}

#grid-toggle-btn.active {
  background: #343a40;
  color: white;
  border-color: #343a40;
}

/* --- Responsive --- */
@media (min-width: 769px) {
  #panel-toggle-btn {
    display: none;
  }
}

@media (max-width: 768px) {
  :root {
    --left-panel-width: 280px;
  }
  body {
    --left-panel-width: 280px;
  }
  body.panel-collapsed {
    --left-panel-width: 0px;
  }
  #left-panel {
     top: var(--top-bar-height); /* Keep below top bar */
     z-index: 3000;
     height: calc(100vh - var(--top-bar-height)); /* Only take remaining height */
  }
  #app-container {
    left: 0;
    width: 100%;
    top: var(--top-bar-height);
  }
  #panel-toggle-btn {
    display: flex;
  }
  
  .top-bar-center {
    display: none;
  }

  .main-controls-group {
    display: none;
  }
  
  .more-controls-group {
    display: block;
  }

  .brand {
    display: none;
  }
  
  .generator-quick-toggle {
    display: flex !important; /* Always show on mobile */
  }
  
  #generator-settings {
    display: flex !important; /* Always show on mobile */
  }
}

.generator-dropdown-wrapper {
  position: relative;
}

.generator-dropdown-toggle {
  height: 100%;
  border-left: 1px solid var(--border-color);
  border-radius: 0 7px 7px 0;
  padding: 0 6px !important;
  background-color: var(--button-bg) !important;
  transition: background-color 0.1s ease;
}
.generator-dropdown-toggle:hover {
  background-color: var(--button-hover-bg) !important;
}
.generator-dropdown-toggle svg {
  transition: transform 0.2s ease-in-out;
}
.generator-dropdown-toggle.open svg {
  transform: rotate(180deg);
}

.generator-dropdown-menu {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  background: var(--bg-offset);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  z-index: 2001;
  min-width: 140px;
}

.generator-dropdown-menu button {
  width: 100%;
  text-align: left;
  padding: 8px 12px;
  background: none;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  color: var(--button-fg);
}
.generator-dropdown-menu button:hover {
  background: var(--bg-inset);
}

.generator-quick-toggle {
  padding: 6px 12px !important;
  font-weight: 600 !important;
  border: none !important;
  border-radius: 7px 0 0 7px;
  transition: all 0.2s ease !important;
  min-width: 80px;
  background: transparent !important;
  color: var(--fg) !important;
}

.generator-quick-toggle.stopped {
    color: var(--primary-bg) !important;
}

.generator-quick-toggle.running {
    color: var(--danger-bg) !important;
    animation: pulse-text 2s infinite;
}

@keyframes pulse-text {
  0%, 100% { color: var(--danger-bg); }
  50% { color: var(--danger-fg-subtle); }
}

.generator-quick-toggle:hover {
  background: var(--bg-offset) !important;
}

#generator-settings {
  display: none !important;
}

#generator-panel-toggle-btn {
  display: none !important;
}