/* Upload zone */
.upload-zone {
  background: var(--color-card);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  margin-bottom: 2rem;
}

.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--color-primary);
  background: rgba(231, 76, 60, 0.04);
}

.upload-zone.has-file {
  border-style: solid;
  border-color: #27ae60;
  background: rgba(39, 174, 96, 0.05);
}

.upload-zone-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.6;
}

.upload-zone-text {
  font-size: 1.1rem;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

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

.upload-zone input[type="file"] {
  display: none;
}

/* Options panel */
.options-panel {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  padding: 1.5rem 2rem;
  margin-bottom: 2rem;
  box-shadow: var(--shadow);
}

.options-title {
  font-size: 1rem;
  font-weight: 600;
  margin: 0 0 1rem;
  color: var(--color-text);
}

.options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
}

.option-group label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--color-text-muted);
}

.option-group select {
  width: 100%;
  padding: 0.6rem 0.75rem;
  font-size: 0.95rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: white;
  font-family: inherit;
  cursor: pointer;
}

.option-group select:focus {
  outline: none;
  border-color: var(--color-primary);
}

/* Quality slider */
.quality-slider {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.quality-slider input[type="range"] {
  flex: 1;
  height: 6px;
  -webkit-appearance: none;
  background: var(--color-border);
  border-radius: 3px;
}

.quality-slider input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  background: var(--color-primary);
  border-radius: 50%;
  cursor: pointer;
}

.quality-slider input[type="range"]::-moz-range-thumb {
  width: 18px;
  height: 18px;
  background: var(--color-primary);
  border-radius: 50%;
  cursor: pointer;
  border: none;
}

.quality-value {
  min-width: 3rem;
  font-weight: 600;
  font-size: 0.9rem;
}

/* Compress button */
.compress-btn-wrap {
  margin: 2rem 0;
  text-align: center;
}

/* Options panel disabled state */
.options-panel.disabled {
  opacity: 0.6;
  pointer-events: none;
}

.options-panel.disabled .option-group select,
.options-panel.disabled .option-group input {
  cursor: not-allowed;
}

/* Progress */
.progress-wrap {
  margin: 2rem 0;
  display: none;
}

.progress-wrap.processing {
  display: block;
}

.progress-content {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.spinner {
  width: 24px;
  height: 24px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.progress-info {
  flex: 1;
  min-width: 0;
}

.progress-bar {
  height: 8px;
  background: var(--color-border);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.progress-fill {
  height: 100%;
  background: var(--color-primary);
  width: 0%;
  transition: width 0.2s ease-out;
}

.progress-fill.indeterminate {
  width: 100% !important;
  animation: indeterminate 1.5s ease-in-out infinite;
  background: linear-gradient(
    90deg,
    var(--color-primary) 0%,
    #f39c12 50%,
    var(--color-primary) 100%
  );
  background-size: 200% 100%;
}

@keyframes indeterminate {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

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

/* Comparison component */
.comparison {
  display: none;
  margin-top: 2rem;
}

.comparison.visible {
  display: block;
}

.comparison-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.comparison-summary {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
}

.comparison-summary .savings {
  color: #27ae60;
}

.comparison-summary .savings.negative {
  color: var(--color-primary);
}

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

@media (max-width: 768px) {
  .comparison-grid {
    grid-template-columns: 1fr;
  }
}

.comparison-card {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.comparison-card-header {
  padding: 1rem 1.25rem;
  background: var(--color-bg);
  font-weight: 600;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.comparison-card-header.original {
  border-left: 4px solid #3498db;
}

.comparison-card-header.optimized {
  border-left: 4px solid #27ae60;
}

.comparison-card-body {
  padding: 1rem;
}

.comparison-image-wrap {
  position: relative;
  aspect-ratio: 16/10;
  background: #f0f0f0;
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 1rem;
}

.comparison-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  transition: opacity 0.3s;
}

.comparison-image-wrap img.loading {
  opacity: 0.5;
}

.comparison-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.comparison-meta span {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.comparison-download {
  margin-top: 1rem;
}

.comparison-download .btn {
  width: 100%;
}

/* Error state */
.error-message {
  background: #ffebee;
  color: #c62828;
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  margin: 1rem 0;
  display: none;
}

.error-message.visible {
  display: block;
}

/* Multiple result: list + ZIP options */
.result-multiple {
  display: none;
  margin-top: 2rem;
}

.result-multiple.visible {
  display: block;
}

.result-multiple-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 1rem;
  color: var(--color-text);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-border);
}

.result-multiple-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
}

.result-multiple-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1rem;
  background: var(--color-card);
  border-radius: var(--radius);
  font-size: 0.95rem;
  box-shadow: var(--shadow);
}

.result-multiple-item.error {
  background: #ffebee;
  color: #c62828;
}

.result-multiple-name {
  font-weight: 500;
  color: var(--color-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin-right: 1rem;
}

.result-multiple-sizes {
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.zip-options {
  background: var(--color-card);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  box-shadow: var(--shadow);
}

.zip-option-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.zip-option-row:last-of-type {
  margin-bottom: 0.75rem;
}

.zip-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  min-width: 7rem;
}

.zip-toggle input[type="checkbox"] {
  width: 1.1rem;
  height: 1.1rem;
  cursor: pointer;
}

.zip-input {
  flex: 1;
  padding: 0.5rem 0.75rem;
  font-size: 0.95rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-family: inherit;
}

.zip-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.zip-input:disabled {
  background: var(--color-bg);
  color: var(--color-text-muted);
  cursor: not-allowed;
}

.zip-preview {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
  padding: 0.5rem 0;
}

#downloadAllZipBtn {
  width: 100%;
}