/* Photos Page - Clean Confidence Dashboard */

:root {
    /* === Core Colors (Using design tokens) === */
    --color-base: 0, 0, 0;
    --color-white: 255, 255, 255;
    --color-primary: 0, 138, 67;
    --color-primary-dark: 0, 138, 67;

    /* === Semantic Colors === */
    --color-text-primary: rgba(var(--color-base), 0.95);
    --color-text-secondary: rgba(var(--color-base), 0.50);
    --color-text-tertiary: rgba(var(--color-base), 0.40);

    --color-bg-primary: rgba(var(--color-white), 1);
    --color-bg-secondary: rgba(var(--color-base), 0.03);
    --color-bg-tertiary: rgba(var(--color-base), 0.06);

    --color-border-light: rgba(var(--color-base), 0.08);
    --color-border-medium: rgba(var(--color-base), 0.15);

    --color-primary-solid: rgb(var(--color-primary));
    --color-primary-light: rgba(var(--color-primary), 0.10);
    --color-primary-dark-solid: rgb(var(--color-primary-dark));

    --color-shadow-sm: rgba(var(--color-base), 0.08);
    --color-shadow-md: rgba(var(--color-base), 0.15);

    /* === Spacing Scale === */
    --space-1: 0.5rem;
    --space-2: 1rem;
    --space-3: 1.5rem;
    --space-4: 2rem;
    --space-5: 2.5rem;
    --space-6: 3rem;

    /* === Border Radius === */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;

    /* === Transitions === */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* === ACCESSIBILITY: Focus States === */
*:focus-visible {
    outline: 2px solid rgba(var(--color-primary), 1);
    outline-offset: 2px;
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
    outline: 2px solid rgba(var(--color-primary), 1);
    outline-offset: 2px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--color-bg-secondary);
    color: var(--color-text-primary);
    line-height: 1.6;
}

/* Container */
.container {
    min-height: 100vh;
    max-width: 1400px;
    margin: 0 auto;
}

/* Header */
.header {
    background: white;
    border-bottom: 3px solid rgba(var(--color-primary), 1);
    padding: var(--space-3) var(--space-4);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.facility-name {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.back-link {
    color: rgba(var(--color-primary), 1);
    text-decoration: none;
    font-weight: 500;
    transition: opacity var(--transition-fast);
}

.back-link:hover {
    opacity: 0.7;
}

/* Page Title */
.page-header {
    text-align: center;
    margin: var(--space-5) var(--space-4);
}

.page-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--space-1);
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
}

.page-header .subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
}


/* === LINK HOVER STATES === */
a:not(.btn):not(.back-button):hover {
    opacity: 0.7;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: var(--space-1);
    letter-spacing: -0.02em;
}

.header .subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    font-weight: 500;
}

/* Loading State */
.loading-state {
    margin: 0 var(--space-4);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
    text-align: center;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--color-border-light);
    border-top-color: var(--color-primary-solid);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading-state p {
    margin-top: var(--space-3);
    color: var(--color-text-secondary);
    font-size: 1.125rem;
}

/* Error State */
.error-state {
    margin: 0 var(--space-4);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
    text-align: center;
}

.error-state svg {
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-3);
}

.error-state h2 {
    font-size: 1.5rem;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.error-state p {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-4);
}

/* Empty State */
.empty-state {
    margin: 0 var(--space-4);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-6);
    text-align: center;
}

.empty-state svg {
    color: var(--color-text-tertiary);
    margin-bottom: var(--space-3);
}

.empty-state h2 {
    font-size: 1.5rem;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.empty-state p {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    max-width: 500px;
}

/* Photo Gallery */
.photo-gallery {
    margin: 0 var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

/* Date Section */
.photo-date-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.photo-date-header {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
    padding-bottom: var(--space-2);
    border-bottom: 2px solid var(--color-border-light);
}

/* Photo Grid - Before/After Pairs */
.photo-pairs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(500px, 1fr));
    gap: var(--space-4);
}

/* Photo Pair Card */
.photo-pair-card {
    background: var(--color-bg-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 2px 8px var(--color-shadow-sm);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    cursor: pointer;
}

