:root {
  --bg-1: #050914;
  --bg-2: #0f203a;
  --accent: #38f9a5;
  --accent-2: #ff8bd1;
  --accent-3: #4df3ff;
  --text: #e6f1ff;
  --muted: #9bb0c9;
  --border: rgba(255, 255, 255, 0.1);
  --shadow: 0 18px 48px rgba(0, 0, 0, 0.55);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Space Grotesk", system-ui, sans-serif;
  background: radial-gradient(circle at 20% 15%, rgba(77, 243, 255, 0.12), transparent 36%),
    radial-gradient(circle at 82% 8%, rgba(255, 139, 209, 0.12), transparent 34%),
    linear-gradient(135deg, var(--bg-1), var(--bg-2));
  color: var(--text);
  overflow: hidden;
}

.grid-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 70px 70px;
  mix-blend-mode: screen;
}

.layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 18px 18px;
  display: grid;
  gap: 16px;
}

.hud {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.eyebrow {
  letter-spacing: 0.28em;
  text-transform: uppercase;
  font-size: 12px;
  color: var(--accent-2);
  margin: 0 0 6px;
}

h1 {
  margin: 0;
  font-size: clamp(28px, 4vw, 40px);
}

.lede {
  margin: 6px 0 0;
  color: var(--muted);
}

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

.btn {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  padding: 12px 16px;
  border-radius: 12px;
  font-weight: 700;
  cursor: pointer;
  letter-spacing: 0.01em;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn.primary {
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  color: #06101f;
  box-shadow: 0 12px 30px rgba(77, 243, 255, 0.35);
}

.btn.ghost {
  backdrop-filter: blur(10px);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.canvas-wrap {
  position: relative;
  border: 1px solid var(--border);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--shadow);
  background: radial-gradient(circle at 50% 50%, rgba(77, 243, 255, 0.08), rgba(15, 32, 58, 0.92));
}

canvas {
  display: block;
  width: 100%;
  height: 640px;
  background: transparent;
}

.scoreboard {
  position: absolute;
  top: 12px;
  left: 12px;
  display: grid;
  grid-template-columns: repeat(2, auto);
  gap: 8px;
  background: rgba(0, 0, 0, 0.45);
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
}

.score {
  display: flex;
  align-items: center;
  gap: 10px;
}

.label {
  font-size: 12px;
  color: var(--muted);
}

.value {
  font-family: "Press Start 2P", monospace;
  font-size: 18px;
  color: var(--accent);
}

.hint {
  position: absolute;
  bottom: 12px;
  right: 14px;
  background: rgba(0, 0, 0, 0.45);
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 12px;
}

.foot {
  display: flex;
  justify-content: center;
  padding: 12px 0 28px;
}

@media (max-width: 720px) {
  .hud {
    flex-direction: column;
    align-items: flex-start;
  }

  canvas {
    height: 500px;
  }
}