/* ════════════════════════════════════
   FB Erdbau — Stylesheet
   Polished for HiDPI & all screen sizes
   ════════════════════════════════════ */

:root {
  --c-primary: #004b50;
  --c-primary-dark: #003337;
  --c-primary-light: #006b73;
  --c-bg: #ffffff;
  --c-bg-muted: #f5f5f3;
  --c-text: #1a1a1a;
  --c-text-mid: #4a4a4a;
  --c-text-muted: #7a7a7a;
  --c-border: #e5e5e3;
  --f-body: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --max-w: 1140px;
  --nav-h: 64px;
  --radius: 6px;
}

/* ─── Reset ─── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 16px); }
body {
  font-family: var(--f-body);
  font-weight: 400;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--c-text);
  background: var(--c-bg);
  overflow-x: hidden;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img {
  display: block;
  max-width: 100%;
  height: auto;
  image-rendering: auto;
}
a { color: inherit; }
::selection { background: var(--c-primary); color: #fff; }
:focus-visible { outline: 2px solid var(--c-primary); outline-offset: 3px; border-radius: 2px; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}

/* ─── Container ─── */
.container { width: 100%; max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }

/* ─── Buttons ─── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  font-family: var(--f-body);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  border-radius: var(--radius);
  text-decoration: none;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}
.btn:active { transform: translateY(1px); }
.btn svg {
  width: 16px; height: 16px; flex-shrink: 0;
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}
.btn:hover svg { transform: translateX(3px); }
.btn-primary { background: var(--c-primary); color: #fff; border-color: var(--c-primary); }
.btn-primary:hover { background: var(--c-primary-light); border-color: var(--c-primary-light); box-shadow: 0 4px 16px rgba(0,75,80,0.25); }
.btn-outline { background: transparent; color: #fff; border-color: rgba(255,255,255,0.35); }
.btn-outline:hover { background: rgba(255,255,255,0.08); border-color: #fff; }
.btn-outline:hover svg { transform: none; }
.btn-outline-dark { background: transparent; color: var(--c-primary); border-color: var(--c-primary); }
.btn-outline-dark:hover { background: var(--c-primary); color: #fff; }
.btn-white { background: #fff; color: var(--c-primary); border-color: #fff; }
.btn-white:hover { background: rgba(255,255,255,0.92); box-shadow: 0 4px 16px rgba(0,0,0,0.15); }

/* ─── Nav ─── */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100; height: var(--nav-h);
  display: flex; align-items: center;
  background: transparent;
  transition: background 0.35s ease, box-shadow 0.35s ease;
}
.nav.is-scrolled {
  background: rgba(0,75,80,0.97);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 1px 12px rgba(0,0,0,0.12);
}
.nav--solid { background: var(--c-primary); box-shadow: 0 1px 12px rgba(0,0,0,0.12); }
.nav .container { display: flex; align-items: center; justify-content: space-between; }
.nav-logo { height: 36px; transition: opacity 0.2s ease; }
.nav-logo:hover { opacity: 0.85; }
.nav-links { list-style: none; display: flex; gap: 32px; }
.nav-links a {
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 4px 0;
  position: relative;
  transition: color 0.25s ease;
}
.nav-links a::after {
  content: '';
  position: absolute; bottom: -2px; left: 0;
  width: 0; height: 2px;
  background: #fff;
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.nav-links a:hover,
.nav-links a.is-active { color: #fff; }
.nav-links a:hover::after,
.nav-links a.is-active::after { width: 100%; }

/* Hamburger */
.nav-toggle {
  display: none;
  background: none; border: none;
  cursor: pointer; padding: 10px;
  -webkit-tap-highlight-color: transparent;
}
.nav-toggle span {
  display: block; width: 22px; height: 2px;
  background: #fff; margin: 5px 0;
  border-radius: 1px;
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.2s ease;
}
.nav-toggle.is-active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-active span:nth-child(2) { opacity: 0; }
.nav-toggle.is-active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile Nav */
.nav-mobile {
  position: fixed; inset: 0; top: var(--nav-h);
  background: var(--c-primary-dark);
  z-index: 99;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 28px;
  opacity: 0; visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s;
}
.nav-mobile.is-open { opacity: 1; visibility: visible; }
.nav-mobile a {
  color: rgba(255,255,255,0.85); text-decoration: none;
  font-family: var(--f-body); font-weight: 700; font-size: 1.25rem;
  letter-spacing: 0.04em;
  padding: 8px 16px;
  transition: color 0.2s ease;
}
.nav-mobile a:hover { color: #fff; }

