/* ==========================================================================
   SVG Optimizer - Tool-Specific Styles
   
   IMPORTANT: The design system already provides:
   - All colors via CSS variables
   - Nav, hero, buttons, inputs, file upload zones
   - Section spacing and layout
   
   DO NOT:
   - Add background colors to .input-section or .output-section
   - Add borders to sections
   - Add padding to sections (use input-group for internal spacing)
   - Override design system colors
   ========================================================================== */

/* === FILE SIZE COMPARISON === */
.file-size-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    padding: var(--space-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
}

.size-item {
    text-align: center;
}

.size-label {
    display: block;
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: var(--space-xs);
}

.size-value {
    display: block;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.size-item.savings .size-value {
    color: var(--color-success, #22c55e);
}

/* === PREVIEW AREA === */
.preview-container {
    min-height: 300px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Empty state */
.preview-empty {
    text-align: center;
    color: var(--text-tertiary);
}

.preview-empty p {
    font-size: 14px;
}

/* Result display */
.preview-result {
    width: 100%;
    text-align: center;
}

.preview-result .svg-preview {
    max-width: 100%;
    max-height: 400px;
    background: white;
    border-radius: var(--radius-md);
    padding: var(--space-md);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.preview-result .svg-code-preview {
    max-height: 200px;
    overflow-y: auto;
    text-align: left;
    background: var(--bg-secondary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    margin-top: var(--space-md);
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
    font-size: 12px;
    line-height: 1.4;
    color: var(--text-secondary);
}

/* === PRO FEATURES ROW === */
.pro-features {
    display: flex;
    gap: var(--space-md);
    margin-top: var(--space-lg);
}

.pro-features .button-secondary {
    flex: 1;
}

/* === ERROR STATES === */
.input-error {
    color: var(--color-error, #ef4444);
    font-size: 13px;
    margin-top: var(--space-xs);
}

.input-group.has-error .text-input,
.input-group.has-error .text-area,
.input-group.has-error .file-upload-zone {
    border-color: var(--color-error, #ef4444);
}

/* === LOADING STATES === */
.button-primary.is-loading .button-text {
    visibility: hidden;
}

.button-primary.is-loading .button-spinner {
    display: block;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

.button-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

.button-primary {
    position: relative;
}

/* === CHECKBOX STYLING ENHANCEMENTS === */
.input-group .checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-sm);
    font-size: 14px;
    color: var(--text-primary);
    cursor: pointer;
}

.input-group .checkbox-label:last-child {
    margin-bottom: 0;
}

.input-group .checkbox-label input[type="checkbox"] {
    margin: 0;
}

/* === BATCH UPLOAD ZONE (Pro Feature) === */
.batch-upload-zone {
    min-height: 150px;
    background: var(--bg-tertiary);
    border: 2px dashed var(--border-default);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s ease, background-color 0.2s ease;
    display: none; /* Hidden by default, shown when Pro */
}

.batch-upload-zone.drag-over {
    border-color: var(--color-primary);
    background: var(--bg-secondary);
}

.batch-upload-zone .upload-icon {
    font-size: 24px;
    margin-bottom: var(--space-sm);
    color: var(--text-secondary);
}

.batch-upload-zone .upload-primary {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--space-xs);
}

.batch-upload-zone .upload-secondary {
    font-size: 14px;
    color: var(--text-tertiary);
}

/* === BATCH PROCESSING QUEUE === */
.processing-queue {
    display: none;
    margin-top: var(--space-lg);
}

.queue-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-sm);
}

.queue-item:last-child {
    margin-bottom: 0;
}

.queue-item .file-name {
    font-size: 14px;
    color: var(--text-primary);
}

.queue-item .file-status {
    font-size: 12px;
    color: var(--text-secondary);
}

.queue-item.processing .file-status {
    color: var(--color-primary);
}

.queue-item.completed .file-status {
    color: var(--color-success, #22c55e);
}

.queue-item.error .file-status {
    color: var(--color-error, #ef4444);
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
    .file-size-comparison {
        grid-template-columns: 1fr;
        gap: var(--space-sm);
    }
    
    .pro-features {
        flex-direction: column;
    }
    
    .preview-container {
        min-height: 200px;
    }
    
    .preview-result .svg-code-preview {
        font-size: 11px;
        max-height: 150px;
    }
}