/* CSS Variables */
:root {
  --color-primary: #2d5a3d;
  --color-primary-dark: #1e3d29;
  --color-primary-light: #4a7c5c;
  --color-accent: #3d7a52;
  --color-background: #f5f5f5;
  --color-background-alt: #eaeaea;
  --color-surface: #ffffff;
  --color-text: #2c2c2c;
  --color-text-light: #5a5a5a;
  --color-border: #d9d9d9;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-family-heading: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --max-width: 1100px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 5rem;
}

/* Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-background);
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

/* Container */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

/* Typography */
h1, h2, h3 {
  font-family: var(--font-family-heading);
  font-weight: 400;
  line-height: 1.3;
  color: var(--color-text);
}

h1 {
  font-size: 2.25rem;
}

h2 {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-md);
}

h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xs);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
  font-weight: 500;
  text-align: center;
  border-radius: 4px;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
}

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

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

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

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

/* Header */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
}

header nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 70px;
}

.logo {
  font-family: var(--font-family-heading);
  font-size: 1.25rem;
  color: var(--color-text);
  font-weight: 400;
}

.logo:hover {
  color: var(--color-primary);
}

.nav-links {
  display: none;
  list-style: none;
  gap: var(--spacing-md);
}

.nav-links a {
  color: var(--color-text-light);
  font-size: 0.95rem;
}

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

/* Mobile Menu Toggle */
.mobile-menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0;
}

.mobile-menu-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  transition: all 0.3s ease;
}

.mobile-menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* Hero */
.hero {
  padding: calc(70px + var(--spacing-xl)) 0 var(--spacing-xl);
  background-color: var(--color-surface);
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--spacing-md);
}

.hero-portrait {
  width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--color-primary);
}

.hero-text {
  max-width: 600px;
}

.hero h1 {
  margin-bottom: var(--spacing-sm);
}

.tagline {
  font-size: 1.25rem;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-md);
}

/* Services */
.services {
  padding: var(--spacing-xl) 0;
  background-color: var(--color-background);
}

.services h2 {
  text-align: center;
}

.services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

.service-card {
  background-color: var(--color-surface);
  padding: var(--spacing-md);
  border-radius: 8px;
  border: 1px solid var(--color-border);
  transition: box-shadow 0.2s ease;
}

.service-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.service-icon {
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary);
  color: white;
  border-radius: 8px;
  margin-bottom: var(--spacing-sm);
  font-size: 1.25rem;
}

.service-card h3 {
  color: var(--color-text);
}

.service-card p {
  color: var(--color-text-light);
  font-size: 0.95rem;
}

.service-card-link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.service-card-link:hover {
  color: inherit;
}

.service-card-link:hover .card-link {
  color: var(--color-primary-dark);
}

.card-link {
  display: block;
  margin-top: var(--spacing-sm);
  color: var(--color-primary);
  font-weight: 500;
  font-size: 0.9rem;
}

/* Training */
.training {
  padding: var(--spacing-xl) 0;
  background-color: var(--color-primary);
  color: white;
}

.training h2 {
  color: white;
}

.training-subtitle {
  font-size: 1.125rem;
  opacity: 0.9;
  margin-bottom: var(--spacing-sm);
}

.training ul {
  margin: var(--spacing-sm) 0 var(--spacing-md);
  padding-left: var(--spacing-md);
}

.training li {
  margin-bottom: var(--spacing-xs);
  opacity: 0.95;
}

.training .btn-secondary {
  border-color: white;
  color: white;
}

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

.training-buttons {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.training-buttons .btn {
  flex: 1;
  min-width: 180px;
}

/* Resources */
.resources {
  padding: var(--spacing-xl) 0;
  background-color: var(--color-surface);
}

.resources h2 {
  text-align: center;
}

.resources-subtitle {
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.resources-subtitle:first-of-type {
  margin-top: 0;
}

.resources-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-sm);
}

.resource-card {
  display: block;
  padding: var(--spacing-md);
  background-color: var(--color-background);
  border-radius: 8px;
  border: 1px solid var(--color-border);
  transition: all 0.2s ease;
  color: var(--color-text);
}

.resource-card:hover {
  border-color: var(--color-primary);
  color: var(--color-text);
}

.resource-card i {
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
  display: block;
}

.resource-card h3 {
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 600;
}

.resource-card p {
  color: var(--color-text-light);
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
}

/* Contact */
.contact {
  padding: var(--spacing-xl) 0;
  background-color: var(--color-background);
  text-align: center;
}

.contact p {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-md);
}

.email-link {
  display: inline-block;
  font-size: 1.25rem;
  font-weight: 500;
  margin-bottom: var(--spacing-md);
}

.social-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  color: var(--color-text-light);
  font-size: 1.25rem;
  transition: all 0.2s ease;
}

.social-links a:hover {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
}

.icon-codeberg {
  width: 1.25rem;
  height: 1.25rem;
  fill: currentColor;
}

/* Footer */
footer {
  padding: var(--spacing-md) 0;
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

footer p {
  color: var(--color-text-light);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-xs);
}

footer a {
  font-size: 0.875rem;
}

/* Tablet and up */
@media (min-width: 640px) {
  h1 {
    font-size: 2.75rem;
  }

  h2 {
    font-size: 2rem;
  }

  .container {
    padding: 0 var(--spacing-md);
  }

  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .resources-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Desktop */
@media (min-width: 900px) {
  h1 {
    font-size: 3rem;
  }

