* {
  box-sizing: border-box;
}

body {
  margin: 0;
  overflow: hidden;
  background: #050505;
  font-family: Arial, "Noto Sans TC", sans-serif;
  color: white;
}

#galleryCanvas {
  width: 100vw;
  height: 100vh;
  display: block;
}

#loading {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #050505;
  font-size: 20px;
  letter-spacing: 1px;
}

#hud {
  position: fixed;
  top: 18px;
  left: 20px;
  right: 20px;
  z-index: 20;
  min-height: 56px;
  padding: 0 22px;
  border-radius: 14px;
  background: rgba(10, 10, 12, 0.76);
  backdrop-filter: blur(10px);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  box-shadow: 0 8px 30px rgba(0,0,0,0.35);
}

.brand {
  color: #d6ae6d;
  font-weight: bold;
  letter-spacing: 2px;
}

.title {
  font-size: 14px;
  padding: 8px 18px;
  background: rgba(255,255,255,0.08);
  border-radius: 999px;
}

.hint {
  text-align: right;
  font-size: 12px;
  opacity: 0.7;
}

#introPanel {
  position: fixed;
  z-index: 40;
  left: 50%;
  bottom: 56px;
  transform: translateX(-50%);
  width: min(520px, 88vw);
  padding: 28px;
  border-radius: 24px;
  background: rgba(8, 8, 10, 0.84);
  backdrop-filter: blur(14px);
  text-align: center;
  box-shadow: 0 18px 60px rgba(0,0,0,0.5);
}

#introPanel h1 {
  margin: 0 0 10px;
  color: #d6ae6d;
}

#introPanel p {
  margin: 0 0 22px;
  opacity: 0.82;
  line-height: 1.6;
}

#startBtn {
  padding: 14px 28px;
  border: 0;
  border-radius: 999px;
  background: #d6ae6d;
  color: #15100a;
  font-weight: bold;
  cursor: pointer;
}

#elevatorOverlay {
  position: fixed;
  inset: 0;
  z-index: 80;
  background: #080808;
  overflow: hidden;
}

#elevatorOverlay.hidden {
  display: none;
}

.elevator-door {
  position: absolute;
  top: 0;
  width: 50%;
  height: 100%;
  background: linear-gradient(90deg, #171717, #444, #191919);
  transition: transform 1.6s ease-in-out;
}

.elevator-door.left {
  left: 0;
  border-right: 2px solid #999;
}

.elevator-door.right {
  right: 0;
  border-left: 2px solid #999;
}

#elevatorOverlay.open .left {
  transform: translateX(-100%);
}

#elevatorOverlay.open .right {
  transform: translateX(100%);
}

#floorText {
  position: absolute;
  left: 50%;
  top: 44%;
  transform: translate(-50%, -50%);
  font-size: clamp(48px, 10vw, 120px);
  font-weight: bold;
  color: #d6ae6d;
}

#viewer {
  position: fixed;
  inset: 0;
  z-index: 90;
  background: rgba(0,0,0,0.92);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

#viewer.hidden {
  display: none;
}

#viewer img {
  max-width: 88vw;
  max-height: 76vh;
  border: 10px solid #111;
  box-shadow: 0 0 60px rgba(255,255,255,0.2);
}

#viewerTitle {
  margin-top: 18px;
  font-size: 18px;
  color: #d6ae6d;
}

#closeViewer {
  position: fixed;
  top: 22px;
  right: 28px;
  font-size: 34px;
  background: none;
  border: 0;
  color: white;
  cursor: pointer;
}

#artHint {
  position: fixed;
  left: 50%;
  bottom: 180px;
  transform: translateX(-50%);
  z-index: 70;
  padding: 14px 22px;
  border-radius: 18px;
  background: rgba(8, 8, 10, 0.82);
  backdrop-filter: blur(12px);
  text-align: center;
  box-shadow: 0 12px 36px rgba(0,0,0,0.45);
  border: 1px solid rgba(214,174,109,0.35);
}

#artHint.hidden {
  display: none;
}

#artHintTitle {
  color: #d6ae6d;
  font-weight: bold;
  margin-bottom: 4px;
}

#artHintText {
  font-size: 13px;
  opacity: 0.78;
}

@media (max-width: 768px) {
  #hud {
    grid-template-columns: 1fr;
    height: auto;
    gap: 4px;
    padding: 12px 16px;
  }

  .title,
  .hint {
    display: none;
  }

  .brand {
    font-size: 13px;
  }

#iceCreamCounter {
  position: fixed;
  left: 20px;
  top: 90px;

  background: rgba(255,255,255,0.9);

  padding: 10px 16px;

  border-radius: 12px;

  font-weight: bold;

  color: #444;

  z-index: 1000;

  box-shadow: 0 4px 16px rgba(0,0,0,.25);
}
#completeMessage {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000000;
}

#completeMessage.hidden {
  display: none;
}

.completeBox {
  background: rgba(255,255,255,0.95);
  color: #333;
  padding: 28px 36px;
  border-radius: 24px;
  text-align: center;
  box-shadow: 0 12px 40px rgba(0,0,0,0.35);
  border: 3px solid #ffd36e;
}

.completeBox h2 {
  margin: 0 0 10px;
  color: #ff6aa8;
}
}