/* ===================================
   THERMOGREEN - Website Redesign
   Brand Style Guide Applied
   =================================== */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap');

/* --- CSS Custom Properties --- */
:root {
  --color-primary: #1B443F;
  --color-primary-dark: #122e2b;
  --color-primary-light: #24594f;
  --color-accent: #67C8B1;
  --color-accent-light: #8fd9c7;
  --color-accent-dark: #4fb89c;
  --color-text: #1D2228;
  --color-text-secondary: #464545;
  --color-bg: #FFFFFF;
  --color-surface: #f5f7f6;
  --color-border: #e0e5e3;
  --color-white: #FFFFFF;
  --color-black: #000000;

  --font-main: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-h1: clamp(2.2rem, 5vw, 3.5rem);
  --font-size-h2: clamp(1.6rem, 3vw, 2.4rem);
  --font-size-h3: clamp(1.2rem, 2vw, 1.5rem);
  --font-size-body: 1rem;
  --font-size-small: 0.875rem;

  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 48px;
  --space-2xl: 80px;

  --container: 1200px;
  --radius: 8px;
  --radius-lg: 16px;
  --transition: 0.25s ease;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  font-size: var(--font-size-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: color var(--transition); }
ul { list-style: none; }

/* --- Container --- */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* --- Typography --- */
h1, h2, h3, h4 { font-weight: 600; line-height: 1.2; color: var(--color-primary); }
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(--space-md); color: var(--color-text-secondary); }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 14px 32px;
  border-radius: var(--radius);
  font-family: var(--font-main);
  font-size: var(--font-size-body);
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
}
.btn-primary {
  background: var(--color-accent);
  color: var(--color-primary);
  border-color: var(--color-accent);
}
.btn-primary:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(103, 200, 177, 0.3);
}
.btn-secondary {
  background: transparent;
  color: var(--color-white);
  border-color: var(--color-white);
}
.btn-secondary:hover {
  background: var(--color-white);
  color: var(--color-primary);
}
.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-outline:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

/* ===================================
   HEADER
   =================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}
.site-header.scrolled {
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}
.logo img {
  height: 45px;
  width: auto;
}
.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.02em;
}
.logo-text span {
  color: var(--color-accent);
}
.main-nav ul {
  display: flex;
  gap: var(--space-lg);
}
.main-nav a {
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--color-text);
  position: relative;
  padding: var(--space-sm) 0;
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition);
}
.main-nav a:hover::after,
.main-nav a.active::after {
  width: 100%;
}
.main-nav a:hover, .main-nav a.active {
  color: var(--color-primary);
}
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}
.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  transition: all var(--transition);
}

/* ===================================
   HERO
   =================================== */
.hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  overflow: hidden;
  padding-top: 80px;
}
.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 70%;
  height: 200%;
  background: radial-gradient(ellipse, rgba(103, 200, 177, 0.15) 0%, transparent 70%);
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 650px;
}
.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(103, 200, 177, 0.2);
  border: 1px solid rgba(103, 200, 177, 0.3);
  border-radius: 50px;
  font-size: var(--font-size-small);
  font-weight: 500;
  color: var(--color-accent);
  margin-bottom: var(--space-lg);
}
.hero h1 {
  color: var(--color-white);
  margin-bottom: var(--space-md);
}
.hero h1 em {
  font-style: normal;
  color: var(--color-accent);
}
.hero-subtitle {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--space-xl);
  line-height: 1.7;
}
.hero-buttons {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}
.hero-image {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 50%;
  height: 80%;
  background: url('https://images.unsplash.com/photo-1600585154340-be6161a56a0c?w=1200&q=80') center/cover;
  border-radius: var(--radius-lg) 0 0 var(--radius-lg);
  opacity: 0.3;
}

/* ===================================
   SECTIONS
   =================================== */
.section {
  padding: var(--space-2xl) 0;
}
.section-dark {
  background: var(--color-primary);
  color: var(--color-white);
}
.section-dark h2, .section-dark h3 { color: var(--color-white); }
.section-dark p { color: rgba(255, 255, 255, 0.8); }
.section-light {
  background: var(--color-surface);
}
.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-xl);
}
.section-header p {
  margin-top: var(--space-md);
}
.section-label {
  display: inline-block;
  font-size: var(--font-size-small);
  font-weight: 600;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
}

/* ===================================
   PRODUCT GRID
   =================================== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
}
.product-card {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(27, 68, 63, 0.1);
  border-color: var(--color-accent);
}
.product-card-img {
  height: 200px;
  background: var(--color-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
}
.product-card-body {
  padding: var(--space-lg);
}
.product-card h3 {
  margin-bottom: var(--space-sm);
}
.product-card p {
  font-size: var(--font-size-small);
  margin-bottom: var(--space-md);
}
.card-link {
  font-weight: 600;
  color: var(--color-accent-dark);
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}
.card-link:hover { gap: var(--space-sm); }

