.fp-real-estate-vr-tour-loading-ui {
  /* Layout Variables */
  --fp-container-width: 100%;
  --fp-max-width: 500px;
  --fp-aspect-ratio: 1 / 1;

  /* Semantic Color Variables - Emerald Wealth */
  --fp-primary-color: #F8F7F4;       
  --fp-secondary-color: #EBE8E0;     
  --fp-text-color: #111827;          
  --fp-muted-color: #6B7280;         
  
  --fp-soft-color: rgba(4, 120, 87, 0.08); 
  --fp-accent-color: #047857;        
  --fp-info-color: #10B981;          
  --fp-warning-color: #D4AF37;       
  --fp-danger-color: #DC2626;        
  --fp-background-color: transparent;

  width: var(--fp-container-width);
  max-width: var(--fp-max-width);
  margin: 0 auto;
  background: var(--fp-background-color);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
}

/* Main Stage */
.fp-real-estate-vr-tour-loading-ui-stage {
  aspect-ratio: var(--fp-aspect-ratio);
  width: 100%;
  background-color: var(--fp-primary-color);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  border-radius: 24px;
  box-shadow: inset 0 0 60px rgba(0,0,0,0.03);
}

/* Layer 1: Base Breathing Background Orbs */
.fp-real-estate-vr-tour-loading-ui-bg-orb {
  position: absolute;
  width: 60%;
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle, var(--fp-info-color) 0%, transparent 60%);
  opacity: 0.15;
  border-radius: 50%;
  filter: blur(40px);
  animation: fp-real-estate-vr-tour-loading-ui-breathe 8s ease-in-out infinite alternate;
  z-index: 1;
}

.fp-real-estate-vr-tour-loading-ui-bg-orb-2 {
  width: 50%;
  background: radial-gradient(circle, var(--fp-warning-color) 0%, transparent 60%);
  opacity: 0.1;
  top: 10%;
  left: 60%;
  animation: fp-real-estate-vr-tour-loading-ui-breathe 6s ease-in-out infinite alternate-reverse;
}

/* Glassmorphism Panel */
.fp-real-estate-vr-tour-loading-ui-glass {
  position: relative;
  z-index: 2;
  width: 80%;
  height: 80%;
  background: rgba(255, 255, 255, 0.4);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 32px;
  box-shadow: 0 10px 40px rgba(4, 120, 87, 0.05), inset 0 0 0 1px rgba(255, 255, 255, 0.5);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 8%;
  box-sizing: border-box;
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

/* Layer 2: Expanding Rings */
.fp-real-estate-vr-tour-loading-ui-rings-container {
  position: relative;
  width: 120px;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 32px;
}

.fp-real-estate-vr-tour-loading-ui-ring {
  position: absolute;
  border: 2px solid var(--fp-accent-color);
  border-radius: 50%;
  opacity: 0;
  animation: fp-real-estate-vr-tour-loading-ui-expand 3s cubic-bezier(0.215, 0.610, 0.355, 1) infinite;
}

.fp-real-estate-vr-tour-loading-ui-ring:nth-child(1) { animation-delay: 0s; }
.fp-real-estate-vr-tour-loading-ui-ring:nth-child(2) { animation-delay: 1s; }
.fp-real-estate-vr-tour-loading-ui-ring:nth-child(3) { animation-delay: 2s; }

/* Core Element */
.fp-real-estate-vr-tour-loading-ui-core {
  position: relative;
  z-index: 3;
  width: 56px;
  height: 56px;
  background: var(--fp-primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(4, 120, 87, 0.15);
  border: 1px solid var(--fp-secondary-color);
}

.fp-real-estate-vr-tour-loading-ui-icon {
  width: 24px;
  height: 24px;
  fill: none;
  stroke: var(--fp-accent-color);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Typography & UI */
.fp-real-estate-vr-tour-loading-ui-text-wrap {
  text-align: center;
  width: 100%;
}

.fp-real-estate-vr-tour-loading-ui-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--fp-accent-color);
  margin-bottom: 8px;
}

.fp-real-estate-vr-tour-loading-ui-subtitle {
  font-size: 18px;
  font-weight: 300;
  color: var(--fp-text-color);
  margin-bottom: 32px;
  line-height: 1.3;
}

.fp-real-estate-vr-tour-loading-ui-progress-container {
  width: 100%;
  height: 4px;
  background: rgba(4, 120, 87, 0.1);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 12px;
  position: relative;
}

.fp-real-estate-vr-tour-loading-ui-progress-bar {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 0%;
  background: var(--fp-accent-color);
  border-radius: 2px;
  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.fp-real-estate-vr-tour-loading-ui-percentage {
  font-size: 13px;
  font-weight: 600;
  color: var(--fp-muted-color);
  font-family: 'Courier New', Courier, monospace;
  transition: color 0.2s ease;
}

/* Animations */
@keyframes fp-real-estate-vr-tour-loading-ui-breathe {
  0% { transform: scale(0.8) translate(-10%, -10%); opacity: 0.1; }
  100% { transform: scale(1.2) translate(10%, 10%); opacity: 0.2; }
}

