styles.css

/* CSS */
@charset "utf-8";

* {
    margin: 0;
    padding: 0;
    -webkit-text-size-adjust: 100%;
}

html {
    background: linear-gradient(to bottom, #005f80, #001d2e) !important;
    font-family: 'DM Mono', monospace; /* DM Mono フォントの適用 */
    font-size: 2vw; /* 画面の幅の2%に設定 */
    word-break: break-all;
    color: #333;
}

body {
    padding: 0;
    margin: 0;
    width: 100%;
    overflow: auto;
    overflow: -moz-scrollbars-vertical;
    line-height: 1.2;
    color: inherit;
}

header {
    background-color: #000000;
    text-align: center;
    height: 15vh;
    font-size: 100%;
    opacity: 0.5;
    text-shadow: 0 0 5px rgba(255, 255, 255, 0.8), 0 0 10px rgba(255, 255, 255, 0.8);
}

main {
    margin: 0 auto;
    font-size: 150%;
    width: 70vw;
    padding: 5vh 0;
}

footer {
    text-align: center;
    background-color: #000000;
    height: 15vh;
    font-size: 100%;
    opacity: 0.5;
    bottom: 0;
}

.button {
    position: fixed;
    width: 15vh;
    height: 15vh;
    background-color: #000000;
    opacity: 0.1;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
    cursor: pointer;
    z-index: 10;
}

.button:hover {
    opacity: 0.5;
}

/* 個別のスタイル */
.top_right {
    top: 0;
    right: 0;
    clip-path: polygon(100% 0, 100% 100%, 0 0);
}

.top_left {
    top: 0;
    left: 0;
    clip-path: polygon(0 0, 100% 0, 0 100%);
}

.bottom_left {
    bottom: 0;
    left: 0;
    clip-path: polygon(0 100%, 100% 100%, 0 0);
}

.bottom_right {
    bottom: 0;
    right: 0;
    clip-path: polygon(100% 100%, 0 100%, 100% 0);
}

.menu {
    display: none;
    position: fixed;
    top: 20%;
    left: 20%;
    width: 60%;
    background: rgba(0, 0, 0, 0.8);
    color: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.5);
    z-index: 5;
}

.menu p {
    margin-bottom: 10px;
}