/* ─── Hero ─── */
.hero {
  position: relative;
  min-height: 100vh; min-height: 100svh;
  display: flex; align-items: flex-end;
  overflow: hidden;
}
.hero--sub { min-height: 50vh; min-height: 50svh; }
.hero-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
}
.hero-bg::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(180deg,
    rgba(0,51,55,0.2) 0%,
    rgba(0,51,55,0.08) 35%,
    rgba(0,51,55,0.5) 65%,
    rgba(0,51,55,0.88) 100%
  );
}
.hero-content { position: relative; z-index: 2; padding-bottom: 96px; }
.hero-label {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 0.8125rem; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: #fff; margin-bottom: 20px;
}
.hero-label::before { content: ''; width: 28px; height: 2px; background: #fff; }
.hero h1 {
  font-family: var(--f-body);
  font-weight: 700;
  font-size: clamp(2.5rem, 5vw, 4.25rem);
  color: #fff; line-height: 1.08;
  margin-bottom: 24px; max-width: 640px;
  letter-spacing: -0.01em;
}
.hero-text {
  font-size: 1.0625rem;
  color: rgba(255,255,255,0.8);
  line-height: 1.75; max-width: 500px;
  margin-bottom: 36px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }

/* Hero fade-in */
.hero-content > * {
  opacity: 0; transform: translateY(16px);
  animation: heroFade 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}
.hero-content > :nth-child(1) { animation-delay: 0.1s; }
.hero-content > :nth-child(2) { animation-delay: 0.2s; }
.hero-content > :nth-child(3) { animation-delay: 0.3s; }
.hero-content > :nth-child(4) { animation-delay: 0.4s; }
@keyframes heroFade { to { opacity: 1; transform: translateY(0); } }

/* ─── Stats ─── */
.stats { background: var(--c-primary); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat {
  padding: 44px 24px; text-align: center;
  border-right: 1px solid rgba(255,255,255,0.1);
  transition: background 0.25s ease;
}
.stat:last-child { border-right: none; }
.stat:hover { background: rgba(255,255,255,0.04); }
.stat-value {
  font-family: var(--f-body);
  font-weight: 700;
  font-size: clamp(2rem, 3vw, 2.75rem); color: #fff;
  line-height: 1; margin-bottom: 6px;
  letter-spacing: -0.02em;
}
.stat-label {
  font-size: 0.75rem; color: rgba(255,255,255,0.55);
  letter-spacing: 0.1em; text-transform: uppercase; font-weight: 600;
}

/* ─── Sections ─── */
.s-padding { padding: 104px 0; }
.s-alt { background: var(--c-bg-muted); }
.s-label {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 0.75rem; font-weight: 600;
  letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--c-primary-light); margin-bottom: 16px;
}
.s-label::before { content: ''; width: 28px; height: 2px; background: var(--c-primary); }
.s-title {
  font-family: var(--f-body);
  font-weight: 700;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  line-height: 1.2; margin-bottom: 20px;
  letter-spacing: -0.01em;
}
.s-text {
  font-size: 1.0625rem; line-height: 1.75;
  color: var(--c-text-mid); max-width: 540px;
}

