:root {
  --bg-color: #07090e;
  --surface-base: rgba(255, 255, 255, 0.03);
  --surface-overlay: rgba(15, 20, 30, 0.7);
  --border-color: rgba(255, 255, 255, 0.1);
  --text-main: #f1f5f9;
  --text-muted: #94a3b8;
  --neon-start: #00f2fe;
  --neon-end: #4facfe;
  --focus-ring: #00f2fe;
  
  --space-4: 4px;
  --space-8: 8px;
  --space-12: 12px;
  --space-16: 16px;
  --space-24: 24px;
  --space-40: 40px;
  --space-64: 64px;
  
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
}

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

body, h1, h2, h3, p, ul, li, figure {
  margin: 0;
  padding: 0;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6, .brand, .site-nav a, .text-wrap {
  overflow-wrap: anywhere;
}

a {
  color: var(--neon-end);
  text-decoration: none;
  transition: color 0.2s ease, text-shadow 0.2s ease;
}

a:hover {
  color: var(--neon-start);
  text-shadow: 0 0 8px rgba(0, 242, 254, 0.4);
}

:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 4px;
  border-radius: 2px;
}

.brand:focus-visible, .nav-toggle:focus-visible, .btn:focus-visible {
  border-radius: var(--radius-sm);
}

/* Glassmorphism Utilities */
.glass-panel {
  background: var(--surface-base);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
}

.text-gradient {
  background: linear-gradient(90deg, var(--neon-start), var(--neon-end));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent;
}

/* Header */
.site-header {
  height: 64px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  background: rgba(7, 9, 14, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  position: relative;
  z-index: 100;
}

.header-inner {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-24);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text-main);
}

.brand svg {
  flex-shrink: 0;
}

.site-nav {
  display: flex;
  gap: var(--space-24);
  align-items: center;
}

.site-nav a {
  color: var(--text-main);
  font-size: 0.95rem;
}

.site-nav a:hover {
  color: var(--neon-start);
}

.header-cta {
  display: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-16);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: 1px solid var(--border-color);
  background: var(--surface-base);
  color: var(--text-main);
  transition: all 0.2s ease;
}

.btn-primary {
  background: linear-gradient(90deg, rgba(0, 242, 254, 0.1), rgba(79, 172, 254, 0.1));
  border-color: var(--neon-end);
  color: var(--neon-start);
}

.btn-primary:hover {
  background: linear-gradient(90deg, rgba(0, 242, 254, 0.2), rgba(79, 172, 254, 0.2));
  box-shadow: 0 0 12px rgba(0, 242, 254, 0.3);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-main);
  cursor: pointer;
  padding: var(--space-4);
}

.nav-toggle svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

/* Main Layout */
.main-content {
  flex: 1;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--space-64) var(--space-24);
}

section + section {
  margin-top: var(--space-64);
}

/* Hero Section */
.hero {
  text-align: center;
  padding: var(--space-64) 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-24);
}

.hero h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.hero p {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 600px;
}

/* Card Style: Glass overlay */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-24);
}

.glass-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  height: 380px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  text-decoration: none;
  color: var(--text-main);
  isolation: isolate;
  min-width: 0;
}

.glass-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  pointer-events: none;
  z-index: 3;
}

.card-img-wrap {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.card-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.glass-card:hover .card-img {
  transform: scale(1.05);
}

.card-overlay {
  position: relative;
  z-index: 2;
  background: var(--surface-overlay);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: var(--space-24);
  border-top: 1px solid var(--border-color);
  transform: translateY(0);
  transition: background 0.3s ease;
}

.glass-card:hover .card-overlay {
  background: rgba(15, 20, 30, 0.85);
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: var(--space-8);
}

.card-excerpt {
  font-size: 0.9rem;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Article / Content Pages */
.article-header {
  margin-bottom: var(--space-40);
  text-align: center;
}

.article-header h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: var(--space-16);
}

