:root {
  --bg-deep: #07090c;
  --bg-surface: #11151a;
  --bg-glass: rgba(16, 22, 28, 0.46);
  --stroke: rgba(255, 255, 255, 0.2);
  --text-main: #f2f5f7;
  --text-muted: #adbac7;
  --accent: #b9d0e6;
  --ease: cubic-bezier(0.2, 0.65, 0.25, 1);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  font-family: "Manrope", sans-serif;
  color: var(--text-main);
  background: radial-gradient(circle at 15% 10%, #1b232b 0%, #07090c 55%);
}

#grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.18;
  mix-blend-mode: soft-light;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='280' height='280' viewBox='0 0 140 140'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Ccircle cx='10' cy='12' r='1'/%3E%3Ccircle cx='52' cy='40' r='1'/%3E%3Ccircle cx='79' cy='18' r='1'/%3E%3Ccircle cx='96' cy='96' r='1'/%3E%3Ccircle cx='128' cy='66' r='1'/%3E%3C/g%3E%3C/svg%3E");
}

#hero,
#experience {
  position: fixed;
  inset: 0;
}

#hero {
  z-index: 4;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(9, 12, 15, 0.88), rgba(5, 8, 10, 0.65));
  transition: opacity 1000ms var(--ease), visibility 1000ms var(--ease), transform 1000ms var(--ease);
}

#hero:not(.visible) {
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px) scale(1.01);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 70% 35%, rgba(255, 255, 255, 0.1), transparent 45%);
}

.hero-content {
  z-index: 1;
  width: min(740px, 90vw);
  text-align: center;
  padding: 2rem;
  animation: reveal-up 1200ms var(--ease) both;
}

.eyebrow {
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1rem;
  font-size: 0.78rem;
}

h1 {
  margin: 0;
  font-family: "Haas Grot Text Trial", sans-serif;
  font-size: clamp(2.2rem, 6vw, 5rem);
  font-weight: 800;
  line-height: 1.03;
  text-wrap: balance;
}

.subtitle {
  margin: 1rem 0 2rem;
  font-size: clamp(1rem, 2.2vw, 1.35rem);
  color: var(--accent);
}

.cta {
  border: 1px solid var(--stroke);
  background: linear-gradient(145deg, rgba(207, 226, 242, 0.2), rgba(200, 220, 236, 0.04));
  color: var(--text-main);
  padding: 0.9rem 1.6rem;
  font-size: 0.94rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 300ms var(--ease), border-color 300ms var(--ease), box-shadow 300ms var(--ease);
}

.cta:hover {
  transform: translateY(-2px);
  border-color: rgba(255, 255, 255, 0.45);
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.42);
}

#experience {
  z-index: 2;
}

#scene-canvas {
  width: 100%;
  height: 100%;
  display: block;
  background: radial-gradient(circle at 10% 5%, #1a222a 0%, #090c10 65%);
}

.overlay-card {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(420px, 86vw);
  padding: 1.4rem;
  border: 1px solid var(--stroke);
  border-radius: 16px;
  background: rgba(7, 10, 13, 0.76);
  backdrop-filter: blur(12px);
  z-index: 7;
  text-align: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 350ms var(--ease), visibility 350ms var(--ease);
}

.overlay-card.visible {
  opacity: 1;
  visibility: visible;
}

.progress-track {
  height: 7px;
  border-radius: 999px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.08);
  margin-top: 0.75rem;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, #ecf4fc, #a8bfd4);
  transition: width 220ms ease;
}

#progress-text {
  display: inline-block;
  margin-top: 0.62rem;
  color: var(--text-muted);
}

.ui-shell {
  position: absolute;
  inset: 0;
  z-index: 6;
  pointer-events: none;
  transition: opacity 420ms var(--ease);
}

.ui-shell.ui-hidden {
  opacity: 0;
}

.glass {
  pointer-events: auto;
  border: 1px solid var(--stroke);
  background: var(--bg-glass);
  backdrop-filter: blur(14px);
  border-radius: 14px;
}