/* ─── Scroll Reveal ─── */
.reveal {
  opacity: 0; transform: translateY(16px);
  transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1), transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ─── About ─── */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.about-img { position: relative; border-radius: var(--radius); overflow: hidden; }
.about-img img {
  width: 100%; aspect-ratio: 4/3; object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}
.about-img:hover img { transform: scale(1.03); }
.about-badge {
  position: absolute; bottom: 0; right: 0;
  background: var(--c-primary); color: #fff;
  padding: 16px 24px;
  border-radius: var(--radius) 0 0 0;
}
.about-badge-label {
  font-size: 0.625rem; font-weight: 600;
  letter-spacing: 0.15em; text-transform: uppercase;
  color: rgba(255,255,255,0.6); margin-bottom: 2px;
}
.about-badge-value { font-family: var(--f-body); font-weight: 700; font-size: 1.25rem; }
.about-features { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 36px; }
.about-feature {
  display: flex; align-items: center; gap: 12px;
  font-size: 0.875rem; font-weight: 600; color: var(--c-text-mid);
  padding: 4px 0;
  transition: color 0.2s ease;
}
.about-feature:hover { color: var(--c-text); }
.about-feature-icon {
  width: 38px; height: 38px;
  background: var(--c-bg-muted);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: background 0.2s ease;
}
.about-feature:hover .about-feature-icon { background: var(--c-primary); }
.about-feature-icon svg {
  width: 16px; height: 16px; color: var(--c-primary);
  transition: color 0.2s ease;
}
.about-feature:hover .about-feature-icon svg { color: #fff; }

/* ─── Services ─── */
.services-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.services-img { border-radius: var(--radius); overflow: hidden; }
.services-img img {
  width: 100%; aspect-ratio: 4/5; object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}
.services-img:hover img { transform: scale(1.03); }
.services-list { margin-top: 32px; }
.service-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--c-border);
  display: flex; align-items: center; gap: 14px;
  font-size: 0.9375rem; font-weight: 500; color: var(--c-text);
  transition: padding-left 0.25s cubic-bezier(0.4, 0, 0.2, 1), color 0.2s ease;
}
.service-item:first-child { border-top: 1px solid var(--c-border); }
.service-item:hover { padding-left: 8px; color: var(--c-primary); }
.service-item svg {
  width: 16px; height: 16px; color: var(--c-primary); flex-shrink: 0;
  transition: transform 0.25s ease;
}
.service-item:hover svg { transform: scale(1.1); }
.services-cta { margin-top: 32px; }

/* ─── Contact ─── */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.contact-img { border-radius: var(--radius); overflow: hidden; }
.contact-img img {
  width: 100%; aspect-ratio: 4/3; object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}
.contact-img:hover img { transform: scale(1.03); }
.contact-list { margin-top: 32px; display: flex; flex-direction: column; gap: 24px; }
.contact-row {
  display: flex; align-items: flex-start; gap: 16px;
  padding: 4px 0;
}
.contact-icon {
  width: 42px; height: 42px;
  background: var(--c-bg-muted);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: background 0.25s ease;
}
.contact-row:hover .contact-icon { background: var(--c-primary); }
.contact-icon svg {
  width: 18px; height: 18px; color: var(--c-primary);
  transition: color 0.25s ease;
}
.contact-row:hover .contact-icon svg { color: #fff; }
.contact-label {
  font-size: 0.6875rem; font-weight: 600;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--c-text-muted); margin-bottom: 3px;
}
.contact-value { font-size: 1rem; font-weight: 500; }
.contact-value a {
  color: var(--c-text); text-decoration: none;
  transition: color 0.2s;
}
.contact-value a:hover { color: var(--c-primary); }
.contact-cta { margin-top: 36px; }

/* ─── Footer ─── */
.footer { background: var(--c-primary-dark); padding: 72px 0 32px; color: rgba(255,255,255,0.5); }
.footer-grid {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px; padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-logo { height: 32px; margin-bottom: 16px; }
.footer-desc { font-size: 0.875rem; line-height: 1.75; max-width: 300px; }
.footer-heading {
  font-size: 0.6875rem; font-weight: 600;
  letter-spacing: 0.12em; text-transform: uppercase;
  color: rgba(255,255,255,0.8); margin-bottom: 20px;
}
.footer-links { list-style: none; display: flex; flex-direction: column; gap: 12px; }
.footer-links a {
  font-size: 0.875rem; text-decoration: none;
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.footer-links a:hover { color: #fff; padding-left: 4px; }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 28px; font-size: 0.75rem;
  color: rgba(255,255,255,0.35);
}