.article-meta {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.content-body {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.05rem;
}

.content-body h2 {
  font-size: 1.75rem;
  margin: var(--space-40) 0 var(--space-16);
  color: var(--text-main);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: var(--space-8);
}

.content-body h3 {
  font-size: 1.35rem;
  margin: var(--space-24) 0 var(--space-12);
}

.content-body p {
  margin-bottom: var(--space-16);
}

.content-body ul, .content-body ol {
  margin-bottom: var(--space-24);
  padding-left: var(--space-24);
}

.content-body li {
  margin-bottom: var(--space-8);
}

.content-body table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: var(--space-24);
}

.table-wrapper {
  overflow-x: auto;
  margin-bottom: var(--space-24);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  background: var(--surface-base);
}

.content-body table th, .content-body table td {
  padding: var(--space-12) var(--space-16);
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.content-body table th {
  background: rgba(255, 255, 255, 0.05);
  font-weight: 600;
}

.stat-block {
  display: flex;
  align-items: baseline;
  gap: var(--space-12);
  padding: var(--space-16);
  background: var(--surface-base);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-24);
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--neon-start);
}

.stat-label {
  font-size: 1rem;
  color: var(--text-muted);
}

/* Forms */
.form-group {
  margin-bottom: var(--space-24);
}

.form-label {
  display: block;
  margin-bottom: var(--space-8);
  font-weight: 600;
}

.form-control {
  width: 100%;
  padding: var(--space-12) var(--space-16);
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--neon-start);
  box-shadow: 0 0 0 2px rgba(0, 242, 254, 0.2);
}

.form-control.is-invalid {
  border-color: #ff4b4b;
}

.form-msg {
  display: none;
  margin-top: var(--space-16);
  padding: var(--space-12);
  border-radius: var(--radius-sm);
  background: rgba(0, 242, 254, 0.1);
  border: 1px solid var(--neon-start);
  color: var(--text-main);
}

.form-msg.is-visible {
  display: block;
}

.map-block {
  width: 100%;
  height: 300px;
  background: linear-gradient(45deg, #0b101a, #1a2235);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  position: relative;
  overflow: hidden;
}

.map-block::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(var(--border-color) 1px, transparent 1px);
  background-size: 20px 20px;
  opacity: 0.5;
}

.map-marker {
  position: relative;
  z-index: 2;
  text-align: center;
}

.map-marker svg {
  width: 32px;
  height: 32px;
  stroke: var(--neon-start);
  margin-bottom: var(--space-8);
}

/* Footer */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border-color);
  background: rgba(7, 9, 14, 0.95);
  padding: var(--space-64) var(--space-24) var(--space-24);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-40);
  margin-bottom: var(--space-40);
}

.footer-col h4 {
  font-size: 1.1rem;
  margin-bottom: var(--space-16);
  color: var(--text-main);
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: var(--space-8);
}

.footer-col a, .footer-col p {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-col a:hover {
  color: var(--neon-start);
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: var(--space-24);
  border-top: 1px solid var(--border-color);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-16);
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Cookie Banner */
.cookie-banner {
  position: fixed;
  bottom: var(--space-24);
  left: var(--space-24);
  right: var(--space-24);
  max-width: 800px;
  margin: 0 auto;
  padding: var(--space-24);
  border-radius: var(--radius-md);
  z-index: 1000;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-16);
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 12px 48px rgba(0, 0, 0, 0.5);
  transform: translateY(150%);
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.cookie-banner.is-visible {
  transform: translateY(0);
}

.cookie-text {
  flex: 1 1 300px;
  font-size: 0.9rem;
}

.cookie-actions {
  display: flex;
  gap: var(--space-8);
  flex-wrap: wrap;
}

/* Responsive */
@media (max-width: 767px) {
  .site-header {
    height: 52px;
  }
  
