/* IT-NEX.US - Modern Professional Design */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --secondary: #8b5cf6;
  --accent: #06b6d4;
  --dark: #0f172a;
  --gray: #64748b;
  --light-gray: #f1f5f9;
  --white: #ffffff;
  --success: #10b981;
  --gradient: linear-gradient(135deg, #2563eb 0%, #8b5cf6 100%);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Inter', sans-serif;
  line-height: 1.6;
  color: var(--dark);
  background: var(--white);
  overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

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

p { margin-bottom: 1rem; color: var(--gray); }

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

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

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
}

.header.scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.nav {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  color: var(--dark);
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.nav-links a:hover {
  background: var(--light-gray);
  color: var(--primary);
}

.nav-links .btn {
  background: var(--gradient);
  color: var(--white);
  padding: 0.75rem 1.5rem;
}

.nav-links .btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(37, 99, 235, 0.3);
}

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--dark);
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient);
  position: relative;
  overflow: hidden;
  padding: 6rem 2rem 2rem;
}

.hero::before {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  top: -200px;
  right: -200px;
  animation: float 20s infinite ease-in-out;
}

.hero::after {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  bottom: -150px;
  left: -150px;
  animation: float 25s infinite ease-in-out reverse;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-30px) rotate(180deg); }
}

.hero-content {
  max-width: 1400px;
  text-align: center;
  color: var(--white);
  position: relative;
  z-index: 1;
}

.hero h1 {
  margin-bottom: 1.5rem;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.hero p {
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  color: rgba(255, 255, 255, 0.95);
  max-width: 700px;
  margin: 0 auto 2rem;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 1rem 2rem;
  border-radius: 12px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  text-align: center;
}

.btn-primary {
  background: var(--white);
  color: var(--primary);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
  color: var(--primary-dark);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.2);
  color: var(--white);
  border: 2px solid var(--white);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: var(--white);
  color: var(--primary);
}

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

.btn-outline:hover {
  background: var(--primary);
  color: var(--white);
}

/* Container */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Section */
.section {
  padding: 5rem 0;
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 4rem;
}

.section-title {
  margin-bottom: 1rem;
  color: var(--dark);
}

.section-subtitle {
  font-size: 1.2rem;
  color: var(--gray);
}

/* Cards Grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.card {
  background: var(--white);
  border-radius: 20px;
  padding: 2.5rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.card-icon {
  width: 60px;
  height: 60px;
  background: var(--gradient);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  font-size: 1.8rem;
  color: var(--white);
}

.card h3 {
  color: var(--dark);
  margin-bottom: 0.75rem;
}

.card p {
  color: var(--gray);
  line-height: 1.7;
}

/* Product Card Special */
.product-card {
  position: relative;
  overflow: hidden;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.product-card:hover::before {
  transform: scaleX(1);
}

/* Features List */
.features-list {
  list-style: none;
  margin: 1.5rem 0;
}

.features-list li {
  padding: 0.75rem 0;
  padding-left: 2rem;
  position: relative;
  color: var(--gray);
}

.features-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--success);
  font-weight: bold;
  font-size: 1.2rem;
}

/* Contact Section */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.contact-info {
  background: var(--light-gray);
  padding: 3rem;
  border-radius: 20px;
}

.contact-item {
  display: flex;
  align-items: start;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.contact-icon {
  width: 50px;
  height: 50px;
  background: var(--gradient);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1.5rem;
  flex-shrink: 0;
}

.contact-details h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.contact-details p {
  color: var(--gray);
  margin: 0;
}

.contact-details a {
  color: var(--primary);
  font-weight: 600;
}

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

.form-group label {
  display: block;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 1rem 1.5rem;
  border: 2px solid rgba(0, 0, 0, 0.1);
  border-radius: 12px;
  font-size: 1rem;
  font-family: inherit;
  transition: all 0.3s ease;
  background: var(--white);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

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

.form-alert {
  padding: 1rem 1.5rem;
  border-radius: 12px;
  margin-bottom: 1.5rem;
  display: none;
}

.form-alert.success {
  background: #d1fae5;
  color: #065f46;
  border: 2px solid #10b981;
}

.form-alert.error {
  background: #fee2e2;
  color: #991b1b;
  border: 2px solid #ef4444;
}

/* Footer */
.footer {
  background: var(--dark);
  color: rgba(255, 255, 255, 0.8);
  padding: 3rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer h3 {
  color: var(--white);
  margin-bottom: 1.5rem;
}

.footer ul {
  list-style: none;
}

.footer ul li {
  margin-bottom: 0.75rem;
}

.footer a {
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.3s ease;
}

.footer a:hover {
  color: var(--white);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 968px) {
  .nav-links {
    position: fixed;
    top: 80px;
    left: -100%;
    right: 0;
    bottom: 0;
    background: var(--white);
    flex-direction: column;
    padding: 2rem;
    transition: left 0.3s ease;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  }
  
  .nav-links.active {
    left: 0;
  }
  
  .mobile-toggle {
    display: block;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-cta {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 100%;
    max-width: 300px;
  }
}

@media (max-width: 640px) {
  .nav {
    padding: 1rem;
  }
  
  .section {
    padding: 3rem 0;
  }
  
  .cards-grid {
    grid-template-columns: 1fr;
  }
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* Utility Classes */
.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.text-gradient {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }