/* ----- Base ----- */
* {
  box-sizing: border-box;
}

:root {
  --bg: #0f172a;            /* slate-900 */
  --panel: #111827;         /* gray-900 */
  --panel-2: #1f2937;       /* gray-800 */
  --text: #e5e7eb;          /* gray-200 */
  --muted: #9ca3af;         /* gray-400 */
  --accent: #22d3ee;        /* cyan-400 */
  --accent-2: #38bdf8;      /* sky-400 */
  --danger: #ef4444;        /* red-500 */
  --success: #22c55e;       /* green-500 */
  --shadow: 0 10px 30px rgba(0,0,0,.35);
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  background: radial-gradient(1200px 600px at 50% -10%, #1e293b 0%, var(--bg) 60%);
  color: var(--text);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  display: grid;
  place-items: center;
}

/* ----- Layout ----- */
.wrapper {
  width: min(92vw, 760px);
  display: grid;
  gap: 16px;
}

.title {
  margin: 8px 0 0;
  font-weight: 800;
  letter-spacing: .5px;
  text-align: center;
}

/* ----- Controls ----- */
.controls {
  display: grid;
  gap: 10px;
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid rgba(255,255,255,.06);
  border-radius: 16px;
  padding: 12px;
  box-shadow: var(--shadow);
}

.controls > * {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.scoreboard {
  font-weight: 700;
}

/* ----- Buttons ----- */
.btn {
  appearance: none;
  border: 1px solid rgba(255,255,255,.12);
  background: #0b1220;
  color: var(--text);
  padding: 8px 14px;
  border-radius: 10px;
  cursor: pointer;
  transition: transform .06s ease, background .2s ease, border-color .2s ease;
  font-weight: 600;
}

.btn:hover {
  transform: translateY(-1px);
  background: #0e1526;
  border-color: rgba(255,255,255,.22);
}

.btn:active {
  transform: translateY(0);
}

.btn.primary {
  background: linear-gradient(180deg, var(--accent), var(--accent-2));
  color: #051320;
  border: none;
}

.btn.primary:hover {
  filter: brightness(1.05);
}

.btn[data-level="easy"]  { border-color: rgba(34,197,94,.6); }
.btn[data-level="medium"]{ border-color: rgba(234,179,8,.6); }
.btn[data-level="hard"]  { border-color: rgba(239,68,68,.6); }

/* Remove pesky focus re-clicks via Space */
button:focus-visible {
  outline: 2px solid var(--accent-2);
  outline-offset: 2px;
}

/* ----- Game Canvas Container ----- */
.game-container {
  background: #70c5ce; /* sky-like; your JS also paints background each frame */
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 16px;
  box-shadow: var(--shadow);
  overflow: hidden;
  display: grid;
  place-items: center;
  padding: 8px; /* keeps canvas from touching rounded corners */
}

/* Canvas gets fixed size in JS; keep it crisp on page */
#gameCanvas {
  display: block;
  width: 400px;
  height: 500px;
  image-rendering: pixelated;
  background: transparent; /* JS draws the bg */
  border-radius: 10px;
}

/* ----- Misc ----- */
.hint {
  text-align: center;
  color: var(--muted);
  font-size: 14px;
  margin: 2px 0 10px;
}

/* Responsive: shrink canvas wrapper on small screens (JS still uses 400x500 internal) */
@media (max-width: 460px) {
  #gameCanvas {
    width: 100%;
    height: auto; /* maintains aspect visually, internal draw size unchanged */
  }
}