body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
    color: #333;
}

.logo {
    max-height: 80px;
    margin-bottom: 20px;
}

h1, h2, h3, h4, h5 {
    color: #2c3e50;
}

.card {
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
    border: none;
}

.card-header {
    border-radius: 10px 10px 0 0 !important;
}

.form-control, .form-select {
    padding: 10px;
    border-radius: 5px;
    border: 1px solid #ced4da;
}

.form-control:focus, .form-select:focus {
    border-color: #86b7fe;
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
}

.btn-primary {
    background-color: #3498db;
    border-color: #3498db;
    padding: 10px 20px;
    font-weight: 500;
}

.btn-primary:hover {
    background-color: #2980b9;
    border-color: #2980b9;
}

.invalid-feedback {
    color: #e74c3c;
}

.sticky-top {
    position: sticky;
    top: 20px;
}

.required-field::after {
    content: " *";
    color: #e74c3c;
}

@media (max-width: 768px) {
    .sticky-top {
        position: static;
    }
}