:root {
  /* Colors */
  --bg-color: #020617;
  --bg-color-alt: #0f172a;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  
  --accent-electric: #0ea5e9;
  --accent-tech: #2563eb;
  --accent-green: #22c55e;
  
  --gradient-main: linear-gradient(135deg, var(--accent-electric), var(--accent-tech), var(--accent-green));
  --gradient-hover: linear-gradient(135deg, var(--accent-tech), var(--accent-electric));
  
  /* Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-bg-hover: rgba(255, 255, 255, 0.08);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
  
  /* Layout */
  --sidebar-collapsed: 80px;
  --sidebar-expanded: 240px;
  --sidebar-mobile: 280px;
  
  /* Typography */
  --font-heading: 'Inter', sans-serif;
  --font-body: 'Inter', sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  background-image: 
    radial-gradient(circle at 15% 50%, rgba(14, 165, 233, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 85% 30%, rgba(34, 197, 94, 0.05) 0%, transparent 50%);
  background-attachment: fixed;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
}

a {
  text-decoration: none;
  color: var(--accent-electric);
  transition: all 0.3s ease;
}

a:hover {
  color: var(--text-primary);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Utilities */
.text-gradient {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
}

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  box-shadow: var(--glass-shadow);
  transition: transform 0.3s ease, background 0.3s ease, border-color 0.3s ease;
  overflow: hidden;
  position: relative;
}

.glass-card:hover {
  transform: translateY(-5px);
  background: var(--glass-bg-hover);
  border-color: rgba(255, 255, 255, 0.2);
}

/* Glow effect */
.glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 50%;
  height: 100%;
  background: linear-gradient(to right, transparent, rgba(255,255,255,0.05), transparent);
  transform: skewX(-20deg);
  transition: 0.5s;
}

.glass-card:hover::before {
  left: 150%;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.8rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  border: none;
  transition: all 0.3s ease;
  gap: 0.5rem;
}

.btn-primary {
  background: var(--gradient-main);
  color: #fff;
  box-shadow: 0 4px 15px rgba(14, 165, 233, 0.3);
}

.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(14, 165, 233, 0.5);
  transform: translateY(-2px);
  color: #fff;
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--accent-electric);
  color: var(--text-primary);
}

.btn-outline:hover {
  background: rgba(14, 165, 233, 0.1);
  transform: translateY(-2px);
}

/* Scroll Progress */
.scroll-progress {
  position: fixed;
  top: 0;
  left: var(--sidebar-collapsed);
  width: 0%;
  height: 3px;
  background: var(--gradient-main);
  z-index: 1000;
  transition: width 0.1s;
}

/* ---------------------------------- */
/* Sidebar Navigation                 */
/* ---------------------------------- */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  width: var(--sidebar-collapsed);
  background: rgba(2, 6, 23, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-right: 1px solid var(--glass-border);
  z-index: 900;
  transition: width 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar:hover {
  width: var(--sidebar-expanded);
}

.sidebar-header {
  height: 80px;
  display: flex;
  align-items: center;
  padding: 0 1.2rem;
  min-width: var(--sidebar-expanded);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}

.brand-icon {
  font-size: 1.8rem;
  color: var(--accent-electric);
  min-width: 40px;
  display: flex;
  justify-content: center;
}

.brand-name {
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text-primary);
  opacity: 0;
  transition: opacity 0.3s;
  white-space: nowrap;
}

.sidebar:hover .brand-name {
  opacity: 1;
}

.nav-links {
  list-style: none;
  margin-top: 2rem;
  flex-grow: 1;
}

.nav-item {
  margin-bottom: 0.5rem;
}

.nav-link {
  display: flex;
  align-items: center;
  padding: 0.8rem 1.2rem;
  color: var(--text-secondary);
  text-decoration: none;
  min-width: var(--sidebar-expanded);
  transition: all 0.3s ease;
  border-left: 3px solid transparent;
}

.nav-link i {
  font-size: 1.4rem;
  min-width: 40px;
  display: flex;
  justify-content: center;
  transition: color 0.3s;
}

.nav-link span {
  font-size: 0.95rem;
  font-weight: 500;
  opacity: 0;
  transition: opacity 0.3s, transform 0.3s;
  transform: translateX(-10px);
  white-space: nowrap;
}

