.landing {
  padding: 1.5rem;
  max-width: 1400px;
  margin: 0 auto;
}

.tool-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 1.5rem;
  align-items: start;
}

/* Preview Section */
.preview-section {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.upload-zone {
  background: var(--color-surface);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  min-height: max(500px, 65vh);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  position: relative;
  overflow: hidden;
}

.upload-zone:hover,
.upload-zone.drag-over {
  border-color: var(--color-primary);
  background: var(--color-surface-alt);
}

.upload-zone.has-file {
  border-style: solid;
  cursor: default;
}

.upload-prompt {
  text-align: center;
  padding: 2rem;
}

.upload-title {
  font-size: 1.2rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.upload-subtitle {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.preview-container {
  position: absolute;
  inset: 0;
}

.preview-container canvas {
  width: 100% !important;
  height: 100% !important;
  display: block;
}

/* Tool Menu Bar (inside preview, top right of sidebar) */
.tool-menubar {
  position: absolute;
  top: 0.5rem;
  left: 110px; /* Right of the sidebar width + gap */
  right: 0.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.35rem 0.5rem;
  background: var(--color-surface);
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  font-size: 0.75rem;
  z-index: 10;
}

.tool-menubar-left {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.tool-menubar-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.tool-option-group {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.tool-option-group[hidden] {
  display: none;
}

.tool-option-label {
  color: var(--color-text-muted);
  font-size: 0.7rem;
}

.tool-checkbox {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  color: var(--color-text-muted);
  font-size: 0.7rem;
  cursor: pointer;
}

.tool-checkbox input[type="checkbox"] {
  accent-color: var(--color-primary);
  cursor: pointer;
}

.tool-checkbox span {
  user-select: none;
}

.tool-slider {
  width: 80px;
  accent-color: var(--color-primary);
}

.tool-option-value {
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.7rem;
  min-width: 1.25rem;
}

.fill-axis-buttons {
  display: flex;
  gap: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.fill-axis-btn {
  padding: 0.2rem 0.5rem;
  font-size: 0.7rem;
  font-weight: 500;
  background: var(--color-surface-alt);
  border: none;
  border-right: 1px solid var(--color-border);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all 0.1s;
}

.fill-axis-btn:last-child {
  border-right: none;
}

.fill-axis-btn:hover {
  background: var(--color-border);
  color: var(--color-text);
}

.fill-axis-btn.active {
  background: var(--color-primary);
  color: white;
}

.paint-selected {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.paint-swatch {
  display: inline-block;
  width: 16px;
  height: 16px;
  border-radius: 3px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  background-size: cover;
}

.paint-block-name {
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.75rem;
}

.paint-hint {
  margin-left: 0.15rem;
}

.paint-hint kbd {
  background: var(--color-code-bg);
  padding: 0.1rem 0.25rem;
  border-radius: 3px;
  font-family: inherit;
  font-size: 0.6rem;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

/* Control Hints Bar (below preview) */
.control-hints {
  padding: 0.4rem 0.75rem;
  background: var(--color-surface);
  border-radius: var(--radius);
  font-size: 0.7rem;
  color: var(--color-text-muted);
  text-align: center;
}

.btn-icon {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.3rem 0.5rem;
  background: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
  cursor: pointer;
  font-size: 0.75rem;
  transition: all 0.15s;
}

.btn-icon:hover:not(:disabled) {
  background: var(--color-surface-alt);
}

.btn-icon:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.undo-icon {
  font-size: 0.9rem;
}

.undo-label {
  font-weight: 500;
}

/* Tool Sidebar (top-left of preview) */
.tool-sidebar {
  position: absolute;
  left: 0.5rem;
  top: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0;
  background: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  z-index: 10;
  border: 1px solid var(--color-border);
}

.tool-btn {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 0.35rem;
  padding: 0.35rem 0.5rem;
  background: var(--color-surface);
  border: none;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all 0.1s;
  font-size: 0.7rem;
}

.tool-btn:last-child {
  border-bottom: none;
}

.tool-btn:hover {
  background: var(--color-surface-alt);
  color: var(--color-text);
}

.tool-btn.active {
  background: var(--color-primary);
  color: white;
}

.tool-icon {
  font-size: 0.7rem;
  line-height: 1;
  width: 14px;
  text-align: center;
  opacity: 0.8;
}

