@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700;800&family=Cinzel:wght@700&family=JetBrains+Mono:wght@400;600&display=swap');

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

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: 'Inter', sans-serif;
  cursor: none;
  background: #030712;
}

/* ── Twinkling Sky Backdrop ── */
#star-canvas, #balcony-star-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

/* ── Custom Glow Cursor ── */
#cur {
  position: fixed;
  width: 14px;
  height: 14px;
  background: rgba(56, 189, 248, 0.25);
  border: 1.5px solid #38bdf8;
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: width 0.2s, height 0.2s, background 0.2s, border-color 0.2s;
  box-shadow: 0 0 8px rgba(56, 189, 248, 0.3);
}
#cur.hovered {
  width: 32px;
  height: 32px;
  background: rgba(56, 189, 248, 0.15);
  border-color: #fbbf24;
  box-shadow: 0 0 15px rgba(251, 191, 36, 0.4);
}

/* ── 3D Viewport Stage ── */
.sc {
  position: fixed;
  inset: 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.8s ease-in-out;
  z-index: 1;
  perspective: 1100px;
  perspective-origin: 50% 45%;
  overflow: hidden;
  background: #03050a;
}
.sc.on {
  opacity: 1;
  pointer-events: auto;
  z-index: 2;
}

/* ── 3D Room Box ── */
.room-3d {
  position: absolute;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 1.2s cubic-bezier(0.25, 1, 0.4, 1);
  transform-origin: 50% 50% -450px;
  will-change: transform;
}

/* ── Cuboid Wall System ── */
.room-wall {
  position: absolute;
  transform-style: preserve-3d;
  backface-visibility: hidden;
  background-color: #070913;
  box-shadow: inset 0 0 60px rgba(0, 0, 0, 0.9);
}

/* Floor */
.room-wall.floor {
  width: 100vw;
  height: 900px;
  left: 0;
  bottom: 0;
  transform-origin: bottom center;
  transform: rotateX(90deg) translateZ(0);
  background: radial-gradient(circle at 50% 50%, #0d1222 0%, #03050a 100%);
  background-image: linear-gradient(rgba(56, 189, 248, 0.07) 1.5px, transparent 1.5px),
                    linear-gradient(90deg, rgba(56, 189, 248, 0.07) 1.5px, transparent 1.5px);
  background-size: 70px 70px;
  border-top: 3px solid rgba(56, 189, 248, 0.15);
}

/* Ceiling */
.room-wall.ceiling {
  width: 100vw;
  height: 900px;
  left: 0;
  top: 0;
  transform-origin: top center;
  transform: rotateX(-90deg) translateZ(0);
  background: #05070e;
  background-image: linear-gradient(rgba(56, 189, 248, 0.03) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(56, 189, 248, 0.03) 1px, transparent 1px);
  background-size: 90px 90px;
  border-bottom: 3px solid rgba(56, 189, 248, 0.15);
}

/* Left Wall */
.room-wall.left {
  width: 900px;
  height: 100vh;
  left: 0;
  top: 0;
  transform-origin: left center;
  transform: rotateY(90deg) translateZ(0);
  background: linear-gradient(to right, #030408, #0b0f20);
  border-right: 3px solid rgba(56, 189, 248, 0.15);
}

/* Right Wall */
.room-wall.right {
  width: 900px;
  height: 100vh;
  right: 0;
  top: 0;
  transform-origin: right center;
  transform: rotateY(-90deg) translateZ(0);
  background: linear-gradient(to left, #030408, #0b0f20);
  border-left: 3px solid rgba(56, 189, 248, 0.15);
}

/* Back Wall */
.room-wall.back {
  width: 100vw;
  height: 100vh;
  left: 0;
  top: 0;
  transform: translateZ(-900px);
  background: #020306;
}

/* ── Exterior Landing Page ── */
#ext {
  background: linear-gradient(to bottom, #041024 0%, #0c2042 60%, #152d59 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
}
.ground {
  position: absolute;
  bottom: 0;
  inset-inline: 0;
  height: 25%;
  background: linear-gradient(to bottom, #1b3d16, #0f240d);
  border-top: 2px solid #285422;
  z-index: 1;
}
.path {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 140px;
  height: 25%;
  background: linear-gradient(to bottom, #6b5c49, #42382c);
  clip-path: polygon(35% 0%, 65% 0%, 100% 100%, 0% 100%);
  box-shadow: inset 0 0 10px rgba(0,0,0,0.5);
  z-index: 2;
}
.house-wrap {
  position: relative;
  z-index: 3;
  margin-bottom: 18vh;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.house-sign {
  font-family: 'Cinzel', serif;
  font-size: 2.1rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: 0.16em;
  text-align: center;
  text-shadow: 0 0 10px rgba(56, 189, 248, 0.7), 0 0 20px rgba(56, 189, 248, 0.4);
  margin-bottom: 0.2rem;
}
.house-welcome {
  font-family: 'Inter', sans-serif;
  font-size: 0.76rem;
  font-weight: 700;
  color: #38bdf8;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  text-align: center;
  margin-bottom: 1.6rem;
  opacity: 0.95;
  text-shadow: 0 0 8px rgba(56, 189, 248, 0.4);
}
.sign-flicker {
  animation: neonFlicker 4s infinite alternate;
}
@keyframes neonFlicker {
  0%, 19%, 21%, 23%, 25%, 54%, 56%, 100% {
    opacity: 1;
    text-shadow: 0 0 10px rgba(56, 189, 248, 0.7), 0 0 20px rgba(56, 189, 248, 0.4);
  }
  20%, 24%, 55% {
    opacity: 0.5;
    text-shadow: none;
  }
}
.house-svg {
  width: min(650px, 86vw);
  filter: drop-shadow(0 20px 50px rgba(0,0,0,0.85));
}
.win-glow {
  filter: drop-shadow(0 0 10px #f59e0b) drop-shadow(0 0 22px #d97706);
}

