/* Premium Design System Design Variables */
    :root {
      --bg-dark: #0b0f19;
      --bg-surface: #131b2e;
      --bg-surface-elevated: #1e2942;
      --accent: #f59e0b; /* Amber Gold */
      --accent-hover: #d97706;
      --accent-rgb: 245, 158, 11;
      --text-primary: #f8fafc;
      --text-secondary: #94a3b8;
      --text-muted: #64748b;
      --border-color: rgba(255, 255, 255, 0.08);
      --glass-bg: rgba(11, 15, 25, 0.7);
      --font-stack: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      --shadow-sm: 0 2px 8px rgba(0,0,0,0.4);
      --shadow-md: 0 12px 24px -10px rgba(0,0,0,0.6);
      --shadow-lg: 0 20px 40px -15px rgba(0,0,0,0.8);
      --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

    html {
      scroll-behavior: smooth;
      color-scheme: dark;
    }

    body {
      background-color: var(--bg-dark);
      color: var(--text-primary);
      font-family: var(--font-stack);
      line-height: 1.6;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

    /* Core Layout Spacing & Wrappers */
    .container {
      width: 100%;
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }

    /* Micro-interactions & Helpers */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      font-weight: 600;
      font-size: 0.95rem;
      padding: 0.75rem 1.5rem;
      border-radius: 9999px;
      transition: var(--transition-smooth);
      cursor: pointer;
      border: 1px solid transparent;
      text-decoration: none;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--accent) 0%, #d97706 100%);
      color: #0b0f19;
      box-shadow: 0 4px 20px rgba(245, 158, 11, 0.3);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 24px rgba(245, 158, 11, 0.4);
      background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    }

    .btn-secondary {
      background: rgba(255, 255, 255, 0.05);
      color: var(--text-primary);
      border-color: var(--border-color);
      backdrop-filter: blur(8px);
    }

    .btn-secondary:hover {
      background: rgba(255, 255, 255, 0.1);
      transform: translateY(-2px);
      border-color: rgba(255, 255, 255, 0.2);
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      background: rgba(245, 158, 11, 0.1);
      border: 1px solid rgba(245, 158, 11, 0.2);
      color: var(--accent);
      padding: 0.35rem 0.85rem;
      border-radius: 9999px;
      font-size: 0.8rem;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }

    /* Sticky Navigation Header */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: var(--glass-bg);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition-smooth);
    }

    .site-header.scrolled {
      padding: 0.6rem 0;
      box-shadow: var(--shadow-lg);
      background: rgba(11, 15, 25, 0.9);
    }

    .header-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 4.5rem;
      transition: var(--transition-smooth);
    }

    .site-logo {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--text-primary);
      text-decoration: none;
      letter-spacing: -0.02em;
    }

    .site-logo span {
      background: linear-gradient(135deg, var(--accent) 0%, #fbbf24 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .logo-icon {
      width: 2.25rem;
      height: 2.25rem;
      display: grid;
      place-items: center;
      background: linear-gradient(135deg, var(--accent) 0%, #d97706 100%);
      border-radius: 8px;
    }

    .nav-menu {
      display: none;
      align-items: center;
      gap: 2rem;
    }

    @media (min-width: 1024px) {
      .nav-menu {
        display: flex;
      }
    }

    .nav-link {
      color: var(--text-secondary);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      transition: var(--transition-smooth);
      position: relative;
    }

    .nav-link:hover, .nav-link.active {
      color: var(--text-primary);
    }

    .nav-link::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 0;
      width: 0;
      height: 2px;
      background-color: var(--accent);
      transition: var(--transition-smooth);
    }

    .nav-link:hover::after {
      width: 100%;
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 1rem;
    }

    .nav-phone {
      display: none;
      align-items: center;
      gap: 0.5rem;
      color: var(--text-primary);
      text-decoration: none;
      font-weight: 600;
      font-size: 0.95rem;
      transition: var(--transition-smooth);
    }

    @media (min-width: 768px) {
      .nav-phone {
        display: inline-flex;
      }
    }

