:root {
    --primary-color: #0d6efd;
    --secondary-color: #6c757d;
    --success-color: #198754;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #0dcaf0;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
}

.navbar-brand img {
    filter: brightness(0) invert(1);
}

.card {
    border: none;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.btn {
    transition: all 0.2s;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 0.25rem 0.5rem rgba(0, 0, 0, 0.15);
}

.alert {
    border: none;
    border-left: 4px solid;
}

.alert-success {
    border-left-color: var(--success-color);
    background-color: #d1e7dd;
    color: #0f5132;
}

.alert-danger {
    border-left-color: var(--danger-color);
    background-color: #f8d7da;
    color: #842029;
}

.alert-warning {
    border-left-color: var(--warning-color);
    background-color: #fff3cd;
    color: #664d03;
}

.alert-info {
    border-left-color: var(--info-color);
    background-color: #cff4fc;
    color: #055160;
}

.navbar {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

.table {
    background-color: white;
}

.table-hover tbody tr:hover {
    background-color: rgba(13, 110, 253, 0.05);
}

.badge {
    font-weight: 500;
    padding: 0.35em 0.65em;
}

.list-group-item {
    border: 1px solid rgba(0, 0, 0, 0.125);
    transition: background-color 0.2s;
}

.list-group-item:hover {
    background-color: rgba(13, 110, 253, 0.05);
}

.card-header {
    border-bottom: 2px solid rgba(0, 0, 0, 0.125);
    font-weight: 600;
}

.card-footer {
    background-color: transparent;
    border-top: 1px solid rgba(0, 0, 0, 0.125);
}

#searchResults {
    animation: slideDown 0.2s ease-out;
}

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

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

.btn-link:hover {
    text-decoration: underline;
}

.toggle-favorite {
    cursor: pointer;
    transition: transform 0.2s;
}

.toggle-favorite:hover {
    transform: scale(1.2);
}

.bi {
    vertical-align: -0.125em;
}

footer {
    margin-top: auto;
    box-shadow: 0 -2px 4px rgba(0, 0, 0, 0.1);
}

.min-vh-100 {
    min-height: 100vh !important;
}

.display-1,
.display-2,
.display-3,
.display-4,
.display-5 {
    font-weight: 700;
}

.text-muted {
    opacity: 0.7;
}

.breadcrumb {
    background-color: transparent;
    padding: 0;
    margin-bottom: 1rem;
}

.breadcrumb-item + .breadcrumb-item::before {
    content: "›";
    font-size: 1.2em;
}

.input-group > .btn {
    border-color: #ced4da;
}

.input-group > .form-control:focus + .btn {
    border-color: var(--primary-color);
}

@media (max-width: 768px) {
    .navbar-collapse {
        background-color: rgba(13, 110, 253, 0.95);
        padding: 1rem;
        margin-top: 0.5rem;
        border-radius: 0.25rem;
    }
    
    .card {
        margin-bottom: 1rem;
    }
    
    #searchResults {
        width: 100% !important;
    }
}

.password-strength {
    height: 4px;
    border-radius: 2px;
    transition: all 0.3s;
}

.password-strength.weak {
    width: 33%;
    background-color: var(--danger-color);
}

.password-strength.medium {
    width: 66%;
    background-color: var(--warning-color);
}

.password-strength.strong {
    width: 100%;
    background-color: var(--success-color);
}

.spinner-border-sm {
    width: 1rem;
    height: 1rem;
    border-width: 0.15em;
}

.opacity-50 {
    opacity: 0.5;
}