:root {
  --w: 1180px;
  --h: 820px;
  --bg: #fff8e8;
  --sky: #b8e6ff;
  --grass: #8fd46a;
  --panel: #ffffff;
  --text: #2b2118;
  --muted: #7a6a58;
  --orange: #ff9f43;
  --pink: #ff6b9d;
  --blue: #4dabf7;
  --purple: #9775fa;
  --green: #51cf66;
  --shadow: 0 10px 30px rgba(43, 33, 24, 0.12);
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  font-family: "Nunito", system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }

[hidden] {
  display: none !important;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #1a140f;
  touch-action: manipulation;
}

body {
  display: grid;
  place-items: center;
}

.stage {
  width: min(100vw, calc(100vh * 1180 / 820));
  height: min(100vh, calc(100vw * 820 / 1180));
  max-width: var(--w);
  max-height: var(--h);
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 15% 20%, rgba(255,255,255,0.65), transparent 28%),
    linear-gradient(180deg, var(--sky) 0%, var(--sky) 42%, var(--grass) 42%, #7bc95a 100%);
  color: var(--text);
  box-shadow: 0 0 0 1px rgba(255,255,255,0.08), 0 24px 80px rgba(0,0,0,0.35);
}

.btn {
  border: none;
  cursor: pointer;
  font: inherit;
  font-weight: 900;
  border-radius: 18px;
  padding: 16px 24px;
  transition: transform 0.12s ease;
}

.btn:active { transform: scale(0.97); }

.btn-primary {
  background: linear-gradient(135deg, #ffd43b, #ff922b);
  color: #2b2118;
  box-shadow: var(--shadow);
}

.btn-secondary {
  background: rgba(255,255,255,0.9);
  color: var(--muted);
  box-shadow: var(--shadow);
}

.btn-success {
  background: linear-gradient(135deg, #8ce99a, #51cf66);
  color: #1b4332;
  box-shadow: var(--shadow);
}

.back-link {
  position: absolute;
  top: calc(18px + var(--safe-top));
  left: calc(24px + var(--safe-left));
  z-index: 5;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  border-radius: 16px;
  background: rgba(255,255,255,0.88);
  box-shadow: var(--shadow);
  color: var(--text);
  text-decoration: none;
  font-weight: 800;
  font-size: 16px;
}

.rotate-hint {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 50;
  background: #fff8e8;
  color: var(--text);
  place-items: center;
  padding: 32px;
  text-align: center;
  font-size: 28px;
  font-weight: 900;
  line-height: 1.3;
}

@media (orientation: portrait) and (max-width: 900px) {
  .rotate-hint { display: grid; }
}