.tool-btn.active .tool-icon {
  opacity: 1;
}

.tool-label {
  font-size: 0.7rem;
  font-weight: 500;
}

.tool-btn kbd {
  margin-left: auto;
  background: rgba(0, 0, 0, 0.15);
  padding: 0.1rem 0.25rem;
  border-radius: 2px;
  font-family: inherit;
  font-size: 0.6rem;
  border: none;
  opacity: 0.7;
}

.tool-btn.active kbd {
  background: rgba(255, 255, 255, 0.2);
}

/* Model Settings Bar */
.model-settings {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
  padding: 0.5rem 0.75rem;
  background: var(--color-surface);
  border-radius: var(--radius);
  font-size: 0.75rem;
  flex-wrap: wrap;
}

.model-settings .file-name {
  color: var(--color-text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 150px;
  font-size: 0.75rem;
}

.model-divider {
  width: 1px;
  height: 18px;
  background: var(--color-border);
}

.model-setting {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.model-setting-label {
  color: var(--color-text-muted);
  font-size: 0.7rem;
  font-weight: 500;
}

.model-slider {
  width: 70px;
  accent-color: var(--color-primary);
}

.model-input {
  width: 48px;
  padding: 0.2rem 0.25rem;
  font-size: 0.75rem;
  text-align: center;
  background: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
}

.model-select {
  padding: 0.2rem 0.3rem;
  font-size: 0.7rem;
  background: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-text);
}

.tool-option-divider {
  width: 1px;
  height: 16px;
  background: var(--color-border);
  margin: 0 0.25rem;
}

/* Controls Section */
.controls-section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.controls-panel {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.control-group label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.scale-input-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.scale-input-row input[type="range"] {
  flex: 1;
  accent-color: var(--color-primary);
}

.scale-input-row input[type="number"] {
  width: 60px;
  text-align: center;
}

.controls-panel select {
  width: 100%;
}

.offset-inputs {
  display: flex;
  gap: 0.5rem;
}

.offset-field {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.offset-field span {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

.offset-field input {
  width: 100%;
}

/* Progress */
.progress-bar {
  background: var(--color-surface);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  position: relative;
  overflow: hidden;
}

.progress-fill {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  background: var(--color-primary);
  opacity: 0.15;
  width: 0%;
  transition: width 0.2s;
}

.progress-text {
  position: relative;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* Output */
.output-panel {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.output-stats {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.output-textarea {
  width: 100%;
  height: 200px;
  resize: vertical;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.75rem;
  line-height: 1.5;
  background: var(--color-code-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.75rem;
  color: var(--color-text);
}

.output-actions {
  display: flex;
  gap: 0.5rem;
}

.output-actions button {
  flex: 1;
  min-width: 0;
  padding: 0.5rem 0.75rem;
  font-size: 0.85rem;
  width: auto;
}

.output-help-link {
  text-align: center;
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color 0.15s;
}

.output-help-link:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

/* Warning */
.file-warning {
  background: rgba(217, 119, 6, 0.1);
  border: 1px solid var(--color-warning);
  border-radius: var(--radius);
  padding: 0.6rem 0.85rem;
  font-size: 0.85rem;
  color: var(--color-warning);
}

/* Project Panel */
.project-panel {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 1rem;
}

.project-actions {
  display: flex;
  gap: 0.5rem;
}

.project-actions button {
  flex: 1;
  font-size: 0.8rem;
  padding: 0.5rem 0.75rem;
}

/* Featured Examples */
.featured-examples {
  margin-top: 1rem;
}

.featured-examples[hidden] {
  display: none;
}

.featured-title {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.featured-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.featured-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s;
  border: 1px solid var(--color-border);
}

.featured-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  border-color: var(--color-primary);
}

.featured-thumb {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  background: var(--color-code-bg);
}

.featured-name {
  padding: 0.5rem;
  font-size: 0.75rem;
  font-weight: 500;
  text-align: center;
  color: var(--color-text);
}

@media (max-width: 900px) {
  .tool-layout {
    grid-template-columns: 1fr;
  }

  .upload-zone {
    min-height: 350px;
  }
}