/* ─── Karriere (Seite) ─── */
.karriere-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: start; }
.karriere-intro p { font-size: 1.0625rem; line-height: 1.75; color: var(--c-text-mid); margin-bottom: 16px; }
.karriere-benefits { margin-top: 40px; }
.benefit-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--c-border);
  display: flex; align-items: center; gap: 16px;
  transition: padding-left 0.25s ease;
}
.benefit-item:first-child { border-top: 1px solid var(--c-border); }
.benefit-item:hover { padding-left: 4px; }
.benefit-icon {
  width: 46px; height: 46px;
  background: var(--c-bg-muted);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: background 0.25s ease;
}
.benefit-item:hover .benefit-icon { background: var(--c-primary); }
.benefit-icon svg {
  width: 20px; height: 20px; color: var(--c-primary);
  transition: color 0.25s ease;
}
.benefit-item:hover .benefit-icon svg { color: #fff; }
.benefit-title { font-family: var(--f-body); font-weight: 700; font-size: 1.0625rem; margin-bottom: 2px; }
.benefit-desc { font-size: 0.8125rem; color: var(--c-text-muted); line-height: 1.5; }
.karriere-cta {
  background: var(--c-primary);
  padding: 48px; border-radius: var(--radius);
  position: sticky; top: calc(var(--nav-h) + 24px);
}
.karriere-cta h3 {
  font-family: var(--f-body);
  font-weight: 700;
  font-size: 1.5rem; color: #fff; margin-bottom: 12px;
}
.karriere-cta p {
  font-size: 0.9375rem; color: rgba(255,255,255,0.7);
  line-height: 1.75; margin-bottom: 28px;
}
.karriere-cta-email {
  margin-top: 20px; display: flex; align-items: center; gap: 8px;
  font-size: 0.8125rem; color: rgba(255,255,255,0.5);
}
.karriere-cta-email svg { width: 14px; height: 14px; }
.karriere-cta-email a { color: rgba(255,255,255,0.8); text-decoration: none; transition: color 0.2s; }
.karriere-cta-email a:hover { color: #fff; text-decoration: underline; }

/* ─── Responsive: Large Desktop (1440p+) ─── */
@media (min-width: 1440px) {
  :root { --max-w: 1240px; }
  .hero h1 { font-size: 4.5rem; }
  .hero-text { font-size: 1.125rem; }
  .s-padding { padding: 120px 0; }
  .stat { padding: 52px 32px; }
  .stat-value { font-size: 3rem; }
}

/* ─── Responsive: Tablet Landscape ─── */
@media (max-width: 1024px) {
  .nav-links { gap: 20px; }
  .nav-links a { font-size: 0.75rem; }
  .about-grid,
  .services-grid,
  .contact-grid,
  .karriere-grid { gap: 48px; }
  .footer-grid { gap: 32px; }
}

/* ─── Responsive: Tablet ─── */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .container { padding: 0 20px; }
  .s-padding { padding: 72px 0; }
  .hero-content { padding-bottom: 64px; }
  .hero--sub { min-height: 40vh; min-height: 40svh; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { justify-content: center; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat { padding: 28px 16px; }
  .stat:nth-child(2) { border-right: none; }
  .about-grid,
  .services-grid,
  .contact-grid,
  .karriere-grid { grid-template-columns: 1fr; gap: 40px; }
  .about-features { grid-template-columns: 1fr; }
  .about-img img,
  .services-img img,
  .contact-img img { aspect-ratio: 16/10; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .karriere-cta { padding: 32px 24px; position: static; }
}

/* ─── Responsive: Small ─── */
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .stats-grid { grid-template-columns: 1fr; }
  .stat { border-right: none; border-bottom: 1px solid rgba(255,255,255,0.1); }
  .stat:last-child { border-bottom: none; }
  .hero h1 { font-size: 2rem; }
  .hero-label { font-size: 0.6875rem; }
  .hero-content { padding-bottom: 48px; }
  .s-padding { padding: 56px 0; }
  .footer { padding: 48px 0 24px; }
  .footer-grid { grid-template-columns: 1fr; }
  .btn { padding: 13px 24px; width: 100%; justify-content: center; }
  .nav-mobile a { font-size: 1.125rem; }
}