* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    background: #ffffff;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    color: #000000;
}

.menu-button {
    position: fixed;
    top: 20px;
    left: 20px;
    padding: 0;
    margin: 0;
    border: none;
    background: transparent;
    cursor: pointer;
    z-index: 10;
}

.menu-button img {
    display: block;
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.menu-panel {
    position: fixed;
    top: 72px;
    left: 20px;
    display: none;
    z-index: 9;
}

.menu-panel.open {
    display: block;
}

.menu-panel ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.menu-panel li {
    margin: 0;
    padding: 0;
}

.menu-panel a {
    display: block;
    color: #000000;
    text-decoration: none;
    font-size: 16px;
    padding: 4px 0;
}

main {
    max-width: 960px;
    margin: 0 auto;
    padding: 100px 20px 60px;
}

main img {
    display: block;
    width: 100%;
    height: auto;
}

main img:not(:first-child) {
    border-top: 1px solid #f0f0f0;
    margin-top: 40px;
    padding-top: 40px;
}