/* ==========================================================================
   TRUE 3D SPATIAL WORLD STYLESHEET (Three.js WebGL Engine)
   Aesthetic: Japanese Sumi-e Ink, Echizen Washi Paper, Vermilion Lacquer
   ========================================================================== */

/* 1. WebGL Container & Canvas */
.webgl-container {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1;
  pointer-events: none;
  overflow: hidden;
  background: transparent;
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), z-index 0.3s;
}

#webgl-canvas {
  width: 100%;
  height: 100%;
  display: block;
  outline: none;
  cursor: default;
}

body.mode-3d-fullscreen #webgl-canvas {
  cursor: grab;
}

body.mode-3d-fullscreen #webgl-canvas:active {
  cursor: grabbing;
}

/* 2. Spatial 3D HUD Overlay */
.webgl-hud-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 25;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: calc(5rem + var(--sat, 0px)) 2.5rem calc(1.5rem + var(--sab, 0px)) 2.5rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

body.mode-3d-fullscreen .webgl-hud-overlay {
  opacity: 1;
  visibility: visible;
  padding-top: calc(1.5rem + var(--sat, 0px));
}

/* Top / Zone Indicator Pill */
.webgl-hud-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.webgl-zone-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.45rem 1rem;
  background: rgba(247, 245, 240, 0.88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(26, 26, 26, 0.12);
  border-radius: 999px;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.04);
  font-family: var(--font-mono, monospace);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--gray-800, #2a2a2a);
  pointer-events: auto;
  transition: all 0.4s var(--ease-out-expo, cubic-bezier(0.16, 1, 0.3, 1));
}

.webgl-zone-pill:hover {
  background: rgba(255, 255, 255, 0.96);
  border-color: rgba(200, 16, 46, 0.3);
  box-shadow: 0 6px 22px rgba(200, 16, 46, 0.12);
}

.webgl-zone-pill .pill-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent, #c8102e);
  box-shadow: 0 0 8px rgba(200, 16, 46, 0.6);
  animation: pulseDot 2.2s infinite ease-in-out;
}

@keyframes pulseDot {
  0%, 100% { transform: scale(1); opacity: 0.9; }
  50% { transform: scale(1.3); opacity: 0.5; }
}

.webgl-zone-pill .zone-label {
  font-size: 0.65rem;
  color: var(--gray-500, #808080);
  font-weight: 600;
  text-transform: uppercase;
}

.webgl-zone-pill .zone-name {
  font-weight: 700;
  color: var(--black, #0a0a0a);
}

/* Bottom Controls & Navigation Bar */
.webgl-hud-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 1.5rem;
}

/* Controls Hint */
.webgl-controls-hint {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.4rem 0.9rem;
  background: rgba(247, 245, 240, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(26, 26, 26, 0.1);
  border-radius: 999px;
  font-family: var(--font-mono, monospace);
  font-size: 0.68rem;
  color: var(--gray-700, #404040);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
}

.webgl-controls-hint .hint-key {
  display: inline-block;
  padding: 0.12rem 0.45rem;
  background: var(--black, #0a0a0a);
  color: var(--white, #ffffff);
  border-radius: 4px;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.webgl-controls-hint .hint-desc {
  letter-spacing: 0.04em;
}

/* 3D Room Quick Teleport Rail (Inside HUD) */
.webgl-room-rail {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  pointer-events: auto;
  background: rgba(247, 245, 240, 0.88);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  padding: 0.3rem 0.45rem;
  border-radius: 999px;
  border: 1px solid rgba(26, 26, 26, 0.12);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.05);
}

.webgl-rail-btn {
  background: transparent;
  border: none;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  font-family: var(--font-mono, monospace);
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--gray-600, #606060);
  cursor: pointer;
  transition: all 0.25s ease;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.webgl-rail-btn:hover {
  background: rgba(26, 26, 26, 0.08);
  color: var(--black, #0a0a0a);
}

.webgl-rail-btn.active {
  background: var(--black, #0a0a0a);
  color: var(--white, #ffffff);
}

