.arena { border-radius: 16px; min-height: 320px; display: grid; place-items: center; text-align: center; padding: 20px; user-select: none; -webkit-user-select: none; touch-action: manipulation; cursor: pointer; border: 1.5px solid var(--ink); }
.arena.wait { background: var(--ink); color: var(--paper); }
.arena.go { background: var(--yellow); color: #1c1b1a; }
.arena.early { background: var(--stamp); color: #fff; }
.arena .big { font-family: "Black Han Sans", sans-serif; font-size: 34px; }
.grid { display: grid; gap: 6px; margin: 0 auto; max-width: 420px; }
.grid button { aspect-ratio: 1; border: 0; border-radius: 10px; padding: 0; cursor: pointer; }
.simon { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; max-width: 360px; margin: 0 auto; }
.simon button { aspect-ratio: 1; border: 1.5px solid var(--ink); border-radius: 14px; background: var(--paper); cursor: pointer; transition: background .08s; }
.simon button.lit { background: var(--yellow); }
.simon button.bad { background: var(--stamp); }
.hud { display: flex; justify-content: space-between; font-size: 14px; color: var(--ink-2); margin: 8px 0; }
.scoreboard { font-family: "Black Han Sans", sans-serif; font-size: 56px; line-height: 1; text-align: center; margin: 10px 0; }