/* ============================================================
   Techvexa Electronics — Premium Modern Stylesheet
   ============================================================ */

/* ---- CSS Variables / Design Tokens ---- */
:root {
  --bg-primary: #080b14;
  --bg-secondary: #0d1117;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-card-hover: rgba(255, 255, 255, 0.08);
  --border-glass: rgba(255, 255, 255, 0.08);
  --color-primary: #00d4aa;
  --color-primary-rgb: 0, 212, 170;
  --color-secondary: #6366f1;
  --color-secondary-rgb: 99, 102, 241;
  --color-accent: #f472b6;
  --text-primary: #f0f0f0;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 24px;
  --shadow-glow: 0 0 40px rgba(var(--color-primary-rgb), 0.15);
  --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: var(--font);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: var(--color-primary); text-decoration: none; transition: var(--transition); }
a:hover { color: #33e0be; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ---- Container ---- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- Glass Card ---- */
.glass {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: var(--radius-lg);
  transition: var(--transition);
}
.glass:hover {
  background: var(--bg-card-hover);
  border-color: rgba(var(--color-primary-rgb), 0.2);
  box-shadow: var(--shadow-glow);
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 50px;
  font-family: var(--font);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-decoration: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  box-shadow: 0 4px 20px rgba(var(--color-primary-rgb), 0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(var(--color-primary-rgb), 0.5);
  color: #fff;
}
.btn-outline {
  background: transparent;
  border: 1.5px solid rgba(255,255,255,0.2);
  color: var(--text-primary);
}
.btn-outline:hover {
  background: rgba(255,255,255,0.05);
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.btn-small {
  padding: 10px 20px;
  font-size: 0.85rem;
  border-radius: 50px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
}
.btn-small:hover { color: #fff; transform: translateY(-1px); }

/* ---- Section Shared ---- */
.section {
  padding: 100px 0;
  position: relative;
}
.section-header {
  text-align: center;
  margin-bottom: 60px;
}
.section-tag {
  display: inline-block;
  background: rgba(var(--color-primary-rgb), 0.1);
  color: var(--color-primary);
  padding: 6px 18px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}
.section-title {
  font-size: clamp(2rem, 5vw, 2.8rem);
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.2;
}
.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
}
.gradient-text {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
}
.navbar.scrolled {
  background: rgba(8, 11, 20, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glass);
  padding: 12px 0;
}
.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}
.logo-icon {
  font-size: 1.6rem;
}
.logo-text {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-primary);
}
.logo-accent {
  color: var(--color-primary);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-link {
  color: var(--text-secondary);
  font-size: 0.92rem;
  font-weight: 500;
  position: relative;
  padding: 4px 0;
  text-decoration: none;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  border-radius: 2px;
  transition: width 0.3s ease;
}
.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
}
.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 120px 24px 80px;
}
.hero-gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 50% at 20% 50%, rgba(var(--color-primary-rgb), 0.12) 0%, transparent 70%),
    radial-gradient(ellipse 50% 60% at 80% 30%, rgba(var(--color-secondary-rgb), 0.10) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 50% 80%, rgba(244,114,182, 0.06) 0%, transparent 70%);
  pointer-events: none;
}
.hero-particles {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero-particles .particle {
  position: absolute;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-primary);
  opacity: 0;
  animation: particleFloat 8s infinite;
}
@keyframes particleFloat {
  0%   { opacity: 0; transform: translateY(0) scale(0); }
  10%  { opacity: 0.6; }
  90%  { opacity: 0; }
  100% { opacity: 0; transform: translateY(-600px) scale(1); }
}
.hero-content {
  position: relative;
  text-align: center;
  max-width: 820px;
  z-index: 1;
}
.hero-badge {
  display: inline-block;
  background: rgba(var(--color-primary-rgb), 0.1);
  border: 1px solid rgba(var(--color-primary-rgb), 0.2);
  color: var(--color-primary);
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  margin-bottom: 24px;
  animation: fadeInUp 0.8s ease forwards;
}
.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.2rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 24px;
  animation: fadeInUp 0.8s 0.15s ease both;
}
.hero-subtitle {
  color: var(--text-secondary);
  font-size: 1.15rem;
  max-width: 620px;
  margin: 0 auto 36px;
  line-height: 1.8;
  animation: fadeInUp 0.8s 0.3s ease both;
}
.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s 0.45s ease both;
}
.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  margin-top: 60px;
  animation: fadeInUp 0.8s 0.6s ease both;
}
.stat { text-align: center; }
.stat-number {
  font-size: 2.2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-suffix {
  font-size: 1.8rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label {
  display: block;
  color: var(--text-muted);
  font-size: 0.85rem;
  font-weight: 500;
  margin-top: 4px;
}
.stat-divider {
  width: 1px;
  height: 40px;
  background: rgba(255,255,255,0.1);
}

