*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root { --ch-gold: #f0a020; --ch-ink: #1a1208; --ch-dirt: #3a2810; --ch-green: #6a9030; }
body {
  background: var(--ch-ink); color: #f0e0c0;
  font-family: 'Syne Mono', ui-monospace, monospace;
  overflow: hidden; height: 100vh; height: 100dvh;
}
#ch-app { position: relative; width: 100vw; height: 100vh; height: 100dvh; }
#ch-canvas { display: block; width: 100%; height: 100%; }
#ch-hud {
  position: absolute; top: 0; left: 0; right: 0; z-index: 10;
  display: flex; align-items: center; gap: 1rem; padding: 0.7rem 1rem;
  background: linear-gradient(to bottom, rgba(26,18,8,0.92), transparent);
  font-size: 0.75rem; pointer-events: none;
}
.ch-meter { display: flex; flex-direction: column; gap: 0.2rem; min-width: 150px; }
.ch-meter span { opacity: 0.6; font-size: 0.65rem; letter-spacing: 0.08em; text-transform: uppercase; }
.ch-bar { height: 8px; background: rgba(255,255,255,0.1); border: 1px solid rgba(240,160,32,0.4); }
#ch-stam { height: 100%; width: 100%; background: linear-gradient(90deg, #f0a020, #ff4040); }
#ch-mode { flex: 1; text-align: center; opacity: 0.75; }
#ch-lead { color: var(--ch-gold); font-family: 'Bungee', sans-serif; font-size: 0.85rem; }
.ch-screen {
  position: absolute; inset: 0; display: none; flex-direction: column;
  align-items: center; justify-content: center; text-align: center; padding: 1.5rem;
  background: radial-gradient(ellipse at 40% 20%, rgba(240,160,32,0.14), transparent 50%), rgba(26,18,8,0.94);
  z-index: 30;
}
.ch-screen.active { display: flex; }
.ch-credit { font-size: 0.65rem; letter-spacing: 0.18em; text-transform: uppercase; opacity: 0.55; margin-bottom: 0.6rem; }
#ch-start h1, #ch-over h2 {
  font-family: 'Bungee', sans-serif; font-size: clamp(2rem, 9vw, 4rem);
  color: var(--ch-gold); text-shadow: 4px 4px 0 #3a2008, -2px 0 0 #ff4040; margin-bottom: 0.85rem;
}
.ch-tagline { max-width: 34rem; color: #e08040; margin-bottom: 0.9rem; line-height: 1.45; }
.ch-sub { max-width: 30rem; opacity: 0.85; line-height: 1.55; margin-bottom: 1.3rem; font-size: 0.9rem; }
#ch-play-btn, #ch-retry-btn {
  font-family: 'Bungee', sans-serif; font-size: 0.95rem; letter-spacing: 0.08em;
  padding: 0.85rem 1.6rem; border: 3px solid var(--ch-gold); background: #2a1808; color: var(--ch-gold);
  cursor: pointer; box-shadow: 5px 5px 0 #501808;
}
#ch-play-btn:hover, #ch-retry-btn:hover { background: #3a2410; }
.ch-controls { margin-top: 1rem; font-size: 0.72rem; opacity: 0.5; }
.ch-controls kbd { border: 1px solid rgba(240,160,32,0.4); padding: 0.1rem 0.35rem; }
#ch-over-msg { max-width: 28rem; margin-bottom: 1.2rem; line-height: 1.5; }
.ch-exit {
  position: absolute; top: 0.75rem; right: 0.85rem; z-index: 50;
  color: rgba(240,224,192,0.55); text-decoration: none; font-size: 0.75rem;
}
.ch-exit:hover { color: var(--ch-gold); }