:root {
  --bg: #121212;
  --panel: #1f1f1f;
  --text: #f7f7f7;
  --accent: #ffcc00;
  --accent-2: #ff5a36;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: radial-gradient(circle at top, #202020 0%, #0a0a0a 70%);
  color: var(--text);
  font-family: Verdana, Geneva, Tahoma, sans-serif;
}

.app {
  width: min(94vw, 640px);
  padding: 16px;
  background: linear-gradient(180deg, #232323 0%, #171717 100%);
  border: 1px solid #333;
  border-radius: 12px;
  box-shadow: 0 12px 28px rgb(0 0 0 / 45%);
}

.hud {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.hud h1 {
  margin: 0;
  font-size: 1.2rem;
  color: var(--accent);
}

.stats {
  display: flex;
  gap: 14px;
  font-size: 0.95rem;
}

canvas {
  width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid #363636;
  background: #080808;
  display: block;
}

.controls {
  margin-top: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.controls p {
  margin: 0;
  font-size: 0.9rem;
  color: #ddd;
}

button {
  border: 0;
  border-radius: 8px;
  background: var(--accent-2);
  color: white;
  font-weight: 700;
  cursor: pointer;
  padding: 10px 14px;
}

button:hover { filter: brightness(1.1); }

.coupon {
  margin-top: 12px;
  padding: 12px;
  border: 1px dashed var(--accent);
  border-radius: 10px;
  background: #15120a;
}

.coupon h2 {
  margin: 0 0 8px;
  color: var(--accent);
  font-size: 1rem;
}

.coupon p {
  margin: 0 0 6px;
}

.coupon code {
  font-size: 1.1rem;
  letter-spacing: 1px;
  color: #ffe37e;
  font-weight: 700;
}

.hidden { display: none; }