#introOverlay {
  position: fixed; inset: 0; z-index: 9998;
  background:
    linear-gradient(180deg, rgba(20,26,14,0.55) 0%, rgba(18,24,12,0.35) 40%, rgba(12,18,8,0.75) 78%, rgba(10,14,6,0.92) 100%),
    url('assets/menu_bg.webp') center center / cover no-repeat;
  display: flex; flex-direction: column; align-items: center; justify-content: flex-end;
  overflow: hidden;
  font-family: Georgia, 'Times New Roman', serif;
  color: #fff;
}
#introOverlay.hide { display: none; }

.intro-sparkle { position: absolute; font-size: 15px; opacity: 0.6; animation: introTwinkle 2.4s ease-in-out infinite; filter: drop-shadow(0 0 3px rgba(0,0,0,0.5)); }
@keyframes introTwinkle { 0%,100% { opacity: 0.15; transform: translateY(0); } 50% { opacity: 0.8; transform: translateY(-6px); } }

#introMascotWrap {
  position: relative;
  z-index: 1;
  display: flex; flex-direction: column; align-items: center;
  margin-bottom: 10px;
  flex-shrink: 0;
}
#introMascot {
  width: 130px;
  filter: drop-shadow(0 10px 18px rgba(0,0,0,0.55));
  animation: introHop 1.1s steps(2) infinite;
}
@keyframes introHop {
  0% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
  100% { transform: translateY(0); }
}

#introBubble {
  position: relative;
  z-index: 2;
  background: rgba(253,247,232,0.97);
  color: #3a2b18;
  border: 2px solid rgba(122,88,42,0.35);
  border-radius: 20px;
  padding: 18px 22px;
  max-width: 340px;
  margin-bottom: 14px;
  box-shadow: 0 8px 22px rgba(0,0,0,0.45);
  text-align: center;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}
#introBubble.active { opacity: 1; transform: translateY(0); }
#introBubble::after {
  content: '';
  position: absolute;
  bottom: -10px; left: 50%; transform: translateX(-50%);
  border-width: 10px 10px 0 10px;
  border-style: solid;
  border-color: rgba(253,247,232,0.97) transparent transparent transparent;
}
.intro-icon {
  display: block; width: 64px; height: 64px; object-fit: contain;
  margin: 0 auto 8px; filter: drop-shadow(0 4px 8px rgba(0,0,0,0.25));
}
.intro-title { font-size: 18px; font-weight: 900; margin-bottom: 6px; color: #4a7a3a; }
.intro-text { font-size: 14.5px; line-height: 1.5; }
.intro-tag {
  display:inline-block; margin-top:10px; font-size:11px; font-weight:800; letter-spacing:0.05em;
  color:#a8730f; background:rgba(255,183,71,0.15); border:1px solid rgba(255,183,71,0.45);
  border-radius:999px; padding:4px 12px;
}

#introDots {
  position: relative; z-index: 2;
  display: flex; gap: 4px;
  margin-bottom: max(30px, env(safe-area-inset-bottom));
}
.intro-dot {
  width: 20px; height: 20px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
}
.intro-dot::after {
  content: ''; width: 8px; height: 8px; border-radius: 50%;
  background: rgba(255,255,255,0.3); transition: background 0.3s, transform 0.3s;
}
.intro-dot.on::after { background: #ffd76a; transform: scale(1.3); }

#introSkip {
  position: absolute; top: max(16px, env(safe-area-inset-top)); right: 16px; z-index: 3;
  background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.25);
  color: #fff; font-size: 13px; font-weight: 700; padding: 7px 14px; border-radius: 999px;
}

#introStartBtn {
  position: relative; z-index: 2;
  background: linear-gradient(180deg, #ffd76a, #ffb347); color: #3a2200;
  border: none; font-size: 17px; font-weight: 900; padding: 15px 42px; border-radius: 999px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.4);
  margin-bottom: max(30px, env(safe-area-inset-bottom));
  display: none;
}
#introStartBtn.show { display: block; }
#introStartBtn:active { transform: scale(0.96); }

#introTapHint {
  position: absolute; top: max(60px, env(safe-area-inset-top)); left: 50%; transform: translateX(-50%);
  z-index: 2; font-size: 12px; opacity: 0.55; font-weight: 600;
}