/* リセットと基本設定 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    user-select: none;
    -webkit-user-select: none;
}

body {
    background-color: #f7f1e3; /* 優しいパステル系の背景色 */
    font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow: hidden;
}

/* ゲームコンテナ：スマホの縦画面を想定 */
#game-container {
    width: 100%;
    max-width: 600px;
    height: calc(100vh - 60px);
    max-height: 1000px;
    margin: 30px auto;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

canvas {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
}