:root {
    --primary-color: #1a237e;
    --secondary-color: #283593;
    --accent-color: #3949ab;
    --light-color: #e8eaf6;
    --dark-color: #10143a;
}

body {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    min-height: 100vh;
}

.bg-gradient-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

.sidebar {
    background: linear-gradient(180deg, var(--dark-color) 0%, var(--primary-color) 100%);
    min-height: 100vh;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
}

.sidebar .nav-link {
    color: rgba(255, 255, 255, 0.8);
    border-left: 3px solid transparent;
    transition: all 0.3s;
}

.sidebar .nav-link:hover {
    color: #fff;
    background-color: rgba(255, 255, 255, 0.1);
    border-left-color: var(--accent-color);
}

.sidebar .nav-link.active {
    color: #fff;
    background-color: rgba(255, 255, 255, 0.15);
    border-left-color: var(--accent-color);
}

.card {
    border: none;
    border-radius: 0.5rem;
    box-shadow: 0 0.15rem 1.75rem 0 rgba(58, 59, 69, 0.15);
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 0.5rem 2rem 0 rgba(58, 59, 69, 0.2);
}

.btn-primary {
    background: linear-gradient(to right, var(--primary-color), var(--accent-color));
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(to right, var(--accent-color), var(--primary-color));
}

.table th {
    border-top: none;
    background-color: var(--light-color);
}

.breadcrumb {
    background-color: transparent;
    padding: 0;
}

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

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

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

.badge-primary {
    background: linear-gradient(to right, var(--primary-color), var(--accent-color));
}