.webgl-rail-btn[data-rail-zone="spotify"].active {
  background: #1db954;
  color: #ffffff;
  box-shadow: 0 0 14px rgba(29, 185, 84, 0.45);
}

.webgl-rail-btn[data-rail-zone="gaming"].active {
  background: #ff007f;
  color: #ffffff;
  box-shadow: 0 0 14px rgba(255, 0, 127, 0.45);
}

.webgl-rail-btn .rail-kanji {
  font-family: var(--font-jp, serif);
  font-size: 0.75rem;
}

/* Reset Perspective Button */
.webgl-reset-cam,
.webgl-tour-btn {
  pointer-events: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.95rem;
  background: rgba(247, 245, 240, 0.9);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(26, 26, 26, 0.12);
  border-radius: 999px;
  font-family: var(--font-mono, monospace);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--gray-800, #2a2a2a);
  cursor: pointer;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
  transition: all 0.3s var(--ease-out-expo, cubic-bezier(0.16, 1, 0.3, 1));
}

.webgl-reset-cam:hover,
.webgl-tour-btn:hover {
  background: var(--black, #0a0a0a);
  color: var(--white, #ffffff);
  border-color: var(--black, #0a0a0a);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.15);
}

.webgl-tour-btn.active {
  background: #961a14;
  color: #ffffff;
  border-color: #961a14;
  box-shadow: 0 0 14px rgba(150, 26, 20, 0.45);
}

.webgl-reset-cam .reset-icon {
  font-size: 0.75rem;
  transition: transform 0.4s ease;
}

.webgl-reset-cam:hover .reset-icon {
  transform: rotate(180deg);
}

/* Spatial Navigation Shortcuts Pills */
.webgl-spatial-shortcuts {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  pointer-events: auto;
}

.spatial-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.65rem;
  background: rgba(247, 245, 240, 0.85);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(26, 26, 26, 0.1);
  border-radius: 999px;
  font-family: var(--font-mono, monospace);
  font-size: 0.62rem;
  font-weight: 600;
  color: var(--gray-700, #404040);
}

.spatial-badge kbd {
  background: var(--black, #0a0a0a);
  color: var(--white, #ffffff);
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  font-size: 0.58rem;
  font-weight: 700;
}

.webgl-exit-3d-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.35rem 0.85rem;
  background: rgba(247, 245, 240, 0.94);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(200, 16, 46, 0.38);
  border-radius: 999px;
  font-family: var(--font-mono, monospace);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent, #c8102e);
  cursor: pointer;
  box-shadow: 0 2px 10px rgba(200, 16, 46, 0.12);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: auto;
}

.webgl-exit-3d-btn:hover {
  background: var(--accent, #c8102e);
  color: #ffffff;
  border-color: var(--accent, #c8102e);
  box-shadow: 0 4px 18px rgba(200, 16, 46, 0.35);
  transform: translateY(-1px);
}

.webgl-exit-3d-btn .exit-btn-icon {
  font-size: 0.75rem;
  font-weight: 800;
  line-height: 1;
}

.webgl-exit-3d-btn .exit-btn-kbd {
  display: inline-block;
  padding: 0.08rem 0.35rem;
  background: rgba(200, 16, 46, 0.12);
  border: 1px solid rgba(200, 16, 46, 0.25);
  border-radius: 3px;
  font-size: 0.58rem;
  font-family: var(--font-mono, monospace);
  font-weight: 700;
  color: inherit;
  transition: all 0.25s ease;
}

.webgl-exit-3d-btn:hover .exit-btn-kbd {
  background: rgba(255, 255, 255, 0.25);
  border-color: rgba(255, 255, 255, 0.4);
  color: #ffffff;
}

/* 3. Hero 3D Enter CTA Button */
.hero-3d-enter-wrapper {
  margin-top: 1.25rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
  z-index: 15;
}

