/* ============================================
   KlimaKönig Website - Modern CSS
   Designed with Trust & Sustainability
   ============================================ */

/* Import LEMON MILK font (using a fallback until the actual font is loaded) */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600;700;800&display=swap');

/* Custom Properties - Brand Colors from Logo */
:root {
  /* Primary Colors */
  --primary-green: #3a5c36;
  --primary-green-light: #718a68;
  --primary-brown: #4a3632;
  --primary-dark: #2d201d;
  
  /* Accent & UI Colors */
  --accent-green: #5a8c50;
  --accent-gold: #d4af37;
  --background-light: #f8f9fa;
  --background-white: #ffffff;
  --text-dark: #2d201d;
  --text-gray: #6c757d;
  --text-light: #adb5bd;
  
  /* Shadows & Overlays */
  --shadow-sm: 0 2px 4px rgba(45, 32, 29, 0.1);
  --shadow-md: 0 4px 12px rgba(45, 32, 29, 0.15);
  --shadow-lg: 0 8px 24px rgba(45, 32, 29, 0.2);
  --overlay-dark: rgba(45, 32, 29, 0.7);
  
  /* Typography */
  --font-primary: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-display: 'Montserrat', -apple-system, sans-serif;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* ============================================
   Reset & Base Styles
   ============================================ */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  color: var(--text-dark);
  line-height: 1.6;
  background-color: var(--background-white);
  overflow-x: hidden;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition-normal);
}

ul, ol {
  list-style: none;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
  color: var(--primary-dark);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
}

h4 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
  font-weight: 600;
}

p {
  margin-bottom: var(--spacing-sm);
  color: var(--text-gray);
  font-size: 1.125rem;
}

.lead {
  font-size: 1.25rem;
  font-weight: 300;
  color: var(--text-gray);
}

/* ============================================
   Layout Utilities
   ============================================ */

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

.container-wide {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

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

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

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

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  transition: var(--transition-normal);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.nav-logo {
  height: 50px;
  transition: var(--transition-normal);
}

.nav-logo:hover {
  transform: scale(1.05);
}

.nav-menu {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.nav-link {
  font-weight: 500;
  color: var(--text-dark);
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background-color: var(--primary-green);
  transition: var(--transition-normal);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 80%;
}

.nav-link:hover {
  color: var(--primary-green);
}

.nav-cta {
  background: linear-gradient(135deg, var(--primary-green), var(--accent-green));
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: 50px;
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  color: white;
}

.nav-cta::after {
  display: none;
}

/* Mobile Menu Toggle */
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-toggle span {
  width: 25px;
  height: 3px;
  background-color: var(--primary-dark);
  transition: var(--transition-fast);
  border-radius: 2px;
}

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

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, rgba(58, 92, 54, 0.95), rgba(113, 138, 104, 0.9)),
              url('https://images.unsplash.com/photo-1497366216548-37526070297c?q=80&w=2000') center/cover;
  color: white;
  padding-top: 80px;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 30% 50%, rgba(212, 175, 55, 0.1), transparent 50%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
}

.hero h1 {
  color: white;
  margin-bottom: var(--spacing-md);
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.hero .lead {
  color: rgba(255, 255, 255, 0.95);
  margin-bottom: var(--spacing-lg);
  font-size: 1.5rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.stat-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  padding: var(--spacing-md);
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  text-align: center;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--accent-gold);
  display: block;
  margin-bottom: 0.5rem;
}

.stat-label {
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.9rem;
}

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

.btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1.125rem;
  cursor: pointer;
  border: none;
  transition: var(--transition-normal);
  text-align: center;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-green), var(--accent-green));
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
  background: transparent;
  color: white;
}

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

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

.btn-group {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

/* ============================================
   Cards
   ============================================ */

.card {
  background: white;
  border-radius: 16px;
  padding: var(--spacing-md);
  box-shadow: var(--shadow-md);
  transition: var(--transition-normal);
  height: 100%;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.card-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--primary-green-light), var(--primary-green));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-sm);
  font-size: 2rem;
}

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

.card p {
  color: var(--text-gray);
}

.card-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
  border-radius: 12px;
  margin-bottom: var(--spacing-sm);
}

/* ============================================
   Grid Layouts
   ============================================ */

.grid {
  display: grid;
  gap: var(--spacing-md);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

/* ============================================
   Trust Elements
   ============================================ */

.trust-badges {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  margin: var(--spacing-lg) 0;
}

.badge {
  background: white;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: 50px;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
  color: var(--text-dark);
}

.badge-icon {
  color: var(--accent-gold);
  font-size: 1.5rem;
}

/* ============================================
   Forms
   ============================================ */

.form-group {
  margin-bottom: var(--spacing-md);
}

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

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 1rem;
  border: 2px solid #e0e0e0;
  border-radius: 12px;
  font-size: 1rem;
  font-family: var(--font-primary);
  transition: var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary-green);
  box-shadow: 0 0 0 3px rgba(58, 92, 54, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 150px;
}

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

.footer {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary-brown));
  color: white;
  padding: var(--spacing-xl) 0 var(--spacing-md);
}

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

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

.footer p,
.footer a {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.95rem;
}

.footer a:hover {
  color: var(--accent-gold);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-md);
  text-align: center;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
}

.social-links {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
}

.social-link {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}

.social-link:hover {
  background: var(--accent-gold);
  transform: translateY(-3px);
}

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

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background: white;
    flex-direction: column;
    padding: var(--spacing-lg);
    transition: var(--transition-normal);
    box-shadow: var(--shadow-lg);
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .mobile-toggle {
    display: flex;
  }
  
  .hero {
    min-height: 80vh;
  }
  
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .btn-group {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
  }
}

/* ============================================
   Animations
   ============================================ */

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

.fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

.pulse {
  animation: pulse 2s infinite;
}

/* ============================================
   Utility Classes
   ============================================ */

.text-center {
  text-align: center;
}

.text-primary {
  color: var(--primary-green);
}

.text-accent {
  color: var(--accent-gold);
}

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }