@charset "UTF-8";
/* CSS Document */

main h1{
    font-size: 2rem;
    text-align: center;
}
main h1 img{
    height: 3.125rem;
}


.history{
    width: 980px;
    position: relative;
    margin-top: 10rem;
    margin-bottom: 10rem;
    margin-left: auto;
    margin-right: auto;
    text-align: left
}

.history::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 12.5rem; /* 年のセルの右端に合わせる */
    width: 0.4rem;
    background-color: #3399CC;
    z-index: 0;
}

.his-year{
    position: relative;
    color: #3399CC;
    font-weight: bold;
    font-size: 2rem;
    letter-spacing: 0.5rem;
    width: 15%;
    height: 5rem;
    padding: 0 3rem;
    text-align: right;
}

.his-year::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 12.5rem;
    transform: translate(-50%, -50%);
    width: 1.5rem;
    height: 1.5rem;
    background-color: #3399CC;
    border: 3px solid #3399CC;
    border-radius: 50%;
    z-index: 1;
}

.his-month{
    width: 15%;
    padding: 0 0.5rem;
    text-align: center;
    color: #3399CC;
    font-weight: bold;
    font-size: 1.25rem;
}


.his-content{
    color: #333;
    font-size: 1rem;
    line-height: 1.6;
}