:root {
    --primary-color: #4e73df;
    --secondary-color: #2e59d9;
    --success-color: #1cc88a;
    --info-color: #36b9cc;
    --warning-color: #f6c23e;
    --danger-color: #e74a3b;
    --bg-color: #f8f9fc;
    --text-color: #5a5c69;
    --card-bg: #ffffff;
    --border-color: #e3e6f0;
}

body {
    font-family: 'Nunito', 'Segoe UI', Roboto, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

.navbar {
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    color: white !important;
}

.nav-link {
    color: rgba(255, 255, 255, 0.8) !important;
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: all 0.2s;
}

.nav-link:hover, .nav-link.active {
    color: white !important;
    transform: translateY(-2px);
}

.card {
    border: none;
    border-radius: 8px;
    box-shadow: 0 0.15rem 1.75rem 0 rgba(58, 59, 69, 0.15);
    margin-bottom: 24px;
    background-color: var(--card-bg);
}

.card-header {
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    font-weight: 600;
    border-radius: 8px 8px 0 0 !important;
    padding: 12px 20px;
}

.btn-primary {
    background: linear-gradient(90deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border: none;
    font-weight: 600;
    padding: 10px 20px;
    border-radius: 5px;
    transition: all 0.2s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 10px rgba(0, 0, 0, 0.2);
    background: linear-gradient(90deg, var(--secondary-color) 0%, var(--primary-color) 100%);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.25rem rgba(78, 115, 223, 0.25);
}

.form-label {
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #4e5458;
}

.footer {
    background-color: #f1f3f9;
    padding: 20px 0;
    color: #6c757d;
}

.alert {
    border-radius: 8px;
    padding: 16px;
    margin-bottom: 24px;
}