    .nav-phone:hover {
      color: var(--accent);
    }

    .menu-toggle {
      display: grid;
      place-items: center;
      width: 2.5rem;
      height: 2.5rem;
      background: rgba(255,255,255,0.05);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      color: var(--text-primary);
      cursor: pointer;
    }

    @media (min-width: 1024px) {
      .menu-toggle {
        display: none;
      }
    }

    /* Mobile Menu Drawer Overlay */
    .mobile-menu-overlay {
      position: fixed;
      top: 0;
      left: 0;
      width: 100vw;
      height: 100vh;
      background: rgba(11, 15, 25, 0.95);
      z-index: 99;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      gap: 2rem;
      opacity: 0;
      visibility: hidden;
      transition: var(--transition-smooth);
    }

    .mobile-menu-overlay.open {
      opacity: 1;
      visibility: visible;
    }

    .mobile-menu-overlay .nav-link {
      font-size: 1.5rem;
    }

    .close-mobile-menu {
      position: absolute;
      top: 1.5rem;
      right: 1.5rem;
      width: 3rem;
      height: 3rem;
      background: rgba(255,255,255,0.05);
      border: 1px solid var(--border-color);
      border-radius: 50%;
      color: var(--text-primary);
      cursor: pointer;
      display: grid;
      place-items: center;
    }

    /* Premium Hero Section with high quality background styling */
    .hero {
      position: relative;
      padding: 8rem 0 5rem 0;
      background: linear-gradient(180deg, rgba(11, 15, 25, 0.4) 0%, rgba(11, 15, 25, 0.95) 100%), 
                  url('https://images.unsplash.com/photo-1628744448840-55e12402b253?auto=format&fit=crop&w=1920&q=80') center center/cover no-repeat;
      overflow: hidden;
    }

    @media (min-width: 1024px) {
      .hero {
        padding: 10rem 0 8rem 0;
      }
    }

    /* Mesh gradient visual wrapper overlay for high-end look */
    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 70% 30%, rgba(245, 158, 11, 0.15) 0%, transparent 50%),
                  radial-gradient(circle at 20% 80%, rgba(30, 41, 59, 0.8) 0%, transparent 60%);
      pointer-events: none;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 52rem;
    }

    .hero-title {
      font-size: clamp(2.5rem, 5vw, 4.25rem);
      line-height: 1.1;
      font-weight: 800;
      letter-spacing: -0.03em;
      margin-top: 1.5rem;
      margin-bottom: 1.5rem;
    }

    .hero-title span {
      background: linear-gradient(135deg, #ffffff 30%, var(--accent) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: clamp(1.1rem, 2vw, 1.35rem);
      color: var(--text-secondary);
      line-height: 1.6;
      margin-bottom: 2.5rem;
      max-width: 44rem;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 1rem;
      margin-bottom: 4rem;
    }

    /* Trust indicators / logo cloud bar */
    .hero-trust {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 2rem;
      border-top: 1px solid var(--border-color);
      padding-top: 2rem;
    }

    .trust-stat {
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }

    .trust-stat-title {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--accent);
    }

    .trust-stat-text {
      font-size: 0.85rem;
      color: var(--text-secondary);
      max-width: 8rem;
      line-height: 1.3;
    }

    /* Core Services Section with Optimized Grid Layout */
    .services {
      padding: 6rem 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 42rem;
      margin: 0 auto 4rem auto;
    }

    .section-title {
      font-size: clamp(2rem, 3.5vw, 2.75rem);
      font-weight: 800;
      letter-spacing: -0.02em;
      margin-top: 1rem;
      margin-bottom: 1rem;
    }

    .section-desc {
      color: var(--text-secondary);
      font-size: 1.1rem;
    }

    /* Bento Styled Grid System - Exquisitely optimized for responsive and premium layout */
    .services-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 1.5rem;
    }

    @media (min-width: 640px) {
      .services-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (min-width: 1024px) {
      .services-grid {
        grid-template-columns: repeat(3, 1fr);
      }
    }