  .nav-links {
    display: flex;
  }

  .mobile-menu-toggle {
    display: none;
  }

  .services-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .resources-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .training-content {
    max-width: 700px;
  }
}

/* Page Header */
.page-header {
  padding: calc(70px + var(--spacing-lg)) 0 var(--spacing-lg);
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.page-header-green {
  background-color: var(--color-primary);
  color: white;
  border-bottom: none;
}

.page-header-green h1 {
  color: white;
  font-family: var(--font-family);
  font-weight: 600;
}

.page-header-green .page-subtitle {
  color: rgba(255, 255, 255, 0.9);
}

.page-header h1 {
  margin-bottom: var(--spacing-xs);
}

.page-subtitle {
  font-size: 1.25rem;
  color: var(--color-text-light);
}

.breadcrumb {
  font-size: 0.875rem;
  margin-bottom: var(--spacing-sm);
}

.breadcrumb a {
  color: var(--color-text-light);
}

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

/* Page Content */
.page-content {
  padding: var(--spacing-xl) 0;
}

.page-content h2 {
  margin-top: var(--spacing-lg);
}

.page-content h3 {
  margin-top: var(--spacing-md);
}

.content-block {
  margin-bottom: var(--spacing-lg);
}

.content-block h2 {
  margin-bottom: var(--spacing-sm);
}

.content-block h2 i {
  margin-right: var(--spacing-xs);
  color: var(--color-primary);
}

.content-block p {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-light);
}

.content-block ul {
  margin: var(--spacing-sm) 0;
  padding-left: var(--spacing-md);
  color: var(--color-text-light);
}

.content-block li {
  margin-bottom: var(--spacing-xs);
}

/* Two Column Layout */
.two-column {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

/* Feature Grid */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.feature {
  padding: var(--spacing-md);
  background-color: var(--color-background);
  border-radius: 8px;
}

.feature h3 {
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text);
}

.feature h3 i {
  margin-right: var(--spacing-xs);
  color: var(--color-primary);
}

.feature p {
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* Engagement Types */
.engagement-types {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  margin-top: var(--spacing-md);
}

.engagement {
  padding: var(--spacing-md);
  background-color: var(--color-background);
  border-left: 4px solid var(--color-primary);
}

.engagement h3 {
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.engagement p {
  margin-bottom: 0;
}

/* Course Modules */
.course-modules {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

.module {
  padding: var(--spacing-md);
  background-color: var(--color-background);
  border-radius: 8px;
}

.module h3 {
  font-family: var(--font-family);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary);
}

.module ul {
  margin: 0;
  padding-left: var(--spacing-md);
}

.module li {
  margin-bottom: var(--spacing-xs);
  color: var(--color-text-light);
}

/* Book List */
.book-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

.book {
  padding: var(--spacing-md);
  background-color: var(--color-background);
  border-radius: 8px;
}

.book h3 {
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text);
}

.book-author {
  font-size: 0.875rem;
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
}

.book p:last-child {
  margin-bottom: 0;
}

/* Book with cover image */
.book-with-cover {
  display: flex;
  gap: var(--spacing-md);
}

.book-cover {
  width: 120px;
  height: auto;
  border-radius: 4px;
  flex-shrink: 0;
  object-fit: contain;
  align-self: flex-start;
}

.book-details {
  flex: 1;
  min-width: 0;
}

.book-with-cover h3 {
  margin-top: 0;
}

@media (max-width: 639px) {
  .book-with-cover {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .book-cover {
    width: 140px;
  }

  .book-with-cover .book-details {
    text-align: left;
  }
}

/* Database Info */
.db-info {
  padding: var(--spacing-md);
  background-color: var(--color-background);
  border-radius: 8px;
  margin-top: var(--spacing-sm);
}

.db-info p {
  margin-bottom: var(--spacing-xs);
}

.db-info p:last-child {
  margin-bottom: 0;
}

/* CTA Block */
.cta-block {
  text-align: center;
  padding: var(--spacing-lg);
  background-color: var(--color-background);
  border-radius: 8px;
}

.cta-block h2 {
  margin-bottom: var(--spacing-sm);
}

.cta-block p {
  margin-bottom: var(--spacing-md);
}

/* Tablet and up - sub pages */
@media (min-width: 640px) {
  .two-column {
    grid-template-columns: repeat(2, 1fr);
  }

  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .engagement-types {
    grid-template-columns: repeat(3, 1fr);
  }

  .course-modules {
    grid-template-columns: repeat(2, 1fr);
  }

  .book-list:not(:has(.book-with-cover)) {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Imprint page */
.imprint {
  padding: calc(70px + var(--spacing-lg)) 0 var(--spacing-xl);
  background-color: var(--color-surface);
}

.imprint h1 {
  margin-bottom: var(--spacing-md);
}

.imprint h2 {
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  font-size: 1.5rem;
}

.imprint p {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-light);
}

.imprint address {
  font-style: normal;
  margin: var(--spacing-md) 0;
  line-height: 1.8;
}

/* Mobile nav active state */
@media (max-width: 899px) {
  .nav-links {
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-sm);
    gap: 0;
  }

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

  .nav-links li {
    border-bottom: 1px solid var(--color-border);
  }

  .nav-links li:last-child {
    border-bottom: none;
  }

  .nav-links a {
    display: block;
    padding: var(--spacing-sm);
  }
}