/* ==========================================================================
   Upscaler Page Styles
   ========================================================================== */

.upscaler-page {
    max-width: 1400px;
    padding: 0 var(--spacing-md);
}

/* Page Header */
.page-header__text {
    flex: 1;
    min-width: 0;
}

/* ==========================================================================
   Upscaler Form Layout
   ========================================================================== */

.upscaler-form {
    display: grid;
    grid-template-columns: 380px 1fr;
    gap: var(--spacing-xl);
}

.upscaler-form__left {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.upscaler-form__left .upload-zone {
    min-height: 180px;
}

.upscaler-form__left .btn-primary {
    width: 100%;
}

/* Resolution Options */
.resolution-options {
    display: flex;
    gap: var(--spacing-sm);
}

.resolution-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.resolution-btn:hover {
    border-color: var(--color-primary);
    background: var(--color-surface-hover);
}

.resolution-btn.active {
    border-color: var(--color-primary);
    background: var(--color-primary-subtle);
    color: var(--color-text);
}

.resolution-btn__scale {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
}

.resolution-btn__credits {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.resolution-btn.active .resolution-btn__credits {
    color: var(--color-primary);
}

/* Info List */
.upscaler-info {
    list-style: disc;
    padding-left: var(--spacing-lg);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.upscaler-info li {
    margin-bottom: var(--spacing-xs);
}

/* ==========================================================================
   Upload Previews (multi-file grid)
   ========================================================================== */

.upload-previews {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(72px, 1fr));
    gap: var(--spacing-sm);
    width: 100%;
    padding: var(--spacing-sm);
}

.upload-preview {
    position: relative;
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--color-bg-elevated, #0d0d0d);
}

.upload-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.upload-preview__remove {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--alpha-black-70);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    cursor: pointer;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.upload-preview:hover .upload-preview__remove {
    opacity: 1;
}

.upload-preview__remove:hover {
    background: var(--color-error, var(--color-error));
}

/* Add more button */
.upload-preview--add {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-muted);
    cursor: pointer;
    font-size: var(--font-size-xs);
    transition: all var(--transition-fast);
    background: transparent;
}

.upload-preview--add:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-primary-subtle);
}

/* ==========================================================================
   Button Extras
   ========================================================================== */

.btn-cost {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    margin-left: var(--spacing-sm);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    background: var(--alpha-white-15);
    border-radius: var(--radius-full);
    opacity: 0.85;
}

.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* ==========================================================================
   Results Grid
   ========================================================================== */

.upscaler-form__right {
    min-height: 300px;
}

.upscaler-results {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--spacing-md);
    min-height: 200px;
}

.upscaler-results .empty-state {
    grid-column: 1 / -1;
}

/* ==========================================================================
   Result Card
   ========================================================================== */

.upscale-card {
    position: relative;
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.upscale-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--alpha-black-40);
}

.upscale-card__media {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-surface-light, #151515);
    overflow: hidden;
}

.upscale-card__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-fast);
}

.upscale-card:hover .upscale-card__media img {
    transform: scale(1.03);
}

/* Overlay */
.upscale-card__overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    background: var(--alpha-black-50);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.upscale-card:hover .upscale-card__overlay {
    opacity: 1;
}

/* Dimensions badge */
.upscale-card__dimensions {
    position: absolute;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 10px;
    background-color: var(--alpha-black-70);
    backdrop-filter: blur(8px);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: var(--color-text);
    z-index: 1;
}

.upscale-card__dimensions .dim-old {
    color: var(--alpha-white-50);
}

.upscale-card__dimensions .dim-arrow {
    color: var(--color-primary);
    font-size: var(--font-size-xs);
}

.upscale-card__dimensions .dim-new {
    color: var(--color-success);
    font-weight: var(--font-weight-semibold);
}

/* Before/After Toggle Button */
.before-after-btn {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background: var(--alpha-black-70);
    backdrop-filter: blur(8px);
    border: 1px solid var(--alpha-white-15);
    border-radius: var(--radius-full);
    color: var(--color-text);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    z-index: 2;
    transition: all var(--transition-fast);
    opacity: 0;
}

.upscale-card:hover .before-after-btn {
    opacity: 1;
}

.before-after-btn:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.before-after-btn--active {
    background: rgba(254, 6, 189, 0.6);
    border-color: var(--color-primary);
}

.before-after-btn svg {
    flex-shrink: 0;
}

/* Card action buttons */
.card-action-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--alpha-white-15);
    backdrop-filter: blur(8px);
    border: 1px solid var(--color-text-disabled);
    border-radius: var(--radius-md);
    color: white;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.card-action-btn:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    transform: scale(1.1);
}

/* ==========================================================================
   Processing Card
   ========================================================================== */

.upscale-card--processing {
    cursor: default;
}

.upscale-card--processing:hover {
    transform: none;
    box-shadow: none;
}

.upscale-card--processing .upscale-card__media {
    background: linear-gradient(135deg, rgba(254, 6, 189, 0.05) 0%, var(--color-surface) 100%);
}

.processing-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.processing-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-surface-lighter, #1a1a1a);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.processing-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    font-weight: var(--font-weight-medium);
    text-align: center;
}

.processing-filename {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    max-width: 150px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    text-align: center;
}

.processing-progress {
    width: 120px;
    height: 4px;
    background: var(--color-surface-light, #151515);
    border-radius: var(--radius-xs);
    overflow: hidden;
}

.processing-progress__bar {
    height: 100%;
    background: var(--color-primary);
    border-radius: var(--radius-xs);
    transition: width 0.5s ease;
    width: 0%;
}

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

/* ==========================================================================
   Error / Failed Card
   ========================================================================== */

.upscale-card--failed {
    cursor: default;
}

.upscale-card--failed:hover {
    transform: none;
    box-shadow: none;
}

.upscale-card--failed .upscale-card__media {
    background: linear-gradient(135deg, var(--color-error-subtle) 0%, var(--color-surface) 100%);
}

.error-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-error, var(--color-error));
    text-align: center;
    padding: var(--spacing-md);
}

.error-indicator span {
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-base);
}

/* ==========================================================================
   Responsive — Tablet (<=992px)
   ========================================================================== */

@media (max-width: 992px) {
    .upscaler-form {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .upscaler-form__left {
        max-width: 100%;
    }

    .upscaler-form__left .upload-zone {
        min-height: 150px;
    }

    .upscaler-results {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    }
}

/* ==========================================================================
   Responsive — Mobile (<=640px)
   ========================================================================== */

@media (max-width: 640px) {
    .upscaler-page {
        padding: 0 var(--spacing-sm);
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .upscaler-form {
        gap: var(--spacing-md);
    }

    .upscaler-form__left .upload-zone {
        min-height: 120px;
        padding: var(--spacing-lg);
    }

    .upload-previews {
        grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
        gap: 6px;
        padding: 6px;
    }

    .upscaler-results {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }

    .upscaler-info {
        font-size: var(--font-size-xs);
    }

    .card-action-btn {
        width: 34px;
        height: 34px;
    }

    .processing-spinner {
        width: 32px;
        height: 32px;
    }

    .processing-progress {
        width: 90px;
    }
}

/* ==========================================================================
   Responsive — Small mobile (<=380px)
   ========================================================================== */

@media (max-width: 380px) {
    .upscaler-results {
        grid-template-columns: repeat(2, 1fr);
        gap: 6px;
    }

    .upload-previews {
        grid-template-columns: repeat(auto-fill, minmax(52px, 1fr));
    }
}