/* ============================================
   TuS Kaltehardt - Design System & Styles
   ============================================ */

/* CSS Variables for Design System */
:root {
  --primary-blue: #174594;
  --primary-blue-light: rgba(23, 69, 148, 0.45);
  --text-dark: #333333;
  --text-light: #666666;
  --white: #ffffff;
  --light-gray: #f5f5f5;
  --border-color: #e0e0e0;
  
  /* Typography */
  --font-heading: 'Montserrat', 'Inter', sans-serif;
  --font-body: 'Open Sans', 'Inter', sans-serif;
  --font-size-h1: 3.5rem;
  --font-size-h2: 2.5rem;
  --font-size-h3: 1.75rem;
  --font-size-body: 1rem;
  --font-size-small: 0.875rem;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
}

/* ============================================
   Global Styles
   ============================================ */

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

html {
  scroll-behavior: smooth;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: var(--font-size-h1);
}

h2 {
  font-size: var(--font-size-h2);
}

h3 {
  font-size: var(--font-size-h3);
}

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

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

a:hover {
  color: #0d2e5c;
}

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

/* ============================================
   Header & Navigation
   ============================================ */

header {
  position: sticky;
  top: 0;
  background-color: var(--white);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.header-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  height: 50px;
  width: auto;
  transition: opacity 0.3s ease;
}

.logo:hover {
  opacity: 0.8;
}

nav ul {
  list-style: none;
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

nav a {
  font-size: var(--font-size-small);
  font-weight: 600;
  color: var(--text-dark);
  transition: color 0.3s ease;
}

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

.nav-cta {
  background-color: var(--primary-blue);
  color: var(--white);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-full);
  font-weight: 600;
  transition: background-color 0.3s ease;
}

.nav-cta:hover {
  background-color: #0d2e5c;
  color: var(--white);
}

.language-switcher {
  display: flex;
  gap: var(--spacing-sm);
  margin-left: var(--spacing-lg);
}

.language-switcher button {
  background: none;
  border: 1px solid var(--border-color);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: var(--font-size-small);
  transition: all 0.3s ease;
}

.language-switcher button.active {
  background-color: var(--primary-blue);
  color: var(--white);
  border-color: var(--primary-blue);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.5rem;
  color: var(--text-dark);
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
  position: relative;
  height: 600px;
  background: linear-gradient(135deg, #000 0%, #333 100%);
  background-image: url('../images/P1470263-scaled.jpg');
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--white);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--primary-blue-light);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 600px;
  padding: var(--spacing-lg);
}

.hero h1 {
  font-size: var(--font-size-h1);
  margin-bottom: var(--spacing-md);
  color: var(--white);
}

.hero-subtitle {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-lg);
  color: var(--white);
  font-weight: 300;
}

.hero-cta {
  display: inline-flex;
  gap: var(--spacing-md);
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--font-size-small);
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
  border: 2px solid transparent;
  text-decoration: none;
}

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

.btn-primary:hover {
  background-color: #0d2e5c;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(23, 69, 148, 0.3);
}

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

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

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

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

/* ============================================
   Container & Sections
   ============================================ */

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

section {
  padding: var(--spacing-2xl) 0;
}

section.light-bg {
  background-color: var(--light-gray);
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-title h2 {
  margin-bottom: var(--spacing-md);
}

.section-title p {
  font-size: 1.1rem;
  color: var(--text-light);
}

/* ============================================
   About Section
   ============================================ */

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
}

.about-text h3 {
  color: var(--primary-blue);
  margin-bottom: var(--spacing-md);
}

.about-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.about-image img {
  width: 100%;
  height: auto;
}

/* ============================================
   Events Section
   ============================================ */

.events-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.event-card {
  background-color: var(--white);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all 0.3s ease;
}

.event-card:hover {
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
  transform: translateY(-4px);
}

.event-date {
  display: inline-block;
  background-color: var(--primary-blue);
  color: var(--white);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-small);
}

.event-card h3 {
  margin-bottom: var(--spacing-sm);
}

.event-card p {
  margin-bottom: var(--spacing-md);
}

/* ============================================
   Training Section
   ============================================ */

.training-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.training-card {
  background-color: var(--light-gray);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--primary-blue);
}

.training-card h3 {
  color: var(--primary-blue);
  margin-bottom: var(--spacing-sm);
}

.training-time {
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: var(--spacing-sm);
}

.training-contact {
  font-size: var(--font-size-small);
  color: var(--text-light);
}

/* ============================================
   Gallery Section
   ============================================ */

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
}

.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  aspect-ratio: 1;
  cursor: pointer;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.gallery-item:hover img {
  transform: scale(1.05);
}

.gallery-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(23, 69, 148, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.gallery-item:hover .gallery-overlay {
  opacity: 1;
}

.gallery-overlay-icon {
  color: var(--white);
  font-size: 2rem;
}

/* ============================================
   Contact Section
   ============================================ */

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.contact-item {
  display: flex;
  gap: var(--spacing-md);
}

.contact-icon {
  font-size: 1.5rem;
  color: var(--primary-blue);
  min-width: 30px;
}

.contact-details h4 {
  margin-bottom: var(--spacing-xs);
  color: var(--text-dark);
}

.contact-details p {
  margin: 0;
  font-size: var(--font-size-small);
}

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group label {
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--text-dark);
}

.form-group input,
.form-group textarea {
  padding: var(--spacing-sm);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: var(--font-size-body);
  transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(23, 69, 148, 0.1);
}

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

/* ============================================
   Footer
   ============================================ */

footer {
  background-color: var(--text-dark);
  color: var(--white);
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
  margin-top: var(--spacing-2xl);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
}

.footer-section h4 {
  margin-bottom: var(--spacing-md);
  color: var(--white);
}

.footer-section p {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--spacing-sm);
}

.footer-section a {
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.3s ease;
}

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

.social-links {
  display: flex;
  gap: var(--spacing-md);
}

.social-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  transition: background-color 0.3s ease;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-bottom p {
  margin: 0;
  font-size: var(--font-size-small);
}

.footer-links {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.footer-links a {
  font-size: var(--font-size-small);
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
  :root {
    --font-size-h1: 2.5rem;
    --font-size-h2: 1.75rem;
    --font-size-h3: 1.25rem;
  }

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

  nav ul {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: var(--white);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    gap: var(--spacing-md);
  }

  nav ul.active {
    display: flex;
  }

  .menu-toggle {
    display: block;
  }

  .hero {
    height: 400px;
  }

  .about-content {
    grid-template-columns: 1fr;
  }

  .contact-wrapper {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-links {
    width: 100%;
  }
}

@media (max-width: 480px) {
  :root {
    --font-size-h1: 2rem;
    --font-size-h2: 1.5rem;
    --spacing-lg: 1.5rem;
    --spacing-2xl: 2rem;
  }

  .header-container {
    padding: var(--spacing-sm);
  }

  .logo {
    height: 40px;
  }

  nav ul {
    padding: var(--spacing-md);
  }

  .hero {
    height: 300px;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  .events-grid,
  .training-grid,
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .footer-content {
    grid-template-columns: 1fr;
  }
}