:root {
  --bg: #0b1020;
  --text: #e8eefc;
  --accent: #7bdcff;
  --panel: rgba(20, 26, 48, 0.7);
  --panel-border: rgba(123, 220, 255, 0.3);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 50% -10%, #1b2a6b, #0b1020 65%);
  color: var(--text);
  overflow: hidden;
}

#app { width: 100vw; height: 100vh; position: relative; }
#game { display: block; width: 100%; height: 100%; }

#overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  backdrop-filter: blur(8px) saturate(120%);
}

.hidden { display: none; }

/* Ensure overlay truly hides even with ID specificity */
#overlay.hidden { display: none; }

.panel {
  width: min(520px, 92vw);
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  padding: 24px;
  box-shadow:
    0 10px 30px rgba(0, 0, 0, 0.45),
    inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.panel h1 {
  margin: 8px 0 6px 0;
  font-weight: 800;
  letter-spacing: 0.2px;
}

#subtitle { opacity: 0.8; margin: 0 0 10px 0; }

.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 16px 0; }
.stats .label { opacity: 0.7; font-size: 12px; display: block; }
.stats span:last-child { font-weight: 800; font-size: 22px; }

.color-picker { margin: 8px 0 16px 0; }
.color-picker .label { opacity: 0.7; font-size: 12px; display: block; margin-bottom: 6px; }
.swatches { display: flex; gap: 8px; flex-wrap: wrap; }
.swatch {
  width: 28px; height: 28px; border-radius: 999px;
  border: 2px solid rgba(255,255,255,0.25);
  cursor: pointer; background: #fff0; position: relative;
  box-shadow: inset 0 0 0 1px rgba(0,0,0,0.25), 0 4px 10px rgba(0,0,0,0.25);
}
.swatch[data-color="red"] { background: linear-gradient(180deg, #ff8a8a, #ff3b3b); }
.swatch[data-color="white"] { background: linear-gradient(180deg, #ffffff, #e9eef5); }
.swatch[data-color="black"] { background: linear-gradient(180deg, #3b3b3b, #0f0f0f); }
.swatch[data-color="purple"] { background: linear-gradient(180deg, #b28bff, #7a50ff); }
.swatch[data-color="pink"] { background: linear-gradient(180deg, #ffb1df, #ff5bb5); }
.swatch.active { outline: 2px solid var(--accent); outline-offset: 2px; }

.buttons { display: flex; gap: 12px; flex-wrap: wrap; }
.buttons button {
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid var(--panel-border);
  background: linear-gradient(180deg, rgba(123,220,255,0.25), rgba(123,220,255,0.1));
  color: var(--text);
  cursor: pointer;
  font-weight: 600;
  letter-spacing: 0.2px;
  transition: transform 120ms ease, filter 120ms ease, box-shadow 120ms ease;
  box-shadow: 0 6px 16px rgba(123,220,255,0.15);
}
.buttons button:hover { transform: translateY(-1px); filter: brightness(1.05); }
.buttons button:active { transform: translateY(0px) scale(0.99); }

@media (max-width: 520px) {
  .panel { padding: 16px; }
}