/* ==========================================================================
   Image Resizer - 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
   ========================================================================== */

/* === RESIZE METHOD SELECTOR === */
.resize-method-selector {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.radio-label {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 14px;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: var(--radius-md);
    transition: background-color 0.2s;
}

.radio-label:hover {
    background: var(--bg-tertiary);
}

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

.radio-label input[type="radio"]:checked + span {
    color: var(--text-primary);
    font-weight: 500;
}

/* === DIMENSION INPUTS === */
.dimension-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

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

/* === PRESET BUTTONS === */
.preset-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-sm);
}

.preset-btn {
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s;
}

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

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

/* === QUALITY GROUP (hide for PNG) === */
#qualityGroup {
    transition: opacity 0.3s;
}

#qualityGroup.hidden {
    opacity: 0.5;
    pointer-events: none;
}

/* === 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;
}

/* Image comparison layout */
.image-comparison {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-lg);
    width: 100%;
    align-items: start;
}

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

.comparison-item h4 {
    margin: 0 0 var(--space-sm) 0;
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.comparison-item img {
    max-width: 100%;
    max-height: 250px;
    border-radius: var(--radius-md);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.image-info {
    margin-top: var(--space-sm);
    font-size: 12px;
    color: var(--text-tertiary);
    line-height: 1.4;
}

/* === PRO FEATURES SECTION === */
.pro-features-section {
    margin-top: var(--space-xl);
}

.pro-features {
    display: flex;
    gap: var(--space-md);
}

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

/* Pro feature styling for non-Pro users */
.pro-feature {
    opacity: 0.7;
    cursor: pointer;
}

.pro-feature:hover {
    opacity: 1;
}

/* Pro unlocked state */
.pro-feature.pro-unlocked {
    opacity: 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 .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;
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
    .dimension-inputs {
        grid-template-columns: 1fr;
    }
    
    .preset-buttons {
        grid-template-columns: 1fr;
    }
    
    .image-comparison {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .pro-features {
        flex-direction: column;
    }
    
    .preview-container {
        min-height: 250px;
        padding: var(--space-md);
    }
}