html, body, main, div {
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
}

main {
    background-color: black;
    width: 100%;
    height: 100%;
    position: relative;
    overflow: hidden;
}

aside {
    border: 2px solid #eeeeee;
    width: 5em;
    height: 4em;
    position: absolute;
    border-bottom: none;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
}
aside::after {
    display: block;
    content: '';
    position: absolute;
    width: 56px;
    height: 58px;
    left: 11px;
    bottom: -30px;
    border: 2px solid #eeeeee;
    border-left: none;
    border-top: none;
    transform: rotate(45deg);
}
aside.hit {
    background-color: #fff;
}
aside.hit::after {
    background-color: #fff;
}

#ship {
    position: absolute;
    width: 0;
    height: 0;
    border-left: 20px solid transparent;
    border-right: 20px solid transparent;
    border-bottom: 50px solid white;
    box-shadow: 0 13px 6px -7px #ffbb66;
    z-index: 1;
}
#ship.crash {
    border-bottom-color: #ec8f39;
}

body{height:auto;min-height:100svh;background:#fff8ed;color:#244247;font-family:system-ui,sans-serif;padding:12px;box-sizing:border-box}.game-heading{max-width:760px;margin:0 auto 14px}.game-heading h1{margin:.4em 0}.game-heading p{line-height:1.5}main{max-width:760px;height:min(56svh,500px);min-height:300px;margin:auto;border:3px solid #2a8990;border-radius:18px;box-sizing:border-box;background:radial-gradient(ellipse at top,#18375b,#070d24)}button{font:inherit;font-weight:700;border:2px solid #17626a;border-radius:12px;padding:12px 16px;min-height:48px;color:#16444c;background:#dff8ec;cursor:pointer}button:focus-visible,main:focus-visible{outline:3px solid #c3466a;outline-offset:3px}button:disabled{opacity:.5}aside{top:-100px;animation-name:asteroid-drift;animation-iteration-count:1;animation-fill-mode:forwards;pointer-events:none}@keyframes asteroid-drift{from{top:-100px}to{top:calc(100% + 100px)}}.touch-controls{display:flex;justify-content:center;gap:8px;margin:14px auto;max-width:760px}.touch-controls button{touch-action:none;user-select:none;flex:1}.sound-note{text-align:center;font-size:14px}#status{font-weight:700;min-height:1.5em}