.sidebar:hover .nav-link span {
  opacity: 1;
  transform: translateX(0);
}

.nav-link:hover, .nav-item.active .nav-link {
  color: var(--text-primary);
  background: linear-gradient(90deg, rgba(14, 165, 233, 0.1), transparent);
  border-left-color: var(--accent-electric);
}

.nav-link:hover i, .nav-item.active .nav-link i {
  color: var(--accent-electric);
}

.sidebar-footer {
  padding: 1rem 1.2rem;
  min-width: var(--sidebar-expanded);
  display: flex;
  align-items: center;
  gap: 1rem;
  border-top: 1px solid rgba(255,255,255,0.05);
}

.social-links {
  display: flex;
  gap: 1rem;
  opacity: 0;
  transition: opacity 0.3s;
}

.sidebar:hover .social-links {
  opacity: 1;
}

.social-links a {
  color: var(--text-secondary);
  font-size: 1.2rem;
}

.social-links a:hover {
  color: var(--accent-electric);
}

/* Mobile Header */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 70px;
  background: rgba(2, 6, 23, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
  z-index: 850;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.5rem;
}

.mobile-brand {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.menu-toggle {
  background: transparent;
  border: none;
  color: var(--text-primary);
  font-size: 1.8rem;
  cursor: pointer;
}

/* ---------------------------------- */
/* Main Layout & Content              */
/* ---------------------------------- */
main {
  margin-left: var(--sidebar-collapsed);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: margin-left 0.4s;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

section {
  padding: 5rem 0;
}

/* ---------------------------------- */
/* Typography Scaling                 */
/* ---------------------------------- */
.h-xl { font-size: clamp(2.5rem, 5vw, 4.5rem); }
.h-lg { font-size: clamp(2rem, 4vw, 3rem); }
.h-md { font-size: clamp(1.5rem, 3vw, 2.2rem); }
.text-lg { font-size: clamp(1.1rem, 2vw, 1.25rem); color: var(--text-secondary); }

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-header h2 {
  margin-bottom: 1rem;
}

/* ---------------------------------- */
/* Hero Section                       */
/* ---------------------------------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 2rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
}

.hero-bg::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, rgba(2,6,23,0.3) 0%, rgba(2,6,23,1) 100%);
}

.hero-content {
  max-width: 800px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--glass-bg);
  border: 1px solid rgba(14, 165, 233, 0.3);
  border-radius: 50px;
  font-size: 0.875rem;
  color: var(--accent-electric);
  margin-bottom: 1.5rem;
  backdrop-filter: blur(10px);
}

.hero h1 {
  margin-bottom: 1.5rem;
}

.hero p {
  margin-bottom: 2.5rem;
  max-width: 600px;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* ---------------------------------- */
/* Services Grid                      */
/* ---------------------------------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.service-card {
  padding: 2.5rem 2rem;
  text-align: left;
}

.service-icon {
  width: 60px;
  height: 60px;
  border-radius: 12px;
  background: rgba(14, 165, 233, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--accent-electric);
  margin-bottom: 1.5rem;
}

.service-card h3 {
  margin-bottom: 1rem;
  font-size: 1.25rem;
}

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

.service-link {
  font-size: 0.9rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.service-link:hover {
  gap: 0.8rem;
}

/* ---------------------------------- */
/* Process Steps                      */
/* ---------------------------------- */
.process-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 2rem;
  position: relative;
}

.process-step {
  text-align: center;
  padding: 2rem;
}

.step-number {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--gradient-main);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 1.2rem;
  margin: 0 auto 1.5rem;
  box-shadow: 0 0 20px rgba(14,165,233,0.4);
}

.process-step h4 {
  margin-bottom: 0.5rem;
}

.process-step p {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

/* ---------------------------------- */
/* Testimonials                       */
/* ---------------------------------- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.review-card {
  padding: 2rem;
}

.stars {
  color: #fbbf24;
  margin-bottom: 1rem;
  font-size: 1.1rem;
}

.review-text {
  font-style: italic;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

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

.reviewer-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--bg-color-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-electric);
  font-weight: bold;
}

.reviewer-info h5 {
  font-size: 0.95rem;
}

.reviewer-info span {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* ---------------------------------- */
/* Pricing                            */
/* ---------------------------------- */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  align-items: center;
}

