html, body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #000;
}

canvas {
  display: block;
}

/* TITLE SCREEN UI */

.overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, rgba(8, 15, 28, 0.92), rgba(8, 15, 28, 0.75));
  color: #f2f6ff;
  z-index: 10;
}

.overlay[hidden] {
  display: none;
}

.panel {
  width: min(420px, calc(100vw - 32px));
  padding: 32px 28px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 20px;
  background: rgba(12, 22, 38, 0.9);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
}

.panel h1 {
  margin: 0 0 12px;
  font: 700 2.6rem/1.1 Georgia, "Times New Roman", serif;
  letter-spacing: 0.04em;
}

.panel p {
  margin: 0 0 24px;
  font: 400 1rem/1.5 Verdana, Geneva, sans-serif;
  color: rgba(242, 246, 255, 0.8);
}

.panel button {
  border: 0;
  border-radius: 999px;
  padding: 14px 26px;
  font: 700 1rem/1 Verdana, Geneva, sans-serif;
  cursor: pointer;
  color: #081523;
  background: #f4d35e;
}

/* GAMEPLAY UI */

#game-ui {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 5;
}

#time-tracker {
  position: absolute;
  top: 18px;
  left: 18px; /* 50% */
  transform: none; /* translateX(-50%) */
  min-width: 112px;
  padding: 10px 18px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 999px;
  background: rgba(10, 18, 32, 0.72);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.22);
  color: #f4f7fb;
  text-align: center;
  font: 700 0.95rem/1 "Trebuchet MS", Verdana, sans-serif;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  backdrop-filter: blur(8px);
}

#time-tracker[hidden] {
  display: none;
}