* { margin: 0; padding: 0; box-sizing: border-box; }
html, body {
  width: 100%; height: 100%;
  overflow: hidden;
  background: #0b1026;
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", sans-serif;
  touch-action: none;
  -webkit-user-select: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
  overscroll-behavior: none;
}
#game-container { position: fixed; inset: 0; }
#game-container canvas { display: block; }

.gate-overlay {
  position: fixed; inset: 0; z-index: 10;
  display: flex; align-items: center; justify-content: center;
  background: rgba(8, 10, 25, 0.84);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
}
.gate-overlay.hidden { display: none; }
.gate-card {
  width: min(340px, 88vw);
  background: linear-gradient(160deg, #1c2350, #2a1650);
  border: 2px solid #4d3fae;
  border-radius: 18px;
  padding: 28px 22px 20px;
  text-align: center;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.55);
}
.gate-title { font-size: 26px; font-weight: 800; color: #ffe066; letter-spacing: 1px; margin-bottom: 6px; }
.gate-sub { font-size: 13px; color: #b9bdf0; margin-bottom: 20px; }
.gate-card input {
  width: 100%; padding: 12px; font-size: 22px; text-align: center; letter-spacing: 3px;
  border-radius: 10px; border: 2px solid #6d63d6; background: #12173a; color: #fff; outline: none;
}
.gate-card button {
  width: 100%; margin-top: 12px; padding: 12px; font-size: 17px; font-weight: 700;
  color: #141b3c; background: linear-gradient(90deg, #ffd94a, #ffb13c);
  border: none; border-radius: 10px; cursor: pointer;
}
.gate-error { min-height: 20px; margin-top: 10px; font-size: 13px; color: #ff7b7b; }
.gate-hint { margin-top: 8px; font-size: 12px; color: #8f94c9; }