:root {
  color-scheme: dark;
  --bg: #101319;
  --panel: #171c24;
  --panel-strong: #202734;
  --ink: #f0f5ee;
  --muted: #a7b4b0;
  --line: #303946;
  --accent: #49c6a0;
  --accent-2: #f0bc57;
  --danger: #ff6f7b;
  --cool: #72a7ff;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 18% 12%, rgba(73, 198, 160, 0.12), transparent 28rem),
    linear-gradient(145deg, #0e1117 0%, #121720 52%, #17171d 100%);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

button {
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background: #222a36;
  color: var(--ink);
  cursor: pointer;
  font: inherit;
  font-weight: 700;
  min-height: 2.65rem;
  padding: 0.65rem 0.85rem;
  transition: border-color 120ms ease, background 120ms ease, transform 120ms ease;
}

button:hover:not(:disabled),
button:focus-visible {
  background: #2a3443;
  border-color: var(--accent);
  outline: none;
}

button:active:not(:disabled) {
  transform: translateY(1px);
}

button:disabled {
  color: #737e87;
  cursor: not-allowed;
  opacity: 0.72;
}

.shell {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin: 0 auto;
  max-width: 1280px;
  min-height: 100vh;
  padding: clamp(0.75rem, 2vw, 1.5rem);
}

.topbar {
  align-items: start;
  display: flex;
  gap: 1rem;
  justify-content: space-between;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  font-size: clamp(1.8rem, 4vw, 3.2rem);
  line-height: 1;
}

h2 {
  font-size: 1.15rem;
}

h3 {
  color: var(--accent-2);
  font-size: 0.92rem;
  letter-spacing: 0;
  text-transform: uppercase;
}

.objective {
  color: var(--muted);
  line-height: 1.45;
  margin-top: 0.5rem;
  max-width: 70rem;
}

.restart,
.surge {
  background: linear-gradient(180deg, #2b6255, #1d4f45);
  border-color: rgba(73, 198, 160, 0.45);
  color: #f7fffb;
  flex: 0 0 auto;
}

.surge {
  background: linear-gradient(180deg, #7a5222, #5b3d19);
  border-color: rgba(240, 188, 87, 0.48);
}

.stats {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.stat {
  background: rgba(23, 28, 36, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  padding: 0.85rem 0.95rem;
}

.stat span {
  color: var(--muted);
  display: block;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.stat strong {
  display: block;
  font-size: clamp(1.15rem, 2vw, 1.55rem);
  margin-top: 0.2rem;
}

.game-layout {
  display: grid;
  flex: 1;
  gap: 1rem;
  grid-template-columns: minmax(0, 1fr) 23rem;
  min-height: 0;
}

.canvas-wrap {
  background: #0f1319;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  min-height: 28rem;
  overflow: hidden;
  position: relative;
}

canvas {
  display: block;
  height: 100%;
  min-height: 28rem;
  width: 100%;
}

.state-banner {
  align-items: center;
  background: rgba(11, 14, 18, 0.82);
  display: flex;
  font-size: clamp(1.4rem, 4vw, 3.1rem);
  font-weight: 900;
  inset: 0;
  justify-content: center;
  padding: 2rem;
  position: absolute;
  text-align: center;
}

.panel {
  align-self: stretch;
  background: rgba(23, 28, 36, 0.94);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  min-height: 0;
  padding: 1rem;
}

.panel-head {
  align-items: center;
  display: flex;
  gap: 1rem;
  justify-content: space-between;
}

#focusHint,
.keys,
.log-line,
.lane-meta,
.upgrade-box p {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.35;
}

.lane-controls {
  display: grid;
  gap: 0.75rem;
  overflow: auto;
  padding-right: 0.15rem;
}

.lane-row {
  background: var(--panel-strong);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  padding: 0.75rem;
}

.lane-row.focused {
  border-color: rgba(73, 198, 160, 0.8);
  box-shadow: inset 0 0 0 1px rgba(73, 198, 160, 0.24);
}

.lane-title {
  align-items: baseline;
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.55rem;
}

.lane-title strong {
  font-size: 0.98rem;
}

.lane-meter {
  background: #111821;
  border-radius: 999px;
  height: 0.48rem;
  margin-bottom: 0.65rem;
  overflow: hidden;
}

.lane-meter span {
  background: linear-gradient(90deg, var(--danger), var(--accent-2), var(--accent));
  display: block;
  height: 100%;
  transition: width 140ms ease;
}

.lane-actions {
  display: grid;
  gap: 0.45rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.lane-actions button {
  font-size: 0.8rem;
  min-height: 2.4rem;
  padding: 0.5rem 0.35rem;
}

.upgrade-box {
  background: #151a22;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  display: grid;
  gap: 0.65rem;
  padding: 0.8rem;
}

.keys {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 0.8rem;
}

.log-line {
  background: #11161d;
  border-left: 3px solid var(--accent);
  border-radius: 4px;
  margin-top: auto;
  padding: 0.7rem 0.75rem;
}

@media (max-width: 980px) {
  .game-layout {
    grid-template-columns: 1fr;
  }

  .panel {
    max-height: none;
  }
}

@media (max-width: 680px) {
  .topbar {
    flex-direction: column;
  }

  .restart {
    width: 100%;
  }

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

  .canvas-wrap,
  canvas {
    min-height: 24rem;
  }

  .lane-actions {
    grid-template-columns: 1fr;
  }
}