:root {
    --primary-color: #0a3255;
    --secondary-color: #ffffff;
}

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 */
.navbar-brand {
    font-weight: bold;
    font-size: 1.3rem;
}

.navbar-dark .navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.9);
    transition: color 0.3s;
}

.navbar-dark .navbar-nav .nav-link:hover {
    color: #ffffff;
}

/* Cards */
.card {
    border: none;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    border-radius: 0.5rem;
    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);
}

.card-header {
    background-color: var(--primary-color);
    color: white;
    font-weight: 600;
    border-radius: 0.5rem 0.5rem 0 0 !important;
}

/* Buttons */
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    transition: all 0.3s;
}

.btn-primary:hover {
    background-color: #082844;
    border-color: #082844;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

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

/* Tables */
.table {
    background-color: white;
}

.table thead th {
    border-bottom: 2px solid var(--primary-color);
    color: var(--primary-color);
    font-weight: 600;
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: rgba(10, 50, 85, 0.05);
}

.table-hover tbody tr:hover {
    background-color: rgba(10, 50, 85, 0.1);
}

/* Forms */
.form-control:focus,
.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(10, 50, 85, 0.25);
}

.form-label {
    font-weight: 500;
    color: #495057;
    margin-bottom: 0.5rem;
}

/* Alerts */
.alert {
    border: none;
    border-radius: 0.5rem;
}

/* Badges */
.badge {
    padding: 0.5em 0.75em;
    font-weight: 500;
}

/* Modal */
.modal-header {
    background-color: var(--primary-color);
    color: white;
}

.modal-header .btn-close {
    filter: invert(1);
}

/* Stats Cards */
.card.text-white h5 {
    font-size: 0.9rem;
    font-weight: 500;
    opacity: 0.9;
}

.card.text-white .display-4 {
    font-size: 2.5rem;
    font-weight: bold;
}

/* List Group */
.list-group-item.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.list-group-item:hover {
    background-color: rgba(10, 50, 85, 0.05);
    cursor: pointer;
}

/* Dropdown */
.dropdown-menu {
    border: none;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.dropdown-item:hover {
    background-color: rgba(10, 50, 85, 0.1);
    color: var(--primary-color);
}

/* Footer */
footer {
    background-color: white;
    margin-top: auto;
}

/* Loading Animation */
.spinner-border {
    color: var(--primary-color);
}

/* Responsive */
@media (max-width: 768px) {
    .navbar-brand {
        font-size: 1.1rem;
    }

    .card.text-white .display-4 {
        font-size: 2rem;
    }

    .table-responsive {
        font-size: 0.9rem;
    }

    .btn-sm {
        font-size: 0.75rem;
        padding: 0.25rem 0.5rem;
    }
}

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

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #082844;
}

/* Animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card,
.alert {
    animation: fadeIn 0.3s ease-in;
}

/* Print Styles */
@media print {
    .navbar,
    .btn,
    footer {
        display: none;
    }

    .card {
        box-shadow: none;
        border: 1px solid #dee2e6;
    }
}

/* Dark Mode Support (Optional) */
@media (prefers-color-scheme: dark) {
    body {
        background-color: #1a1a1a;
        color: #e0e0e0;
    }

    .card {
        background-color: #2a2a2a;
        color: #e0e0e0;
    }

    .table {
        background-color: #2a2a2a;
        color: #e0e0e0;
    }
}

/* Custom Utilities */
.text-primary-custom {
    color: var(--primary-color) !important;
}

.bg-primary-custom {
    background-color: var(--primary-color) !important;
}

.shadow-custom {
    box-shadow: 0 0.5rem 1rem rgba(10, 50, 85, 0.15) !important;
}

.border-primary-custom {
    border-color: var(--primary-color) !important;
}