.top-bar {
  position: absolute;
  top: 1rem;
  left: 1rem;
  right: 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem 1rem;
  animation: reveal-down 900ms var(--ease) 80ms both;
}

.title-block h2 {
  margin: 0;
  font-family: "Syne", sans-serif;
  font-size: clamp(1.1rem, 2.2vw, 1.4rem);
}

.title-block p {
  margin: 0.1rem 0 0;
  font-size: 0.84rem;
  color: var(--text-muted);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: flex-end;
}

.ghost-btn,
.panel-toggle {
  border: 1px solid var(--stroke);
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.02);
  border-radius: 999px;
  padding: 0.48rem 0.8rem;
  font-size: 0.76rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background 220ms ease, transform 220ms ease;
}

.ghost-btn:hover,
.panel-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-1px);
}

.controls-hint {
  position: absolute;
  top: 5.8rem;
  right: 1rem;
  width: 190px;
  padding: 0.75rem;
  font-size: 0.78rem;
  animation: reveal-down 900ms var(--ease) 180ms both;
}

.controls-hint p {
  margin: 0.32rem 0;
  color: var(--text-muted);
}

#hotspot-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

#mobile-controls {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 7;
  display: none;
}

.touch-pad {
  position: absolute;
  left: 1rem;
  bottom: calc(1rem + env(safe-area-inset-bottom, 0px));
  width: 104px;
  height: 104px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: rgba(7, 10, 13, 0.5);
  backdrop-filter: blur(10px);
  pointer-events: auto;
  touch-action: none;
}

.touch-thumb {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 42px;
  height: 42px;
  transform: translate(-50%, -50%);
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  background: rgba(255, 255, 255, 0.14);
}

.mobile-popup {
  position: absolute;
  left: 50%;
  bottom: calc(8.4rem + env(safe-area-inset-bottom, 0px));
  transform: translateX(-50%);
  width: min(92vw, 420px);
  border: 1px solid var(--stroke);
  background: rgba(7, 10, 13, 0.8);
  border-radius: 12px;
  padding: 0.7rem 0.85rem;
  text-align: center;
  font-size: 0.78rem;
  color: var(--text-muted);
  opacity: 0;
  visibility: hidden;
  transition: opacity 260ms var(--ease), visibility 260ms var(--ease);
}

.mobile-popup.visible {
  opacity: 1;
  visibility: visible;
}

.hotspot-btn {
  position: absolute;
  pointer-events: auto;
  transform: translate(-50%, -50%);
  border: 1px solid rgba(255, 255, 255, 0.45);
  color: var(--text-main);
  background: rgba(13, 18, 23, 0.56);
  border-radius: 999px;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.4rem 0.62rem;
  opacity: 0;
  transition: opacity 320ms var(--ease), transform 320ms var(--ease), background 250ms ease;
}

.hotspot-btn.visible {
  opacity: 1;
}

.hotspot-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translate(-50%, -54%);
}

.lift-btn-label {
  position: absolute;
  pointer-events: none;
  transform: translate(-50%, -50%);
  min-width: 1.6rem;
  padding: 0.24rem 0.46rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 180, 110, 0.6);
  background: rgba(15, 11, 8, 0.72);
  color: #ffb067;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-align: center;
  text-transform: uppercase;
  opacity: 0;
  transition: opacity 200ms var(--ease), transform 200ms var(--ease), box-shadow 200ms var(--ease);
}

.lift-btn-label.visible {
  opacity: 1;
}

.lift-btn-label.floor-btn.active {
  color: #ffe8cf;
  border-color: rgba(255, 164, 73, 0.95);
  background: rgba(54, 24, 8, 0.9);
  box-shadow: 0 0 0 1px rgba(255, 176, 103, 0.45), 0 0 18px rgba(255, 138, 48, 0.35);
  transform: translate(-50%, -53%);
}

.lift-panel-overlay {
  position: absolute;
  pointer-events: none;
  transform: translate(-50%, -50%);
  min-width: 3.6rem;
  padding: 0.34rem 0.52rem;
  border-radius: 0.62rem;
  border: 1px solid rgba(255, 151, 47, 0.7);
  background: rgba(8, 6, 4, 0.82);
  color: #ffac5c;
  text-align: center;
  opacity: 0;
  transition: opacity 180ms var(--ease), transform 180ms var(--ease), box-shadow 180ms var(--ease);
}