.hero-3d-enter-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.95rem;
  padding: 0.5rem 0.55rem 0.5rem 0.55rem;
  background: linear-gradient(135deg, #181512 0%, #0a0908 100%);
  color: #f8f6f0;
  border: 1px solid rgba(212, 175, 55, 0.55);
  border-radius: 100px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  box-shadow: 0 10px 28px -4px rgba(10, 8, 6, 0.35), 0 0 18px rgba(200, 16, 46, 0.18), inset 0 1px 0 rgba(255, 255, 255, 0.15);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  text-decoration: none;
}

.hero-3d-enter-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.18), transparent);
  transform: translateX(-100%);
  transition: transform 0.75s ease;
}

.hero-3d-enter-btn:hover::before {
  transform: translateX(100%);
}

.hero-3d-enter-btn:hover {
  background: linear-gradient(135deg, #241f1a 0%, #12100d 100%);
  border-color: rgba(212, 175, 55, 0.9);
  transform: translateY(-3px);
  box-shadow: 0 14px 38px -4px rgba(200, 16, 46, 0.35), 0 0 25px rgba(212, 175, 55, 0.35);
  color: #ffffff;
}

.hero-3d-enter-btn:active {
  transform: translateY(1px);
  box-shadow: 0 4px 12px rgba(200, 16, 46, 0.25);
}

.hero-3d-enter-btn .enter-btn-kanji {
  font-family: var(--font-jp, serif);
  font-size: 0.82rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  padding: 0.45rem 0.85rem;
  background: linear-gradient(135deg, #c8102e 0%, #8c1020 100%);
  color: #ffffff;
  border-radius: 100px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  box-shadow: 0 2px 8px rgba(200, 16, 46, 0.45);
  transition: all 0.3s ease;
}

.hero-3d-enter-btn:hover .enter-btn-kanji {
  background: linear-gradient(135deg, #e01538 0%, #a81226 100%);
  box-shadow: 0 4px 14px rgba(200, 16, 46, 0.6);
}

.hero-3d-enter-btn .enter-btn-label {
  font-family: var(--font-mono, monospace);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #fcfbfa;
  padding-left: 0.2rem;
}

.enter-btn-arrow-wrap {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(212, 175, 55, 0.4);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  color: #f7f4ee;
  margin-right: 0.2rem;
}

.hero-3d-enter-btn .enter-btn-arrow {
  font-size: 0.95rem;
  transition: transform 0.3s ease;
}

.hero-3d-enter-btn:hover .enter-btn-arrow-wrap {
  background: #c8102e;
  border-color: #c8102e;
  transform: translateX(3px);
  box-shadow: 0 0 10px rgba(200, 16, 46, 0.6);
}

.hero-3d-hint {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-mono, monospace);
  font-size: 0.65rem;
  color: var(--gray-500, #808080);
}

.hero-cta-button-row {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  flex-wrap: wrap;
}

.hero-contact-quick-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.72rem 1.25rem;
  background: rgba(247, 245, 240, 0.94);
  color: #1a1a1a;
  border: 1px solid rgba(26, 26, 26, 0.18);
  border-radius: 4px;
  cursor: pointer;
  font-family: var(--font-mono, monospace);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-decoration: none;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-contact-quick-btn:hover {
  background: #ffffff;
  border-color: var(--accent, #c8102e);
  color: var(--accent, #c8102e);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(200, 16, 46, 0.14);
}

.hero-contact-quick-btn .contact-btn-kanji {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 2px 6px;
  background: rgba(200, 16, 46, 0.08);
  color: var(--accent, #c8102e);
  border-radius: 3px;
  font-family: var(--font-jp, serif);
  font-size: 0.72rem;
}

.hero-3d-hint .kbd-pill {
  padding: 0.1rem 0.35rem;
  background: rgba(0, 0, 0, 0.06);
  border: 1px solid rgba(0, 0, 0, 0.12);
  border-radius: 3px;
  color: var(--gray-700, #404040);
  font-weight: 700;
  font-size: 0.6rem;
}

/* 4. Nav 3D Mode Toggle Button */
.nav-3d-btn {
  background: rgba(247, 245, 240, 0.8);
  border: 1px solid rgba(200, 16, 46, 0.3);
  color: var(--accent, #c8102e);
  font-weight: 700;
}

