:root {
  --bg: #0b0f1c;
  --panel: #141a2e;
  --accent: #ffd23f;
  --text: #e8ecf8;
  --muted: #8b94b5;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  padding: 1rem;
  background: radial-gradient(1200px 600px at 50% -10%, #1b2340 0%, var(--bg) 60%);
  color: var(--text);
  font-family: "Segoe UI", system-ui, sans-serif;
  text-align: center;
  overscroll-behavior: none;
  -webkit-user-select: none;
  user-select: none;
}

main { display: flex; flex-direction: column; align-items: center; gap: 1.25rem; }

h1 {
  font-size: clamp(2.4rem, 8vw, 5.5rem);
  font-weight: 900;
  letter-spacing: 0.04em;
  line-height: 1.05;
  background: linear-gradient(180deg, #fff 10%, var(--accent) 55%, #e8842c 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 8px 32px rgba(255, 210, 63, 0.25);
}

.tagline { color: var(--muted); font-size: 1.05rem; max-width: 34rem; }

.game-wrap {
  width: min(800px, 100%);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(255, 255, 255, 0.07);
  background: var(--panel);
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  touch-action: none;
  -webkit-tap-highlight-color: transparent;
  -webkit-touch-callout: none;
  user-select: none;
}

/* Mobil: tam genişlik, sıkı yerleşim */
@media (max-width: 640px) {
  body { padding: 0.5rem; gap: 0.7rem; justify-content: flex-start; }
  h1 { margin-top: 0.5rem; }
  .tagline { font-size: 0.95rem; }
  .controls { font-size: 0.85rem; }
  .game-wrap { border-radius: 10px; }
}

.controls { color: var(--muted); font-size: 0.95rem; }
kbd {
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-bottom-width: 3px;
  border-radius: 6px;
  padding: 0.15rem 0.5rem;
  font-family: inherit;
  font-size: 0.85rem;
}
.controls strong { color: var(--text); }

footer { color: #4a5274; font-size: 0.8rem; }