:root {
  --bg: #050b16;
  --panel: rgba(13, 24, 38, 0.9);
  --panel-border: rgba(148, 163, 184, 0.22);
  --text: #ebf8ff;
  --accent: #5eead4;
  --accent-2: #7dd3fc;
  --danger: #f87171;
  --warning: #fbbf24;
  --shadow: rgba(0, 0, 0, 0.38);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  min-height: 100%;
}

body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px;
  background:
    radial-gradient(circle at top, rgba(96, 165, 250, 0.22), transparent 30%),
    linear-gradient(180deg, #07111d 0%, var(--bg) 100%);
  color: var(--text);
  font-family: "Segoe UI", Arial, Helvetica, sans-serif;
}

.game-shell {
  width: min(90vw, 880px);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 22px;
  box-shadow: 0 25px 60px var(--shadow);
  padding: 18px 18px 14px;
  backdrop-filter: blur(8px);
}

.hud {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  padding: 8px 10px 14px;
  font-size: 1.1rem;
  letter-spacing: 0.06em;
  font-weight: 700;
}

.label {
  color: var(--accent-2);
  margin-right: 10px;
}

#score,
#lives,
#coins {
  display: inline-block;
  min-width: 42px;
  color: var(--text);
}

.level-panel {
  display: grid;
  grid-template-columns: minmax(170px, 0.75fr) minmax(300px, 1.25fr);
  gap: 14px 22px;
  align-items: end;
  padding: 16px 10px 2px;
}

.section-label {
  display: block;
  margin-bottom: 7px;
  color: var(--accent-2);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

select {
  width: 100%;
  min-height: 43px;
  padding: 0 12px;
  border: 1px solid var(--panel-border);
  border-radius: 10px;
  color: var(--text);
  background: #101f32;
  font: inherit;
  cursor: pointer;
}

select:disabled {
  cursor: not-allowed;
  opacity: 0.65;
}

.shop {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 14px;
}

.shop-copy {
  display: block;
  color: rgba(235, 248, 255, 0.72);
  font-size: 0.85rem;
}

.shop-copy strong {
  color: var(--warning);
}

.shop button {
  flex: 0 0 auto;
  padding: 0.7rem 1rem;
  border-radius: 10px;
  color: #08151e;
  background: var(--warning);
  box-shadow: 0 6px 16px rgba(251, 191, 36, 0.2);
  font-size: 0.85rem;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
  transform: none;
}

.shop-status {
  grid-column: 1 / -1;
  min-height: 1.2em;
  margin: -3px 0 0;
  color: rgba(235, 248, 255, 0.62);
  font-size: 0.8rem;
}

canvas {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: linear-gradient(180deg, #0b1728 0%, #12263f 100%);
  box-shadow: inset 0 0 0 1px rgba(147, 197, 253, 0.14);
  touch-action: none;
}

.controls {
  display: flex;
  justify-content: center;
  margin-top: 14px;
}

button {
  border: none;
  border-radius: 999px;
  padding: 0.85rem 1.55rem;
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  color: #05151d;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  box-shadow: 0 8px 20px rgba(94, 234, 212, 0.26);
}

button:hover {
  transform: translateY(-1px);
}

button:active {
  transform: translateY(1px);
}

button:focus-visible {
  outline: 2px solid rgba(125, 211, 252, 0.85);
  outline-offset: 3px;
}

@media (max-width: 600px) {
  .level-panel {
    grid-template-columns: 1fr;
  }

  .shop-status {
    grid-column: auto;
  }
}