.photo-pair-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px var(--color-shadow-md);
}

.photo-pair-card:active {
    transform: translateY(-2px);
}

/* Photo Pair Header */
.photo-pair-header {
    padding: var(--space-3);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--color-border-light);
}

.photo-area-name {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-text-primary);
}

.photo-date {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    font-weight: 500;
}

/* Before/After Images Container */
.before-after-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1px;
    background: var(--color-border-light);
}

.photo-wrapper {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
    background: var(--color-bg-tertiary);
}

.photo-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.photo-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-2);
    background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
    color: white;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Photo Pair Footer */
.photo-pair-footer {
    padding: var(--space-3);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--color-bg-secondary);
}

.photo-technician {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.photo-technician::before {
    content: "👤 ";
}

/* Lightbox Modal */
.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
}

.lightbox.active {
    display: flex;
}

.lightbox-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.95);
    cursor: pointer;
}

.lightbox-content {
    position: relative;
    width: 90vw;
    max-width: 1200px;
    max-height: 90vh;
    background: var(--color-bg-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

/* Lightbox Header */
.lightbox-header {
    padding: var(--space-3) var(--space-4);
    background: var(--color-bg-secondary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--color-border-light);
}

.lightbox-info h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-primary);
    margin-bottom: 0.25rem;
}

.lightbox-info p {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.lightbox-close {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    border: none;
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
}

.lightbox-close:hover {
    background: var(--color-border-medium);
    transform: scale(1.05);
}

.lightbox-close:active {
    transform: scale(0.98);
}

/* Lightbox Body */
.lightbox-body {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: auto;
    padding: var(--space-4);
    background: var(--color-bg-secondary);
}

.comparison-container {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.comparison-image {
    position: relative;
    max-width: 100%;
    max-height: 100%;
}

.comparison-image img {
    max-width: 100%;
    max-height: 70vh;
    object-fit: contain;
    border-radius: var(--radius-md);
}

.comparison-image .image-label {
    position: absolute;
    top: var(--space-2);
    left: var(--space-2);
    padding: 0.5rem 1rem;
    background: rgba(0, 0, 0, 0.8);
    color: white;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Lightbox Footer */
.lightbox-footer {
    padding: var(--space-3) var(--space-4);
    background: var(--color-bg-secondary);
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-top: 1px solid var(--color-border-light);
}

.nav-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--color-bg-primary);
    border: 2px solid var(--color-border-light);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-primary);
    cursor: pointer;
    transition: all var(--transition-base);
}

.nav-btn:hover {
    background: var(--color-bg-tertiary);
    border-color: var(--color-border-medium);
    transform: translateY(-2px);
}

.nav-btn:active {
    transform: translateY(0);
}

.nav-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.nav-btn:disabled:hover {
    transform: none;
}

.nav-btn svg {
    width: 20px;
    height: 20px;
}

.photo-counter {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

/* === STANDARDIZED BUTTON SYSTEM === */
/* Buttons */
.btn-primary {
    padding: 1rem 2rem;
    background: var(--color-primary-solid);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-block;
    text-decoration: none;
    text-align: center;
}

.btn-primary:hover {
    background: var(--color-primary-dark-solid);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(var(--color-primary), 0.3);
}

.btn-primary:active {
    transform: translateY(0);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: var(--space-2);
    }

    .header h1 {
        font-size: 2rem;
    }

    .header .subtitle {
        font-size: 1rem;
    }

    .photo-pairs-grid {
        grid-template-columns: 1fr;
    }

    .lightbox-content {
        width: 95vw;
        max-height: 95vh;
    }

    .lightbox-header,
    .lightbox-footer {
        padding: var(--space-2) var(--space-3);
    }

    .lightbox-body {
        padding: var(--space-2);
    }

    .nav-btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }

    .nav-btn span {
        display: none;
    }

    .photo-counter {
        font-size: 0.875rem;
    }
}

@media (max-width: 640px) {
    .before-after-container {
        grid-template-columns: 1fr;
    }

    .photo-pairs-grid {
        grid-template-columns: 1fr;
        gap: var(--space-3);
    }
}