/* ── Landing Page Tech Equipments ── */
.solar-panel-array {
  filter: drop-shadow(0 0 8px rgba(56, 189, 248, 0.4));
}
.roof-satellite {
  filter: drop-shadow(0 0 4px rgba(255,255,255,0.15));
}
.satellite-signal {
  animation: satellitePulse 1.6s infinite alternate ease-in-out;
}
@keyframes satellitePulse {
  0% { fill: #38bdf8; filter: drop-shadow(0 0 2px #38bdf8); }
  100% { fill: #ef4444; filter: drop-shadow(0 0 8px #ef4444); }
}
@keyframes spinTurbine {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
.wind-turbine {
  filter: drop-shadow(0 4px 8px rgba(0,0,0,0.5));
}

/* ── Neighbor Houses ── */
.neighbor-house {
  cursor: pointer;
  pointer-events: auto;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}
.neighbor-house:hover {
  filter: drop-shadow(0 0 15px #38bdf8);
}
.neighbor-house:hover .nh-win {
  fill: #38bdf8;
  filter: drop-shadow(0 0 6px #38bdf8);
  transition: fill 0.3s, filter 0.3s;
}
.nh-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  fill: #8ba8cc;
  font-weight: 700;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
}
.neighbor-house:hover .nh-label {
  opacity: 1;
}

.person-neighbor {
  cursor: pointer;
  transition: transform 0.2s;
}
.person-neighbor:hover {
  transform: translate(-100px, 305px) scale(1.1);
}
.chat-popup {
  opacity: 1;
  pointer-events: none;
  animation: floatPopup 2s ease-in-out infinite;
}
@keyframes floatPopup {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

/* ── Responsive Quick Nav Panel ── */
.quick-nav-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 1.5rem;
  z-index: 10;
  width: 100%;
  max-width: 600px;
  padding: 0 1rem;
}
.qn-btn {
  background: rgba(15, 23, 42, 0.75);
  border: 1.5px solid rgba(56, 189, 248, 0.4);
  color: #f8fafc;
  padding: 0.6rem 1.2rem;
  border-radius: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(8px);
  -webkit-tap-highlight-color: transparent;
  flex: 1 1 auto;
  min-width: 110px;
}
.qn-btn:hover {
  background: #38bdf8;
  color: #0f172a;
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(56, 189, 248, 0.4);
}
.qn-btn:active {
  transform: translateY(1px) scale(0.96);
  box-shadow: 0 2px 8px rgba(56, 189, 248, 0.4);
}

/* ── Proximity Room Actions Overlay ── */
.action-prompt {
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translate(-50%, -40%);
  background: rgba(15, 23, 42, 0.88);
  backdrop-filter: blur(14px);
  border: 2px solid #38bdf8;
  border-radius: 12px;
  padding: 1.2rem 2.2rem;
  color: #f8fafc;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  z-index: 110;
  box-shadow: 0 10px 40px rgba(56, 189, 248, 0.35), 0 0 25px rgba(56, 189, 248, 0.15);
  pointer-events: auto;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s cubic-bezier(0.25, 1, 0.5, 1), transform 0.35s cubic-bezier(0.25, 1, 0.5, 1), visibility 0.35s;
  text-align: center;
}
.action-prompt.show {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, -50%);
}
.prompt-btn {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.76rem;
  font-weight: 800;
  color: #030712;
  background: #38bdf8;
  border: none;
  border-radius: 6px;
  padding: 8px 16px;
  cursor: pointer;
  letter-spacing: 0.05em;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 12px rgba(56, 189, 248, 0.25);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.prompt-btn:hover {
  background: #ffffff;
  color: #0f172a;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(255, 255, 255, 0.45);
}
.prompt-btn:active {
  transform: translateY(1px) scale(0.96);
  box-shadow: 0 2px 8px rgba(56, 189, 248, 0.4);
}
.prompt-btn:active {
  transform: translateY(0);
}

/* ── Hallway First-Person Controls ── */
.hallway-nav-panel {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 100;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(16px);
  border: 1.5px solid rgba(56, 189, 248, 0.2);
  border-radius: 12px;
  padding: 8px 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  transition: opacity 0.3s ease;
}
.nav-control-btn {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-weight: 700;
  color: #cbd5e1;
  background: rgba(30, 41, 59, 0.7);
  border: 1.5px solid rgba(255, 255, 255, 0.08);
  border-radius: 6px;
  padding: 7px 14px;
  cursor: pointer;
  letter-spacing: 0.06em;
  transition: all 0.2s ease;
  user-select: none;
}
.nav-control-btn:hover {
  background: #38bdf8;
  color: #0f172a;
  border-color: #38bdf8;
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.4);
}
.nav-control-btn:active {
  transform: scale(0.95);
}

