/* CSS Variables */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #64748b;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --dark: #1e293b;
    --light: #f8fafc;
    --border: #e2e8f0;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.1);
    --radius: 8px;
    --radius-lg: 12px;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--light);
    color: var(--dark);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: var(--primary);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* Navigation */
.navbar {
    background: white;
    border-bottom: 1px solid var(--border);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-brand:hover {
    text-decoration: none;
}

.navbar-nav {
    display: flex;
    gap: 1rem;
    list-style: none;
}

.nav-link {
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    color: var(--secondary);
    font-weight: 500;
    transition: all 0.2s;
}

.nav-link:hover {
    background: var(--light);
    color: var(--dark);
    text-decoration: none;
}

.nav-link.active {
    background: var(--primary);
    color: white;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.container-sm {
    max-width: 500px;
}

/* Hero */
.hero {
    text-align: center;
    padding: 4rem 2rem;
    background: linear-gradient(135deg, var(--primary) 0%, #7c3aed 100%);
    color: white;
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.25rem;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto 2rem;
}

/* Cards */
.card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    font-weight: 600;
    font-size: 1.1rem;
}

.card-body {
    padding: 1.5rem;
}

/* Grid */
.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

/* Photo Grid */
.photo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.photo-card {
    position: relative;
    aspect-ratio: 3/4;
    border-radius: var(--radius);
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.photo-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.photo-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.photo-card .overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1rem;
    background: linear-gradient(transparent, rgba(0,0,0,0.8));
    color: white;
}

.photo-card .tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.photo-card .selected-badge {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: var(--success);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
}

/* Tags/Badges */
.tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(255,255,255,0.2);
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-primary { background: var(--primary); color: white; }
.badge-success { background: var(--success); color: white; }
.badge-warning { background: var(--warning); color: white; }
.badge-secondary { background: var(--secondary); color: white; }

/* Forms */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--dark);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-control::placeholder {
    color: var(--secondary);
}

select.form-control {
    cursor: pointer;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn:hover {
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-secondary {
    background: var(--secondary);
    color: white;
}

.btn-secondary:hover {
    background: var(--dark);
}

.btn-success {
    background: var(--success);
    color: white;
}

.btn-success:hover {
    background: #059669;
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-danger:hover {
    background: #dc2626;
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: white;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

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

.btn-block {
    width: 100%;
}

/* Button Groups */
.btn-group {
    display: flex;
    gap: 0.5rem;
}

/* Alerts */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
    margin-bottom: 1rem;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.alert-danger {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-warning {
    background: #fef3c7;
    color: #92400e;
    border: 1px solid #fde68a;
}

.alert-info {
    background: #dbeafe;
    color: #1e40af;
    border: 1px solid #bfdbfe;
}

/* Tables */
.table {
    width: 100%;
    border-collapse: collapse;
}

.table th,
.table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

.table th {
    font-weight: 600;
    background: var(--light);
}

.table tbody tr:hover {
    background: var(--light);
}

/* Filters */
.filters {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    padding: 1rem;
    background: white;
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow);
}

.filters .form-control {
    width: auto;
    min-width: 150px;
}

/* Stats */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: white;
    padding: 1.5rem;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow);
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    color: var(--secondary);
    font-size: 0.875rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--secondary);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state h3 {
    margin-bottom: 0.5rem;
    color: var(--dark);
}

/* Upload Area */
.upload-area {
    border: 2px dashed var(--border);
    border-radius: var(--radius-lg);
    padding: 3rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    background: white;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--primary);
    background: rgba(37, 99, 235, 0.05);
}

.upload-area input[type="file"] {
    display: none;
}

.upload-area svg {
    width: 48px;
    height: 48px;
    margin-bottom: 1rem;
    color: var(--secondary);
}

/* Preview Grid */
.preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.preview-item {
    position: relative;
    aspect-ratio: 1;
    border-radius: var(--radius);
    overflow: hidden;
}

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

.preview-item .remove-btn {
    position: absolute;
    top: 0.25rem;
    right: 0.25rem;
    width: 24px;
    height: 24px;
    background: var(--danger);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Modal */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s;
}

.modal-backdrop.show {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: white;
    border-radius: var(--radius-lg);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9);
    transition: transform 0.2s;
}

.modal-backdrop.show .modal {
    transform: scale(1);
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--secondary);
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 0.5rem;
}

/* User Info */
.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem;
    background: var(--light);
    border-radius: var(--radius);
}

.user-avatar {
    width: 36px;
    height: 36px;
    background: var(--primary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

/* Tabs */
.tabs {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 1.5rem;
}

.tab {
    padding: 1rem 1.5rem;
    border: none;
    background: none;
    cursor: pointer;
    font-weight: 500;
    color: var(--secondary);
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: all 0.2s;
}

.tab:hover {
    color: var(--dark);
}

.tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

/* Utility */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--secondary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .navbar {
        flex-direction: column;
        gap: 0.75rem;
        padding: 1rem;
    }

    .navbar-nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.5rem;
    }

    .nav-link {
        padding: 0.375rem 0.75rem;
        font-size: 0.875rem;
    }

    .container {
        padding: 1rem;
    }

    .container-sm {
        max-width: 100%;
    }

    .filters {
        flex-direction: column;
    }

    .filters .form-control {
        width: 100%;
    }

    .photo-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 0.75rem;
    }

    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }

    .stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .stat-card {
        padding: 1rem;
    }

    .stat-value {
        font-size: 1.5rem;
    }

    .btn {
        padding: 0.625rem 1rem;
    }

    .btn-lg {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }

    .card-header,
    .card-body {
        padding: 1rem;
    }

    .user-info {
        display: none;
    }

    .flex.justify-between {
        flex-direction: column;
        gap: 1rem;
    }

    h1 {
        font-size: 1.5rem;
    }

    /* Provider photos page - mobile adjustments */
    .card .flex {
        flex-direction: column;
    }

    .card .flex > div:first-child {
        width: 100%;
    }

    .card .flex > div:first-child img {
        width: 100%;
        height: auto;
        max-height: 250px;
    }
}

@media (max-width: 480px) {
    .navbar-brand {
        font-size: 1.25rem;
    }

    .photo-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .stats {
        grid-template-columns: 1fr 1fr;
        gap: 0.5rem;
    }

    .preview-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .tabs {
        flex-direction: column;
    }

    .tab {
        border-bottom: none;
        border-left: 2px solid transparent;
    }

    .tab.active {
        border-left-color: var(--primary);
    }
}

/* Loading Spinner */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem;
}

/* Campaign Card */
.campaign-card {
    background: white;
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
}

.campaign-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.campaign-card h3 {
    margin-bottom: 0.5rem;
}

.campaign-card p {
    color: var(--secondary);
    margin-bottom: 1rem;
}

.campaign-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--secondary);
}

/* Photo Preview Modal */
.photo-preview-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.photo-preview-modal.show {
    opacity: 1;
    visibility: visible;
}

.photo-preview-content {
    max-width: 90vw;
    max-height: 90vh;
    position: relative;
}

.photo-preview-content img {
    max-width: 100%;
    max-height: 85vh;
    object-fit: contain;
    border-radius: var(--radius);
}

.photo-preview-close {
    position: absolute;
    top: -40px;
    right: 0;
    background: none;
    border: none;
    color: white;
    font-size: 2rem;
    cursor: pointer;
    padding: 0.5rem;
    line-height: 1;
}

.photo-preview-info {
    color: white;
    text-align: center;
    margin-top: 1rem;
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

.photo-preview-info .tag {
    background: rgba(255, 255, 255, 0.2);
}

/* Justify center utility */
.justify-center { justify-content: center; }