  .header-cta {
    display: none;
  }
  
  .nav-toggle {
    display: block;
  }
  
  .site-nav {
    display: none;
    position: absolute;
    top: 52px;
    left: 0;
    right: 0;
    background: rgba(7, 9, 14, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: var(--space-24);
    gap: var(--space-16);
  }
  
  .site-nav.is-open {
    display: flex;
  }
  
  .card-grid {
    grid-template-columns: 1fr;
  }
  
  .hero h1 {
    font-size: 2.25rem;
  }
  
  .cookie-banner {
    bottom: 0;
    left: 0;
    right: 0;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    border-bottom: none;
  }
}

@media (min-width: 768px) {
  .header-cta {
    display: flex;
  }
}

@media (max-width: 399px) {
  .main-content {
    padding: var(--space-40) var(--space-16);
  }
  
  .glass-card {
    height: 320px;
  }
  
  .cookie-actions {
    flex-direction: column;
    width: 100%;
  }
  
  .cookie-actions .btn {
    width: 100%;
  }
  
  .stat-block {
    flex-direction: column;
    gap: var(--space-4);
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}
/* ENDFILE */
<!-- FILE: script.js -->
document.addEventListener('DOMContentLoaded', () => {
  // Mobile Navigation Toggle
  const navToggle = document.querySelector('.nav-toggle');
  const siteNav = document.querySelector('.site-nav');

  if (navToggle && siteNav) {
    navToggle.addEventListener('click', () => {
      const isExpanded = navToggle.getAttribute('aria-expanded') === 'true';
      navToggle.setAttribute('aria-expanded', !isExpanded);
      siteNav.classList.toggle('is-open');
    });
  }

  // Cookie Banner Logic
  const cookieBanner = document.getElementById('cookieBanner');
  if (cookieBanner) {
    const cookieChoice = localStorage.getItem('cookieChoice');
    if (!cookieChoice) {
      // Small delay for animation
      setTimeout(() => {
        cookieBanner.classList.add('is-visible');
      }, 500);
    }

    const cookieBtns = document.querySelectorAll('[data-cookie-choice]');
    cookieBtns.forEach(btn => {
      btn.addEventListener('click', (e) => {
        const choice = e.target.getAttribute('data-cookie-choice');
        localStorage.setItem('cookieChoice', choice);
        cookieBanner.classList.remove('is-visible');
      });
    });
  }

  // Contact Form Validation
  const contactForm = document.getElementById('contactForm');
  if (contactForm) {
    contactForm.addEventListener('submit', (e) => {
      e.preventDefault();
      
      const inputs = contactForm.querySelectorAll('.form-control');
      let isValid = true;

      inputs.forEach(input => {
        if (!input.checkValidity()) {
          isValid = false;
          input.classList.add('is-invalid');
        } else {
          input.classList.remove('is-invalid');
        }
      });

      if (isValid) {
        // Simulate successful submission
        const formMsg = document.getElementById('formMessage');
        formMsg.textContent = "Thank you. Your message has been securely transmitted.";
        formMsg.classList.add('is-visible');
        contactForm.reset();
        
        setTimeout(() => {
          formMsg.classList.remove('is-visible');
        }, 5000);
      }
    });

    // Remove invalid class on input
    const inputs = contactForm.querySelectorAll('.form-control');
    inputs.forEach(input => {
      input.addEventListener('input', () => {
        input.classList.remove('is-invalid');
      });
    });
  }
});
/* ENDFILE */
<!-- FILE: index.html -->
<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Vaultbundletempon - Next-Generation LED Lighting</title>
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</head>
<body>
  <header class="site-header">
    <div class="header-inner">
      <a href="index.html" class="brand text-wrap">
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        Vaultbundletempon
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      <nav class="site-nav">
        <a href="types-of-led-lights.html">Types</a>
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        <a href="led-energy-efficiency.html">Efficiency</a>
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      </nav>
      <a href="types-of-led-lights.html" class="btn btn-primary header-cta">Explore Guides</a>
    </div>
  </header>