.enter-hint {
  color: #8ba8cc;
  font-size: 0.8rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  margin-top: 1.2rem;
  animation: floatHint 2.4s ease-in-out infinite;
}
@keyframes floatHint {
  0%, 100% { transform: translateY(0); opacity: 0.5; }
  50% { transform: translateY(-6px); opacity: 1; }
}

/* ── Hallway Elements & Equipment ── */
.hall-carpet {
  width: 280px;
  height: 100%;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(90deg, #7f1d1d, #450a0a);
  box-shadow: 0 0 25px rgba(0,0,0,0.7);
  border-left: 2px dashed #b91c1c;
  border-right: 2px dashed #b91c1c;
}
.wall-sconce {
  position: absolute;
  width: 12px;
  height: 24px;
  background: #334155;
  border-radius: 3px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.4);
}
.wall-sconce::after {
  content: '';
  position: absolute;
  top: -12px;
  left: -8px;
  width: 28px;
  height: 28px;
  background: radial-gradient(circle, #f59e0b 15%, rgba(245,158,11,0.3) 45%, transparent 75%);
  border-radius: 50%;
  animation: sconceGlow 2.5s infinite alternate ease-in-out;
}
@keyframes sconceGlow {
  0% { transform: scale(0.9); opacity: 0.75; }
  100% { transform: scale(1.1); opacity: 1; }
}
.sconce-l1 { left: 240px; top: 12vh; }
.sconce-l2 { left: 600px; top: 12vh; }
.sconce-r1 { left: 240px; top: 12vh; }
.sconce-r2 { left: 600px; top: 12vh; }

.mirror {
  position: absolute;
  left: 410px;
  top: 25vh;
  width: 70px;
  height: 110px;
  background: linear-gradient(135deg, #38bdf8, #0369a1);
  border: 5px solid #451a03;
  border-radius: 35px;
  box-shadow: 0 10px 20px rgba(0,0,0,0.5), inset 0 0 12px rgba(255,255,255,0.35);
}
.painting {
  position: absolute;
  left: 410px;
  top: 27vh;
  width: 85px;
  height: 65px;
  background: linear-gradient(45deg, #fbbf24, #b45309);
  border: 4px solid #1e293b;
  box-shadow: 0 10px 20px rgba(0,0,0,0.5);
}
.hallway-end-window {
  position: absolute;
  left: 50%;
  top: 5vh;
  transform: translateX(-50%);
  width: 220px;
  height: 120px;
  background: linear-gradient(to bottom, #020617, #0f172a);
  border: 6px solid #1e293b;
  border-radius: 4px;
}

/* Doors Styling (Realistic Tall Human-Scale Doors) */
.room-wall .dr {
  position: absolute;
  width: 170px;
  height: 380px;
  bottom: 0;
  background: linear-gradient(180deg, #4d2b12, #291507);
  border: 4px solid #b45309;
  border-bottom: none; /* Touches floor junction flat */
  border-radius: 12px 12px 0 0;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding: 1.5rem 0.6rem;
  box-shadow: 0 16px 30px rgba(0,0,0,0.8);
  transition: all 0.35s cubic-bezier(0.25, 1, 0.5, 1);
  transform-style: preserve-3d;
}
.room-wall .dr::after {
  content: '';
  position: absolute;
  inset: 12px 12px 50px;
  border: 1.5px solid rgba(180, 83, 9, 0.2);
  border-radius: 4px;
  pointer-events: none;
}
.room-wall .dr:hover {
  border-color: #fbbf24;
  box-shadow: 0 0 35px rgba(251, 191, 36, 0.45), 0 16px 30px rgba(0,0,0,0.7);
  transform: translateZ(12px);
}
.dr-left-1 { left: 140px; }
.dr-left-2 { left: 520px; }
.dr-right-1 { left: 140px; }
.dr-right-2 { left: 520px; }
.dr-back { left: 50%; bottom: 0; transform: translateX(-50%); }

.dr-icon {
  font-size: 2.8rem;
  margin-top: 1.5rem;
  filter: drop-shadow(0 4px 6px rgba(0,0,0,0.4));
}
.dr-plate {
  background: linear-gradient(135deg, #fbbf24, #b45309);
  border: 1.5px solid #d97706;
  border-radius: 4px;
  padding: 0.4rem 0.8rem;
  margin-top: 2rem;
  box-shadow: 0 4px 8px rgba(0,0,0,0.4);
}
.dr-name {
  font-family: 'Cinzel', serif;
  font-size: 0.74rem;
  color: #0f172a;
  font-weight: 800;
  letter-spacing: 0.08em;
  white-space: nowrap;
}
.dr-knob {
  width: 13px;
  height: 13px;
  background: radial-gradient(circle at 35% 35%, #fbbf24, #b45309);
  border-radius: 50%;
  position: absolute;
  bottom: 120px;
  right: 18px;
  box-shadow: 0 3px 6px rgba(0,0,0,0.5);
}

