/* ==========================================================================
   Watermark Studio - 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
   ========================================================================== */

/* === PREVIEW AREA === */
.preview-container {
    min-height: 400px;
    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;
    position: relative;
}

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

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

/* Result display */
.preview-result {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

#previewCanvas {
    max-width: 100%;
    max-height: 350px;
    border-radius: var(--radius-md);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* === WATERMARK TYPE SELECTION === */
.radio-label {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm) 0;
    cursor: pointer;
    color: var(--text-secondary);
    transition: color 0.2s ease;
}

.radio-label:hover {
    color: var(--text-primary);
}

.radio-label input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.radio-custom {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-default);
    border-radius: 50%;
    position: relative;
    transition: all 0.2s ease;
}

.radio-label input[type="radio"]:checked + .radio-custom {
    border-color: var(--color-primary);
    background: var(--color-primary);
}

.radio-label input[type="radio"]:checked + .radio-custom::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: white;
}

/* === POSITION GRID === */
.position-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xs);
    margin-top: var(--space-xs);
}

.position-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    padding: var(--space-sm);
    font-size: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

.position-btn:hover {
    background: var(--bg-hover);
    border-color: var(--border-hover);
    color: var(--text-primary);
}

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

/* === FILE UPLOAD ZONES === */
.file-upload-zone.small {
    min-height: 120px;
}

.file-upload-zone.small .upload-icon {
    font-size: 24px;
}

.file-upload-zone.small .upload-primary {
    font-size: 14px;
}

.file-upload-zone.small .upload-secondary {
    font-size: 12px;
}

/* === PRO FEATURES ROW === */
.pro-features {
    padding: var(--space-lg);
    margin-top: var(--space-xl);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-default);
}

.pro-features h4 {
    color: var(--text-primary);
    font-size: 18px;
    font-weight: 600;
    margin: 0 0 var(--space-md) 0;
}

.pro-feature-buttons {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.pro-feature-buttons .button-secondary {
    flex: 1;
    min-width: 140px;
}

/* === RANGE INPUTS === */
input[type="range"] {
    width: 100%;
    margin: var(--space-xs) 0;
}

/* === BATCH QUEUE (Pro Feature) === */
.batch-queue {
    display: none;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    margin-top: var(--space-md);
}

.batch-queue.visible {
    display: block;
}

.batch-queue-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm);
    margin-bottom: var(--space-xs);
    background: var(--bg-primary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-sm);
}

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

.batch-item-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

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

.batch-item-size {
    font-size: 12px;
    color: var(--text-tertiary);
}

.batch-item-remove {
    background: none;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    padding: var(--space-xs);
    font-size: 14px;
}

.batch-item-remove:hover {
    color: var(--color-error);
}

/* === WATERMARK PRESETS === */
.preset-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: var(--space-sm);
    margin-top: var(--space-sm);
}

.preset-btn {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

.preset-btn:hover {
    background: var(--bg-hover);
    border-color: var(--border-hover);
}

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

.preset-preview {
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: var(--space-xs);
    padding: var(--space-xs);
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-default);
}

.preset-name {
    font-size: 13px;
    font-weight: 500;
}

/* === 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 .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;
}

/* === PROCESSING STATES === */
.input-section.processing {
    opacity: 0.7;
    pointer-events: none;
}

.watermark-preview {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    padding: var(--space-xs) var(--space-sm);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    border-radius: var(--radius-sm);
    font-size: 12px;
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
    .position-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-xs);
    }
    
    .position-btn {
        font-size: 11px;
        padding: var(--space-xs);
    }
    
    .pro-feature-buttons {
        flex-direction: column;
    }
    
    .preview-container {
        min-height: 250px;
    }
    
    #previewCanvas {
        max-height: 200px;
    }
}