.logo {

    width: 260px;

    height: auto;

    margin-bottom: 30px;

}

body {

    margin: 0;

    min-height: 100vh;

    display: flex;

    justify-content: center;

    align-items: center;

    background: #eef3fb;

    font-family:
        "Yu Gothic",
        "Meiryo",
        sans-serif;

}

.loginContainer {

    width: 700px;

    background: #f8faff;

    padding: 60px;

    border-radius: 40px;

    box-shadow:
        0 10px 40px rgba(0, 0, 0, 0.05);

    text-align: center;

}

h1 {

    margin-top: 10px;

    margin-bottom: 50px;

    font-size: 48px;

    font-weight: 700;

    color: #5f8eff;

}

.form-group {

    text-align: left;

    margin-bottom: 30px;

}

label {

    display: block;

    margin-bottom: 12px;

    font-size: 22px;

    font-weight: 600;

    color: #6d7ba1;

}

input {

    width: 100%;

    box-sizing: border-box;

    padding: 20px;

    border-radius: 18px;

    border: 2px solid #d7e2ff;

    background: white;

    font-size: 22px;

    color: #2d3c6b;

    transition: 0.3s;

}

input::placeholder {

    color: #b8c2dd;

    opacity: 1;

}

input:focus {

    outline: none;

    border-color: #5f8eff;

    box-shadow:
        0 0 0 5px rgba(95, 142, 255, 0.15);

}

input:focus::placeholder {

    color: transparent;

}

#registerBtn {

    width: 100%;

    height: 80px;

    border: none;

    border-radius: 24px;

    margin-top: 20px;

    background:
        linear-gradient(90deg,
            #6ca8ff,
            #4f7cff);

    color: white;

    font-size: 30px;

    font-weight: bold;

    cursor: pointer;

    transition: 0.3s;

}

#registerBtn:hover {

    transform: translateY(-2px);

    box-shadow:
        0 10px 20px rgba(79, 124, 255, 0.25);

}

.backLink {

    display: inline-block;

    margin-top: 40px;

    font-size: 20px;

    font-weight: 700;

    color: #5f8eff;

    text-decoration: none;

    transition: 0.3s;

}

.backLink:hover {

    color: #4f7cff;

}

@media (max-width: 768px) {

    .loginContainer {

        width: calc(100% - 40px);

        padding: 40px 25px;

    }

    h1 {

        font-size: 38px;

    }

    .subTitle {

        font-size: 20px;

        margin-bottom: 40px;

    }

    label {

        font-size: 20px;

    }

    input {

        font-size: 20px;

    }

    #registerBtn {

        font-size: 26px;

    }

}