:root {
  --bg-url: url("images/templobby.jpg");
  --ui-white: rgba(255, 255, 255, 0.95);
}

html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
  overflow: hidden; /* requirement: no scrolling */
  background: #000;
  overscroll-behavior: none;
}

body {
  width: 100%;
  touch-action: manipulation;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.stage {
  position: relative;
  width: 100vw;
  height: 100vh;

  background-image: var(--bg-url);
  background-repeat: no-repeat;
  background-size: cover; /* crop responsively from center */
  background-position: center center;

  display: block;
}

.enter-btn {
  position: absolute;
  left: 50%;
  /* Doors are centered in the lower half of the lobby image. */
  top: 67%;
  transform: translate(-50%, -50%);
  z-index: 2;

  padding: 20px 60px;
  border-radius: 24px;
  border: 1px solid rgba(255, 210, 145, 0.45);
  background: rgba(20, 10, 0, 0.14);
  color: var(--ui-white);
  backdrop-filter: blur(12px) saturate(1.25);
  -webkit-backdrop-filter: blur(12px) saturate(1.25);

  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  font-weight: 800;
  font-size: clamp(18px, 2.6vw, 26px);
  letter-spacing: 0.26em;
  text-indent: 0.26em; /* keeps ENTER visually centered with letter spacing */
  text-transform: uppercase;

  cursor: pointer;

  /* warm integrated glow */
  box-shadow:
    0 0 18px rgba(255, 170, 70, 0.22),
    0 0 48px rgba(255, 120, 40, 0.12);
  overflow: hidden;

  transition:
    transform 220ms ease,
    box-shadow 220ms ease,
    background 220ms ease,
    border-color 220ms ease;
  text-shadow: 0 0 18px rgba(255, 180, 80, 0.35), 0 2px 10px rgba(0, 0, 0, 0.25);
}

.enter-btn::before {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0.65;
  background: radial-gradient(
    circle at 50% 25%,
    rgba(255, 210, 145, 0.28) 0%,
    rgba(255, 170, 70, 0.08) 35%,
    rgba(0, 0, 0, 0) 70%
  );
  transition: opacity 220ms ease;
}

.enter-btn::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0.35;
  background: linear-gradient(
    to bottom,
    rgba(255, 255, 255, 0.16),
    rgba(255, 255, 255, 0)
  );
}

.enter-btn:hover {
  background: rgba(35, 18, 5, 0.18);
  border-color: rgba(255, 225, 170, 0.62);
  box-shadow:
    0 0 22px rgba(255, 185, 90, 0.46),
    0 0 60px rgba(255, 130, 50, 0.22);
  transform: translate(-50%, -50%) scale(1.01);
}

.enter-btn:hover::before {
  opacity: 0.92;
}

.enter-btn:active {
  transform: translate(-50%, -50%) scale(0.99);
  box-shadow:
    0 0 18px rgba(255, 190, 100, 0.38),
    0 0 48px rgba(255, 140, 55, 0.16);
}

.enter-btn:focus-visible {
  outline: none;
  border-color: rgba(255, 230, 190, 0.75);
  box-shadow:
    0 0 22px rgba(255, 185, 90, 0.46),
    0 0 60px rgba(255, 130, 50, 0.22);
}

.construction-wrap {
  position: absolute;
  left: 50%;
  top: 76%;
  transform: translateX(-50%);
  z-index: 2;
}

.construction-sign {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  font-size: clamp(11px, 1.25vw, 15px);
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;

  padding: 10px 18px;
  border-radius: 14px;
  border: 1px solid rgba(255, 210, 145, 0.42);
  background: rgba(10, 6, 0, 0.18);
  color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px) saturate(1.2);
  -webkit-backdrop-filter: blur(10px) saturate(1.2);
  text-shadow:
    0 0 16px rgba(255, 180, 80, 0.32),
    0 0 2px rgba(0, 0, 0, 0.35);

  box-shadow: 0 0 0 rgba(255, 255, 255, 0);
  animation: signPulse 2.6s ease-in-out infinite alternate;
}

@keyframes signPulse {
  from {
    box-shadow: 0 0 0 rgba(255, 190, 110, 0);
  }
  to {
    box-shadow:
      0 0 18px rgba(255, 190, 110, 0.22),
      0 0 46px rgba(255, 130, 50, 0.10);
  }
}

.enter-message {
  position: absolute;
  left: 50%;
  top: 67%;
  transform: translate(-50%, -50%);
  z-index: 3;
  pointer-events: none;

  opacity: 0;
  transition: opacity 320ms ease, transform 320ms ease;

  color: rgba(255, 255, 255, 0.95);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: clamp(12px, 2vw, 18px);
  text-shadow: 0 0 28px rgba(255, 255, 255, 0.25);
}

.veil {
  position: absolute;
  inset: 0;
  z-index: 4;
  pointer-events: none;

  background: rgba(0, 0, 0, 0.62);
  opacity: 0;
  transition: opacity 700ms ease;
}

body.is-entering .enter-btn {
  opacity: 0;
  transform: translate(-50%, -50%) scale(0.98);
  transition: opacity 220ms ease, transform 220ms ease;
}

body.is-entering .enter-message {
  opacity: 1;
  transform: translate(-50%, -52%);
}

body.is-entering .veil {
  opacity: 1;
}

/* Fine-tune vertical placement for very narrow layouts. */
@media (max-aspect-ratio: 3/4) {
  .enter-btn {
    top: 64%;
  }
  .enter-message {
    top: 64%;
  }
  .construction-wrap {
    top: 73%;
  }
}