html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  overflow: hidden;
  background: #87ceeb;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  color: #fff;
  user-select: none;
  -webkit-user-select: none;
}

#game {
  display: block;
  width: 100vw;
  height: 100vh;
  touch-action: none;
}

/* ---------- In-game HUD ---------- */
#hud {
  position: fixed;
  top: 12px;
  left: 12px;
  right: 12px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  pointer-events: none;
  z-index: 4;
}
#hud[hidden] { display: none; }

#level-info {
  font-size: 22px;
  font-weight: 700;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.6);
  pointer-events: none;
}

#menu-btn {
  pointer-events: auto;
  font-size: 15px;
  font-weight: 600;
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  background: rgba(0, 0, 0, 0.55);
  color: #fff;
  cursor: pointer;
  backdrop-filter: blur(4px);
}
#menu-btn:hover { background: rgba(0, 0, 0, 0.75); }

/* ---------- Progress bar ---------- */
#progress {
  position: fixed;
  bottom: 22px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 4;
  text-align: center;
  pointer-events: none;
  font-weight: 600;
  color: #fff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.6);
}
#progress[hidden] { display: none; }
#progress-text {
  font-size: 14px;
  margin-bottom: 5px;
  letter-spacing: 0.3px;
}
#progress-bar {
  width: 220px;
  height: 6px;
  background: rgba(0, 0, 0, 0.35);
  border-radius: 3px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.2);
}
#progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #4eb3ff, #2bbf5f);
  transition: width 0.35s ease-out;
}

/* ---------- HUD question (style 5 of the Q/A test level) ---------- */
#hud-question {
  position: fixed;
  bottom: 70px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.7);
  padding: 10px 22px;
  border-radius: 10px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.4px;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
  pointer-events: none;
  z-index: 5;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.35);
}
#hud-question[hidden] { display: none; }

/* ---------- Answer reveal (after wrong answer) ---------- */
#answer-reveal {
  position: fixed;
  top: 28%;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.82);
  padding: 22px 38px;
  border-radius: 14px;
  font-size: 44px;
  font-weight: 700;
  text-align: center;
  z-index: 11;
  pointer-events: none;
  opacity: 1;
  transition: opacity 0.55s ease-out;
  white-space: nowrap;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.4);
}
#answer-reveal[hidden] { display: none; }
#reveal-prompt  { color: #fff; }
#reveal-correct { color: #41d775; margin-left: 4px; }
#reveal-correct.wrong { color: #ff5a5a; }   /* red — shows the wrong word the player stepped on */

/* ---------- Death flash ---------- */
#death-flash {
  position: fixed;
  inset: 0;
  background: #ff2030;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease-out;
  z-index: 8;
}

/* ---------- Level complete overlay ---------- */
#level-complete {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.55);
  text-align: center;
  z-index: 9;
}
#level-complete[hidden] { display: none; }
#level-complete h1 { font-size: 64px; margin: 0 0 12px; }
#level-complete p { font-size: 22px; margin: 0; opacity: 0.9; }

/* ---------- Touch controls ---------- */
#touch-joystick {
  position: fixed;
  left: 24px;
  bottom: 24px;
  width: 140px;
  height: 140px;
  z-index: 5;
}
#touch-jump {
  position: fixed;
  right: 32px;
  bottom: 56px;
  width: 96px;
  height: 96px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.25);
  border: 2px solid rgba(255, 255, 255, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 18px;
  z-index: 5;
  touch-action: none;
}
#touch-jump[hidden], #touch-joystick[hidden] { display: none; }

/* ---------- Level select menu ---------- */
#menu {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, #87ceeb 0%, #f9c89b 100%);
  z-index: 10;
}
#menu[hidden] { display: none; }

.menu-card {
  background: rgba(255, 255, 255, 0.92);
  color: #1f2c3a;
  padding: 36px 44px;
  border-radius: 16px;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.25);
  text-align: center;
  min-width: 360px;
  max-width: 460px;
}
.menu-card h1 {
  margin: 0 0 4px;
  font-size: 40px;
  color: #ff7a3a;
  letter-spacing: -0.5px;
}
.menu-card .subtitle {
  margin: 0 0 24px;
  font-size: 16px;
  color: #5a6573;
}
.menu-card .hint {
  margin: 24px 0 0;
  font-size: 12px;
  color: #7a8593;
}

#menu-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.level-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 20px;
  font-size: 18px;
  font-weight: 600;
  border: 2px solid #f1d5b8;
  border-radius: 10px;
  background: #fff;
  color: #1f2c3a;
  cursor: pointer;
  text-align: left;
  transition: transform 0.08s ease, background 0.15s ease, border-color 0.15s ease;
}
.level-btn:hover {
  background: #fff5ed;
  border-color: #ff7a3a;
  transform: translateY(-1px);
}
.level-btn:active { transform: translateY(1px); }
.level-btn .num   { color: #ff7a3a; font-weight: 800; min-width: 26px; }
.level-btn .title { flex: 1; }
.level-btn .tick  { color: #2bbf5f; font-weight: 800; }