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

body {
  background: #080810;
  font-family: 'Segoe UI', system-ui, sans-serif;
  height: 100vh;
  overflow: hidden;
  user-select: none;
}

/* ── HUD ───────────────────────────────────────────── */
#hud {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(167,139,250,0.2);
  z-index: 100;
}

#hud-title {
  font-size: 1.25rem;
  font-weight: 900;
  letter-spacing: 3px;
  color: #a78bfa;
  text-shadow: 0 0 18px #7c3aed88;
}

#hud-score {
  font-size: 2rem;
  font-weight: 900;
  color: #fff;
  min-width: 80px;
  text-align: center;
  transition: transform 0.1s;
}

#hud-score.bump {
  transform: scale(1.3);
}

#hud-lives {
  font-size: 1.4rem;
  letter-spacing: 3px;
  min-width: 90px;
  text-align: right;
}

/* ── Arena ─────────────────────────────────────────── */
#arena {
  position: fixed;
  top: 60px; left: 0; right: 0; bottom: 0;
}

/* ── Falling words ─────────────────────────────────── */
.word {
  position: absolute;
  padding: 9px 22px;
  border-radius: 100px;
  font-size: 1.05rem;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
  border: 2px solid transparent;
  animation: fall linear forwards;
  will-change: transform;
}

.word:hover { filter: brightness(1.25); }

@keyframes fall {
  from { top: -70px; }
  to   { top: calc(100% + 20px); }
}

.word.boom-good {
  animation: boom-good 0.35s ease-out forwards !important;
  pointer-events: none;
}

.word.boom-bad {
  animation: boom-bad 0.35s ease-out forwards !important;
  pointer-events: none;
}

@keyframes boom-good {
  0%   { transform: scale(1);   opacity: 1; }
  50%  { transform: scale(1.5); opacity: 0.9; }
  100% { transform: scale(0.1); opacity: 0; }
}

@keyframes boom-bad {
  0%   { transform: translateX(0)    scale(1);   opacity: 1; }
  20%  { transform: translateX(-14px) scale(1.1); }
  60%  { transform: translateX(14px) scale(1.1); }
  100% { transform: translateX(0)    scale(0.1); opacity: 0; }
}

/* ── Score pop ─────────────────────────────────────── */
.score-pop {
  position: absolute;
  font-size: 1.5rem;
  font-weight: 900;
  pointer-events: none;
  transform: translateX(-50%);
  animation: score-rise 0.75s ease-out forwards;
  z-index: 60;
}

@keyframes score-rise {
  from { opacity: 1; top: var(--y); }
  to   { opacity: 0; top: calc(var(--y) - 70px); }
}

/* ── Miss tag ──────────────────────────────────────── */
.miss-tag {
  position: absolute;
  font-size: 0.85rem;
  font-weight: 700;
  color: #f97316;
  pointer-events: none;
  transform: translateX(-50%);
  animation: score-rise 0.6s ease-out forwards;
  z-index: 60;
}

/* ── Screen flash ──────────────────────────────────── */
#flash {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  z-index: 150;
}

/* ── Level badge ───────────────────────────────────── */
#level-badge {
  position: fixed;
  bottom: 16px;
  right: 20px;
  font-size: 0.8rem;
  font-weight: 700;
  color: #6d28d9;
  letter-spacing: 1px;
  opacity: 0.7;
}

/* ── Overlay ───────────────────────────────────────── */
#overlay {
  position: fixed;
  inset: 0;
  background: rgba(4,4,14,0.92);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 20px;
  z-index: 200;
  transition: opacity 0.3s;
}

#overlay-title {
  font-size: 3.5rem;
  font-weight: 900;
  letter-spacing: 6px;
  color: #fff;
  text-shadow: 0 0 30px #7c3aed, 0 0 60px #7c3aed44;
}

.overlay-sub {
  color: #94a3b8;
  font-size: 1rem;
  text-align: center;
  line-height: 1.7;
  max-width: 360px;
}

.overlay-sub strong { color: #a78bfa; }

#final-score {
  font-size: 2.2rem;
  font-weight: 900;
  color: #fbbf24;
  display: none;
}

#btn-play {
  margin-top: 8px;
  padding: 14px 52px;
  font-size: 1.15rem;
  font-weight: 800;
  background: linear-gradient(135deg, #7c3aed, #4f46e5);
  color: #fff;
  border: none;
  border-radius: 100px;
  cursor: pointer;
  letter-spacing: 1px;
  box-shadow: 0 0 24px #7c3aed66;
  transition: transform 0.15s, box-shadow 0.15s;
}

#btn-play:hover {
  transform: scale(1.06);
  box-shadow: 0 0 36px #7c3aedaa;
}

.key-hint {
  font-size: 0.78rem;
  color: #475569;
}