.nav-3d-btn:hover {
  background: var(--accent, #c8102e);
  color: #ffffff;
  border-color: var(--accent, #c8102e);
  box-shadow: 0 4px 14px rgba(200, 16, 46, 0.25);
}

.nav-3d-btn.active {
  background: var(--accent, #c8102e);
  color: #ffffff;
  border-color: var(--accent, #c8102e);
  box-shadow: 0 0 16px rgba(200, 16, 46, 0.4);
}

/* 5. Fullscreen Cinematic 3D Mode */
body.mode-3d-fullscreen {
  overflow: hidden !important;
}

body.mode-3d-fullscreen .hero {
  pointer-events: none;
}

body.mode-3d-fullscreen .hero-left,
body.mode-3d-fullscreen .hero-right,
body.mode-3d-fullscreen .center-divider,
body.mode-3d-fullscreen .cross-deco {
  opacity: 0 !important;
  transform: scale(0.96);
  pointer-events: none !important;
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-left,
.hero-right,
.center-divider,
.cross-deco {
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

body.mode-3d-fullscreen .webgl-container {
  z-index: 500;
  pointer-events: auto;
}

/* Doors Opened State */
body.doors-opened .hero-3d-enter-btn {
  background: rgba(200, 16, 46, 0.15);
  border-color: var(--accent, #c8102e);
  color: var(--accent, #c8102e);
}

body.doors-opened .hero-3d-enter-btn .enter-btn-kanji {
  background: var(--accent, #c8102e);
  color: #ffffff;
}

body.doors-opened .hero-3d-enter-btn .enter-btn-label {
  content: 'DOORS OPEN // EXPLORING';
}

/* 6. Responsive Tuning */
@media (max-width: 900px) {
  .webgl-hud-overlay {
    padding: calc(1.2rem + var(--sat, 0px)) 1rem calc(1rem + var(--sab, 0px)) 1rem;
  }

  body.mode-3d-fullscreen .webgl-hud-overlay {
    padding-top: calc(1rem + var(--sat, 0px));
  }
  
  .webgl-hud-bottom {
    flex-direction: column;
    align-items: flex-end;
    gap: 0.65rem;
    pointer-events: none;
  }

  .webgl-room-rail {
    display: flex;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    max-width: 100%;
    gap: 0.35rem;
    padding: 0.3rem 0.6rem;
    background: rgba(22, 19, 16, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(212, 175, 55, 0.35);
    border-radius: 999px;
    pointer-events: auto;
  }
  .webgl-room-rail::-webkit-scrollbar {
    display: none;
  }

  .webgl-rail-btn {
    padding: 0.35rem 0.65rem;
    font-size: 0.62rem;
    flex-shrink: 0;
  }

  .webgl-controls-hint {
    align-self: center;
    font-size: 0.6rem;
    padding: 0.3rem 0.75rem;
    pointer-events: auto;
  }

  .hero-3d-enter-btn .enter-btn-label {
    font-size: 0.7rem;
  }

  .webgl-spatial-shortcuts {
    display: none;
  }
}

/* 7. 3D Interactive Hover Reticle & Tooltip */
.webgl-interaction-reticle {
  position: fixed;
  pointer-events: none;
  z-index: 35;
  transform: translate(-50%, -50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.25s ease;
}

body.mode-3d-fullscreen .webgl-interaction-reticle.visible {
  opacity: 1;
  visibility: visible;
}

.reticle-ring {
  width: 32px;
  height: 32px;
  border: 1.5px solid var(--accent, #c8102e);
  border-radius: 50%;
  box-shadow: 0 0 14px rgba(200, 16, 46, 0.4);
  animation: reticlePulse 1.8s infinite ease-in-out;
  position: relative;
}

.reticle-ring::before {
  content: '';
  position: absolute;
  inset: 50%;
  width: 4px;
  height: 4px;
  transform: translate(-50%, -50%);
  background: var(--accent, #c8102e);
  border-radius: 50%;
}

@keyframes reticlePulse {
  0%, 100% { transform: scale(1); opacity: 0.9; }
  50% { transform: scale(1.22); opacity: 0.5; }
}

