/* ===================================
   WORKSPACE - Main Content Area & Modal
   =================================== */

/* ===== MAIN CONTENT ===== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--color-bg-primary);
    overflow: hidden;
}

/* ===== TOOLBAR ===== */
.toolbar {
    height: var(--toolbar-height);
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--border-color-primary);
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-xl);
    gap: var(--spacing-md);
}

.toolbar-title {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wide);
}

/* ===== WORKSPACE ===== */
.workspace {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: var(--spacing-xl);
    gap: var(--spacing-lg);
    overflow-y: auto;
}

/* ===== PREVIEW GRID ===== */
.preview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

.preview-card {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color-primary);
    transition: border-color var(--transition-base);
}

.preview-card:hover {
    border-color: var(--border-color-secondary);
}

.preview-header {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-color-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.preview-label {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wide);
}

.preview-area {
    aspect-ratio: 4/3;
    background: var(--color-bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.preview-area img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    cursor: pointer;
    transition: transform var(--transition-base);
}

.preview-area img:hover {
    transform: scale(1.02);
}

/* ===== UPLOAD PLACEHOLDER ===== */
.upload-placeholder {
    text-align: center;
    color: var(--color-text-tertiary);
    padding: var(--spacing-2xl) var(--spacing-lg);
}

.upload-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--spacing-sm);
    opacity: 0.3;
    color: var(--color-text-tertiary);
}

.upload-text {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    margin-bottom: 4px;
    letter-spacing: var(--letter-spacing-normal);
}

.upload-hint {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    letter-spacing: var(--letter-spacing-normal);
}

/* ===== IMAGE COMPARISON FULLSCREEN MODAL ===== */
.comparison-fullscreen-modal {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(8px);
    z-index: var(--z-modal);
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    padding: var(--spacing-2xl);
    opacity: 0;
    transition: opacity var(--transition-slow);
}

.comparison-fullscreen-modal.active {
    display: flex;
    animation: modalFadeIn var(--transition-slow) ease-out forwards;
}

.comparison-fullscreen-modal.closing {
    animation: modalFadeOut 250ms ease-in forwards;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes modalFadeOut {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}

.comparison-fullscreen-container {
    position: relative;
    width: 90vw;
    max-width: 1400px;
    height: 80vh;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    cursor: ew-resize;
    user-select: none;
    transform: scale(0.95);
    animation: imageZoomIn var(--transition-slow) ease-out forwards;
}

.comparison-fullscreen-modal.closing .comparison-fullscreen-container {
    animation: imageZoomOut 250ms ease-in forwards;
}

@keyframes imageZoomIn {
    from {
        transform: scale(0.95);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes imageZoomOut {
    from {
        transform: scale(1);
        opacity: 1;
    }
    to {
        transform: scale(0.95);
        opacity: 0;
    }
}

.comparison-img-before,
.comparison-img-after {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    pointer-events: none;
}

.comparison-img-after {
    clip-path: inset(0 50% 0 0);
    transition: clip-path 0.05s ease-out;
}

.comparison-labels {
    position: absolute;
    top: var(--spacing-lg);
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    z-index: 2;
    pointer-events: none;
}

.comparison-label-before,
.comparison-label-after {
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(20, 20, 22, 0.9);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
    text-transform: uppercase;
    letter-spacing: var(--letter-spacing-wide);
    border: 1px solid var(--border-color-primary);
}

.comparison-slider {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 4px;
    transform: translateX(-50%);
    z-index: 3;
    transition: left 0.05s ease-out;
}

.comparison-slider-line {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 2px;
    background: var(--color-brand-primary);
    transform: translateX(-50%);
    box-shadow: 0 0 20px rgba(79, 70, 229, 0.8), 0 0 40px rgba(79, 70, 229, 0.4);
}

.comparison-slider-handle {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    cursor: ew-resize;
}

.comparison-slider-circle {
    width: 56px;
    height: 56px;
    background: rgba(79, 70, 229, 0.2);
    backdrop-filter: blur(8px);
    border: 3px solid var(--color-brand-primary);
    border-radius: 50%;
    box-shadow: var(--shadow-brand), 0 0 30px rgba(79, 70, 229, 0.5);
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
}

.comparison-slider-circle::before,
.comparison-slider-circle::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 2px;
    background: var(--color-brand-primary);
}

.comparison-slider-circle::before {
    left: 14px;
}

.comparison-slider-circle::after {
    right: 14px;
}

.comparison-slider-handle:hover .comparison-slider-circle,
.comparison-fullscreen-container.dragging .comparison-slider-circle {
    width: 64px;
    height: 64px;
    background: rgba(79, 70, 229, 0.3);
    box-shadow: var(--shadow-brand), 0 0 40px rgba(79, 70, 229, 0.7);
}

.close-fullscreen-btn {
    position: absolute;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 44px;
    height: 44px;
    background: rgba(20, 20, 22, 0.9);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-color-primary);
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    color: var(--color-text-primary);
    transition: all var(--transition-base);
    z-index: 10;
}

.close-fullscreen-btn:hover {
    background: rgba(30, 30, 35, 0.95);
    border-color: var(--border-color-secondary);
    transform: scale(1.1);
}

.fullscreen-hint {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: rgba(20, 20, 22, 0.9);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color-primary);
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    text-align: center;
    letter-spacing: var(--letter-spacing-normal);
    animation: hintFadeIn 1s ease-out 0.5s forwards;
    opacity: 0;
}

@keyframes hintFadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}