@keyframes fp-real-estate-vr-tour-loading-ui-expand {
  0% { width: 40px; height: 40px; opacity: 0; border-width: 2px; }
  5% { opacity: 1; }
  100% { width: 120px; height: 120px; opacity: 0; border-width: 0px; }
}

/* Responsive */
@media (max-width: 480px) {
  .fp-real-estate-vr-tour-loading-ui-glass {
    width: 90%;
    padding: 10%;
  }
  .fp-real-estate-vr-tour-loading-ui-subtitle {
    font-size: 16px;
  }
}

document.querySelectorAll('.fp-real-estate-vr-tour-loading-ui').forEach(root => {
  const bar = root.querySelector('#fp-real-estate-vr-tour-loading-ui-bar');
  const pctText = root.querySelector('#fp-real-estate-vr-tour-loading-ui-pct');
  const glassPanel = root.querySelector('#fp-real-estate-vr-tour-loading-ui-glass-panel');
  const statusText = root.querySelector('#fp-real-estate-vr-tour-loading-ui-status-text');
  const core = root.querySelector('#fp-real-estate-vr-tour-loading-ui-core');

  let reqId;
  let isVisible = true;
  let lastTime = 0;
  
  let progress = 0;
  let spikeTimer = 0;

  const statuses = [
    "INITIALIZING VR",
    "LOADING TEXTURES",
    "RENDERING LIGHTING",
    "SYNCING SPATIAL AUDIO",
    "FINALIZING ENVIRONMENT"
  ];

  function animate(time) {
    if (!lastTime) lastTime = time;
    const dt = time - lastTime;
    lastTime = time;

    spikeTimer += dt;

    if (progress < 100) {
       progress += (dt * 0.005); 
    }

    if (spikeTimer > 800) {
      if (Math.random() > 0.5 && progress < 90) {
        const jump = Math.random() * 8;
        progress += jump;
        
        if (glassPanel) {
          glassPanel.style.boxShadow = '0 10px 50px rgba(4, 120, 87, 0.2), inset 0 0 0 1px rgba(16, 185, 129, 0.8)';
          glassPanel.style.borderColor = 'var(--fp-info-color)';
        }
        if (pctText) pctText.style.color = 'var(--fp-accent-color)';
        if (core) core.style.transform = 'scale(1.1)';
        
        const statusIndex = Math.floor((progress / 100) * statuses.length);
        if (statusText && statuses[Math.min(statusIndex, statuses.length - 1)]) {
          statusText.textContent = statuses[Math.min(statusIndex, statuses.length - 1)];
        }

        setTimeout(() => {
          if (!isVisible) return;
          if (glassPanel) {
            glassPanel.style.boxShadow = '0 10px 40px rgba(4, 120, 87, 0.05), inset 0 0 0 1px rgba(255, 255, 255, 0.5)';
            glassPanel.style.borderColor = 'rgba(255, 255, 255, 0.8)';
          }
          if (pctText) pctText.style.color = 'var(--fp-muted-color)';
          if (core) core.style.transform = 'scale(1)';
        }, 300);
      }
      spikeTimer = 0;
    }

    if (progress > 100) progress = 100;

    if (bar) bar.style.width = `${progress}%`;
    if (pctText) pctText.textContent = `${Math.floor(progress)}%`;

    if (progress >= 100) {
        if (statusText) statusText.textContent = "ENVIRONMENT READY";
        if (pctText) pctText.style.color = 'var(--fp-accent-color)';
        
        setTimeout(() => {
            if(progress >= 100) {
                progress = 0;
                if (statusText) statusText.textContent = statuses[0];
                if (pctText) pctText.style.color = 'var(--fp-muted-color)';
            }
        }, 2000);
    }

    if (isVisible) {
      reqId = requestAnimationFrame(animate);
    }
  }

  const observer = new IntersectionObserver((entries) => {
    entries.forEach(entry => {
      isVisible = entry.isIntersecting;
      if (isVisible) {
        lastTime = performance.now();
        if (!reqId) reqId = requestAnimationFrame(animate);
      } else {
        if (reqId) {
          cancelAnimationFrame(reqId);
          reqId = null;
        }
      }
    });
  });
  
  observer.observe(root);

  const handleVisibilityChange = () => {
    if (document.visibilityState === "hidden") {
      isVisible = false;
      if (reqId) {
        cancelAnimationFrame(reqId);
        reqId = null;
      }
    } else {
      isVisible = true;
      lastTime = performance.now();
      if (!reqId) reqId = requestAnimationFrame(animate);
    }
  };
  
  document.addEventListener("visibilitychange", handleVisibilityChange);

  const cleanupInterval = setInterval(() => {
    if (!document.body.contains(root)) {
      if (reqId) cancelAnimationFrame(reqId);
      observer.disconnect();
      document.removeEventListener("visibilitychange", handleVisibilityChange);
      clearInterval(cleanupInterval);
    }
  }, 1000);
});