.price-card {
  padding: 3rem 2rem;
  text-align: center;
}

.price-card.featured {
  transform: scale(1.05);
  border-color: rgba(14, 165, 233, 0.4);
  box-shadow: 0 0 40px rgba(14, 165, 233, 0.1);
}

.price-card.featured:hover {
  transform: scale(1.05) translateY(-5px);
}

.price-header h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.price {
  font-size: 3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2rem;
}

.price span {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 400;
}

.price-features {
  list-style: none;
  margin-bottom: 2.5rem;
  text-align: left;
}

.price-features li {
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: var(--text-secondary);
}

.price-features i {
  color: var(--accent-green);
}

.price-card .btn {
  width: 100%;
}

/* ---------------------------------- */
/* Forms                              */
/* ---------------------------------- */
.form-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 3rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

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

label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
  color: var(--text-secondary);
  font-size: 0.9rem;
}

input, select, textarea {
  width: 100%;
  padding: 1rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: all 0.3s;
}

input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent-electric);
  box-shadow: 0 0 15px rgba(14, 165, 233, 0.2);
  background: rgba(255, 255, 255, 0.08);
}

option {
  background: var(--bg-color);
  color: var(--text-primary);
}

textarea {
  resize: vertical;
  min-height: 120px;
}

/* ---------------------------------- */
/* CTA Banner                         */
/* ---------------------------------- */
.cta-banner {
  background: linear-gradient(rgba(2,6,23,0.8), rgba(2,6,23,0.9)), url('images/professional-laptop-deep-cleaning-and-thermal-maintenance-se.png') center/cover;
  border-radius: 20px;
  padding: 4rem 2rem;
  text-align: center;
  margin: 4rem 0;
  border: 1px solid var(--glass-border);
}

.cta-banner h2 {
  margin-bottom: 1rem;
}

.cta-banner p {
  margin-bottom: 2rem;
  color: var(--text-secondary);
}

/* ---------------------------------- */
/* Footer                             */
/* ---------------------------------- */
footer {
  margin-top: auto;
  padding: 4rem 0 2rem;
  background: var(--bg-color-alt);
  border-top: 1px solid var(--glass-border);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand p {
  color: var(--text-secondary);
  margin-top: 1rem;
  font-size: 0.9rem;
}

.footer-links h4 {
  margin-bottom: 1.5rem;
  color: #fff;
}

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

.footer-links li {
  margin-bottom: 0.8rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--accent-electric);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.05);
  color: var(--text-secondary);
  font-size: 0.85rem;
}

/* ---------------------------------- */
/* Animations                         */
/* ---------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s cubic-bezier(0.5, 0, 0, 1);
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* ---------------------------------- */
/* Responsive Design                  */
/* ---------------------------------- */
@media (max-width: 1024px) {
  .price-card.featured {
    transform: none;
  }
  .price-card.featured:hover {
    transform: translateY(-5px);
  }
}

@media (max-width: 768px) {
  .scroll-progress {
    left: 0;
  }

  /* Sidebar transforms to off-canvas menu */
  .sidebar {
    transform: translateX(-100%);
    width: var(--sidebar-mobile) !important;
  }

  .sidebar.open {
    transform: translateX(0);
  }
  
  .sidebar-header {
    min-width: 100%;
  }
  
  .brand-name {
    opacity: 1;
  }
  
  .nav-link {
    min-width: 100%;
  }

  .nav-link span {
    opacity: 1;
    transform: translateX(0);
  }
  
  .social-links {
    opacity: 1;
  }

  /* Main content adjusts */
  main {
    margin-left: 0 !important;
    padding-top: 70px; /* Space for mobile header */
  }

  .mobile-header {
    display: flex;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .form-container {
    padding: 2rem 1.5rem;
  }

  .hero {
    text-align: center;
    padding-top: 4rem;
  }

  .hero-buttons {
    justify-content: center;
  }
  
  .cta-banner {
    padding: 3rem 1.5rem;
  }
}

@media (max-width: 480px) {
  .h-xl { font-size: 2rem; }
  .h-lg { font-size: 1.8rem; }
  .section-header { margin-bottom: 2.5rem; }
  section { padding: 3rem 0; }
  
  .btn {
    width: 100%;
  }
}