/* Grundstil */
*,
*::before,
*::after {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: 'Inter', sans-serif;
  line-height: 1.6;
  color: #0d1b2a;
  background-color: #f7f9fc;
  /* verhindert horizontales Scrollen auf mobilen Geräten, wenn die Navigation ausklappt */
  overflow-x: hidden;
}
h1, h2, h3 {
  font-weight: 600;
  margin-top: 0;
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: #0d1b2a;
  color: #ffffff;
  padding: 8px 16px;
  z-index: 100;
  transition: top 0.3s ease;
}
.skip-link:focus {
  top: 0;
}

/* Navigation */
.site-header {
  background: #ffffff;
  border-bottom: 1px solid #e6ecf3;
  position: sticky;
  top: 0;
  z-index: 99;
}
.navbar {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: #0d1b2a;
}
.nav-links {
  list-style: none;
  display: flex;
  gap: 24px;
}
.nav-links a {
  text-decoration: none;
  color: #0d1b2a;
  font-weight: 500;
  transition: color 0.3s ease;
}
.nav-links a:hover,
.nav-links a:focus {
  color: #0066cc;
}
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
}
.hamburger,
.hamburger::before,
.hamburger::after {
  display: block;
  width: 24px;
  height: 3px;
  background: #0d1b2a;
  border-radius: 2px;
  position: relative;
}
.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
  transition: transform 0.3s ease;
}
.hamburger::before {
  top: -8px;
}
.hamburger::after {
  top: 8px;
}

/* Hero Section */
.hero-section {
  background: linear-gradient(145deg, #0d1b2a 0%, #1b263b 100%);
  color: #ffffff;
  padding: 80px 24px;
  text-align: center;
}
.hero-content {
  max-width: 800px;
  margin: 0 auto;
}
.hero-section h1 {
  font-size: 2.5rem;
  margin-bottom: 16px;
}
.hero-subtitle {
  font-size: 1.125rem;
  margin-bottom: 32px;
  color: #b0c4de;
}
.cta-button {
  display: inline-block;
  background: #0082c9;
  color: #ffffff;
  padding: 12px 24px;
  border-radius: 4px;
  text-decoration: none;
  font-weight: 600;
  transition: background 0.3s ease;
}
.cta-button:hover,
.cta-button:focus {
  background: #0066a0;
}

/* Sections */
section {
  padding: 64px 24px;
  max-width: 1200px;
  margin: 0 auto;
}
.services-section h2,
.benefits-section h2,
.about-section h2,
.contact-section h2 {
  text-align: center;
  margin-bottom: 32px;
}

/* Services Grid */
.service-grid {
  display: grid;
  gap: 24px;
}
.service-item {
  background: #ffffff;
  padding: 24px;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.service-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}
.service-item h3 {
  margin-bottom: 16px;
  color: #0d1b2a;
}
.service-item p {
  margin: 0;
}

/* Benefits Grid */
.benefit-grid {
  display: grid;
  gap: 24px;
}
.benefit-item {
  background: #ffffff;
  padding: 24px;
  border-left: 4px solid #0082c9;
  border-radius: 4px;
}
.benefit-item h3 {
  margin-bottom: 8px;
  color: #0d1b2a;
}

/* About Section */
.about-section p {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

/* Contact Form */
.contact-section {
  background: #eef4fa;
  border-top: 1px solid #e6ecf3;
  border-bottom: 1px solid #e6ecf3;
}
.contact-form {
  max-width: 600px;
  margin: 0 auto;
}
.form-group {
  margin-bottom: 16px;
}
.form-group label {
  display: block;
  margin-bottom: 4px;
  font-weight: 600;
}
.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid #c4d3e5;
  border-radius: 4px;
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: #0082c9;
  outline: none;
}
.submit-button {
  display: inline-block;
  background: #0082c9;
  color: #ffffff;
  padding: 12px 24px;
  border: none;
  border-radius: 4px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.3s ease;
}
.submit-button:hover,
.submit-button:focus {
  background: #0066a0;
}

/* Footer */
.site-footer {
  background: #0d1b2a;
  color: #ffffff;
  text-align: center;
  padding: 24px;
  font-size: 0.875rem;
}

/* Responsive */
@media (min-width: 600px) {
  .service-grid,
  .benefit-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 900px) {
  .service-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  .benefit-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .hero-section h1 {
    font-size: 3rem;
  }
}

/* Navigation Mobile */
@media (max-width: 800px) {
  .nav-toggle {
    display: block;
  }
  .nav-links {
    flex-direction: column;
    gap: 16px;
    position: absolute;
    right: 0;
    top: 64px;
    background: #ffffff;
    width: 200px;
    padding: 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    transform: translateX(100%);
    transition: transform 0.3s ease;
  }
  .nav-links.open {
    transform: translateX(0);
  }
  .nav-links a {
    padding: 8px 0;
    border-bottom: 1px solid #e6ecf3;
  }
  .nav-links a:last-child {
    border-bottom: none;
  }
}