/* VK Corporation - Solar Business Website */
/* Theme: White, Blue & Green - Clean & Fresh */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;1,400;1,500&family=Playfair+Display:wght@500;600;700&display=swap');

:root {
  /* White & Light */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-card: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.95);
  
  /* Blue accents */
  --blue-primary: #0ea5e9;
  --blue-dark: #0284c7;
  --blue-light: #38bdf8;
  --blue-soft: rgba(14, 165, 233, 0.15);
  
  /* Green accents - eco/solar */
  --green-primary: #10b981;
  --green-dark: #059669;
  --green-light: #34d399;
  --green-soft: rgba(16, 185, 129, 0.15);
  
  /* Accent gradient */
  --accent-glow: rgba(14, 165, 233, 0.25);
  
  /* Neutrals */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #64748b;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #0ea5e9 0%, #10b981 100%);
  --gradient-soft: linear-gradient(135deg, rgba(14, 165, 233, 0.1) 0%, rgba(16, 185, 129, 0.1) 100%);
  --gradient-hero: linear-gradient(135deg, #f0f9ff 0%, #ecfdf5 50%, #ffffff 100%);
  
  /* Spacing */
  --nav-height: 80px;
  --section-padding: 100px;
  --container-max: 1280px;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Plus Jakarta Sans', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: 'Playfair Display', serif;
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-primary);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); margin-bottom: 1rem; }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

p {
  color: var(--text-secondary);
  font-size: 1.05rem;
}

/* Container */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 48px;
  z-index: 1000;
  transition: var(--transition-smooth);
  background: transparent;
}

.navbar.scrolled {
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  box-shadow: 0 4px 30px rgba(14, 165, 233, 0.08);
}

.logo {
  font-family: 'Playfair Display', serif;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.logo span {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  gap: 40px;
  list-style: none;
}

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

.nav-links a:hover,
.nav-links a.active {
  color: var(--blue-primary);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  transition: var(--transition-smooth);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-cta {
  background: var(--gradient-primary);
  color: white !important;
  padding: 12px 24px;
  border-radius: 10px;
  font-weight: 600;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px var(--accent-glow);
}

.nav-cta::after {
  display: none !important;
}

/* Mobile menu */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.menu-toggle span {
  width: 28px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition-smooth);
}

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

.hero-bg {
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
  z-index: 0;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(rgba(14, 165, 233, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(14, 165, 233, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--blue-soft);
  border: 1px solid rgba(14, 165, 233, 0.3);
  border-radius: 50px;
  font-size: 0.9rem;
  color: var(--blue-dark);
  margin-bottom: 24px;
  animation: fadeInUp 0.8s ease;
}

.hero h1 {
  animation: fadeInUp 0.8s ease 0.1s both;
  margin-bottom: 24px;
}

.hero h1 .highlight {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.2rem;
  animation: fadeInUp 0.8s ease 0.2s both;
  margin-bottom: 40px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease 0.3s both;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 16px 32px;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  border-radius: 12px;
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-smooth);
  border: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 40px var(--accent-glow);
  animation: btnPulse 1.5s ease infinite;
}

.btn-secondary {
  background: transparent;
  color: var(--blue-primary);
  border: 2px solid var(--blue-primary);
}

.btn-secondary:hover {
  background: var(--blue-soft);
  transform: translateY(-2px);
}

/* Stats bar */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  padding: 48px;
  background: white;
  border: 1px solid rgba(14, 165, 233, 0.15);
  border-radius: 24px;
  margin-top: 80px;
  box-shadow: 0 10px 40px rgba(14, 165, 233, 0.08);
}

.stat-item {
  text-align: center;
  transition: var(--transition-smooth);
}

.stat-item:hover {
  transform: translateY(-4px);
}

.stat-number {
  font-family: 'Playfair Display', serif;
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: block;
  margin-bottom: 4px;
}

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

/* Section styles */
section {
  padding: var(--section-padding) 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto 64px;
}

.section-tag {
  display: inline-block;
  color: var(--blue-primary);
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 3px;
  margin-bottom: 12px;
}

.section-header h2 {
  margin-bottom: 16px;
}

/* Cards */
.card-grid {
  display: grid;
  gap: 32px;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.card {
  background: var(--bg-card);
  border: 1px solid rgba(14, 165, 233, 0.1);
  border-radius: 24px;
  padding: 40px;
  transition: var(--transition-smooth);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.card:hover {
  transform: translateY(-12px);
  border-color: rgba(14, 165, 233, 0.25);
  box-shadow: 0 25px 50px rgba(14, 165, 233, 0.12);
}

.card-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-soft);
  border-radius: 16px;
  margin-bottom: 24px;
  font-size: 1.5rem;
  transition: var(--transition-smooth);
}