.dr.exit-dr {
  border-color: #ef4444;
  background: linear-gradient(180deg, #6b1818, #3b0a0a);
}
.dr.exit-dr .dr-plate {
  background: linear-gradient(135deg, #ef4444, #991b1b);
  border-color: #b91c1c;
}
.dr.exit-dr .dr-name {
  color: #ffffff;
}
.dr.exit-dr:hover {
  box-shadow: 0 0 35px rgba(239, 68, 68, 0.45);
}

.hall-overlay-title {
  position: absolute;
  top: 6vh;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  pointer-events: none;
  z-index: 10;
}
.hall-overlay-title h2 {
  font-family: 'Cinzel', serif;
  color: #fbbf24;
  font-size: 1.1rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
}
.hall-overlay-title p {
  color: #64748b;
  font-size: 0.72rem;
  margin-top: 0.4rem;
  letter-spacing: 0.1em;
}

/* ── Dynamic Room Base static bar ── */
.room-bar-static {
  position: absolute;
  top: 0;
  inset-inline: 0;
  display: flex;
  align-items: center;
  padding: 1rem 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  gap: 1.5rem;
  background: rgba(3, 5, 10, 0.85);
  backdrop-filter: blur(8px);
  z-index: 100;
}
.back-btn {
  background: transparent;
  border: 1.5px solid rgba(251, 191, 36, 0.3);
  color: #fbbf24;
  padding: 0.4rem 0.95rem;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s;
  font-family: inherit;
}
.back-btn:hover {
  background: rgba(251, 191, 36, 0.06);
  border-color: #fbbf24;
  box-shadow: 0 0 10px rgba(251, 191, 36, 0.2);
}
.room-ttl {
  font-family: 'Cinzel', serif;
  color: #fbbf24;
  font-size: 1.15rem;
  letter-spacing: 0.15em;
}
.room-hint {
  margin-left: auto;
  font-size: 0.7rem;
  color: #64748b;
  letter-spacing: 0.05em;
}

/* ── 3D Projects Showcase (Bus Topology Room) ── */
.bus-scene-3d {
  width: 100%;
  height: 100%;
  position: absolute;
  transform-style: preserve-3d;
  transition: transform 0.6s cubic-bezier(0.25, 1, 0.5, 1);
}
.ceiling-bus-wire {
  position: absolute;
  left: 50%;
  top: 0;
  width: 3px;
  height: 100%;
  background: #fbbf24;
  box-shadow: 0 0 15px rgba(251, 191, 36, 0.8);
}
.server-rack {
  position: absolute;
  width: 180px;
  height: 380px;
  background: linear-gradient(135deg, #1e293b, #0f172a);
  border: 4px solid #334155;
  box-shadow: 0 20px 40px rgba(0,0,0,0.6);
  border-radius: 6px;
}
.server-rack::after {
  content: 'RACK A-1';
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.6rem;
  color: #ef4444;
  font-family: 'JetBrains Mono', monospace;
}
.fw-3d {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  transform-style: preserve-3d;
  cursor: pointer;
  transition: transform 0.3s;
}
.string-3d {
  width: 2px;
  background: #fbbf24;
  box-shadow: 0 0 8px rgba(251, 191, 36, 0.7);
}
.frame-3d {
  width: 170px;
  background: linear-gradient(135deg, #182235, #080d16);
  border: 3px solid #b45309;
  border-radius: 8px;
  padding: 1rem;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.8);
  transform-style: preserve-3d;
  transition: all 0.3s;
}
.fw-3d:hover .frame-3d {
  border-color: #fbbf24;
  box-shadow: 0 20px 45px rgba(251, 191, 36, 0.3), 0 0 15px rgba(251,191,36,0.1);
  transform: scale(1.04);
}
.f-icon-3d {
  font-size: 2.2rem;
  text-align: center;
  margin-bottom: 0.5rem;
}
.f-title-3d {
  font-size: 0.76rem;
  font-weight: 700;
  color: #f1f5f9;
  text-align: center;
  margin-bottom: 0.6rem;
  line-height: 1.35;
}
.f-tags-3d {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  justify-content: center;
}
.ftag-3d {
  font-size: 0.55rem;
  padding: 0.15rem 0.45rem;
  background: rgba(251, 191, 36, 0.08);
  border: 1px solid rgba(251, 191, 36, 0.2);
  color: #fbbf24;
  border-radius: 3px;
  font-family: 'JetBrains Mono', monospace;
}

/* Floating Tooltip */
.floating-tooltip {
  position: fixed;
  background: rgba(15, 23, 42, 0.95);
  border: 1.5px solid rgba(56, 189, 248, 0.35);
  border-radius: 8px;
  padding: 0.85rem 1.1rem;
  pointer-events: none;
  opacity: 0;
  z-index: 9999;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.65), 0 0 15px rgba(56, 189, 248, 0.15);
  transition: opacity 0.25s, transform 0.15s ease-out;
  max-width: 280px;
}
.floating-tooltip.show {
  opacity: 1;
}

/* ── Room Content Overlay (flat 2D panel above 3D room) ── */
.room-content-overlay {
  position: absolute;
  inset: 0;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3.5rem 2rem 2rem;
  overflow-y: auto;
  gap: 0.8rem;
  pointer-events: auto;
  transform-style: flat;
  background: rgba(3, 5, 10, 0.5);
}

