:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #090d14;
  color: #e9f3ff;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    radial-gradient(circle at 20% 10%, rgba(56, 189, 248, 0.16), transparent 28rem),
    radial-gradient(circle at 80% 0%, rgba(244, 114, 182, 0.12), transparent 30rem),
    linear-gradient(180deg, #090d14 0%, #111827 54%, #080b12 100%);
}

.shell {
  width: min(1180px, calc(100vw - 32px));
  min-height: 100vh;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 18px;
  align-items: center;
  padding: 24px 0;
}

.game-frame {
  position: relative;
  aspect-ratio: 4 / 3;
  width: 100%;
  min-width: 0;
  border: 1px solid rgba(148, 163, 184, 0.25);
  border-radius: 8px;
  overflow: hidden;
  background: #04070d;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.4);
}

canvas {
  display: block;
  width: 100%;
  height: 100%;
}

.hud {
  position: absolute;
  inset: 14px 14px auto 14px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  pointer-events: none;
}

.hud div,
.panel {
  border: 1px solid rgba(148, 163, 184, 0.22);
  background: rgba(9, 13, 20, 0.72);
  backdrop-filter: blur(10px);
}

.hud div {
  min-width: 0;
  border-radius: 8px;
  padding: 8px 10px;
}

.hud span {
  display: block;
  font-size: 11px;
  line-height: 1.1;
  color: #93a4b8;
  text-transform: uppercase;
}

.hud strong {
  display: block;
  margin-top: 2px;
  font-size: clamp(16px, 2vw, 24px);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 14px;
  padding: 24px;
  text-align: center;
  background: rgba(4, 7, 13, 0.58);
}

.overlay.hidden {
  display: none;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: clamp(42px, 9vw, 96px);
  line-height: 0.95;
  text-transform: uppercase;
}

.overlay p {
  color: #bdd3ef;
}

.score-form {
  width: min(340px, 100%);
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
}

.score-form.hidden {
  display: none;
}

.score-form label {
  font-size: 12px;
  color: #93a4b8;
  text-transform: uppercase;
}

.score-form input {
  width: 100%;
  border: 1px solid rgba(148, 163, 184, 0.34);
  border-radius: 8px;
  padding: 10px 12px;
  color: #e9f3ff;
  background: rgba(15, 23, 42, 0.9);
  font: 700 16px ui-monospace, SFMono-Regular, Consolas, monospace;
  text-align: center;
}

button {
  min-width: 140px;
  border: 0;
  border-radius: 8px;
  padding: 11px 18px;
  color: #07111d;
  background: #63e6be;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

button:hover {
  background: #8ff0d1;
}

.panel {
  border-radius: 8px;
  padding: 18px;
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
}

.panel h2 {
  font-size: 14px;
  color: #63e6be;
  text-transform: uppercase;
}

.panel p,
.panel li {
  color: #c6d3e2;
  line-height: 1.45;
}

.panel ul {
  margin: 0;
  padding-left: 18px;
}

.scores {
  max-height: 250px;
  margin: 0;
  padding-left: 24px;
  overflow: auto;
  color: #c6d3e2;
  font-size: 12px;
}

.scores li {
  margin-bottom: 7px;
}

.scores strong {
  display: block;
  color: #e9f3ff;
  font-size: 13px;
}

.scores span {
  display: block;
  color: #93a4b8;
  font-variant-numeric: tabular-nums;
}

kbd {
  display: inline-grid;
  min-width: 28px;
  height: 26px;
  place-items: center;
  margin-right: 5px;
  border: 1px solid rgba(148, 163, 184, 0.34);
  border-radius: 5px;
  background: rgba(15, 23, 42, 0.85);
  color: #f8fbff;
  font: 700 12px ui-monospace, SFMono-Regular, Consolas, monospace;
}

@media (max-width: 900px) {
  .shell {
    grid-template-columns: 1fr;
    align-content: center;
  }

  .panel {
    align-self: auto;
  }
}

@media (max-width: 560px) {
  .shell {
    width: min(100vw - 16px, 420px);
    padding: 8px 0 16px;
    gap: 10px;
  }

  .hud {
    inset: 8px 8px auto 8px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hud div {
    padding: 6px 8px;
  }

  .panel {
    padding: 14px;
  }
}