/* Modern Variables */
:root {
    --primary: #4361ee;
    --primary-dark: #3a56d4;
    --secondary: #3f37c9;
    --success: #4bb543;
    --info: #00b4d8;
    --warning: #f8961e;
    --danger: #ef233c;
    --light: #f8f9fa;
    --dark: #212529;
    --gray: #6c757d;
    --gray-light: #e9ecef;
    --border-radius: 0.5rem;
    --box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    


/* Preloader */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

.loader {
    width: 48px;
    height: 48px;
    border: 5px solid var(--primary);
    border-bottom-color: transparent;
    border-radius: 50%;
    display: inline-block;
    box-sizing: border-box;
    animation: rotation 1s linear infinite;
}

@keyframes rotation {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}



/* Modern Card */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    margin-bottom: 1.5rem;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 1rem 2rem rgba(0, 0, 0, 0.15);
}

.card-header {
    background: white;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    font-weight: 600;
}

/* Modern Buttons */
.btn {
    border-radius: 50px;
    padding: 0.5rem 1.5rem;
    font-weight: 500;
    transition: var(--transition);
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.5px;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
}

/* Modern Table */
.table {
    --bs-table-bg: transparent;
    --bs-table-striped-bg: rgba(67, 97, 238, 0.02);
    --bs-table-hover-bg: rgba(67, 97, 238, 0.05);
    border-collapse: separate;
    border-spacing: 0;
    width: 100%;
}

.table th {
    background-color: #f8f9fa;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    color: var(--gray);
    border: none;
    padding: 1rem;
}

.table td {
    padding: 1rem;
    vertical-align: middle;
    border-top: 1px solid #f1f3f9;
}

.table tbody tr:hover {
    background-color: var(--bs-table-hover-bg);
}

/* Modern Form Controls */
.form-control, .form-select {
    border: 1px solid #e2e8f0;
    border-radius: var(--border-radius);
    padding: 0.6rem 1rem;
    transition: var(--transition);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 0.25rem rgba(67, 97, 238, 0.25);
}

/* Navbar */
.navbar {
    background: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    padding: 0.8rem 0;
}

.navbar-brand {
    font-weight: 700;
    color: var(--primary) !important;
    font-size: 1.5rem;
}

.nav-link {
    font-weight: 500;
    color: var(--dark) !important;
    padding: 0.5rem 1rem !important;
    margin: 0 0.2rem;
    border-radius: 50px;
    transition: var(--transition);
}

.nav-link:hover, .nav-link.active {
    background: rgba(67, 97, 238, 0.1);
    color: var(--primary) !important;
}

/* Badges */
.badge {
    padding: 0.4em 0.8em;
    font-weight: 500;
    border-radius: 50px;
}

/* Alert */
.alert {
    border: none;
    border-radius: var(--border-radius);
    padding: 1rem 1.5rem;
}

/* Page Header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #f1f3f9;
}

.page-title {
    margin: 0;
    font-weight: 700;
    color: var(--dark);
}

/* Responsive Adjustments */
@media (max-width: 768px) {
    .card {
        margin-bottom: 1rem;
    }
    
    .page-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .btn {
        padding: 0.4rem 1rem;
        font-size: 0.75rem;
    }
}

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

.animate-fade-in {
    animation: fadeIn 0.5s ease-out forwards;
}