  <main class="main-content">
    <section class="hero">
      <h1 class="text-gradient text-wrap">Illuminate Your World</h1>
      <p>Discover everything you need to know about modern LED lighting technology. From essential concepts and installation techniques to advanced smart systems, master the light.</p>
    </section>

    <section id="guides">
      <div class="card-grid">
        <a href="types-of-led-lights.html" class="glass-card">
          <div class="card-img-wrap">
            <img src="https://picsum.photos/seed/ledtypes/800/600" alt="Various shapes of LED bulbs" class="card-img" loading="lazy">
          </div>
          <div class="card-overlay">
            <h3 class="card-title text-wrap">Types of LED Lights</h3>
            <p class="card-excerpt">Explore the structural differences between panels, strips, downlights, and standard bulbs for specific environments.</p>
          </div>
        </a>

        <a href="led-color-temperatures.html" class="glass-card">
          <div class="card-img-wrap">
            <img src="https://picsum.photos/seed/ledcolortemp/800/600" alt="Warm and cool lighting illuminating a room" class="card-img" loading="lazy">
          </div>
          <div class="card-overlay">
            <h3 class="card-title text-wrap">Understanding Color Temperatures</h3>
            <p class="card-excerpt">Navigate the Kelvin scale and learn how warm, neutral, and daylight tones affect focus and relaxation.</p>
          </div>
        </a>

        <a href="smart-led-systems.html" class="glass-card">
          <div class="card-img-wrap">
            <img src="https://picsum.photos/seed/smartleds/800/600" alt="A smart home controller tablet next to a glowing light" class="card-img" loading="lazy">
          </div>
          <div class="card-overlay">
            <h3 class="card-title text-wrap">Smart LED Systems</h3>
            <p class="card-excerpt">Dive into wireless protocols, automation hubs, and how to build a connected lighting ecosystem.</p>
          </div>
        </a>

        <a href="led-energy-efficiency.html" class="glass-card">
          <div class="card-img-wrap">
            <img src="https://picsum.photos/seed/ledenergy/800/600" alt="An LED circuit board glowing faintly" class="card-img" loading="lazy">
          </div>
          <div class="card-overlay">
            <h3 class="card-title text-wrap">Energy Efficiency & ROI</h3>
            <p class="card-excerpt">Calculate real savings by understanding lumens per watt, thermal degradation, and the L70 lifespan standard.</p>
          </div>
        </a>

        <a href="led-installation-guide.html" class="glass-card">
          <div class="card-img-wrap">
            <img src="https://picsum.photos/seed/ledinstall/800/600" alt="Tools and an LED light strip laid out on a table" class="card-img" loading="lazy">
          </div>
          <div class="card-overlay">
            <h3 class="card-title text-wrap">LED Installation Guide</h3>
            <p class="card-excerpt">A practical breakdown of measuring, cutting, soldering, and mounting flexible LED strip lighting.</p>
          </div>
        </a>
      </div>
    </section>

    <section class="glass-panel" style="padding: var(--space-40); border-radius: var(--radius-lg); margin-top: var(--space-64);">
      <div style="max-width: 800px; margin: 0 auto; text-align: center;">
        <h2 style="margin-bottom: var(--space-16);">Why Lighting Matters</h2>
        <p style="color: var(--text-muted); margin-bottom: var(--space-24);">Solid-state lighting has completely redefined our built environments. Transitioning to LED architecture isn't just an energy upgrade—it's a fundamental shift in how we perceive and interact with our spaces. Through careful selection of form factor, color rendition, and control mechanisms, you have the power to engineer visual comfort.</p>
        <div style="display: flex; gap: var(--space-16); justify-content: center; flex-wrap: wrap;">
          <a href="types-of-led-lights.html" class="btn btn-primary">Start Learning</a>
          <a href="contact.html" class="btn">Contact Our Team</a>
        </div>
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    </section>
  </main>

  <footer class="site-footer">
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