.reticle-label {
  padding: 0.3rem 0.75rem;
  background: rgba(247, 245, 240, 0.94);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(200, 16, 46, 0.35);
  border-radius: 999px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  font-family: var(--font-mono, monospace);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--black, #0a0a0a);
  white-space: nowrap;
  text-transform: uppercase;
}

/* 8. Top Right HUD Strip with Compass & Shortcuts */
.webgl-hud-top-right {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  pointer-events: auto;
}

/* 9. Spatial Compass Rose (方位磁石) */
.webgl-compass {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.3rem 0.75rem;
  background: rgba(247, 245, 240, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(26, 26, 26, 0.12);
  border-radius: 999px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
  user-select: none;
}

.compass-dial {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1.5px solid rgba(26, 26, 26, 0.2);
  position: relative;
  background: radial-gradient(circle, #fffdfa 0%, #f0eae1 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.compass-cardinal {
  position: absolute;
  font-family: var(--font-jp, serif);
  font-size: 0.45rem;
  font-weight: 700;
  color: var(--gray-600, #666666);
  line-height: 1;
}

.compass-cardinal.n { top: 1px; color: var(--accent, #c8102e); }
.compass-cardinal.e { right: 2px; }
.compass-cardinal.s { bottom: 1px; }
.compass-cardinal.w { left: 2px; }

.compass-needle {
  width: 2px;
  height: 18px;
  position: absolute;
  top: 5px;
  left: 13px;
  background: linear-gradient(to bottom, #c8102e 50%, #1a1a1a 50%);
  border-radius: 1px;
  transform-origin: center center;
  transition: transform 0.1s linear;
}

.compass-readout {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.compass-deg {
  font-family: var(--font-mono, monospace);
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--black, #0a0a0a);
  letter-spacing: 0.06em;
}

.compass-sub {
  font-family: var(--font-mono, monospace);
  font-size: 0.5rem;
  color: var(--gray-500, #808080);
  letter-spacing: 0.1em;
}

/* 10. HUD Action Buttons (Time-of-Day, Sound, Tour) */
.webgl-hud-btn {
  pointer-events: auto;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.85rem;
  background: rgba(247, 245, 240, 0.9);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(26, 26, 26, 0.12);
  border-radius: 999px;
  font-family: var(--font-mono, monospace);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--gray-800, #2a2a2a);
  cursor: pointer;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
  transition: all 0.3s var(--ease-out-expo, cubic-bezier(0.16, 1, 0.3, 1));
}

.webgl-hud-btn:hover {
  background: var(--black, #0a0a0a);
  color: var(--white, #ffffff);
  border-color: var(--black, #0a0a0a);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.15);
}

.webgl-hud-btn.active {
  background: #961a14;
  color: #ffffff;
  border-color: #961a14;
  box-shadow: 0 0 14px rgba(150, 26, 20, 0.45);
}

/* 11. Diegetic In-Scene Inspection Modal */
.webgl-diegetic-modal {
  position: fixed;
  top: 5.5rem;
  right: 2.5rem;
  width: 360px;
  max-width: calc(100vw - 3rem);
  z-index: 45;
  pointer-events: auto;
  opacity: 0;
  visibility: hidden;
  transform: translateX(30px) scale(0.96);
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.webgl-diegetic-modal.active {
  opacity: 1;
  visibility: visible;
  transform: translateX(0) scale(1);
}

.diegetic-modal-panel {
  background: rgba(248, 244, 236, 0.94);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1.5px solid rgba(26, 26, 26, 0.15);
  border-radius: 6px;
  padding: 1.6rem 1.4rem;
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.14), 0 4px 12px rgba(200, 16, 46, 0.08);
  position: relative;
  overflow: hidden;
}

.diegetic-modal-panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #c8102e, #e67e22, #c8102e);
}

.diegetic-close-btn {
  position: absolute;
  top: 0.9rem;
  right: 1.0rem;
  background: transparent;
  border: none;
  font-size: 1.1rem;
  color: var(--gray-600, #666666);
  cursor: pointer;
  transition: color 0.2s ease, transform 0.2s ease;
  line-height: 1;
}