.card:hover .card-icon {
  transform: scale(1.1) rotate(5deg);
}

.card h3 {
  margin-bottom: 12px;
  color: var(--text-primary);
}

.card p {
  font-size: 0.95rem;
}

/* Product cards */
.product-card {
  background: white;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid rgba(14, 165, 233, 0.1);
  transition: var(--transition-smooth);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.product-card:hover {
  transform: translateY(-12px) scale(1.02);
  box-shadow: 0 30px 60px rgba(14, 165, 233, 0.15);
}

.product-image {
  height: 260px;
  background: var(--gradient-soft);
  overflow: hidden;
  position: relative;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-smooth);
}

.product-card:hover .product-image img {
  transform: scale(1.08);
}

.product-content {
  padding: 32px;
}

.product-content h3 {
  margin-bottom: 8px;
}

.product-content .price {
  font-size: 1.25rem;
  font-weight: 700;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.product-info {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 12px 0;
  line-height: 1.6;
}

/* About section */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  justify-content: center;
}

.about-image {
  position: relative;
  border-radius: 24px;
  overflow: hidden;
   aspect-ratio: 4/3; 
  background: var(--gradient-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 6rem; 
  
}

.about-content h2 {
  margin-bottom: 24px;
}

.about-content p {
  margin-bottom: 24px;
}
.about-content{
  text-align: justify;
  margin-left: auto;
}

.about-features {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 32px;
}

.about-feature {
  display: flex;
  align-items: center;
  gap: 16px;
}

.about-feature .check {
  width: 28px;
  height: 28px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: white;
  font-size: 0.9rem;
}

/* Contact form */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 80px;
  align-items: start;
}

.contact-info h2 {
  margin-bottom: 24px;
}

.contact-details {
  margin-top: 32px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 28px;
  padding: 20px;
  border-radius: 16px;
  transition: var(--transition-smooth);
}

.contact-item:hover {
  background: var(--gradient-soft);
}

.contact-item-icon {
  width: 52px;
  height: 52px;
  background: var(--gradient-soft);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.contact-item h4 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 4px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.contact-item p {
  color: var(--text-primary);
  margin: 0;
  font-size: 1rem;
}

.contact-item a {
  color: var(--blue-primary);
  text-decoration: none;
}

.contact-item a:hover {
  color: var(--green-primary);
  text-decoration: underline;
}

.contact-form {
  background: white;
  padding: 48px;
  border-radius: 24px;
  border: 1px solid rgba(14, 165, 233, 0.15);
  box-shadow: 0 10px 40px rgba(14, 165, 233, 0.08);
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: var(--text-primary);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 16px 20px;
  background: var(--bg-secondary);
  border: 1px solid rgba(14, 165, 233, 0.2);
  border-radius: 12px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--blue-primary);
  box-shadow: 0 0 0 3px var(--blue-soft);
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

.form-success, .form-error {
  padding: 16px;
  border-radius: 12px;
  margin-bottom: 20px;
  display: none;
}

.form-success {
  background: var(--green-soft);
  color: var(--green-dark);
  border: 1px solid var(--green-light);
}

.form-error {
  background: #fef2f2;
  color: #dc2626;
  border: 1px solid #fca5a5;
}

/* Footer */
.footer {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  padding: 80px 0 40px;
  margin-top: 80px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 64px;
}

.footer-brand .logo {
  margin-bottom: 20px;
}

.footer-brand .logo span {
  color: var(--blue-light);
  -webkit-text-fill-color: var(--blue-light);
}

.footer-brand p {
  font-size: 1rem;
  margin-bottom: 24px;
  color: white;
}

.footer h4 {
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  color: white;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 24px;
}

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

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  color: #94a3b8;
  text-decoration: none;
  transition: var(--transition-fast);
}

.footer-links a:hover {
  color: var(--blue-light);
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid rgba(148, 163, 184, 0.2);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom p {
  font-size: 0.9rem;
  margin: 0;
  color: #94a3b8;
}

/* Page hero */
.page-hero {
  padding: calc(var(--nav-height) + 120px) 0 80px;
  text-align: center;
  background: var(--gradient-hero);
}

.page-hero h1 {
  margin-bottom: 16px;
}

.page-hero p {
  max-width: 600px;
  margin: 0 auto;
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes btnPulse {
  0%, 100% { box-shadow: 0 8px 40px var(--accent-glow); }
  50% { box-shadow: 0 8px 50px rgba(14, 165, 233, 0.4); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.fade-in {
  animation: fadeInUp 0.6s ease both;
}

.animate-on-scroll {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger animation delays */
.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }

/* Responsive */
@media (max-width: 1024px) {
  .navbar {
    padding: 0 24px;
  }
  
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
    padding: 32px;
  }
  
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .nav-links.active {
    display: flex;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    padding: 24px;
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
  }
  
  .stats-bar {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .footer-brand {
    text-align: center;
  }
  
  .footer-bottom {
    flex-direction: column;
  }
}