:root {
  --bg: #07111f;
  --panel: rgba(8, 20, 34, 0.9);
  --panel-strong: rgba(6, 15, 26, 0.96);
  --line: rgba(89, 255, 208, 0.24);
  --text: #eaffff;
  --muted: #89cfc4;
  --hot: #38f7d8;
  --hot-2: #10b9ff;
  --accent: #ffcf5a;
  --danger: #ff5d8f;
  --shadow: 0 0 24px rgba(56, 247, 216, 0.18);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top, rgba(16, 185, 255, 0.18), transparent 38%),
    radial-gradient(circle at bottom, rgba(56, 247, 216, 0.12), transparent 36%),
    linear-gradient(180deg, #08111e 0%, #04080f 100%);
  color: var(--text);
  font-family: "Trebuchet MS", "Lucida Console", monospace;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}

.app {
  width: min(1120px, 100%);
  display: grid;
  grid-template-columns: minmax(280px, 360px) minmax(0, 1fr);
  gap: 20px;
}

.hud-panel,
.arena-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.hud-panel {
  padding: 26px 22px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.kicker,
.overlay-label,
.stat-label {
  text-transform: uppercase;
  letter-spacing: 0.24em;
  font-size: 0.72rem;
  color: var(--muted);
  margin: 0;
}

h1,
h2,
.action-button,
.stat-card strong,
.meta-pill {
  font-family: "Courier New", monospace;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

h1 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  line-height: 1.05;
}

.tagline,
.message,
#overlayText {
  margin: 0;
  color: #cce8e2;
  line-height: 1.5;
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.stat-card {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 18px;
  padding: 14px 12px;
}

.stat-card strong {
  margin-top: 8px;
  display: block;
  font-size: clamp(1.25rem, 4vw, 1.9rem);
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.meta-pill {
  background: rgba(16, 185, 255, 0.11);
  color: #dffbff;
  border: 1px solid rgba(16, 185, 255, 0.2);
  border-radius: 999px;
  padding: 10px 14px;
  font-size: 0.8rem;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.action-button {
  appearance: none;
  border: 0;
  cursor: pointer;
  border-radius: 14px;
  padding: 14px 18px;
  font-size: 0.95rem;
  color: #05121d;
  transition: transform 120ms ease, box-shadow 120ms ease, opacity 120ms ease;
}

.action-button:hover,
.action-button:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 0 20px rgba(56, 247, 216, 0.28);
}

.action-button:active {
  transform: translateY(1px) scale(0.99);
}

.primary {
  background: linear-gradient(135deg, var(--hot), #7bff9f);
}

.secondary {
  background: linear-gradient(135deg, #ffc857, #ff7c7c);
}

.message {
  min-height: 48px;
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.arena-panel {
  padding: 14px;
}

.arena {
  position: relative;
  min-height: 540px;
  overflow: hidden;
  border-radius: 20px;
  background:
    linear-gradient(180deg, rgba(8, 17, 30, 0.72), rgba(4, 8, 15, 0.96)),
    linear-gradient(90deg, rgba(56, 247, 216, 0.08), transparent 25%, transparent 75%, rgba(16, 185, 255, 0.08));
  border: 1px solid rgba(56, 247, 216, 0.15);
}

.arena::before,
.arena::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.arena::before {
  background-image:
    linear-gradient(rgba(56, 247, 216, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 247, 216, 0.08) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.25;
}

.arena::after {
  background: radial-gradient(circle at center, transparent 40%, rgba(0, 0, 0, 0.45) 100%);
}

.scanlines {
  position: absolute;
  inset: 0;
  background: linear-gradient(transparent 0%, rgba(255, 255, 255, 0.05) 50%, transparent 100%);
  background-size: 100% 7px;
  mix-blend-mode: screen;
  opacity: 0.08;
  pointer-events: none;
}

.overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(5, 10, 18, 0.42);
  transition: opacity 180ms ease;
}

.overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.overlay-card {
  width: min(420px, 100%);
  background: var(--panel-strong);
  border: 1px solid rgba(56, 247, 216, 0.18);
  border-radius: 20px;
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow);
}

.coin {
  position: absolute;
  appearance: none;
  border: 0;
  background: none;
  cursor: pointer;
  width: 92px;
  height: 92px;
  transform: translate(-50%, -50%);
  touch-action: manipulation;
}

.coin.hidden {
  opacity: 0;
  pointer-events: none;
}

.coin-core,
.coin-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
}

.coin-core {
  display: grid;
  place-items: center;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #041118;
  background:
    radial-gradient(circle at 30% 30%, #fff7a4 0%, #ffd35b 45%, #ff8d32 100%);
  box-shadow:
    0 0 0 4px rgba(255, 205, 90, 0.18),
    0 0 28px rgba(255, 205, 90, 0.65),
    inset 0 -8px 18px rgba(125, 63, 0, 0.35);
  animation: pulse 720ms ease-in-out infinite;
}

.coin-ring {
  border: 2px solid rgba(56, 247, 216, 0.45);
}

.coin-ring-a {
  animation: ripple 1.2s linear infinite;
}

.coin-ring-b {
  animation: ripple 1.2s linear 0.4s infinite;
}

.coin.hit .coin-core {
  animation: hitFlash 180ms ease;
}

.coin.miss .coin-core {
  animation: missFlash 220ms ease;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.08);
  }
}

@keyframes ripple {
  0% {
    transform: scale(0.92);
    opacity: 0.9;
  }
  100% {
    transform: scale(1.45);
    opacity: 0;
  }
}

@keyframes hitFlash {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.16);
  }
  100% {
    transform: scale(0.98);
  }
}

@keyframes missFlash {
  0% {
    filter: grayscale(0);
    opacity: 1;
  }
  100% {
    filter: grayscale(1);
    opacity: 0.2;
  }
}

@media (max-width: 900px) {
  body {
    padding: 14px;
  }

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

  .arena {
    min-height: 420px;
  }
}

@media (max-width: 560px) {
  .hud-panel,
  .arena-panel {
    border-radius: 20px;
  }

  .hud-panel {
    padding: 20px 16px;
  }

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

  .stat-card:last-child {
    grid-column: span 2;
  }

  .arena {
    min-height: 360px;
  }

  .coin {
    width: 82px;
    height: 82px;
  }
}