.diegetic-close-btn:hover {
  color: var(--accent, #c8102e);
  transform: scale(1.15);
}

.diegetic-badge-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.75rem;
}

.diegetic-seal {
  width: 24px;
  height: 24px;
  border: 1.5px solid #c8102e;
  color: #c8102e;
  font-family: var(--font-jp, serif);
  font-size: 0.75rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 2px;
}

.diegetic-code {
  font-family: var(--font-mono, monospace);
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--accent, #c8102e);
}

.diegetic-title {
  font-family: var(--font-serif, serif);
  font-size: 1.35rem;
  font-weight: 900;
  color: var(--black, #0a0a0a);
  line-height: 1.25;
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.diegetic-desc {
  font-size: 0.82rem;
  line-height: 1.55;
  color: var(--gray-700, #404040);
  margin-bottom: 1.2rem;
}

.diegetic-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  padding: 0.75rem;
  background: rgba(26, 26, 26, 0.04);
  border-radius: 4px;
  border: 1px dashed rgba(26, 26, 26, 0.15);
  margin-bottom: 1.25rem;
}

.d-metric {
  display: flex;
  flex-direction: column;
}

.d-val {
  font-family: var(--font-mono, monospace);
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--black, #0a0a0a);
}

.d-lbl {
  font-family: var(--font-mono, monospace);
  font-size: 0.55rem;
  color: var(--gray-600, #707070);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.diegetic-actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.diegetic-action-btn {
  width: 100%;
  padding: 0.65rem 1.0rem;
  font-family: var(--font-mono, monospace);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.25s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
}

.diegetic-action-btn.primary {
  background: #1c1916;
  color: #ffffff;
  border: 1px solid #1c1916;
}

.diegetic-action-btn.primary:hover {
  background: var(--accent, #c8102e);
  border-color: var(--accent, #c8102e);
  transform: translateY(-1px);
}

.diegetic-action-btn.secondary {
  background: transparent;
  color: var(--black, #0a0a0a);
  border: 1px solid rgba(26, 26, 26, 0.2);
}

.diegetic-action-btn.secondary:hover {
  background: rgba(26, 26, 26, 0.06);
  border-color: var(--black, #0a0a0a);
}

/* 12. Architectural Washi Minimap Modal (境内絵図) */
.webgl-minimap-modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.94);
  z-index: 50;
  pointer-events: auto;
  opacity: 0;
  visibility: hidden;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.webgl-minimap-modal.active {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, -50%) scale(1);
}

.minimap-panel {
  background: rgba(248, 244, 236, 0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1.5px solid rgba(26, 26, 26, 0.2);
  border-radius: 8px;
  padding: 1.5rem;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.2), 0 4px 16px rgba(200, 16, 46, 0.1);
  position: relative;
  width: 380px;
  max-width: calc(100vw - 2.5rem);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.minimap-panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #961a14, #d4af37, #961a14);
  border-radius: 8px 8px 0 0;
}

.minimap-close-btn {
  position: absolute;
  top: 0.85rem;
  right: 1.0rem;
  background: transparent;
  border: none;
  font-size: 1.1rem;
  color: var(--gray-600, #666666);
  cursor: pointer;
  transition: color 0.2s ease, transform 0.2s ease;
  line-height: 1;
}

.minimap-close-btn:hover {
  color: var(--accent, #c8102e);
  transform: scale(1.15);
}

.minimap-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  width: 100%;
  margin-bottom: 1.0rem;
}

.minimap-seal {
  width: 28px;
  height: 28px;
  border: 1.5px solid #961a14;
  color: #961a14;
  font-family: var(--font-jp, serif);
  font-size: 0.9rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 2px;
  flex-shrink: 0;
}

.minimap-title {
  font-family: var(--font-serif, serif);
  font-size: 0.92rem;
  font-weight: 900;
  color: var(--black, #0a0a0a);
  letter-spacing: 0.04em;
  margin: 0;
}