/* ── Contact Bar (fixed back button bar for contact room) ── */
.contact-bar-static {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  padding: 0.6rem 1.2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  z-index: 20;
  background: rgba(3, 5, 10, 0.75);
  border-bottom: 1px solid rgba(56, 189, 248, 0.1);
}
.float-title {
  font-weight: 700;
  font-size: 0.85rem;
  color: #fbbf24;
  margin-bottom: 0.35rem;
}
.float-desc {
  font-size: 0.72rem;
  color: #cbd5e1;
  line-height: 1.45;
}
.float-hint {
  font-size: 0.6rem;
  color: #38bdf8;
  margin-top: 0.45rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ── Skills card grid ── */
.skills-back-title, .edu-back-title, .hobbies-back-title {
  font-family: 'Cinzel', serif;
  font-size: 1.4rem;
  color: #fbbf24;
  letter-spacing: 0.1em;
  margin-bottom: 0.2rem;
}
.skills-back-subtitle, .edu-back-subtitle, .hobbies-back-subtitle {
  font-size: 0.72rem;
  color: #64748b;
  font-family: 'JetBrains Mono', monospace;
  margin-bottom: 0.8rem;
  letter-spacing: 0.06em;
}
.skills-grid-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  justify-content: center;
  width: 100%;
  max-width: 720px;
}
.skill-cat-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-width: 140px;
}
.skill-cat-label {
  font-size: 0.6rem;
  font-family: 'JetBrains Mono', monospace;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: #475569;
  padding-bottom: 0.25rem;
  border-bottom: 1px solid #1e293b;
}
.skill-cat-items {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.skill-card {
  background: rgba(15, 23, 42, 0.8);
  border: 1.5px solid var(--color, #38bdf8);
  border-radius: 8px;
  padding: 0.5rem 0.9rem;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 0 10px rgba(0,0,0,0.4);
}
.skill-card:hover, .skill-card.hovered {
  background: var(--color, #38bdf8);
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 6px 20px var(--shadow, rgba(56,189,248,0.5));
}
.skill-card:hover .skill-card-name,
.skill-card.hovered .skill-card-name {
  color: #030712;
}
.skill-card:hover .skill-card-level,
.skill-card.hovered .skill-card-level {
  color: #0f172a;
}
.skill-card-name {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color, #38bdf8);
  font-family: 'JetBrains Mono', monospace;
  transition: color 0.2s;
}
.skill-card-level {
  font-size: 0.6rem;
  color: #64748b;
  margin-top: 0.1rem;
  transition: color 0.2s;
}

/* ── Education & Hobbies card grid ── */
.edu-cards-wrap, .hobbies-cards-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  justify-content: center;
  width: 100%;
  max-width: 720px;
}
.edu-card, .hobby-card {
  background: rgba(15, 23, 42, 0.8);
  border: 1.5px solid #38bdf8;
  border-radius: 8px;
  padding: 1rem 1.2rem;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 0 10px rgba(0,0,0,0.4);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}
.edu-card:hover, .hobby-card:hover {
  background: #38bdf8;
  transform: translateY(-2px) scale(1.03);
  box-shadow: 0 6px 20px rgba(56,189,248,0.5);
}
.edu-card:hover .edu-card-year, .edu-card:hover .edu-card-degree, .edu-card:hover .edu-card-school, .edu-card:hover .edu-card-score,
.hobby-card:hover .hobby-card-icon, .hobby-card:hover .hobby-card-label {
  color: #030712 !important;
}
.edu-card-year {
  font-size: 0.65rem;
  color: #64748b;
  font-family: 'JetBrains Mono', monospace;
  transition: color 0.2s;
}
.edu-card-degree {
  font-size: 0.9rem;
  font-weight: 700;
  color: #38bdf8;
  transition: color 0.2s;
}
.edu-card-school {
  font-size: 0.7rem;
  color: #cbd5e1;
  transition: color 0.2s;
}
.edu-card-score {
  font-size: 0.75rem;
  color: #fbbf24;
  font-weight: 600;
  transition: color 0.2s;
}
.hobby-card-icon {
  font-size: 2.5rem;
  margin-bottom: 0.3rem;
  transition: color 0.2s;
}
.hobby-card-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: #38bdf8;
  transition: color 0.2s;
}

/* ── Education Library Room (Bookshelf) ── */
.bookshelf-3d {
  width: min(580px, 92vw);
  height: 380px;
  background: linear-gradient(135deg, #1e1b4b, #0f172a);
  border: 8px solid #451a03;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.85);
  position: absolute;
  left: 50%;
  top: 10vh;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 1.5rem;
  border-radius: 6px;
}
.shelf-row {
  border-bottom: 8px solid #451a03;
  height: 155px;
  display: flex;
  justify-content: center;
  align-items: flex-end;
  gap: 1.8rem;
  width: 100%;
}
.edu-book-3d {
  width: 100px;
  height: 140px;
  background: linear-gradient(to right, #451a03, #78350f);
  border-left: 5px solid rgba(255, 255, 255, 0.08);
  border-radius: 4px 4px 0 0;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 0.9rem 0.65rem;
  box-shadow: 3px -3px 8px rgba(0,0,0,0.5);
  transition: transform 0.3s cubic-bezier(0.25, 1, 0.5, 1), box-shadow 0.3s;
}
.edu-book-3d.science {
  background: linear-gradient(to right, #064e3b, #065f46);
}
.edu-book-3d.see {
  background: linear-gradient(to right, #1e3a8a, #1e40af);
}
.edu-book-3d:hover {
  transform: translateZ(25px) translateY(-12px);
  box-shadow: 5px 12px 22px rgba(0,0,0,0.6);
}
.edu-book-3d.selected {
  transform: translateZ(35px) translateY(-15px) scale(1.02);
  border: 1px solid #fbbf24;
}