/* ===================================
   STATS
   =================================== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-lg);
  text-align: center;
}
.stat-item h3 {
  font-size: 2.5rem;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}
.section-dark .stat-item h3 { color: var(--color-accent); }
.stat-item p {
  font-weight: 500;
}

/* ===================================
   SERVICES (Leistungen)
   =================================== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-lg);
}
.service-card {
  padding: var(--space-xl) var(--space-lg);
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  text-align: center;
  transition: all var(--transition);
}
.service-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 8px 30px rgba(27, 68, 63, 0.08);
}
.service-icon {
  width: 64px;
  height: 64px;
  background: rgba(103, 200, 177, 0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-md);
  font-size: 1.5rem;
}
.service-card h3 { margin-bottom: var(--space-sm); }

/* ===================================
   CTA BANNER
   =================================== */
.cta-banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  padding: var(--space-2xl) 0;
  text-align: center;
}
.cta-banner h2 {
  color: var(--color-white);
  margin-bottom: var(--space-md);
}
.cta-banner p {
  color: rgba(255, 255, 255, 0.85);
  max-width: 600px;
  margin: 0 auto var(--space-lg);
  font-size: 1.1rem;
}

/* ===================================
   REFERENCES
   =================================== */
.ref-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: var(--space-lg);
}
.ref-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}
.ref-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(27, 68, 63, 0.1);
}
.ref-card-img {
  height: 220px;
  background: var(--color-surface);
}
.ref-card-body {
  padding: var(--space-lg);
}

/* ===================================
   ABOUT / TEXT+IMAGE
   =================================== */
.text-image {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}
.text-image-content h2 { margin-bottom: var(--space-md); }
.text-image-visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
  min-height: 400px;
}

/* ===================================
   CONTACT
   =================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}
.contact-info h3 { margin-bottom: var(--space-lg); }
.contact-item {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}
.contact-item-icon {
  width: 48px;
  height: 48px;
  background: rgba(103, 200, 177, 0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.2rem;
}
.contact-form {
  background: var(--color-surface);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
}
.form-group { margin-bottom: var(--space-md); }
.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--space-xs);
  font-size: var(--font-size-small);
}
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-family: var(--font-main);
  font-size: var(--font-size-body);
  background: var(--color-bg);
  transition: border-color var(--transition);
}
.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(103, 200, 177, 0.15);
}
.form-group textarea { resize: vertical; min-height: 120px; }

/* ===================================
   FOOTER
   =================================== */
.site-footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.85);
  padding: var(--space-2xl) 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-xl);
  padding-bottom: var(--space-xl);
}
.footer-brand p {
  color: rgba(255, 255, 255, 0.65);
  margin-top: var(--space-md);
  font-size: var(--font-size-small);
  line-height: 1.7;
}
.footer-col h4 {
  color: var(--color-white);
  font-size: var(--font-size-body);
  margin-bottom: var(--space-md);
}
.footer-col a {
  display: block;
  padding: var(--space-xs) 0;
  color: rgba(255, 255, 255, 0.65);
  font-size: var(--font-size-small);
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--color-accent); }
.social-links {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}
.social-links a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  padding: 0;
}
.social-links a:hover {
  background: var(--color-accent);
  color: var(--color-primary);
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--space-lg) 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--font-size-small);
  color: rgba(255, 255, 255, 0.5);
}
.legal-links { display: flex; gap: var(--space-lg); }
.legal-links a { color: rgba(255, 255, 255, 0.5); padding: 0; }
.legal-links a:hover { color: var(--color-accent); }

/* ===================================
   PAGE HEADER (Subpages)
   =================================== */
.page-header {
  background: var(--color-primary);
  padding: calc(80px + var(--space-2xl)) 0 var(--space-2xl);
  text-align: center;
}
.page-header h1 { color: var(--color-white); margin-bottom: var(--space-sm); }
.page-header p { color: rgba(255, 255, 255, 0.7); font-size: 1.1rem; }

/* ===================================
   RESPONSIVE
   =================================== */
@media (max-width: 968px) {
  .text-image, .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-lg); }
  .hero-image { display: none; }
  .hero-content { max-width: 100%; }
  .ref-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .main-nav { display: none; }
  .main-nav.active {
    display: flex;
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg);
    flex-direction: column;
    padding: var(--space-xl);
    z-index: 999;
  }
  .main-nav.active ul {
    flex-direction: column;
    gap: var(--space-md);
  }
  .main-nav.active a { font-size: 1.2rem; }
  .mobile-toggle { display: flex; }
  .header-inner .btn { display: none; }
  .footer-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .hero-buttons { flex-direction: column; }
}