/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.7;
  color: #1f2937;
  background-color: #ffffff;
  font-size: 17px;
}

/* Container */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

/* Header */
header {
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #e5e7eb;
  padding: 24px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 26px;
  font-weight: 700;
  color: #0f172a;
  text-decoration: none;
  letter-spacing: -0.02em;
  transition: color 0.2s ease;
}

.logo:hover {
  color: #2563eb;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 36px;
}

nav a {
  color: #64748b;
  text-decoration: none;
  font-size: 16px;
  font-weight: 500;
  transition: color 0.2s ease;
  position: relative;
}

nav a:hover {
  color: #2563eb;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: #2563eb;
  transition: width 0.2s ease;
}

nav a:hover::after {
  width: 100%;
}

/* Main Content */
main {
  min-height: calc(100vh - 200px);
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 100px 0 120px;
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
}

.hero h1 {
  font-size: 64px;
  font-weight: 800;
  margin-bottom: 28px;
  color: #0f172a;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.hero p {
  font-size: 22px;
  color: #475569;
  max-width: 720px;
  margin: 0 auto 40px;
  line-height: 1.6;
}

/* Content Section */
.content {
  max-width: 840px;
  margin: 0 auto;
  padding: 80px 32px;
}

.content h1 {
  font-size: 44px;
  font-weight: 800;
  margin-bottom: 32px;
  color: #0f172a;
  letter-spacing: -0.02em;
}

.content h2 {
  font-size: 32px;
  font-weight: 700;
  margin-top: 64px;
  margin-bottom: 24px;
  color: #0f172a;
  letter-spacing: -0.02em;
}

.content h3 {
  font-size: 24px;
  font-weight: 600;
  margin-top: 40px;
  margin-bottom: 16px;
  color: #1e293b;
}

.content p {
  margin-bottom: 24px;
  color: #475569;
  font-size: 17px;
  line-height: 1.8;
}

.content ul,
.content ol {
  margin-bottom: 24px;
  margin-left: 32px;
  color: #475569;
  line-height: 1.8;
}

.content li {
  margin-bottom: 12px;
  padding-left: 8px;
}

.content a {
  color: #2563eb;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

.content a:hover {
  color: #1d4ed8;
  text-decoration: underline;
}

/* Portfolio Section */
.portfolio {
  margin-top: 80px;
}

.product-card {
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 16px;
  padding: 40px;
  margin-bottom: 24px;
  transition: all 0.3s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
  border-color: #2563eb;
}

.product-card h3 {
  margin-top: 0;
  margin-bottom: 12px;
  font-size: 28px;
  color: #0f172a;
  font-weight: 700;
}

.product-card .status {
  display: inline-block;
  padding: 6px 14px;
  background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
  color: #1e40af;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 20px;
  letter-spacing: 0.01em;
}

.product-card p {
  color: #475569;
  margin-bottom: 12px;
  line-height: 1.7;
}

.product-card p strong {
  color: #2563eb;
  font-weight: 600;
}

/* Contact Form */
.contact-info {
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  border: 1px solid #e5e7eb;
  border-radius: 16px;
  padding: 48px;
  margin-top: 40px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
}

.contact-info h2 {
  margin-top: 0;
  color: #0f172a;
}

.contact-info p {
  font-size: 17px;
  margin-bottom: 20px;
  line-height: 1.7;
}

.contact-info a {
  color: #2563eb;
  text-decoration: none;
  font-weight: 600;
  transition: color 0.2s ease;
}

.contact-info a:hover {
  color: #1d4ed8;
}

/* Footer */
footer {
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  color: #cbd5e1;
  padding: 64px 0 32px;
  margin-top: 120px;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-section h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 20px;
  color: #f1f5f9;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-size: 13px;
}

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

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

.footer-section a {
  color: #94a3b8;
  text-decoration: none;
  font-size: 15px;
  transition: color 0.2s ease;
}

.footer-section a:hover {
  color: #60a5fa;
}

.footer-bottom {
  text-align: center;
  padding-top: 32px;
  border-top: 1px solid #334155;
  color: #94a3b8;
  font-size: 14px;
}

/* Responsive Design */
@media (max-width: 768px) {
  header .container {
    flex-direction: column;
    gap: 24px;
  }

  nav ul {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
  }

  .hero {
    padding: 60px 0 80px;
  }

  .hero h1 {
    font-size: 42px;
  }

  .hero p {
    font-size: 19px;
  }

  .content {
    padding: 60px 24px;
  }

  .content h1 {
    font-size: 36px;
  }

  .content h2 {
    font-size: 28px;
    margin-top: 48px;
  }

  .content h3 {
    font-size: 22px;
  }

  .footer-content {
    flex-direction: column;
    gap: 32px;
  }

  .product-card {
    padding: 32px 24px;
  }

  .contact-info {
    padding: 32px 24px;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 36px;
  }

  .hero p {
    font-size: 18px;
  }

  .content h1 {
    font-size: 32px;
  }

  nav ul {
    gap: 16px;
    font-size: 15px;
  }

  .product-card h3 {
    font-size: 24px;
  }
}

/* Responsive Design */
@media (max-width: 768px) {
  header .container {
    flex-direction: column;
    gap: 20px;
  }

  nav ul {
    flex-direction: column;
    gap: 15px;
    text-align: center;
  }

  .hero h1 {
    font-size: 32px;
  }

  .hero p {
    font-size: 18px;
  }

  .content h1 {
    font-size: 28px;
  }

  .content h2 {
    font-size: 24px;
  }

  .footer-content {
    flex-direction: column;
    gap: 30px;
  }

  .product-card {
    padding: 20px;
  }

  .contact-info {
    padding: 30px 20px;
  }
}