    .service-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 20px;
      padding: 2.25rem 2rem;
      transition: var(--transition-smooth);
      position: relative;
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    /* Make second item wider visually on desktop */
    @media (min-width: 1024px) {
      .service-card.wide-card {
        grid-column: span 2;
        background: linear-gradient(135deg, var(--bg-surface) 0%, rgba(30, 41, 59, 0.4) 100%);
        flex-direction: row;
        align-items: center;
        gap: 2.5rem;
      }

      .service-card.wide-card .service-icon {
        flex-shrink: 0;
        margin-bottom: 0;
      }
    }

    .service-card:hover {
      transform: translateY(-8px);
      border-color: rgba(245, 158, 11, 0.3);
      box-shadow: var(--shadow-lg), 
                  0 0 30px rgba(245, 158, 11, 0.05);
    }

    .service-icon {
      width: 3.5rem;
      height: 3.5rem;
      border-radius: 12px;
      display: grid;
      place-items: center;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border-color);
      color: var(--accent);
      margin-bottom: 1.75rem;
      transition: var(--transition-smooth);
    }

    .service-card:hover .service-icon {
      background: var(--accent);
      color: #0b0f19;
      transform: scale(1.05);
    }

    .service-card-title {
      font-size: 1.35rem;
      font-weight: 700;
      margin-bottom: 0.75rem;
      letter-spacing: -0.01em;
    }

    .service-card-desc {
      color: var(--text-secondary);
      font-size: 0.95rem;
      margin-bottom: 1.5rem;
      flex-grow: 1;
    }

    .service-features-list {
      list-style: none;
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem;
      margin-top: auto;
    }

    .service-feature {
      display: inline-flex;
      align-items: center;
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 0.35rem 0.65rem;
      font-size: 0.8rem;
      font-weight: 500;
      color: var(--text-secondary);
    }

    /* Live Interactive Roof Price Calculator Section */
    .calculator-section {
      padding: 6rem 0;
      background: radial-gradient(circle at 10% 20%, rgba(30, 41, 59, 0.3) 0%, transparent 40%);
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .calculator-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 3rem;
      align-items: center;
    }

    @media (min-width: 1024px) {
      .calculator-grid {
        grid-template-columns: 1fr 1.2fr;
      }
    }

    .calc-box {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 24px;
      padding: 2rem;
      box-shadow: var(--shadow-lg);
    }

    .calc-control-group {
      margin-bottom: 1.75rem;
    }

    .calc-label-container {
      display: flex;
      justify-content: space-between;
      margin-bottom: 0.75rem;
    }

    .calc-label {
      font-weight: 600;
      font-size: 0.95rem;
    }

    .calc-val {
      font-weight: 700;
      color: var(--accent);
    }

    /* Range input resets CSS */
    .calc-slider {
      width: 100%;
      background: var(--bg-surface-elevated);
      height: 6px;
      border-radius: 3px;
      outline: none;
      -webkit-appearance: none;
    }

    .calc-slider::-webkit-slider-thumb {
      -webkit-appearance: none;
      width: 20px;
      height: 20px;
      border-radius: 50%;
      background: var(--accent);
      cursor: pointer;
      transition: var(--transition-smooth);
    }

    .calc-slider::-webkit-slider-thumb:hover {
      transform: scale(1.15);
    }

    .material-options {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 0.75rem;
    }

    .material-card {
      border: 1.5px solid var(--border-color);
      background: var(--bg-surface-elevated);
      border-radius: 12px;
      padding: 1rem;
      text-align: center;
      cursor: pointer;
      transition: var(--transition-smooth);
    }

    .material-card.active {
      border-color: var(--accent);
      background: rgba(245, 158, 11, 0.05);
    }

    .material-name {
      display: block;
      font-size: 0.85rem;
      font-weight: 700;
      margin-bottom: 0.25rem;
    }

    .material-cost {
      font-size: 0.75rem;
      color: var(--text-muted);
    }

    .calc-total-box {
      background: var(--bg-surface-elevated);
      border-radius: 16px;
      padding: 1.5rem;
      margin-top: 2rem;
      text-align: center;
      border: 1px dashed rgba(245, 158, 11, 0.3);
    }