/* Desk Study Panel details */
.desk-study-panel {
  position: absolute;
  bottom: 8vh;
  left: 50%;
  transform: translateX(-50%);
  width: min(580px, 92vw);
  background: rgba(15, 23, 42, 0.82);
  border: 1.5px solid rgba(240, 192, 96, 0.25);
  border-radius: 8px;
  padding: 1.2rem;
  backdrop-filter: blur(8px);
  box-shadow: 0 10px 30px rgba(0,0,0,0.6);
  opacity: 0;
  transition: opacity 0.4s;
}
.desk-study-panel.active {
  opacity: 1;
}

/* ── Contact Balcony Scene ── */
.balcony-tiles {
  position: absolute;
  inset: 0;
  background-color: #0b0f19;
  background-image: radial-gradient(circle, #1e293b 10%, transparent 11%),
                    radial-gradient(circle, #1e293b 10%, transparent 11%);
  background-size: 40px 40px;
  background-position: 0 0, 20px 20px;
  box-shadow: inset 0 0 80px rgba(0,0,0,0.9);
}
.balcony-plant {
  position: absolute;
  left: 200px;
  bottom: 50px;
  font-size: 5rem;
}
.balcony-lantern-glowing {
  position: absolute;
  left: 450px;
  top: 15vh;
  font-size: 4rem;
  animation: lanternSway 3.5s infinite alternate ease-in-out;
  transform-origin: top center;
}
@keyframes lanternSway {
  0% { transform: rotate(-5deg); }
  100% { transform: rotate(5deg); }
}
.balcony-rail-3d {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: repeating-linear-gradient(90deg, #1e293b, #1e293b 10px, transparent 10px, transparent 40px);
  border-top: 10px solid #334155;
  border-bottom: 5px solid #0f172a;
}
.contact-box-3d {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) translateZ(2px);
  background: rgba(10, 15, 30, 0.85);
  border: 1.5px solid rgba(56, 189, 248, 0.25);
  padding: 2.2rem;
  border-radius: 12px;
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.8), 0 0 15px rgba(56, 189, 248, 0.1);
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Contact layout components */
.ct-title {
  font-family: 'Cinzel', serif;
  color: #38bdf8;
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-align: center;
  margin-bottom: 0.2rem;
}
.ct-sub {
  color: #64748b;
  font-size: 0.78rem;
  font-family: 'JetBrains Mono', monospace;
  margin-bottom: 1.1rem;
}
.ct-links {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  width: min(340px, 86vw);
  margin-bottom: 1.2rem;
}
.ctlnk {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.65rem 1.1rem;
  background: rgba(56, 189, 248, 0.04);
  border: 1px solid rgba(56, 189, 248, 0.12);
  border-radius: 6px;
  color: #94a3b8;
  font-size: 0.78rem;
  text-decoration: none;
  transition: all 0.25s;
}
.ctlnk:hover {
  color: #38bdf8;
  border-color: #38bdf8;
  background: rgba(56, 189, 248, 0.08);
  transform: translateX(6px);
}
.ct-btns {
  display: flex;
  gap: 0.8rem;
}
.ct-btn {
  padding: 0.55rem 1.4rem;
  border-radius: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  text-decoration: none;
  transition: all 0.25s;
}
.ct-btn-p {
  background: #38bdf8;
  color: #030712;
  border: none;
  box-shadow: 0 4px 15px rgba(56, 189, 248, 0.25);
}
.ct-btn-p:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(56, 189, 248, 0.4);
}
.ct-btn-g {
  background: transparent;
  border: 1px solid rgba(56, 189, 248, 0.35);
  color: #38bdf8;
}
.ct-btn-g:hover {
  background: rgba(56, 189, 248, 0.06);
  border-color: #38bdf8;
}
.ct-back {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid #475569;
  border-radius: 6px;
  color: #e2e8f0;
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.6rem 1.2rem;
  margin-top: 1.5rem;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.2s;
}
.ct-back:hover {
  background: #fbbf24;
  color: #030712;
  border-color: #fbbf24;
  box-shadow: 0 4px 12px rgba(251, 191, 36, 0.3);
}

