/* ========================================
   LSB Innenausbau — Style System
   ======================================== */

/* --- CSS Custom Properties --- */
:root {
  --color-primary: #0048B3;
  --color-primary-dark: #003585;
  --color-primary-light: #1a6bdf;
  --color-dark: #1a1a2e;
  --color-dark-lighter: #16213e;
  --color-light: #f8f9fa;
  --color-white: #ffffff;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-text-muted: #999999;
  --color-border: #e0e0e0;

  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Inter', sans-serif;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.16);
  --shadow-card: 0 4px 24px rgba(0, 72, 179, 0.1);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

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

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

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

ul {
  list-style: none;
}

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 100px 0;
}

/* --- Animations --- */
.animate-ready .fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.animate-ready .fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.animate-ready .fade-in-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.animate-ready .fade-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.animate-ready .fade-in-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.animate-ready .fade-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }

/* --- Navigation --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 20px 0;
  transition: all var(--transition);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(26, 26, 46, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 12px 0;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo img {
  height: 45px;
  width: auto;
  transition: height var(--transition);
}

.navbar.scrolled .nav-logo img {
  height: 36px;
}

/* Logo background pill for visibility on dark hero */
.nav-logo {
  background: rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-sm);
  padding: 4px 12px;
  display: inline-flex;
  align-items: center;
  transition: background var(--transition);
}

.navbar.scrolled .nav-logo {
  background: rgba(255, 255, 255, 0.95);
}

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  color: var(--color-white);
  font-weight: 500;
  font-size: 0.95rem;
  position: relative;
  padding: 4px 0;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary-light);
  transition: width var(--transition);
}

.nav-links a:hover::after {
  width: 100%;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.hamburger span {
  display: block;
  width: 28px;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: all var(--transition);
}

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

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

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

/* Mobile Nav */
.mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  right: -100%;
  width: 280px;
  height: 100vh;
  background: var(--color-dark);
  padding: 80px 32px 32px;
  transition: right var(--transition);
  z-index: 999;
}

.mobile-nav.open {
  right: 0;
}

.mobile-nav a {
  display: block;
  color: var(--color-white);
  font-size: 1.1rem;
  font-weight: 500;
  padding: 16px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 998;
  opacity: 0;
  transition: opacity var(--transition);
}

.nav-overlay.active {
  opacity: 1;
}

/* --- Hero Section --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-dark);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0.4;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(26, 26, 46, 0.9) 0%,
    rgba(0, 72, 179, 0.6) 50%,
    rgba(26, 26, 46, 0.85) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  padding: 0 24px;
}

.hero-badge {
  display: inline-block;
  background: rgba(0, 72, 179, 0.3);
  border: 1px solid rgba(0, 72, 179, 0.5);
  color: var(--color-white);
  padding: 8px 20px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero h1 {
  color: var(--color-white);
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero h1 span {
  color: var(--color-primary-light);
}

.hero p {
  color: rgba(255, 255, 255, 0.8);
  font-size: clamp(1rem, 2vw, 1.2rem);
  margin-bottom: 40px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--color-primary);
  color: var(--color-white);
  padding: 16px 36px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  transition: all var(--transition);
  box-shadow: 0 4px 20px rgba(0, 72, 179, 0.4);
}

.hero-cta:hover {
  background: var(--color-primary-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 72, 179, 0.5);
}

.hero-cta svg {
  width: 20px;
  height: 20px;
  transition: transform var(--transition);
}

.hero-cta:hover svg {
  transform: translateX(4px);
}

/* Scroll indicator */
.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

.scroll-indicator span {
  display: block;
  width: 24px;
  height: 40px;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-radius: 12px;
  position: relative;
}

.scroll-indicator span::after {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: rgba(255, 255, 255, 0.6);
  border-radius: 2px;
  animation: scrollDown 1.5s ease-in-out infinite;
}

@keyframes scrollDown {
  0% { opacity: 1; transform: translateX(-50%) translateY(0); }
  100% { opacity: 0; transform: translateX(-50%) translateY(12px); }
}

