@charset "UTF-8";

*, *::before, *::after {
    box-sizing: border-box;
}

.section {
    margin: auto 40px 0;
    width:40vw;
}

.grid {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
    align-items: stretch; /* アイテムの高さを揃える */
}

.grid_item {
    flex: 1 1 calc(33.333% - 40px);
    max-width: calc(33.333% - 40px);
    display: flex; /* グリッドアイテムをFlexコンテナにする */
    flex-direction: column;
}

@media (max-width: 768px) {
    .section {
        margin: 10px 0;
    }

    .grid_item {
        flex: 1 1 100%;
        max-width: 100%;
    }
}

.card {
    display: flex;
    flex-direction: column;
    flex-grow: 1; /* カードが親の高さを埋める */
    text-decoration: none;
    color: inherit;
    background: #fafafa;
    border: 1px solid #ddd;
    border-radius: 10px;
    overflow: hidden;
    transition: box-shadow 0.3s;
}

.card:hover {
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.2);
}

.card_body {
    padding: 20px;
    flex-grow: 1; /* カードボディが余白を埋める */
}

.card_title {
    font-size: 1.4em;
    margin: 0 0 10px;
}

.card_text {
    margin: 0 0 10px;
    font-size:1.2em;
    line-height:1.8;    
}
@media (max-width: 768px) {
.card_text {
    margin: 0 0 10px;
    font-size:0.8em;
    line-height:1.8;    
}
}

.card_btn {
    padding: 10px;
    background: #2f4f4f;
    color: #fff;
    text-align: center;
    border-radius: 5px;
    cursor: pointer;
}

.card_btn:hover {
    background: #3cb371;
}