.minimap-subtitle {
  font-family: var(--font-mono, monospace);
  font-size: 0.6rem;
  color: var(--gray-600, #666666);
  letter-spacing: 0.08em;
  margin: 0.15rem 0 0 0;
}

.minimap-canvas-container {
  width: 320px;
  height: 320px;
  max-width: 100%;
  border-radius: 4px;
  border: 1px solid rgba(26, 26, 26, 0.15);
  background: #ede3d1;
  box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.06);
  overflow: hidden;
  margin-bottom: 1.0rem;
}

#minimap-radar-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.minimap-legend {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.45rem;
  width: 100%;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.5rem;
  background: rgba(26, 26, 26, 0.04);
  border: 1px solid rgba(26, 26, 26, 0.1);
  border-radius: 4px;
  font-family: var(--font-mono, monospace);
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--gray-800, #2a2a2a);
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.legend-item:hover {
  background: var(--black, #0a0a0a);
  color: #ffffff;
  border-color: var(--black, #0a0a0a);
  transform: translateY(-1px);
}

.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

@media (max-width: 900px) {
  .webgl-compass {
    display: none;
  }
}

/* ==========================================================================
   RETURN TO 3D SANCTUARY FLOATING BRIDGING BUTTON
   Allows instant, direct return from any overlay to the exact 3D spatial zone
   ========================================================================== */
.return-to-3d-btn {
  position: fixed;
  top: 1.6rem;
  left: 2.2rem;
  z-index: 105;
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.55rem 1.25rem;
  background: rgba(247, 245, 240, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1.5px solid rgba(26, 26, 26, 0.18);
  border-radius: 999px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08), 0 1px 4px rgba(0, 0, 0, 0.04);
  font-family: var(--font-mono, monospace);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  color: #1a1a1a;
  cursor: pointer;
  pointer-events: auto;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  user-select: none;
}

.return-to-3d-btn:hover {
  background: #1a1a1a;
  color: #f7f5f0;
  border-color: #1a1a1a;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.18), 0 0 14px rgba(200, 16, 46, 0.25);
}

.return-to-3d-btn:active {
  transform: translateY(0);
}

.return-to-3d-btn .btn-shrine-icon {
  font-size: 1.05rem;
  line-height: 1;
  color: #c8102e;
  transition: transform 0.3s ease;
}

.return-to-3d-btn:hover .btn-shrine-icon {
  transform: scale(1.22) rotate(-6deg);
}

.return-to-3d-btn .btn-zone-tag {
  font-size: 0.62rem;
  padding: 0.18rem 0.48rem;
  border-radius: 4px;
  background: rgba(200, 16, 46, 0.1);
  color: #c8102e;
  letter-spacing: 0.06em;
  font-weight: 800;
  transition: all 0.3s ease;
}

.return-to-3d-btn:hover .btn-zone-tag {
  background: rgba(255, 255, 255, 0.2);
  color: #ffffff;
}

@media (max-width: 768px) {
  .return-to-3d-btn {
    top: 1rem;
    left: 1rem;
    padding: 0.45rem 0.85rem;
    font-size: 0.65rem;
  }
  .return-to-3d-btn .btn-text {
    display: none;
  }
}

/* 3D Lazy Loading Indicator */
.spatial-lazy-indicator {
  position: fixed;
  top: 5rem;
  right: 2rem;
  z-index: 10001;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px) scale(0.96);
  transition: opacity 0.35s cubic-bezier(0.16, 1, 0.3, 1), transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), visibility 0.35s;
}

.spatial-lazy-indicator.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.lazy-badge-card {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  background: rgba(22, 19, 16, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid rgba(212, 175, 55, 0.5);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4), 0 0 18px rgba(212, 175, 55, 0.2);
  padding: 0.7rem 1.25rem;
  border-radius: 9999px;
  color: #f5ede0;
}

.lazy-badge-kanji {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background: #c8102e;
  color: #fff;
  font-family: var(--font-jp, serif);
  font-size: 0.9rem;
  font-weight: 700;
  border-radius: 4px;
}

.lazy-badge-body {
  display: flex;
  flex-direction: column;
}

.lazy-badge-title {
  font-family: var(--font-mono, monospace);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: #d4af37;
}