/* ── Modal Design ── */
#modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
  background: rgba(3, 5, 10, 0.8);
  backdrop-filter: blur(8px);
}
#modal.show {
  opacity: 1;
  pointer-events: auto;
}
.modal-box {
  background: linear-gradient(135deg, #0f172a, #020617);
  border: 2.5px solid rgba(251, 191, 36, 0.2);
  border-radius: 12px;
  padding: 2.2rem;
  max-width: 460px;
  width: 90%;
  box-shadow: 0 25px 60px rgba(0,0,0,0.85);
  position: relative;
  transform: translateY(20px) scale(0.96);
  transition: transform 0.3s;
}
#modal.show .modal-box {
  transform: translateY(0) scale(1);
}
.modal-close {
  position: absolute;
  top: 0.9rem;
  right: 1.1rem;
  background: transparent;
  border: none;
  color: #64748b;
  font-size: 1.5rem;
  cursor: pointer;
  transition: color 0.2s;
}
.modal-close:hover {
  color: #fbbf24;
}
.modal-icon {
  font-size: 2.6rem;
  text-align: center;
  margin-bottom: 0.8rem;
}
.modal-title {
  font-size: 1.15rem;
  font-weight: 700;
  color: #f1f5f9;
  text-align: center;
  margin-bottom: 0.4rem;
}
.modal-desc {
  font-size: 0.82rem;
  color: #94a3b8;
  line-height: 1.6;
  text-align: center;
  margin-bottom: 1.2rem;
}
.modal-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  justify-content: center;
  margin-bottom: 1.4rem;
}
.modal-tag {
  padding: 0.25rem 0.65rem;
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.2);
  color: #38bdf8;
  border-radius: 100px;
  font-size: 0.68rem;
  font-family: 'JetBrains Mono', monospace;
}
.modal-link {
  display: block;
  text-align: center;
  padding: 0.6rem 1.4rem;
  background: #38bdf8;
  color: #030712;
  border-radius: 6px;
  font-weight: 700;
  font-size: 0.8rem;
  text-decoration: none;
  transition: all 0.25s;
  box-shadow: 0 4px 12px rgba(56, 189, 248, 0.25);
}
.modal-link:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(56, 189, 248, 0.4);
}

/* ── Chatbot UI ── */
.chatbot-wrap {
  position: fixed;
  inset: 0;
  z-index: 2100;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  background: rgba(3, 5, 10, 0.85);
  backdrop-filter: blur(8px);
  transition: opacity 0.3s;
}
.chatbot-wrap.show {
  opacity: 1;
  pointer-events: auto;
}
.chatbot-box {
  background: #0f172a;
  border: 2px solid #38bdf8;
  border-radius: 12px;
  width: 90%;
  max-width: 400px;
  height: 500px;
  display: flex;
  flex-direction: column;
  box-shadow: 0 25px 60px rgba(0,0,0,0.9), 0 0 20px rgba(56, 189, 248, 0.2);
  transform: translateY(20px) scale(0.96);
  transition: transform 0.3s;
  overflow: hidden;
}
.chatbot-wrap.show .chatbot-box {
  transform: translateY(0) scale(1);
}
.chat-header {
  background: #1e293b;
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid #334155;
}
.chat-header h4 {
  color: #38bdf8;
  font-size: 1rem;
  font-family: 'Cinzel', serif;
}
.chat-header button {
  background: transparent;
  border: none;
  color: #94a3b8;
  font-size: 1.5rem;
  cursor: pointer;
  transition: color 0.2s;
}
.chat-header button:hover {
  color: #fbbf24;
}
.chat-history {
  flex: 1;
  padding: 1rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}
.chat-msg {
  padding: 0.7rem 1rem;
  border-radius: 8px;
  font-size: 0.85rem;
  line-height: 1.5;
  max-width: 85%;
}
.bot-msg {
  background: #1e293b;
  color: #e2e8f0;
  align-self: flex-start;
  border-bottom-left-radius: 0;
}
.user-msg {
  background: #38bdf8;
  color: #030712;
  align-self: flex-end;
  border-bottom-right-radius: 0;
  font-weight: 600;
}
.chat-input-area {
  padding: 1rem;
  background: #1e293b;
  border-top: 1px solid #334155;
  display: flex;
  gap: 0.5rem;
}
.chat-input-area input {
  flex: 1;
  padding: 0.6rem;
  border-radius: 6px;
  border: 1px solid #475569;
  background: #0f172a;
  color: #f8fafc;
  outline: none;
  font-family: inherit;
}
.chat-input-area input:focus {
  border-color: #38bdf8;
}
.chat-input-area button {
  padding: 0.6rem 1.2rem;
  border-radius: 6px;
  border: none;
  background: #38bdf8;
  color: #0f172a;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s;
}
.chat-input-area button:hover {
  background: #fbbf24;
}

/* ═══════════════════════════════════════════════════════
   GRACEFUL DEGRADATION / MOBILE RESPONSIVENESS OVERRIDES
   ═══════════════════════════════════════════════════════ */
@media (max-width: 767px) {
  /* Flatten 3D PerspectiveStage */
  .sc {
    perspective: none;
    overflow-y: auto;
  }
  
  /* Disable 3D transforms */
  .room-3d {
    transform: none !important;
    transform-style: flat;
    display: flex;
    flex-direction: column;
    height: auto;
    overflow-y: auto;
    position: relative;
    padding-bottom: 2rem;
  }

