:root {
  color-scheme: dark;
  --bg: #101419;
  --panel: #171d23;
  --panel-strong: #202832;
  --line: #34414c;
  --text: #eef5f2;
  --muted: #aab8b2;
  --accent: #58c9a2;
  --gold: #f1c75b;
  --coral: #f06f66;
  --blue: #55c7ec;
  --shadow: rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(180deg, rgba(39, 48, 56, 0.72), rgba(16, 20, 25, 0.92)),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button,
canvas {
  font: inherit;
}

.shell {
  width: min(1220px, calc(100vw - 28px));
  margin: 0 auto;
  padding: 18px 0 24px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

.eyebrow,
.label {
  margin: 0 0 5px;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 4.8vw, 4rem);
  line-height: 0.95;
  letter-spacing: 0;
}

#restartButton {
  border: 1px solid rgba(88, 201, 162, 0.72);
  border-radius: 8px;
  background: #20362f;
  color: var(--text);
  cursor: pointer;
  font-weight: 800;
  padding: 11px 17px;
  box-shadow: 0 10px 24px var(--shadow);
}

#restartButton:hover,
#restartButton:focus-visible {
  background: #285142;
  outline: 2px solid rgba(88, 201, 162, 0.45);
  outline-offset: 2px;
}

.layout {
  display: grid;
  grid-template-columns: minmax(260px, 330px) minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.panel,
.stage {
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  background: rgba(23, 29, 35, 0.92);
  box-shadow: 0 16px 34px var(--shadow);
}

.panel {
  padding: 14px;
}

.objective,
.readout {
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  background: rgba(32, 40, 50, 0.78);
  padding: 12px;
}

.objective p,
.readout p {
  margin: 0;
  color: var(--muted);
  font-size: 0.96rem;
  line-height: 1.45;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin: 10px 0;
}

.stat {
  min-width: 0;
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 8px;
  background: #11171d;
  padding: 10px;
}

.stat span {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.2;
}

.stat strong {
  display: block;
  margin-top: 4px;
  color: var(--text);
  font-size: clamp(1rem, 1.6vw, 1.16rem);
  line-height: 1.15;
  overflow-wrap: anywhere;
}

.stage {
  padding: 10px;
}

#gameCanvas {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 90 / 62;
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: 6px;
  background: #0d1318;
  touch-action: none;
}

#gameCanvas:focus-visible {
  outline: 2px solid rgba(88, 201, 162, 0.7);
  outline-offset: 3px;
}

@media (max-width: 840px) {
  .shell {
    width: min(100vw - 18px, 760px);
    padding-top: 10px;
  }

  .layout {
    grid-template-columns: 1fr;
  }

  .topbar {
    align-items: flex-end;
  }

  h1 {
    font-size: clamp(2.1rem, 12vw, 3.4rem);
  }
}

@media (max-width: 520px) {
  .topbar {
    gap: 10px;
  }

  #restartButton {
    padding: 10px 12px;
  }

  .stat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .panel {
    padding: 10px;
  }

  .stage {
    padding: 6px;
  }
}