/* 基本設定 */
body {
    font-family: sans-serif;
    margin: 0;
    color: #333;
/*
    line-height: 1.6;
*/
    background-image:url(../bgillust.jpg);
    background-size:contain;
}
/*
header { background: #fff; padding: 1rem; border-bottom: 2px solid #00a0e9; display: flex; justify-content: space-between; align-items: center; }
*/
header {
    padding: 1rem;
/*
    border-bottom: 2px solid #00a0e9;
*/
    display: flex;
    justify-content: space-between;
    align-items: center;
}
ul {
    display: flex;
    list-style: none;
    gap: 15px;
}
li {
    border: 2px solid rgb(0, 160, 233);
    padding: 5px;
    border-radius: 5px;
    text-align: center;
    background:#fff;
    opacity: 0.7;
}

.hed {
    font-weight: 700;
    color:#fff;
    text-shadow:0 0 5px #fff,
                0 0 15px rgb(255, 0, 0),
                0 0 15px #f03,
                0 0 15px #f03,
                0 0 15px #f03;
    padding:10px;
    border-radius:10px;
    background:rgba(0, 132, 255, 0.2);
}
.hed sup {
    font-size: 90%;
}
.hed span {
    font-size: 220%;
    letter-spacing:0.5em;
}

/* スマホ対応の肝：グリッド設定 */
.course-grid {
    display: grid;
    grid-template-columns: 1fr; /* デフォルトは1列（スマホ用） */
    gap: 10px;
    padding: 10px;
}

.comment {
    font-size:80%;
}

/* PC向けの表示調整（画面幅が768px以上の場合） */
@media (min-width: 768px) {
    .course-grid {
        grid-template-columns: repeat(3, 1fr); /* 3列に横並び */
    }
}

.card {
    font-size:85%;
    font-weight: 800;
    border: 2px solid rgb(200, 100, 200);
    padding: 10px;
    border-radius: 10px;
    text-align: center;
    background:#fff;
    opacity: 0.7;
}
.btn { background: #ff6f61; color: #fff; text-decoration: none; padding: 10px 20px; border-radius: 5px; }