  /* Make walls standard stacked blocks */
  .room-wall {
    position: relative !important;
    transform: none !important;
    width: 100% !important;
    height: auto !important;
    left: auto !important;
    right: auto !important;
    top: auto !important;
    bottom: auto !important;
    border: none !important;
    box-shadow: none !important;
    background: rgba(10, 15, 30, 0.8) !important;
    padding: 1.5rem !important;
    margin-bottom: 1rem;
    border-radius: 8px;
    border: 1px solid rgba(255,255,255,0.04) !important;
  }
  
  /* Hide unnecessary ceiling/floor decor */
  .floor-grid, .ceiling-lights, .hall-carpet, .hallway-end-window, .mirror, .painting {
    display: none !important;
  }

  /* 3D Hallway doors vertical grid stack */
  #hallway-box {
    padding: 6rem 1rem 2rem 1rem !important;
  }
  .room-wall.left, .room-wall.right, .room-wall.back {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    background: transparent !important;
    border: none !important;
    padding: 0 !important;
  }
  .room-wall .dr {
    position: relative !important;
    left: auto !important;
    right: auto !important;
    top: auto !important;
    transform: none !important;
    width: min(280px, 88vw) !important;
    height: 110px !important;
    flex-direction: row !important;
    align-items: center !important;
    justify-content: flex-start !important;
    gap: 1rem;
    padding: 1rem !important;
    border-radius: 8px !important;
  }
  .dr::after {
    inset: 4px !important;
  }
  .dr-icon {
    font-size: 2.5rem !important;
    margin-top: 0 !important;
  }
  .dr-plate {
    margin-bottom: 0 !important;
  }
  .dr-knob {
    bottom: 50% !important;
    transform: translateY(50%);
    right: 14px !important;
  }
  
  .hallway-nav-panel {
    display: none !important;
  }
  
  .hall-overlay-title {
    position: static;
    transform: none;
    padding: 6rem 1rem 1rem 1rem;
  }
  
  /* Static Bar adjustments */
  .room-bar-static {
    position: sticky;
    top: 0;
  }
  
  /* Projects view vertical stack */
  .bus-wire, .string-3d {
    display: none !important;
  }
  .bus-scene-3d {
    position: relative !important;
    transform: none !important;
    display: flex;
    flex-direction: column;
    padding: 5rem 1rem 1rem 1rem;
    height: auto !important;
    align-items: center;
    gap: 1.5rem;
  }
  .fw-3d {
    position: relative !important;
    left: auto !important;
    top: auto !important;
    transform: none !important;
  }
  .frame-3d {
    width: min(290px, 86vw) !important;
    height: auto !important;
  }
  
  /* Skills Palette stack */
  .skills-table-3d {
    position: relative !important;
    transform: none !important;
    left: auto !important;
    top: auto !important;
    width: 100% !important;
    height: auto !important;
    border-radius: 8px !important;
    border: none !important;
    background: transparent !important;
    box-shadow: none !important;
    display: flex !important;
    flex-wrap: wrap !important;
    gap: 0.8rem !important;
    padding: 1rem 0 !important;
  }
  .skill-glob-3d {
    transform: none !important;
    position: relative !important;
  }
  .skill-glob-3d:hover {
    transform: scale(1.08) !important;
  }
  .skills-info-box-3d {
    position: relative !important;
    transform: none !important;
    left: auto !important;
    top: auto !important;
    width: 100% !important;
    margin-top: 1rem;
  }

  /* Hobbies layout */
  .camera-3d-model, .easel-3d-model, .dumbbell-3d-model {
    position: relative !important;
    transform: none !important;
    left: auto !important;
    right: auto !important;
    top: auto !important;
    bottom: auto !important;
    display: inline-block !important;
    margin: 1rem auto !important;
    text-align: center !important;
  }
  .hobbies-info-board {
    position: relative !important;
    transform: none !important;
    left: auto !important;
    top: auto !important;
    width: 100% !important;
    margin-top: 1.5rem;
  }
  
  /* Education layouts */
  .bookshelf-3d {
    position: relative !important;
    transform: none !important;
    left: auto !important;
    top: auto !important;
    width: 100% !important;
    height: auto !important;
    border: none !important;
    background: transparent !important;
    box-shadow: none !important;
    padding: 0 !important;
  }
  .shelf-row {
    flex-direction: column !important;
    height: auto !important;
    align-items: center !important;
    gap: 1rem !important;
    border: none !important;
    padding: 1rem 0 !important;
  }
  .edu-book-3d {
    position: relative !important;
    transform: none !important;
    width: 80% !important;
    height: 90px !important;
    flex-direction: row !important;
    align-items: center !important;
  }
  .edu-book-3d:hover, .edu-book-3d.selected {
    transform: translateY(-2px) scale(1.02) !important;
  }
  .desk-study-panel {
    position: relative !important;
    transform: none !important;
    left: auto !important;
    top: auto !important;
    bottom: auto !important;
    width: 100% !important;
    margin-top: 1.5rem;
  }
  
  /* Contact Balcony */
  #contact-box {
    padding-top: 5rem !important;
  }
  .balcony-plant, .balcony-lantern-glowing {
    display: none !important;
  }
  .contact-box-3d {
    position: relative !important;
    transform: none !important;
    left: auto !important;
    top: auto !important;
    width: 100% !important;
    border: none !important;
    box-shadow: none !important;
    background: transparent !important;
    padding: 0 !important;
  }
}