/* --- Section Headings --- */
.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header .label {
  display: inline-block;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  color: var(--color-dark);
  margin-bottom: 16px;
}

.section-header p {
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto;
  font-size: 1.05rem;
}

.section-dark .section-header h2 {
  color: var(--color-white);
}

.section-dark .section-header p {
  color: rgba(255, 255, 255, 0.7);
}

/* --- Leistungen Section --- */
.leistungen {
  background: var(--color-light);
}

.leistungen-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.leistung-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  text-align: center;
  transition: all var(--transition);
  border: 1px solid var(--color-border);
}

.leistung-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-card);
  border-color: var(--color-primary);
}

.leistung-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition);
}

.leistung-card:hover .leistung-icon {
  transform: scale(1.1) rotate(3deg);
}

.leistung-icon svg {
  width: 36px;
  height: 36px;
  color: var(--color-white);
}

.leistung-card h3 {
  font-size: 1.15rem;
  margin-bottom: 12px;
  color: var(--color-dark);
}

.leistung-card p {
  color: var(--color-text-light);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* --- Ueber Uns Section --- */
.ueber-uns {
  background: var(--color-white);
}

.ueber-uns-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.ueber-uns-text h2 {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  color: var(--color-dark);
  margin-bottom: 20px;
}

.ueber-uns-text .label {
  display: inline-block;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 12px;
}

.ueber-uns-text p {
  color: var(--color-text-light);
  margin-bottom: 16px;
  font-size: 1.05rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 36px;
}

.stat-item {
  text-align: center;
  padding: 20px;
  background: var(--color-light);
  border-radius: var(--radius-md);
}

.stat-number {
  font-family: var(--font-heading);
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--color-primary);
  display: block;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--color-text-light);
  margin-top: 4px;
}

.ueber-uns-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
}

.ueber-uns-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ueber-uns-image::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 3px solid var(--color-primary);
  border-radius: var(--radius-lg);
  opacity: 0.3;
}

/* --- Galerie Section --- */
.galerie {
  background: var(--color-dark);
  color: var(--color-white);
}

.galerie-filter {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.filter-btn {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--color-white);
  padding: 10px 24px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font-body);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.galerie-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

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

.galerie-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.galerie-item:hover img {
  transform: scale(1.1);
}

.galerie-item::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.6) 0%, transparent 60%);
  opacity: 0;
  transition: opacity var(--transition);
}

.galerie-item:hover::after {
  opacity: 1;
}

.galerie-item .item-label {
  position: absolute;
  bottom: 12px;
  left: 12px;
  color: var(--color-white);
  font-size: 0.85rem;
  font-weight: 500;
  z-index: 2;
  opacity: 0;
  transform: translateY(10px);
  transition: all var(--transition);
}

.galerie-item:hover .item-label {
  opacity: 1;
  transform: translateY(0);
}

/* Lightbox */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.95);
  align-items: center;
  justify-content: center;
}

.lightbox.active {
  display: flex;
}

.lightbox img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius-sm);
}

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  border-radius: 50%;
  color: var(--color-white);
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}

.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.2);
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  border-radius: 50%;
  color: var(--color-white);
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}

.lightbox-nav:hover {
  background: rgba(255, 255, 255, 0.2);
}

.lightbox-prev { left: 24px; }
.lightbox-next { right: 24px; }

/* --- Warum LSB Section --- */
.warum-lsb {
  background: var(--color-light);
}

.usps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.usp-card {
  text-align: center;
  padding: 40px 24px;
  background: var(--color-white);
  border-radius: var(--radius-md);
  transition: all var(--transition);
  border: 1px solid var(--color-border);
}

.usp-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.usp-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  background: var(--color-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
}

.usp-card:hover .usp-icon {
  background: var(--color-primary);
}

.usp-icon svg {
  width: 28px;
  height: 28px;
  color: var(--color-primary);
  transition: color var(--transition);
}

.usp-card:hover .usp-icon svg {
  color: var(--color-white);
}

.usp-card h3 {
  font-size: 1.05rem;
  color: var(--color-dark);
  margin-bottom: 8px;
}

