#form_send_code {
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
    padding: 40px;
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

#form_send_code h1 {
    color: #1F2937;
    font-size: 25px;
    font-weight: 600;
    margin-bottom: 32px;
    text-align: center;
}

#form_send_code input[type="radio"] {
    position: absolute;
    opacity: 0;
}

#form_send_code .choose_option {
    display: block;
    padding: 14px 16px;
    border: 1px solid #E5E7EB;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    margin-bottom: 12px;
    background-color: white;
    color: #1F2937;
    text-transform: uppercase;
}

#form_send_code input[type="radio"]:checked + .choose_option {
    border-color: #4F46E5;
    background-color: rgba(79, 70, 229, 0.05);
    color: #4F46E5;
    transform: translateY(-2px);
    width: 100% !important;
    padding: 16px 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    box-sizing: border-box;
    margin-left: 0;
    box-shadow: 0 4px 6px rgba(79, 70, 229, 0.1);
    transition: all 0.3s ease;
}
#form_send_code input[type="radio"]:checked + .choose_option::after {
    content: '✓';
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: #4F46E5;
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background-color: rgba(79, 70, 229, 0.1);
    border-radius: 50%;
    line-height: 24px;
}
#form_send_code .choose_option {
    width: 100%;
    box-sizing: border-box;
    text-align: center;
    min-height: 52px;
}

#form_send_code .choose_option:hover {
    border-color: #4F46E5;
    color: #4F46E5;
}

#form_send_code .send_input {
    margin-top: 24px;
    animation: fadeIn 0.3s ease-out;
}

#form_send_code hr {
    border: none;
    border-top: 1px solid #E5E7EB;
    margin: 20px 0;
}

#form_send_code .btn-save {
    width: 100%;
    padding: 12px;
    background-color: #4F46E5;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s;
}

#form_send_code .btn-save:hover {
    background-color: #4338CA;
}

#form_send_code .btn-save i {
    margin-right: 8px;
}

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

@media (max-width: 576px) {
    #form_send_code {
        padding: 30px 20px;
    }

    #form_send_code h1 {
        font-size: 22px;
    }
}