/* 固有スタイル */
.upload-area {
  background: var(--color-solid-card);
  border: 3px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: 4rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-base);
  backdrop-filter: blur(10px);
}

.upload-area:hover, .upload-area.drag-over {
  border-color: #1a1a1a;
  background-color: rgba(78, 205, 196, 0.05);
  box-shadow: none;
}

.upload-icon {
  width: 64px;
  height: 64px;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-md);
  transition: color var(--transition-base);
}

.upload-area:hover .upload-icon {
  color: #1a1a1a;
}

.upload-text {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-sm);
}

.upload-subtext {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

/* Editor Area */
.editor-area {
  background: var(--color-solid-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
  margin-top: var(--spacing-2xl);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  backdrop-filter: blur(10px);
}

@media (max-width: 768px) {
  .editor-area {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
}

.preview-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-tertiary);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  min-height: 200px;
  border: 1px solid var(--color-border);
}

#image-preview {
  max-width: 100%;
  max-height: 300px;
  border-radius: var(--radius-md);
  object-fit: contain;
  box-shadow: var(--shadow-sm);
}

.file-info {
  margin-top: var(--spacing-md);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
}

.controls-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.control-group label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-primary);
  font-family: var(--font-display);
}

/* Radio Buttons */
.format-options {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

/* Slider */
input[type="range"] {
  width: 100%;
  cursor: pointer;
  accent-color: #1a1a1a;
}

/* .btn-primary / .btn-secondary → studio.css に統一 */
.action-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin-top: auto;
}

.hidden {
  display: none !important;
}