:root { color-scheme: dark; font-family: system-ui, sans-serif; background: #0b1022; color: #eef1ff; }
* { box-sizing: border-box; }
body { margin: 0; background: radial-gradient(ellipse at 50% 30%, #24234a 0%, #0b1022 70%); min-height: 100svh; }
main { width: min(100% - 28px, 480px); margin: 0 auto; padding: 24px 0; }
header { text-align: center; margin-bottom: 20px; }
.eyebrow { color: #62e4db; font-size: 11px; letter-spacing: .3em; font-weight: 700; }
h1 { margin: 5px 0; font-size: clamp(30px, 7vw, 44px); letter-spacing: -.04em; }
header p:last-child { color: #a4abc5; font-size: 14px; }
.game { position: relative; border-radius: 22px; overflow: hidden; border: 1px solid #41446a; box-shadow: 0 24px 80px #0006; touch-action: none; }
canvas { display: block; width: 100%; height: auto; }
.hud { position: absolute; top: 18px; left: 18px; right: 18px; display: flex; justify-content: space-between; font-size: 12px; font-weight: 800; letter-spacing: .08em; }
.hud span { background: #10172ac9; padding: 9px 12px; border-radius: 9px; }
.hint { position: absolute; bottom: 16px; width: 100%; text-align: center; font-size: 12px; color: #d3d9ec; pointer-events: none; }
nav { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: 16px; }
nav p { font-size: 12px; color: #a4abc5; text-align: center; }
button { border: 1px solid #464f76; background: #202943; color: #fff; border-radius: 14px; width: 64px; height: 48px; font-size: 24px; cursor: pointer; touch-action: manipulation; }
button:hover { background: #334365; } button:focus-visible { outline: 3px solid #62e4db; outline-offset: 3px; }
footer { text-align: center; font-size: 11px; color: #7e88a9; line-height: 1.6; margin-top: 18px; }
.overlay { position: absolute; inset: 0; background: #0b1022df; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 24px; }
.overlay[hidden] { display: none; }
.overlay h2 { font-size: 30px; margin-bottom: 8px; }
.overlay p { color: #b8c4df; line-height: 1.8; white-space: pre-line; }
.overlay button { width: 160px; font-size: 18px; background: #28776f; }
@media (max-width: 520px) { main { padding-top: 12px; } header { margin-bottom: 12px; } }