/* Reset CSS: Please avoid making changes here unless you know what you're doing :) */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    width: 100%;
    height: 100%;
}

body {
    line-height: 1;
    font-family: Arial, sans-serif;
    background-color: #040218;
    display: flex;
    justify-content: center;   /* 水平方向中央揃え */
    align-items: flex-start;   /* 垂直方向上揃え */
    min-height: 100vh;
}

ol, ul {
    list-style: none;
}

img, video {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
}

#game-container {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    width: 100vw;
    height: 100vh;
    margin-top: 0;
}