/* Custom CSS */
:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary-color: #f59e0b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --background-light: #f9fafb;
    --background-white: #ffffff;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

body {
    background-color: var(--background-light);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

/* Navbar styling */
.navbar {
    background-color: var(--background-white) !important;
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--border-color);
}

.navbar-brand {
    font-weight: 600;
    color: var(--text-primary) !important;
}

.nav-link {
    color: var(--text-secondary) !important;
    transition: color 0.2s ease;
}

.nav-link:hover {
    color: var(--primary-color) !important;
}

#generateQRBtn {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    border-radius: 8px;
    padding: 0.5rem 1.25rem;
    transition: all 0.2s ease;
}

#generateQRBtn:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Alert styling */
.alert-warning {
    background-color: #fef3c7;
    border: 1px solid #fcd34d;
    color: #92400e;
    border-radius: 12px;
}

.alert-warning a {
    color: #d97706;
    font-weight: 500;
}

/* Search Controls */
.search-controls {
    background-color: var(--background-white);
    padding: 2rem;
    border-radius: 16px;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.search-controls .form-control,
.search-controls .form-select {
    border-radius: 10px;
    border: 2px solid var(--border-color);
    padding: 0.75rem 1rem;
    font-size: 0.95rem;
    transition: all 0.2s ease;
}

.search-controls .form-control:focus,
.search-controls .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    outline: none;
}

.search-controls .form-control::placeholder {
    color: var(--text-muted);
}

/* Card Styles */
.instance-card {
    transition: all 0.3s ease;
    height: 100%;
    cursor: pointer;
    border: 1px solid var(--border-color);
    border-radius: 0;
    overflow: hidden;
    position: relative;
    background-color: var(--background-white);
    box-shadow: var(--shadow-sm);
}

.instance-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-light);
}

.instance-card .card-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 100%);
    color: white;
    padding: 1.5rem;
    border-bottom: none;
}

.instance-card .card-header h5 {
    margin: 0;
    font-weight: 600;
    font-size: 1.1rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.instance-card .card-header .instance-host {
    font-size: 0.85rem;
    opacity: 0.95;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 0.25rem;
}

.instance-card .card-body {
    padding: 1.5rem;
}

.instance-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1.25rem;
    min-height: 2.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.5;
}

.language-info {
    padding: 0.5rem 0.75rem;
    background-color: var(--background-light);
    border: 1px solid var(--border-color);
    font-size: 0.85rem;
}

.language-label {
    color: var(--text-muted);
    font-weight: 500;
    margin-right: 0.5rem;
}

.language-value {
    color: var(--text-primary);
}

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

.stat-item {
    display: flex;
    flex-direction: column;
    padding: 0.75rem;
    background-color: var(--background-light);
    border-radius: 0;
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

.stat-item:hover {
    background-color: #f3f4f6;
    border-color: var(--primary-light);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card-footer {
    background-color: var(--background-light);
    border-top: 1px solid var(--border-color);
    padding: 1rem 1.5rem;
}

.card-footer .gap-2 {
    gap: 0.5rem !important;
}

.card-footer .d-flex {
    align-items: center;
}

@media (max-width: 991px) {
    .card-footer .d-flex {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .card-footer .d-flex > div:first-child {
        width: 100%;
        margin-bottom: 0.5rem;
    }
    
    .card-actions {
        margin-left: 0;
        width: 100%;
        justify-content: center;
    }
}

.version-badge {
    font-size: 0.75rem;
    padding: 0.375rem 0.75rem;
    background-color: var(--background-white);
    border: 1px solid var(--border-color);
    border-radius: 0;
    color: var(--text-secondary);
    font-weight: 500;
    max-width: 150px;
    text-align: center;
    display: inline-block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.signup-badge {
    font-size: 0.75rem;
    padding: 0.375rem 0.75rem;
    border-radius: 0;
    font-weight: 500;
    min-width: 100px;
    text-align: center;
    display: inline-block;
}

.signup-badge.open {
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid #6ee7b7;
}

.signup-badge.closed {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid #fca5a5;
}

/* Action buttons */
.card-actions {
    display: flex;
    gap: 0.5rem;
    margin-left: auto;
}

.action-btn {
    width: 36px;
    height: 36px;
    border-radius: 0;
    background-color: var(--background-white);
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
}

.action-btn:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.action-btn:hover i {
    color: white;
}

.action-btn i {
    font-size: 16px;
    color: var(--text-secondary);
    transition: color 0.2s ease;
}

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

/* Loading and No Results */
#loadingSpinner {
    color: var(--primary-color);
    padding: 4rem 0;
}

#loadingSpinner .spinner-border {
    width: 3rem;
    height: 3rem;
    border-width: 0.3rem;
}

#noResults {
    color: var(--text-secondary);
    padding: 4rem 0;
}

#noResults h4 {
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

/* Footer */
.footer {
    background-color: var(--background-white) !important;
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
}

.footer .text-muted {
    color: var(--text-secondary) !important;
}

/* SweetAlert2 customizations */
.swal2-popup {
    border-radius: 16px;
    font-family: inherit;
}

.swal2-popup .swal2-actions .swal2-confirm,
.swal2-popup .swal2-actions .swal2-cancel {
    margin: 0 5px;
    border-radius: 12px !important;
    padding: 0.75rem 1.5rem !important;
    font-weight: 500 !important;
    border: 2px solid transparent !important;
    font-size: 0.95rem !important;
    transition: all 0.2s ease !important;
}

.swal2-popup .swal2-actions .swal2-confirm {
    background-color: var(--primary-color) !important;
    color: white !important;
}

.swal2-popup .swal2-actions .swal2-confirm:hover {
    background-color: var(--primary-dark) !important;
    transform: translateY(-1px) !important;
}

.swal2-popup .swal2-actions .swal2-cancel {
    background-color: #e5e7eb !important;
    color: var(--text-primary) !important;
}

.swal2-popup .swal2-actions .swal2-cancel:hover {
    background-color: #d1d5db !important;
    transform: translateY(-1px) !important;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .search-controls {
        padding: 1.5rem;
    }
    
    .search-controls .row > div {
        margin-bottom: 1rem;
    }
    
    .search-controls .row > div:last-child {
        margin-bottom: 0;
    }
    
    .instance-card .card-header {
        padding: 1.25rem;
    }
    
    .instance-card .card-body {
        padding: 1.25rem;
    }
}

/* Smooth animations */
.instance-card {
    animation: fadeIn 0.4s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--background-light);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* Utility classes */
.container {
    max-width: 1280px;
}