.login {
    font-family: "Open Sans", "Zen Kaku Gothic New", "ヒラギノ角ゴ ProN W3", "Hiragino Kaku Gothic ProN", "游ゴシック", "Yu Gothic", "YuGothic", "メイリオ", Meiryo, sans-serif;
    background-color: #fff;
    text-align: center;
    margin: 50px auto 50px;
    width: 90%;            
    max-width: 350px;      
}

h1 {
    width: 120px;
    margin-bottom: 30px;
    background-color: #000;
    color: #fff;
    margin: 0 auto;

    display: flex;
    justify-content: center;
    align-items: center;

    font-weight: 200;
    letter-spacing: 0.15em;
    font-size: 24px;

}

h2 {
    font-weight: 500;
    letter-spacing: 0.1em;
    font-size: 14px;
    margin: 6px auto 50px;
}

h3 {
    font-weight: 600;
    width: 100%;
    height: 30px;
    letter-spacing: 0.1em;
    border-bottom:  1px solid #000 ;
    font-size: 16px;
    margin: 6px auto 20px;
    padding: auto 30px;
    text-align: left;
}

p {
    text-align: left;
    padding: 0;
    margin: 3px auto;

    font-weight: 600;
    letter-spacing: 0.1em;
    font-size: 12px;
}

.label-required::after {
    content: " *";        
    font-size: 0.8em;     
    vertical-align: bottom;
}

.input-field {
    width: 100%;           
    height: 32px;
    box-sizing: border-box; 
    margin: 0 auto 20px;
    border: 1px solid #aaa; 
    border-radius: 3px;
}

.login-btn {
    width: 240px;           
    height: 48px;          
    background-color: #fff;
    border: 1px solid #333;
    position: relative;    

    color: #333;           
    font-size: 12px;       
    font-weight: 300;      
    cursor: pointer;       

    display: flex;
    justify-content: center; 
    align-items: center;     
    margin: 20px auto;       

    /* aタグをボタン化するための設定  */
    text-decoration: none;
    color: #333;          
    box-sizing: border-box;
}

/* 右側の矢印（>）を作る */
.login-btn::after {
    content: '';            
    position: absolute;
    right: 20px;            
    width: 7px;             
    height: 7px;            

    border-top: 1px solid #333;
    border-right: 1px solid #333;

    transform: rotate(45deg);
}

.login-btn:hover::after {
    border-top: 1px solid cyan;
    border-right: 1px solid cyan;
    transition: 0.3s;
}

.login-btn:hover {
    color: cyan;
    border: 1px solid cyan;
    transition: 0.3s;          /* ゆっくり色を変える */
}

.password-group {
    position: relative;
    width: 100%; 
}

.eye-icon {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-85%);
    cursor: pointer;
    user-select: none;

    font-variation-settings: 'wght' 200; 
    color: #999;                         
    font-size: 16px;
}

.input-box {
    width: 300px;
    margin: 0 auto;
    background-color: #f5f5f5;
    padding: 30px;
}

form {
    margin-bottom: 30px;
}