.lazy-badge-sub {
  font-size: 0.68rem;
  color: #a89f91;
  font-family: var(--font-sans, sans-serif);
}

.lazy-badge-spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(212, 175, 55, 0.25);
  border-top-color: #d4af37;
  border-radius: 50%;
  animation: lazySpin 0.8s linear infinite;
}

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

@media (max-width: 768px) {
  .spatial-lazy-indicator {
    top: auto;
    bottom: 2rem;
    left: 50%;
    right: auto;
    transform: translate(-50%, 15px) scale(0.96);
  }
  .spatial-lazy-indicator.active {
    transform: translate(-50%, 0) scale(1);
  }
}

/* ==========================================================================
   MOBILE TOUCH VIRTUAL JOYSTICK & MOVEMENT CONTROLS
   ========================================================================== */
.webgl-touch-controls {
  position: absolute;
  bottom: calc(1.5rem + var(--sab, 0px));
  left: 1.25rem;
  z-index: 40;
  display: none;
  align-items: flex-end;
  gap: 0.75rem;
  pointer-events: auto;
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
}

body.mode-3d-fullscreen .webgl-touch-controls {
  display: flex;
}

/* Hide on desktop devices with fine mouse pointer unless <= 900px */
@media (min-width: 901px) and (hover: hover) and (pointer: fine) {
  body.mode-3d-fullscreen .webgl-touch-controls {
    display: none;
  }
}

.joystick-base {
  position: relative;
  width: 104px;
  height: 104px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(30, 26, 22, 0.85) 0%, rgba(14, 12, 10, 0.94) 100%);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1.5px solid rgba(212, 175, 55, 0.45);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5), inset 0 0 15px rgba(212, 175, 55, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  touch-action: none;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
  cursor: grab;
}

.joystick-base.touch-active {
  border-color: rgba(200, 16, 46, 0.8);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.6), 0 0 20px rgba(200, 16, 46, 0.35), inset 0 0 18px rgba(200, 16, 46, 0.2);
  cursor: grabbing;
}

.joystick-guide-arrow {
  position: absolute;
  font-size: 0.55rem;
  color: rgba(212, 175, 55, 0.5);
  pointer-events: none;
  line-height: 1;
}

.joystick-guide-arrow.up { top: 7px; left: 50%; transform: translateX(-50%); }
.joystick-guide-arrow.down { bottom: 7px; left: 50%; transform: translateX(-50%); }
.joystick-guide-arrow.left { left: 7px; top: 50%; transform: translateY(-50%); }
.joystick-guide-arrow.right { right: 7px; top: 50%; transform: translateY(-50%); }

.joystick-stick {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #423830 0%, #1a1614 70%, #0d0b0a 100%);
  border: 2px solid #c8102e;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.6), 0 0 10px rgba(200, 16, 46, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  will-change: transform;
  transition: transform 0.05s ease-out;
}

.joystick-base.touch-active .joystick-stick {
  transition: none;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.7), 0 0 16px rgba(200, 16, 46, 0.7);
}

.joystick-kanji {
  font-family: var(--font-jp, serif);
  font-size: 0.85rem;
  font-weight: 800;
  color: #ffcccc;
  text-shadow: 0 0 6px rgba(200, 16, 46, 0.8);
  pointer-events: none;
}

.touch-sprint-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(24, 20, 17, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1.5px solid rgba(255, 255, 255, 0.2);
  color: #c0b8ad;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.35);
  transition: all 0.25s ease;
  touch-action: manipulation;
  pointer-events: auto;
}

.touch-sprint-btn .sprint-icon {
  font-size: 0.95rem;
  line-height: 1;
}

.touch-sprint-btn .sprint-label {
  font-family: var(--font-mono, monospace);
  font-size: 0.52rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  line-height: 1;
  margin-top: 2px;
}

.touch-sprint-btn.active {
  background: #c8102e;
  border-color: #ff6666;
  color: #ffffff;
  box-shadow: 0 0 16px rgba(200, 16, 46, 0.7);
  transform: scale(1.08);
}