body {
    background-color: #f4f7f6;
}

.registration-wrapper {
    margin-top: 60px;
    margin-bottom: 60px;
    background: #fff;
    border: 1px solid #e9ecef;
    border-radius: 2px;
    overflow: hidden;
    display: flex;
    flex-wrap: wrap;
}

.registration-image {
    flex: 1 1 50%;
    background-image: url(../img/contact.jpeg);
    background-size: cover;
    width: 80%;
    margin: auto;
    background-position: center;
    min-height: 500px;
}

.registration-form-container {
    flex: 1 1 50%;
    padding: 30px 60px 50px 60px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.registration-form-container h3 {
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 10px;
}

.registration-form-container p.subtitle {
    color: #6c757d;
    margin-bottom: 15px;
    font-size: 0.95rem;
}

.hotline-link {
    text-decoration: none;
    color: #dc3545;
    transition: color 0.3s ease; 
}

.hotline-link:hover {
    color: #750e19; 
}

.form-label {
    font-weight: 600;
    font-size: 0.95rem;
    color: #495057;
    margin-bottom: 8px;
}

.required {
    color: #dc3545;
    margin-left: 3px;
}

.form-control,
.form-select {
    border: 1px solid #ced4da;
    border-radius: 8px;
    padding: 12px 18px;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    background-color: #fdfdfd;
}

.form-control:focus,
.form-select:focus {
    border-color: #dc3545;
    background-color: #ffffff;
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.15);
}

.btn-register {
    background-color: #dc3545;
    color: #fff;
    border: none;
    padding: 15px 20px;
    border-radius: 8px;
    font-weight: bold;
    text-transform: uppercase;
    font-size: 1rem;
    width: 100%;
    transition: all 0.3s;
    margin-top: 15px;
}

.btn-register:hover {
    background-color: #c82333;
}

@media (max-width: 991px) {
    .registration-image {
        flex: 1 1 100%;
        height: 250px;
        min-height: 250px;
    }

    .registration-form-container {
        flex: 1 1 100%;
        padding: 40px 25px;
    }
}