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

:root {
  --bg:         #0a0b0f;
  --bg2:        #10121a;
  --bg3:        #181c28;
  --border:     #1e2235;
  --accent:     #5b6ef5;
  --accent2:    #7c3aed;
  --green:      #22d3a0;
  --orange:     #f59e0b;
  --red:        #ef4444;
  --text:       #e8eaf6;
  --text-dim:   #6b7280;
  --sniper-col: #5b6ef5;
  --swarm-col:  #f59e0b;
  --trace-col:  #22d3a0;
  --glow-blue:  0 0 20px rgba(91,110,245,0.45);
  --glow-green: 0 0 20px rgba(34,211,160,0.45);
  --glow-orange:0 0 20px rgba(245,158,11,0.45);
}

html, body {
  width: 100%; height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: 'Outfit', sans-serif;
  overflow: hidden;
  user-select: none;
}

#hud {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 64px;
  background: rgba(10,11,15,0.92);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 28px;
  z-index: 100;
}

.hud-left { display: flex; align-items: center; gap: 16px; }
.logo { font-size: 1.2rem; font-weight: 700; letter-spacing: -0.5px; }

.mode-badge {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: 20px;
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text-dim);
  transition: all 0.4s;
}
.mode-badge.sniper { background: rgba(91,110,245,0.15); border-color: var(--sniper-col); color: var(--sniper-col); }
.mode-badge.swarm  { background: rgba(245,158,11,0.15); border-color: var(--swarm-col); color: var(--swarm-col); }
.mode-badge.trace  { background: rgba(34,211,160,0.15); border-color: var(--trace-col); color: var(--trace-col); }

.hud-center { display: flex; gap: 40px; align-items: center; }

.stat-block { display: flex; flex-direction: column; align-items: center; gap: 1px; }
.stat-val {
  font-size: 1.5rem; font-weight: 700; line-height: 1;
  transition: transform 0.1s;
}
.stat-val.pop { transform: scale(1.3); }
.stat-label {
  font-size: 0.6rem; font-weight: 600; letter-spacing: 2px;
  color: var(--text-dim);
}

.hud-right { display: flex; align-items: center; gap: 10px; }
.coverage-label { font-size: 0.6rem; font-weight: 600; letter-spacing: 2px; color: var(--text-dim); }
.coverage-bar-wrap {
  width: 120px; height: 6px;
  background: var(--bg3);
  border-radius: 3px;
  overflow: hidden;
}
.coverage-bar {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--accent), var(--green));
  border-radius: 3px;
  transition: width 0.5s ease;
}
.coverage-pct { font-size: 0.85rem; font-weight: 600; min-width: 36px; }

.btn-stop {
  background: rgba(239,68,68,0.12);
  color: #ef4444;
  border: 1px solid rgba(239,68,68,0.35);
  border-radius: 8px;
  padding: 5px 14px;
  font-size: 0.78rem;
  font-weight: 600;
  font-family: 'Outfit', sans-serif;
  cursor: pointer;
  transition: all 0.2s;
  margin-left: 12px;
}
.btn-stop:hover { background: rgba(239,68,68,0.25); border-color: #ef4444; }
.btn-stop:active { transform: scale(0.96); }

.hidden { display: none !important; }

#arena { position: fixed; top: 64px; left: 0; right: 0; bottom: 0; }
#gameCanvas { display: block; width: 100%; height: 100%; cursor: crosshair; }

.overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(10,11,15,0.88);
  backdrop-filter: blur(16px);
  z-index: 50;
  transition: opacity 0.35s;
}
.overlay.hidden { display: none; }

.overlay-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 48px 56px;
  max-width: 680px;
  width: 90%;
  text-align: center;
  box-shadow: 0 32px 80px rgba(0,0,0,0.6);
}
.overlay-card.small { padding: 40px 48px; max-width: 420px; }

.overlay-card h1 {
  font-size: 3rem; font-weight: 900;
  background: linear-gradient(135deg, var(--accent), var(--green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
}
.overlay-card h2 { font-size: 1.8rem; font-weight: 700; margin-bottom: 10px; }

.sub { color: var(--text-dim); font-size: 0.9rem; margin-bottom: 20px; }
.desc { color: var(--text-dim); font-size: 0.9rem; line-height: 1.7; margin-bottom: 32px; }
.desc strong { color: var(--text); }

.mode-preview { display: flex; gap: 16px; justify-content: center; margin-bottom: 36px; }
.mode-card {
  flex: 1;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 16px;
  transition: border-color 0.3s, transform 0.3s;
}
.mode-card:hover { border-color: var(--accent); transform: translateY(-4px); }
.mode-name { font-weight: 700; font-size: 1rem; margin-bottom: 4px; }
.mode-desc { font-size: 0.75rem; color: var(--text-dim); }

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  border: none;
  border-radius: 12px;
  padding: 14px 40px;
  font-size: 1rem;
  font-weight: 600;
  font-family: 'Outfit', sans-serif;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: var(--glow-blue);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 32px rgba(91,110,245,0.6); }
.btn-primary:active { transform: scale(0.97); }

.transition-icon { font-size: 4rem; margin-bottom: 16px; }
.countdown {
  font-size: 5rem;
  font-weight: 900;
  background: linear-gradient(135deg, var(--accent), var(--green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: pulsate 1s ease infinite;
}
@keyframes pulsate {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.1); }
}

.final-stats { display: flex; justify-content: center; gap: 32px; margin: 24px 0; }
.final-stat { text-align: center; }
.final-stat .val { font-size: 2rem; font-weight: 700; color: var(--green); }
.final-stat .lbl { font-size: 0.7rem; color: var(--text-dim); letter-spacing: 1.5px; }

.coverage-detail {
  background: var(--bg3);
  border-radius: 12px;
  padding: 16px 24px;
  margin-bottom: 28px;
  text-align: left;
}
.bucket-row { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
.bucket-label { font-size: 0.75rem; color: var(--text-dim); width: 90px; flex-shrink: 0; }
.bucket-bar-wrap { flex: 1; height: 5px; background: var(--bg); border-radius: 3px; overflow: hidden; }
.bucket-bar-fill { height: 100%; border-radius: 3px; background: var(--green); transition: width 0.8s ease; }
.bucket-count { font-size: 0.75rem; color: var(--text-dim); width: 50px; text-align: right; }

.hit-ring {
  position: absolute;
  pointer-events: none;
  border-radius: 50%;
  border: 2px solid var(--green);
  animation: ring-out 0.5s ease forwards;
}
@keyframes ring-out {
  0%   { transform: scale(0.5); opacity: 1; }
  100% { transform: scale(2.5); opacity: 0; }
}

.score-pop {
  position: absolute;
  pointer-events: none;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--green);
  animation: score-float 0.8s ease forwards;
}
@keyframes score-float {
  0%   { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(-60px); opacity: 0; }
}