:root {
  color-scheme: dark;
  --bg: #0b0f12;
  --panel: #141a1f;
  --panel-2: #1b232a;
  --text: #f6f8fa;
  --muted: #aab6bf;
  --accent: #5fe0a3;
  --danger: #ff6b6b;
  --border: rgba(255,255,255,.09);
  --target-size: 34%;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: var(--bg); color: var(--text); font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
body { overscroll-behavior: none; }
button, input { font: inherit; }
[hidden] { display: none !important; }

.app-shell { width: min(100%, 780px); min-height: 100dvh; margin: 0 auto; padding: max(10px, env(safe-area-inset-top)) 12px max(14px, env(safe-area-inset-bottom)); display: flex; flex-direction: column; }
header { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 8px; }
h1 { margin: 0; font-size: clamp(1.35rem, 5vw, 2rem); }
h2 { margin: 0; }
.eyebrow { margin: 0 0 1px; color: var(--accent); font-weight: 700; letter-spacing: .08em; text-transform: uppercase; font-size: .68rem; }
.header-actions { display: flex; gap: 8px; }

.panel { background: linear-gradient(180deg, var(--panel), #11171b); border: 1px solid var(--border); border-radius: 20px; padding: 16px; box-shadow: 0 12px 35px rgba(0,0,0,.22); }
.game-view { flex: 1; min-height: 0; display: flex; flex-direction: column; }

button { border: 0; border-radius: 14px; padding: 13px 14px; background: var(--accent); color: #062316; font-weight: 800; cursor: pointer; }
button:active { transform: translateY(1px); }
button.secondary, button.ghost { background: var(--panel-2); color: var(--text); border: 1px solid var(--border); }
button.compact { padding: 9px 11px; min-width: 44px; }
button:disabled { opacity: .55; cursor: not-allowed; }
.button-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px; }

.scorebar { display: grid; grid-template-columns: repeat(3,1fr); gap: 6px; margin-bottom: 8px; }
.scorebar > div { background: var(--panel-2); border-radius: 12px; padding: 7px 6px; text-align: center; }
.label { display:block; color: var(--muted); font-size:.7rem; margin-bottom: 2px; }
.scorebar strong { font-size: clamp(.9rem,3.7vw,1.2rem); }

.game-area { position: relative; width: min(100%, calc(100dvh - 170px)); margin: auto; aspect-ratio: 1 / 1; overflow: hidden; border-radius: 50%; background:
  repeating-radial-gradient(circle at center, transparent 0 39px, rgba(255,255,255,.045) 40px 41px),
  linear-gradient(145deg, #0d1216, #202a31);
  border: 7px solid #252f36;
  box-shadow: inset 0 0 40px rgba(0,0,0,.55), 0 14px 35px rgba(0,0,0,.25);
  touch-action: none;
}
.target-ring { position:absolute; left:50%; top:50%; width:var(--target-size); aspect-ratio:1; transform:translate(-50%,-50%); border-radius:50%; border:5px solid var(--accent); background:rgba(95,224,163,.12); box-shadow:0 0 24px rgba(95,224,163,.22); }
.ball { position:absolute; left:50%; top:50%; width:12%; aspect-ratio:1; transform:translate(-50%,-50%); border-radius:50%; background:radial-gradient(circle at 35% 30%, #fff 0 8%, #ffd36a 18%, #ff9f43 58%, #b84e00 100%); box-shadow:0 8px 15px rgba(0,0,0,.35); will-change:left,top; }
.game-area.outside .target-ring { border-color: var(--danger); background:rgba(255,107,107,.12); box-shadow:0 0 28px rgba(255,107,107,.3); }
.countdown { position:absolute; inset:0; display:grid; place-items:center; font-size:clamp(3rem,20vw,7rem); font-weight:900; background:rgba(0,0,0,.25); z-index: 5; pointer-events:none; }
.bottom-buttons { margin-top: 8px; }

.settings-panel { margin-top: 4px; }
.settings-heading { display:flex; justify-content:space-between; align-items:center; gap:12px; margin-bottom:18px; }
.controls { display: grid; gap: 16px; }
.control-row { display: grid; gap: 8px; }
.control-row label { display: flex; justify-content: space-between; color: var(--muted); }
input[type="range"] { width: 100%; accent-color: var(--accent); }
.settings-buttons { margin-top: 18px; }
.settings-buttons button:last-child { grid-column: 1 / -1; }
.hint { margin: 12px 0; color: var(--muted); font-size:.88rem; text-align:center; }
.warning { background: rgba(255,180,70,.12); border: 1px solid rgba(255,180,70,.25); padding: 12px; border-radius: 14px; color: #ffd99d; font-size: .9rem; }

@media (max-width: 480px) {
  .button-grid { grid-template-columns: 1fr 1fr; }
  .settings-buttons { grid-template-columns: 1fr; }
  .settings-buttons button:last-child { grid-column: auto; }
}