:root {
    --primary: #0B5ED7;
    --primary-hover: #0a58ca;
    --secondary: #5a1aad;
    --success: #06d6a0;
    --light: #f8f9fa;
    --dark: #212529;
    --danger: #dc3545;
}

body {
    background-color: var(--light);
    font-family: 'Inter', sans-serif;
}

.main-form-card {
    max-width: 900px;
    margin: 2rem auto;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border-radius: 15px;
    border: none;
    overflow: hidden;
}

.card-header {
    background: linear-gradient(to right, var(--primary), var(--secondary));
    color: white;
    padding: 1.5rem;
    text-align: center;
    border-bottom: none;
}

.card-header h1 {
    font-weight: 700;
    margin-bottom: 0.25rem;
    color: white;
}

.card-header p {
    color: rgba(255, 255, 255, 0.85);
}

.card-body {
    background: white;
    padding: 2rem;
}

.form-section {
    padding: 0;
    margin-bottom: 0;
    background-color: transparent; 
    border: none; 
    border-radius: 0;
}

.section-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 1.5rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--primary);
    display: flex;
    align-items: center;
    gap: 10px;
    justify-content: center;
}

.section-title i {
    color: var(--primary);
}

.form-label {
    font-weight: 500;
    color: var(--dark);
}

.form-label.required::after {
    content: " *";
    color: var(--danger);
}

.form-control, .form-select {
    border-radius: 0.375rem;
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 0.25rem rgba(11, 94, 215, 0.25);
}

.invalid-feedback {
    display: none;
    width: 100%;
    margin-top: 0.25rem;
    font-size: 0.875em;
    color: var(--danger);
}

.is-invalid + .invalid-feedback,
.was-validated :invalid ~ .invalid-feedback {
    display: block;
}

.card-footer {
    background-color: #ffffff;
    padding: 1.5rem 2rem;
    border-top: 1px solid #e9ecef;
}

.btn-primary {
    background-color: var(--primary);
    border-color: var(--primary);
    color: #ffffff;
    font-weight: 500;
}

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

.card-body .alert {
    border-radius: .5rem;
    font-size: 0.95rem;
}

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