.nickname_container{
    display: flex;
    justify-content: space-between;
    margin-top: 50px;
}

.nickname_container_left{
    width: 60%;
}

.nickname_container_right{
    width: 35%;
}

.nickname_text{
    padding: 30px;
    color: #314631;
    line-height: 1.27;
    font-size: 20px;
    font-weight: bold;
    text-align: center;
    letter-spacing: 2px;
    border: 3px solid #314631;
}

.nickname_sign_up,
.nickname_sign_in{
    min-height: 450px;
    font-size: 1.1em;
    margin-top: 30px;
    text-align: center;
    border: 3px solid #314631;
    padding: 30px;
}

.c-form-text {
    height: 3.4em;
    width: 80%;
    margin-top: 30px;
    padding: 0 16px;
    border-radius: 4px;
    border: none;
    box-shadow: 0 0 0 1px #ccc inset;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;

}

.c-form-text:focus {
    outline: 0;
    box-shadow: 0 0 0 2px #314631 inset;
}

.btn {
    margin-top: 30px;
    font-size: 1.3rem;
    font-weight: 700;
    line-height: 1.5;
    position: relative;
    display: inline-block;
    padding: 1rem 4rem;
    cursor: pointer;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-transition: all 0.3s;
    transition: all 0.3s;
    text-align: center;
    vertical-align: middle;
    text-decoration: none;
    letter-spacing: 0.1em;
    color: #212529;
    border-radius: 0.5rem;
}
.mypage_btn{
    width: 100%;
    background-color: #293377!important;
}

.btn--black,
a.btn--black {
    font-size: 20px;
    color: #fff;
    background-color: #1a1919;
}

.btn--black:hover,
a.btn--black:hover {
    color: #fff;
    background: #1a1919;
}

.nickname_container_left>div>p:nth-child(1){
    padding: 10px;
}

.nickname_container_right>div>p{
    padding: 10px;
    background: #314631;
    color: yellow;
}

.nickname_container_left>div>p:nth-child(3),
.nickname_container_left>div>p:nth-child(4)
{
    margin-top: 30px;
    line-height: 30px;
}
.nickname_container_left>div>p:nth-child(4){
    color: red;
}

@media (max-width: 767px) {
    .btn--black,
    a.btn--black {
        font-size: 20px;
    }
    .nickname_container{
        display: block;
    }

    .nickname_container_left,
    .nickname_container_right{
        width: 100%;
    }

    .nickname_container_right{
        margin-top: 80px;
    }

    .nickname_container_right>div>p {
        font-size: 1.3em;
        padding: 20px;
    }
    .nickname_sign_up,
    .nickname_sign_in {
        min-height: 350px;
    }
}

@media screen and (max-width: 414px) {
    .btn--black,
    a.btn--black{
        font-size: 14px;
    }
}