    .calc-total-headline {
      font-size: 0.85rem;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      color: var(--text-secondary);
      margin-bottom: 0.5rem;
    }

    .calc-total-value {
      font-size: 2.25rem;
      font-weight: 800;
      color: var(--accent);
    }

    /* Before-After Showcase & Gallery */
    .showcase {
      padding: 6rem 0;
    }

    .comparison-container {
      position: relative;
      height: 450px;
      border-radius: 24px;
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-lg);
    }

    .comparison-img {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .comparison-after {
      clip-path: polygon(0 0, 50% 0, 50% 100%, 0 100%);
    }

    .comparison-handle {
      position: absolute;
      top: 0;
      bottom: 0;
      left: 50%;
      width: 4px;
      background: var(--accent);
      cursor: ew-resize;
      z-index: 10;
      pointer-events: none;
    }

    .handle-button {
      position: absolute;
      top: 50%;
      transform: translate(-50%, -50%);
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--accent);
      color: #0b0f19;
      display: grid;
      place-items: center;
      box-shadow: 0 0 10px rgba(0,0,0,0.5);
    }

    .calc-label-overlay {
      position: absolute;
      bottom: 1.5rem;
      background: rgba(11,15,25,0.8);
      backdrop-filter: blur(8px);
      padding: 0.5rem 1rem;
      border-radius: 8px;
      font-size: 0.85rem;
      font-weight: 700;
      z-index: 5;
    }
    
    .calc-label-before {
      right: 1.5rem;
    }

    .calc-label-after {
      left: 1.5rem;
    }

    /* Testimonials Masonry */
    .testimonials {
      padding: 6rem 0;
      background: var(--bg-surface);
      border-top: 1px solid var(--border-color);
    }

    .testimonial-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 1.5rem;
    }

    @media (min-width: 768px) {
      .testimonial-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (min-width: 1024px) {
      .testimonial-grid {
        grid-template-columns: repeat(3, 1fr);
      }
    }

    .testimonial-card {
      background: var(--bg-dark);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 2rem;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .stars {
      color: var(--accent);
      margin-bottom: 1rem;
    }

    .testimonial-text {
      color: var(--text-secondary);
      font-size: 0.95rem;
      line-height: 1.6;
      margin-bottom: 1.5rem;
    }

    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 1rem;
    }

    .author-img {
      width: 2.75rem;
      height: 2.75rem;
      border-radius: 50%;
      object-fit: cover;
    }

    .author-name {
      font-weight: 700;
      font-size: 0.9rem;
    }

    .author-role {
      font-size: 0.75rem;
      color: var(--text-muted);
    }

    /* Ultra-Modern FAQ Section */
    .faq {
      padding: 6rem 0;
    }

    .faq-container {
      max-width: 48rem;
      margin: 0 auto;
    }

    .faq-accordion {
      border-bottom: 1px solid var(--border-color);
    }

    .faq-trigger {
      width: 100%;
      background: none;
      border: none;
      color: var(--text-primary);
      text-align: left;
      font-size: 1.15rem;
      font-weight: 700;
      padding: 1.5rem 0;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: var(--transition-smooth);
    }

    .faq-trigger:hover {
      color: var(--accent);
    }

    .faq-content {
      height: 0;
      overflow: hidden;
      color: var(--text-secondary);
      font-size: 0.95rem;
      line-height: 1.6;
      padding-bottom: 0;
      transition: all 0.3s cubic-bezier(1,0,0,1);
    }

    .faq-accordion.active .faq-content {
      height: auto;
      padding-bottom: 1.5rem;
    }

    .faq-icon {
      transition: var(--transition-smooth);
    }

    .faq-accordion.active .faq-icon {
      transform: rotate(180deg);
      color: var(--accent);
    }

    /* High-impact CTA banner */
    .cta-banner {
      padding: 8rem 0;
      position: relative;
      background: linear-gradient(180deg, var(--bg-dark) 0%, rgba(19, 27, 46, 0.9) 100%),
                  url('https://images.unsplash.com/photo-1600585154340-be6161a56a0c?auto=format&fit=crop&w=1200&q=80') center center/cover no-repeat;
      text-align: center;
      overflow: hidden;
      border-top: 1px solid var(--border-color);
    }