.lift-panel-overlay.visible {
  opacity: 1;
  box-shadow: 0 6px 22px rgba(0, 0, 0, 0.35);
}

.lift-panel-main {
  font-size: 1.05rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: 0.04em;
}

.lift-panel-sub {
  margin-top: 0.14rem;
  min-height: 0.68rem;
  font-size: 0.62rem;
  font-weight: 700;
  color: #ffd8ab;
  letter-spacing: 0.09em;
}

.lift-panel-overlay.arrow-up .lift-panel-sub,
.lift-panel-overlay.arrow-down .lift-panel-sub {
  color: #ffbe7e;
}

.bottom-wrap {
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.7rem;
}

.info-panel {
  width: min(520px, 100%);
  padding: 1rem;
  transform-origin: bottom left;
  transition: transform 320ms var(--ease), opacity 320ms var(--ease);
}

.info-panel.auto-fade {
  opacity: 0;
  transition: transform 320ms var(--ease), opacity 10s linear;
}

.info-panel.collapsed {
  transform: translateY(16px) scale(0.98);
  opacity: 0;
  pointer-events: none;
}

.info-card {
  display: none;
  animation: slide-in 420ms var(--ease) both;
}

.info-card.active {
  display: block;
}

.info-card h3 {
  margin: 0 0 0.35rem;
  font-family: "Syne", sans-serif;
}

.info-card p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.5;
}

.interaction-prompt {
  position: fixed;
  left: 50%;
  bottom: 2rem;
  transform: translateX(-50%);
  z-index: 8;
  border: 1px solid var(--stroke);
  background: rgba(7, 10, 13, 0.72);
  backdrop-filter: blur(10px);
  border-radius: 999px;
  padding: 0.62rem 0.95rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  opacity: 1;
  transition: opacity 260ms var(--ease);
}

.interaction-prompt.hidden {
  opacity: 0;
}

@keyframes reveal-up {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes reveal-down {
  from {
    opacity: 0;
    transform: translateY(-12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slide-in {
  from {
    opacity: 0;
    transform: translateX(12px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@media (max-width: 900px) {
  .top-bar {
    flex-direction: column;
    align-items: flex-start;
    left: 0.7rem;
    right: 0.7rem;
    top: 0.7rem;
    padding: 0.62rem 0.72rem;
    gap: 0.55rem;
  }

  .controls-hint {
    display: none;
  }

  .bottom-wrap {
    left: 0.7rem;
    right: 0.7rem;
    bottom: calc(8.1rem + env(safe-area-inset-bottom, 0px));
    gap: 0.55rem;
    pointer-events: auto;
  }

  .info-panel {
    width: 100%;
    max-height: min(24vh, 180px);
    overflow: auto;
    padding: 0.8rem;
  }

  .panel-toggle {
    font-size: 0.68rem;
    padding: 0.42rem 0.68rem;
  }

  .hotspot-btn {
    font-size: 0.72rem;
    padding: 0.5rem 0.76rem;
  }

  #mobile-controls {
    display: block;
  }
}

@media (max-width: 900px) and (orientation: portrait) {
  .actions {
    width: 100%;
    justify-content: flex-start;
  }

  .ghost-btn,
  .panel-toggle {
    font-size: 0.68rem;
    padding: 0.46rem 0.68rem;
  }

  .interaction-prompt {
    max-width: calc(100vw - 1.3rem);
    text-align: center;
    font-size: 0.76rem;
    bottom: calc(8rem + env(safe-area-inset-bottom, 0px));
  }
}

@media (max-width: 680px) {
  .actions {
    width: 100%;
    justify-content: flex-start;
  }

  .bottom-wrap {
    left: 0.7rem;
    right: 0.7rem;
    bottom: calc(8.4rem + env(safe-area-inset-bottom, 0px));
  }

  .info-panel {
    width: 100%;
    max-height: min(23vh, 170px);
  }
}