*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: #000;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: #ccc;
}

#scene-canvas {
  display: block;
  width: 100%;
  height: 100%;
  cursor: grab;
}

#scene-canvas:active {
  cursor: grabbing;
}

/* ---------- Loading overlay ---------- */

#loading-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #0a0a0a;
  transition: opacity 0.8s ease, visibility 0.8s ease;
}

#loading-overlay.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ---------- Landing video background ---------- */

#landing-video {
  position: absolute;
  top: 50%;
  left: 32%;
  transform: translate(-50%, -50%);
  min-width: 100%;
  min-height: 100%;
  width: auto;
  height: auto;
  object-fit: cover;
  z-index: 0;
  opacity: 0;
  transition: opacity 1.2s ease;
}

#landing-video.visible {
  opacity: 1;
}

.landing-vignette {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(ellipse at 32% 50%, transparent 25%, #0a0a0a 70%);
}

/* ---------- Landing page ---------- */

.landing-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 520px;
  padding: 2rem;
  animation: fadeUp 0.8s ease both;
}

.landing-bio {
  font-size: 1.15rem;
  line-height: 1.7;
  letter-spacing: 0.02em;
  color: #fff;
  margin-bottom: 2.4rem;
  font-weight: 300;
  mix-blend-mode: difference;
}

#enter-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.7rem 2.2rem;
  font-family: inherit;
  font-size: 0.85rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #fff;
  background: transparent;
  border: 1px solid #fff;
  border-radius: 4px;
  cursor: pointer;
  mix-blend-mode: difference;
  transition: background 0.3s, border-color 0.3s, color 0.3s;
}

#enter-btn:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.15);
  border-color: #fff;
  color: #fff;
}

#enter-btn.loading {
  cursor: default;
  color: #555;
}

#enter-btn.loading .btn-text {
  color: #555;
}

.btn-spinner {
  display: none;
  width: 14px;
  height: 14px;
  border: 2px solid #333;
  border-top-color: #888;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}

#enter-btn.loading .btn-spinner {
  display: block;
}

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

/* ---------- Mobile reticle ---------- */

#mobile-reticle {
  position: fixed;
  top: 46%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 40;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

#mobile-reticle.hidden {
  display: none;
}

#mobile-reticle.active svg circle {
  stroke: rgba(255, 255, 255, 0.9);
}

/* ---------- Controls hint ---------- */

#controls-hint {
  position: fixed;
  top: 1.2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 50;
  padding: 0.6rem 1.4rem;
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  backdrop-filter: blur(6px);
  font-size: 0.8rem;
  color: #999;
  pointer-events: none;
  opacity: 1;
  transition: opacity 0.4s ease;
}

#controls-hint.fade-out {
  opacity: 0;
}

.hint-mobile { display: none; }

@media (pointer: coarse) {
  .hint-desktop { display: none; }
  .hint-mobile { display: block; }
}

kbd {
  display: inline-block;
  padding: 0.15em 0.45em;
  font-family: inherit;
  font-size: 0.85em;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 4px;
  color: #ddd;
}

/* ---------- Lab UI controls ---------- */

#lab-ui {
  position: fixed;
  top: 1.2rem;
  right: 1.2rem;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  opacity: 0;
  transition: opacity 0.5s ease;
  pointer-events: none;
}

#lab-ui.visible {
  opacity: 1;
  pointer-events: auto;
}

#sound-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem;
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  backdrop-filter: blur(6px);
  color: #999;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

#sound-toggle:hover {
  background: rgba(0, 0, 0, 0.75);
  color: #ddd;
}

#gyro-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem;
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  backdrop-filter: blur(6px);
  color: #999;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
}

#gyro-toggle:hover,
#gyro-toggle.active {
  background: rgba(0, 0, 0, 0.75);
  color: #ddd;
}

#gyro-toggle.active {
  border-color: rgba(255, 255, 255, 0.25);
}

#cv-link {
  display: inline-flex;
  align-items: center;
  padding: 0.6rem 1.4rem;
  font-family: inherit;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  line-height: 18px;
  text-decoration: none;
  color: #999;
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 8px;
  backdrop-filter: blur(6px);
  transition: background 0.2s, color 0.2s;
}

#cv-link:hover {
  background: rgba(0, 0, 0, 0.75);
  color: #ddd;
}

/* ---------- Mobile layout overrides ---------- */

@media (pointer: coarse) {
  #controls-hint {
    left: 1.2rem;
    right: auto;
    transform: none;
    max-width: 52vw;
    font-size: 0.7rem;
    padding: 0.5rem 0.8rem;
  }

  #lab-ui {
    flex-direction: column;
    align-items: flex-end;
    gap: 0.4rem;
  }

  #cv-link {
    font-size: 0.7rem;
    padding: 0.5rem 0.8rem;
  }
}