#sendCodeBtn{
    color: #555555;
    cursor: pointer;
    user-select: none;
    background-color: transparent;
    border: none;
    padding: 5px;
    transition: background-color 0.3s ease;
    border-radius: 5px;
}
#sendCodeBtn:hover {
    color: #fc7044;
}
#sendCodeBtn:disabled {
    color: rgba(0,0,0,0.3);
    cursor: not-allowed;
}
.header-container {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 50px;
    position: relative;
}

.sendBtn:disabled {
    background-color: #cccccc;
    color: #666666;
    cursor: not-allowed;
    border: 1px solid #999999;
}

.back-link {
    position: absolute;
    left: 0;
    text-decoration: none;
    color: #555555;
}
.back-link:hover {
    color: #fc7044;
}

.header-container h2 {
    margin: 0;
}