    .cta-banner::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(circle, rgba(245, 158, 11, 0.15) 0%, transparent 60%);
    }

    .cta-banner-content {
      position: relative;
      z-index: 2;
      max-width: 44rem;
      margin: 0 auto;
    }

    /* Dynamic Popup Modal for Get a Free Quote */
    .modal-overlay {
      position: fixed;
      inset: 0;
      background: rgba(11, 15, 25, 0.85);
      backdrop-filter: blur(8px);
      z-index: 1000;
      display: flex;
      place-items: center;
      justify-content: center;
      opacity: 0;
      visibility: hidden;
      transition: var(--transition-smooth);
      padding: 1.5rem;
    }

    .modal-overlay.open {
      opacity: 1;
      visibility: visible;
    }

    .modal-container {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: 24px;
      width: 100%;
      max-width: 32rem;
      padding: 2.5rem;
      position: relative;
      transform: scale(0.9);
      transition: var(--transition-smooth);
    }

    .modal-overlay.open .modal-container {
      transform: scale(1);
    }

    .modal-close {
      position: absolute;
      top: 1.25rem;
      right: 1.25rem;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid var(--border-color);
      width: 2.25rem;
      height: 2.25rem;
      border-radius: 50%;
      color: var(--text-primary);
      cursor: pointer;
      display: grid;
      place-items: center;
    }

    .modal-title {
      font-size: 1.5rem;
      font-weight: 800;
      margin-bottom: 0.5rem;
    }

    .modal-desc {
      color: var(--text-secondary);
      font-size: 0.9rem;
      margin-bottom: 1.75rem;
    }

    .form-group {
      margin-bottom: 1.25rem;
    }

    .form-label {
      display: block;
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 0.5rem;
    }

    .form-input {
      width: 100%;
      background: var(--bg-dark);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      color: var(--text-primary);
      padding: 0.75rem 1rem;
      font-family: inherit;
      font-size: 0.95rem;
      transition: var(--transition-smooth);
    }

    .form-input:focus {
      outline: none;
      border-color: var(--accent);
      box-shadow: 0 0 10px rgba(245, 158, 11, 0.15);
    }

    /* Footer Design */
    .site-footer {
      background: #070a11;
      border-top: 1px solid var(--border-color);
      padding: 5rem 0 3rem 0;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 3rem;
      margin-bottom: 4rem;
    }

    @media (min-width: 640px) {
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (min-width: 1024px) {
      .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1fr;
      }
    }

    .footer-box-desc {
      color: var(--text-secondary);
      font-size: 0.95rem;
      margin-top: 1rem;
      margin-bottom: 1.5rem;
      max-width: 18rem;
    }

    .footer-header {
      font-weight: 700;
      font-size: 1rem;
      color: var(--text-primary);
      margin-bottom: 1.5rem;
    }

    .footer-links {
      list-style: none;
    }

    .footer-link-item {
      margin-bottom: 0.75rem;
    }

    .footer-link {
      color: var(--text-secondary);
      text-decoration: none;
      font-size: 0.95rem;
      transition: var(--transition-smooth);
    }

    .footer-link:hover {
      color: var(--accent);
      padding-left: 4px;
    }

    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 2rem;
      display: flex;
      flex-direction: column;
      gap: 1rem;
      align-items: center;
      justify-content: space-between;
    }

    @media (min-width: 768px) {
      .footer-bottom {
        flex-direction: row;
      }
    }

    .footer-copy {
      color: var(--text-muted);
      font-size: 0.85rem;
    }

    .footer-secondary-links {
      display: flex;
      gap: 1.5rem;
    }

    /* Standard high aesthetic adjustments */
    ::-webkit-scrollbar {
      width: 10px;
    }
    ::-webkit-scrollbar-track {
      background: var(--bg-dark);
    }
    ::-webkit-scrollbar-thumb {
      background: var(--bg-surface-elevated);
      border-radius: 5px;
    }
    ::-webkit-scrollbar-thumb:hover {
      background: var(--accent);
    }