.usp-card p {
  font-size: 0.88rem;
  color: var(--color-text-light);
  line-height: 1.5;
}

/* --- Kontakt Section --- */
.kontakt {
  background: var(--color-white);
}

.kontakt-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 60px;
  align-items: start;
  max-width: 600px;
  margin: 0 auto;
}

.kontakt-info h3 {
  font-size: 1.3rem;
  color: var(--color-dark);
  margin-bottom: 24px;
}

.kontakt-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
}

.kontakt-item-icon {
  width: 48px;
  height: 48px;
  min-width: 48px;
  background: var(--color-light);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.kontakt-item-icon svg {
  width: 22px;
  height: 22px;
  color: var(--color-primary);
}

.kontakt-item-text strong {
  display: block;
  font-size: 0.9rem;
  color: var(--color-dark);
  margin-bottom: 4px;
}

.kontakt-item-text span,
.kontakt-item-text a {
  font-size: 0.95rem;
  color: var(--color-text-light);
}

.kontakt-item-text a:hover {
  color: var(--color-primary);
}

.whatsapp-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #25D366;
  color: var(--color-white);
  padding: 14px 28px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all var(--transition);
  margin-top: 12px;
}

.whatsapp-btn:hover {
  background: #1fb855;
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.3);
}

.whatsapp-btn svg {
  width: 22px;
  height: 22px;
}

.kontakt-map {
  border-radius: var(--radius-md);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--color-light);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
}

.kontakt-map-placeholder {
  text-align: center;
  color: var(--color-text-muted);
}

.kontakt-map-placeholder svg {
  width: 48px;
  height: 48px;
  margin-bottom: 12px;
  color: var(--color-primary);
  opacity: 0.5;
}

/* --- Footer --- */
.footer {
  background: var(--color-dark);
  color: var(--color-white);
  padding: 60px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand img {
  height: 40px;
  margin-bottom: 16px;
  background: rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-sm);
  padding: 4px 10px;
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
  line-height: 1.6;
  max-width: 300px;
}

.footer h4 {
  font-size: 1rem;
  margin-bottom: 20px;
  color: var(--color-white);
}

.footer-links a {
  display: block;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.9rem;
  padding: 6px 0;
  transition: color var(--transition);
}

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

.footer-bottom {
  padding-top: 24px;
  text-align: center;
  color: rgba(255, 255, 255, 0.4);
  font-size: 0.85rem;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .leistungen-grid,
  .usps-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

@media (max-width: 768px) {
  section {
    padding: 70px 0;
  }

  .nav-links {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .mobile-nav {
    display: block;
  }

  .ueber-uns-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .ueber-uns-image {
    order: -1;
  }

  .kontakt-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

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

  .leistungen-grid,
  .usps-grid {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
  }

  .stat-number {
    font-size: 1.6rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero h1 {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .galerie-grid {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  .galerie-filter {
    gap: 8px;
  }

  .filter-btn {
    padding: 8px 16px;
    font-size: 0.8rem;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

/* --- Impressum / Datenschutz --- */
.legal-page {
  padding-top: 120px;
  padding-bottom: 60px;
  min-height: 60vh;
}

.legal-page h1 {
  font-size: 2rem;
  color: var(--color-dark);
  margin-bottom: 32px;
}

.legal-page h2 {
  font-size: 1.3rem;
  color: var(--color-dark);
  margin-top: 32px;
  margin-bottom: 12px;
}

.legal-page h3 {
  font-size: 1.1rem;
  color: var(--color-dark);
  margin-top: 24px;
  margin-bottom: 8px;
}

.legal-page p {
  color: var(--color-text-light);
  margin-bottom: 12px;
  line-height: 1.7;
}

.legal-page ul {
  list-style: disc;
  padding-left: 24px;
  margin-bottom: 12px;
}

.legal-page li {
  color: var(--color-text-light);
  margin-bottom: 6px;
}

.legal-page a {
  color: var(--color-primary);
}

.legal-page a:hover {
  text-decoration: underline;
}