:root {
  --primary: #000000;
  --primary-hover: #1a1a1a;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --text: #0a0a0a;
  --text-secondary: #525252;
  --text-light: #737373;
  --bg: #ffffff;
  --bg-secondary: #f5f5f5;
  --border: #e5e5e5;
  --shadow: rgba(0, 0, 0, 0.1);
  --shadow-lg: rgba(0, 0, 0, 0.15);
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: linear-gradient(135deg, #ffffff 0%, #f0f7ff 50%, #e8f2ff 100%);
  min-height: 100vh;
  overflow-x: hidden;
}

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

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--primary);
  font-weight: 700;
  font-size: 1.5rem;
}

.logo {
  height: 40px;
  width: auto;
}

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

.nav-links a {
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.3s ease;
  padding: 0.5rem 0;
}

.nav-links a:hover {
  color: var(--accent);
}

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

/* Hero Section */
.hero {
  padding: 10rem 2rem 6rem;
  text-align: center;
  max-width: 1200px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 4.5rem;
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  color: var(--primary);
}

.hero .highlight {
  background: linear-gradient(135deg, var(--accent) 0%, #60a5fa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.5rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 3rem;
  line-height: 1.6;
}

.cta-button {
  display: inline-block;
  background: var(--primary);
  color: white;
  padding: 1rem 3rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1rem;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 10px 30px var(--shadow);
}

.cta-button:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 15px 40px var(--shadow-lg);
}

/* Features Section */
.features {
  padding: 6rem 2rem;
  background: rgba(255, 255, 255, 0.6);
}

.section-title {
  text-align: center;
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
  color: var(--primary);
}

.section-subtitle {
  text-align: center;
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 700px;
  margin: 0 auto 4rem;
}

.features-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.feature-card {
  background: white;
  padding: 2.5rem;
  border-radius: 20px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid var(--border);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  display: block;
}

.feature-card h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--primary);
}

.feature-card p {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* How it Works Section */
.how-it-works {
  padding: 6rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.steps-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 3rem;
  margin-top: 4rem;
}

.step {
  text-align: center;
  position: relative;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 70px;
  height: 70px;
  background: var(--accent);
  color: white;
  font-size: 2rem;
  font-weight: 800;
  border-radius: 50%;
  margin-bottom: 1.5rem;
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.3);
}

.step h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--primary);
}

.step p {
  color: var(--text-secondary);
  line-height: 1.7;
}

/* Contact Section */
.contact {
  padding: 6rem 2rem;
  background: linear-gradient(135deg, var(--primary) 0%, #1a1a1a 100%);
  color: white;
}

.contact-content {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
}

.contact h2 {
  color: white;
  margin-bottom: 1rem;
}

.contact p {
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 3rem;
  font-size: 1.1rem;
}

.contact-form {
  background: white;
  padding: 3rem;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.form-group {
  margin-bottom: 1.5rem;
  text-align: left;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text);
  font-size: 0.95rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 2px solid var(--border);
  border-radius: 10px;
  font-size: 1rem;
  font-family: inherit;
  transition: all 0.3s ease;
  background: var(--bg-secondary);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: white;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.submit-button {
  width: 100%;
  background: var(--accent);
  color: white;
  padding: 1rem;
  border: none;
  border-radius: 10px;
  font-weight: 700;
  font-size: 1.1rem;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.submit-button:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(59, 130, 246, 0.3);
}

/* Footer */
.footer {
  background: var(--primary);
  color: white;
  padding: 3rem 2rem 2rem;
  text-align: center;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-links a:hover {
  color: white;
}

.footer p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }

  .hero p {
    font-size: 1.1rem;
  }

  .section-title {
    font-size: 2rem;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: white;
    flex-direction: column;
    padding: 2rem;
    border-bottom: 1px solid var(--border);
    gap: 1rem;
  }

  .nav-links.active {
    display: flex;
  }

  .menu-toggle {
    display: block;
  }

  .features-grid,
  .steps-container {
    grid-template-columns: 1fr;
  }

  .contact-form {
    padding: 2rem;
  }
}

/* Smooth scroll */
html {
  scroll-behavior: smooth;
}

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

.hero,
.features,
.how-it-works,
.contact {
  animation: fadeInUp 0.8s ease-out;
}