* {
    box-sizing: border-box;
}

body {
    margin: 0;

    font-family:
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        "Helvetica Neue",
        Arial,
        sans-serif;

    line-height: 1.8;

    background-color: #f5f6f8;
    color: #222222;
}


/* Header */

.site-header {
    background-color: #ffffff;
    border-bottom: 1px solid #dddddd;
}

.header-inner {
    max-width: 900px;
    margin: 0 auto;
    padding: 25px 20px;

    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav a {
    margin-left: 20px;

    color: #444444;
    text-decoration: none;
}

nav a:hover {
    text-decoration: underline;
}

.site-header h1 {
    margin: 0;
    font-size: 1.8rem;
}


/* Main */

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 60px 20px;
}


/* Welcome */

.welcome {
    margin-bottom: 60px;
}

.welcome h2 {
    font-size: 2rem;
    margin-bottom: 10px;
}

/*
.icon img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    border-radius: 10px;
}
*/


/* Update History */

.updates {
    padding: 30px;

    background-color: #ffffff;

    border-radius: 12px;

    box-shadow:
        0 2px 10px rgba(0, 0, 0, 0.06);
}

.updates h2 {
    margin-top: 0;

    padding-bottom: 10px;

    border-bottom: 1px solid #eeeeee;
}

.update-list {
    list-style: none;

    margin: 0;
    padding: 0;
}

.update-list li {
    display: flex;

    gap: 25px;

    padding: 12px 0;

    border-bottom: 1px solid #eeeeee;
}

.update-list li:last-child {
    border-bottom: none;
}

.update-list time {
    color: #777777;
    white-space: nowrap;
}


/* gallery*/
.gallery {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
}

.gallery img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    border-radius: 10px;
}


/* Footer */

footer {
    margin-top: 60px;

    padding: 25px;

    text-align: center;

    color: #888888;

    background-color: #ffffff;

    border-top: 1px solid #dddddd;
}


/* Smartphone */

@media (max-width: 600px) {

    .update-list li {
        flex-direction: column;
        gap: 3px;
    }
}