:root {
  --bg: #070b1a;
  --bg-2: #0d1430;
  --panel: rgba(12, 18, 40, 0.92);
  --ink: #eaf0ff;
  --muted: #818bb5;
  --accent: #46e0ff;
  --accent-2: #ff5c7a;
  --line: rgba(255, 255, 255, 0.08);
  --radius: 16px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  min-height: 100%;
  background: radial-gradient(1200px 700px at 50% -10%, var(--bg-2), var(--bg));
  color: var(--ink);
  -webkit-tap-highlight-color: transparent;
}
.layout {
  display: grid;
  grid-template-rows: auto 1fr auto;
  min-height: 100vh;
  gap: 14px;
  padding: 14px;
}

/* Ads */
.ad-rail { display: flex; justify-content: center; align-items: center; min-height: 90px; }
.ad-slot { width: 100%; max-width: 728px; }
.ad-placeholder {
  width: 100%; max-width: 728px; min-height: 90px;
  display: flex; align-items: center; justify-content: center;
  border: 1px dashed var(--line); border-radius: 12px;
  color: var(--muted); font-size: 12px; letter-spacing: 0.18em;
  text-transform: uppercase; background: rgba(255, 255, 255, 0.02);
}
.ad-rail.ad-live .ad-placeholder { display: none; }
.ad-rail:not(.ad-live) .ad-slot { display: none !important; }

/* Stage */
.stage { max-width: 1040px; width: 100%; margin: 0 auto; }
.game-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 8 / 5;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}
#game {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(180deg, #0a1130 0%, #060912 100%);
  cursor: crosshair;
  touch-action: none;
}

/* HUD */
.hud {
  position: absolute;
  top: 12px; left: 0; right: 0;
  display: flex; justify-content: space-between;
  padding: 0 18px;
  pointer-events: none;
  font-size: 14px; letter-spacing: 0.12em;
  color: var(--muted);
}
.hud b { color: var(--ink); font-size: 20px; margin-left: 6px; font-variant-numeric: tabular-nums; }

.mute-btn {
  position: absolute; top: 12px; right: 12px; z-index: 5;
  width: 38px; height: 38px; border-radius: 50%;
  border: 1px solid var(--line); background: rgba(12, 18, 40, 0.7);
  color: var(--ink); font-size: 16px; line-height: 1; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  backdrop-filter: blur(4px);
  transition: filter 0.15s ease, transform 0.06s ease;
}
.mute-btn:hover { filter: brightness(1.25); }
.mute-btn:active { transform: scale(0.94); }
.mute-btn.is-muted { opacity: 0.6; }

/* Overlay */
.overlay {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(6, 9, 22, 0.66); backdrop-filter: blur(3px);
  transition: opacity 0.2s ease;
}
.overlay.hidden { opacity: 0; pointer-events: none; }
.panel {
  width: min(460px, 88%);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 26px; text-align: center;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}
.logo { margin: 0 0 10px; font-size: clamp(30px, 5vw, 44px); font-weight: 800; letter-spacing: 0.06em; }
.logo span { color: var(--accent); }
.msg { color: var(--muted); font-size: 14px; line-height: 1.6; margin: 0 0 20px; }
.msg b { color: var(--ink); }
.result { margin-bottom: 16px; }
.big-score { font-size: 56px; font-weight: 800; color: var(--accent); line-height: 1; }
.result-line { color: var(--muted); font-size: 14px; margin-top: 6px; }
.btn {
  border: none; border-radius: 12px; padding: 13px 18px;
  font-size: 16px; font-weight: 700; cursor: pointer;
  transition: transform 0.06s ease, filter 0.15s ease;
}
.btn:active { transform: translateY(1px); }
.btn--primary {
  width: 100%;
  background: linear-gradient(135deg, var(--accent), #6a7bff);
  color: #04121b;
}
.btn--primary:hover { filter: brightness(1.06); }
.hint { margin-top: 12px; color: var(--muted); font-size: 13px; }
.hidden { display: none !important; }

.btn--ghost { background: rgba(255, 255, 255, 0.08); color: var(--ink); white-space: nowrap; }
.name-row { display: flex; gap: 8px; margin-bottom: 16px; }
#name-input {
  flex: 1; background: rgba(0, 0, 0, 0.3); border: 1px solid var(--line);
  border-radius: 10px; color: var(--ink); padding: 10px 12px; font-size: 15px; outline: none;
}
#name-input:focus { border-color: var(--accent); }

/* Leaderboard */
.leaderboard {
  margin-top: 18px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 20px;
}
.leaderboard h2 {
  margin: 0 0 12px; font-size: 16px; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--muted);
}
#leaderboard-list { list-style: none; margin: 0; padding: 0; counter-reset: rank; }
#leaderboard-list li {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 9px 0; border-bottom: 1px solid var(--line); font-size: 14px;
}
#leaderboard-list li:last-child { border-bottom: none; }
#leaderboard-list li:not(.lb-empty)::before {
  counter-increment: rank; content: counter(rank);
  width: 26px; color: var(--muted); font-variant-numeric: tabular-nums;
}
.lb-name { flex: 1; margin: 0 10px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.lb-score { font-weight: 700; color: var(--accent); font-variant-numeric: tabular-nums; }
.lb-empty { color: var(--muted); justify-content: center !important; }
li.is-you { color: var(--accent); }