/* ============================================================
   ABOUT
   ============================================================ */
.about-section {
  background: var(--bg-secondary);
}
.about-grid {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: 48px;
  align-items: start;
}
.about-text p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-size: 1.05rem;
}
.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 24px;
}
.about-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.95rem;
}
.about-feature i {
  color: var(--color-primary);
  font-size: 1.1rem;
}
.about-card {
  padding: 40px 32px;
  text-align: center;
}
.about-card-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}
.about-card h3 {
  font-size: 1.3rem;
  margin-bottom: 12px;
}
.about-card p {
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.8;
}

/* ============================================================
   SERVICES
   ============================================================ */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  padding: 36px 28px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  opacity: 0;
  transition: opacity 0.3s ease;
}
.service-card:hover::before { opacity: 1; }
.service-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(var(--color-primary-rgb), 0.15), rgba(var(--color-secondary-rgb), 0.15));
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.5rem;
  color: var(--color-primary);
}
.service-card h3 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}
.service-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ============================================================
   PRODUCTS
   ============================================================ */
.products-section {
  background: var(--bg-secondary);
}
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.product-card {
  padding: 0;
  overflow: hidden;
  cursor: pointer;
}
.product-image {
  height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(var(--color-primary-rgb), 0.08), rgba(var(--color-secondary-rgb), 0.08));
  font-size: 3rem;
  color: var(--color-primary);
  transition: var(--transition);
}
.product-card:hover .product-image {
  background: linear-gradient(135deg, rgba(var(--color-primary-rgb), 0.15), rgba(var(--color-secondary-rgb), 0.15));
}
.product-info {
  padding: 20px 24px;
}
.product-info h3 {
  font-size: 1.1rem;
  margin-bottom: 6px;
}
.product-info p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 12px;
}
.product-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(var(--color-primary-rgb), 0.1);
  color: var(--color-primary);
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.contact-info-cards {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.contact-info-card {
  padding: 28px;
  display: flex;
  align-items: flex-start;
  gap: 20px;
}
.contact-icon {
  width: 52px;
  height: 52px;
  min-width: 52px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(var(--color-primary-rgb), 0.15), rgba(var(--color-secondary-rgb), 0.15));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--color-primary);
}
.contact-info-card h3 {
  font-size: 1rem;
  margin-bottom: 6px;
}
.contact-info-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}
.contact-map {
  min-height: 360px;
  overflow: hidden;
  padding: 0;
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-glass);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.5fr;
  gap: 48px;
  padding-bottom: 40px;
}
.footer-brand p {
  color: var(--text-secondary);
  margin-top: 16px;
  font-size: 0.95rem;
  line-height: 1.7;
}
.footer-socials {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}
.footer-socials a {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 0.95rem;
  transition: var(--transition);
}
.footer-socials a:hover {
  background: rgba(var(--color-primary-rgb), 0.1);
  border-color: rgba(var(--color-primary-rgb), 0.3);
  color: var(--color-primary);
  transform: translateY(-2px);
}
.footer-links h4, .footer-contact h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-primary);
}
.footer-links a {
  display: block;
  color: var(--text-secondary);
  font-size: 0.92rem;
  padding: 5px 0;
  transition: var(--transition);
}
.footer-links a:hover {
  color: var(--color-primary);
  padding-left: 6px;
}
.footer-contact p {
  color: var(--text-secondary);
  font-size: 0.92rem;
  margin-bottom: 10px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.footer-contact p i {
  color: var(--color-primary);
  margin-top: 4px;
  min-width: 16px;
}
.footer-contact p a {
  color: var(--text-secondary);
}
.footer-contact p a:hover {
  color: var(--color-primary);
}
.footer-bottom {
  border-top: 1px solid var(--border-glass);
  padding: 20px 0;
  text-align: center;
}
.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* ============================================================
   BACK TO TOP
   ============================================================ */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: var(--transition);
  z-index: 999;
  box-shadow: 0 4px 20px rgba(var(--color-primary-rgb), 0.3);
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(var(--color-primary-rgb), 0.5);
}

/* ============================================================
   ANIMATIONS
   ============================================================ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .about-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .products-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: rgba(8, 11, 20, 0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border-glass);
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  .services-grid { grid-template-columns: 1fr; }
  .products-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .about-features { grid-template-columns: 1fr; }
  .hero-stats { gap: 20px; flex-wrap: wrap; }
  .hero { padding: 100px 16px 60px; }
}