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

:root {
  --primary-blue: #0d47a1;
  --secondary-blue: #1565c0;
  --accent-blue: #42a5f5;
  --dark-gray: #212121;
  --medium-gray: #616161;
  --light-gray: #f5f5f5;
  --white: #ffffff;
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a6a;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.7;
  color: var(--text-primary);
  background-color: var(--white);
}

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

a:hover {
  color: var(--accent-blue);
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header */
header {
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0,0,0,0.15);
}

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

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -0.5px;
}

.logo span {
  color: var(--accent-blue);
}

nav ul {
  display: flex;
  list-style: none;
  gap: 32px;
}

nav a {
  color: var(--white);
  font-weight: 500;
  padding: 8px 0;
  position: relative;
}

nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-blue);
  transition: width 0.3s ease;
}

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

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

/* Hero Section */
.hero {
  background: linear-gradient(135deg, #0d47a1 0%, #1976d2 50%, #42a5f5 100%);
  color: var(--white);
  padding: 80px 0;
  text-align: center;
}

.hero h1 {
  font-size: 2.75rem;
  font-weight: 700;
  margin-bottom: 20px;
  line-height: 1.2;
}

.hero p {
  font-size: 1.25rem;
  opacity: 0.95;
  max-width: 700px;
  margin: 0 auto 30px;
}

.btn {
  display: inline-block;
  background: var(--white);
  color: var(--primary-blue);
  padding: 14px 32px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 1rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.2);
  color: var(--primary-blue);
}

/* Sections */
section {
  padding: 70px 0;
}

section:nth-child(even) {
  background: var(--light-gray);
}

section h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--primary-blue);
}

section h3 {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 15px;
  color: var(--text-primary);
}

section p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-size: 1.05rem;
}

section ul {
  margin-left: 24px;
  margin-bottom: 20px;
}

section li {
  margin-bottom: 10px;
  color: var(--text-secondary);
}

/* Features Grid */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.feature-card {
  background: var(--white);
  padding: 30px;
  border-radius: 8px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0,0,0,0.12);
}

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

/* Steps */
.steps {
  counter-reset: step-counter;
}

.step {
  display: flex;
  gap: 20px;
  margin-bottom: 30px;
  padding: 25px;
  background: var(--white);
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.step::before {
  counter-increment: step-counter;
  content: counter(step-counter);
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 45px;
  height: 45px;
  background: var(--primary-blue);
  color: var(--white);
  border-radius: 50%;
  font-weight: 700;
  font-size: 1.2rem;
}

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

/* Footer */
footer {
  background: var(--dark-gray);
  color: var(--white);
  padding: 50px 0 30px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-section h4 {
  font-size: 1.1rem;
  margin-bottom: 16px;
  color: var(--accent-blue);
}

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

.footer-section li {
  margin-bottom: 10px;
}

.footer-section a {
  color: #b0bec5;
  font-size: 0.95rem;
}

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

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid #424242;
  color: #9e9e9e;
  font-size: 0.9rem;
}

/* Page Header */
.page-header {
  background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
  color: var(--white);
  padding: 60px 0;
  text-align: center;
}

.page-header h1 {
  font-size: 2.5rem;
  font-weight: 700;
}

/* Content Section */
.content-section {
  padding: 60px 0;
}

.content-section article {
  max-width: 800px;
  margin: 0 auto;
}

.content-section h2 {
  margin-top: 40px;
  margin-bottom: 16px;
}

.content-section h2:first-child {
  margin-top: 0;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1.1rem;
  }
  
  nav ul {
    gap: 16px;
  }
  
  nav a {
    font-size: 0.9rem;
  }
  
  .logo {
    font-size: 1.25rem;
  }
  
  section {
    padding: 50px 0;
  }
  
  .step {
    flex-direction: column;
    text-align: center;
  }
  
  .step::before {
    margin: 0 auto;
  }
}

@media (max-width: 480px) {
  header .container {
    flex-direction: column;
    gap: 16px;
  }
  
  nav ul {
    flex-wrap: wrap;
    justify-content: center;
  }
}