/* ————— Schrift (lokal gehostet, kein Google-CDN) ————— */
@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 400;
  src: url("fonts/inter-400.woff2") format("woff2");
  font-display: swap;
}

@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 500;
  src: url("fonts/inter-500.woff2") format("woff2");
  font-display: swap;
}

@font-face {
  font-family: "Inter";
  font-style: normal;
  font-weight: 600;
  src: url("fonts/inter-600.woff2") format("woff2");
  font-display: swap;
}

/* ————— Basis ————— */
:root {
  --black: #0a0a0a;
  --gray-900: #171717;
  --gray-600: #555555;
  --gray-400: #999999;
  --gray-200: #e5e5e5;
  --gray-100: #f5f5f5;
  --white: #ffffff;
  --max-width: 1080px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--black);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3 {
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 6vw, 4.25rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); margin-bottom: 2.5rem; }
h3 { font-size: 1.125rem; }

a {
  color: inherit;
  text-decoration: none;
}

.eyebrow {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 1rem;
}

/* ————— Lebendiger Hintergrund + Scroll-Progress ————— */
#bg-particles {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

main,
.site-footer {
  position: relative;
  z-index: 1;
}

.section-alt,
.section-contact,
.site-footer {
  background-clip: padding-box;
}

.site-footer {
  background: var(--white);
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--black);
  transform: scaleX(0);
  transform-origin: left;
  z-index: 100;
  pointer-events: none;
}

/* ————— Header ————— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--white);
  border-bottom: 1px solid var(--gray-200);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.wordmark {
  font-weight: 600;
  letter-spacing: -0.01em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 0.9rem;
}

.site-nav a {
  color: var(--gray-600);
  transition: color 0.15s ease;
}

.site-nav a:hover {
  color: var(--black);
}

.site-nav a:not(.nav-cta) {
  position: relative;
}

.site-nav a:not(.nav-cta)::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 100%;
  height: 1px;
  background: var(--black);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.site-nav a:not(.nav-cta):hover::after {
  transform: scaleX(1);
}

.nav-cta {
  color: var(--white) !important;
  background: var(--black);
  padding: 8px 18px;
  border-radius: 2px;
  transition: opacity 0.15s ease;
}

.nav-cta:hover {
  opacity: 0.8;
}

/* ————— Hero ————— */
.hero {
  padding: 120px 0 110px;
  border-bottom: 1px solid var(--gray-200);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 72px;
  align-items: center;
}

.hero-copy > * {
  animation: fade-up 0.6s ease backwards;
}

.hero-copy .eyebrow { animation-delay: 0.05s; }
.hero-copy h1 { animation-delay: 0.12s; }
.hero-copy .lead { animation-delay: 0.22s; }
.hero-copy .hero-meta { animation-delay: 0.32s; }

.hero-card {
  border: 1px solid var(--gray-200);
  background: var(--white);
  padding: 36px 32px 26px;
  box-shadow: 0 30px 70px -45px rgba(0, 0, 0, 0.3);
  transition: transform 0.15s ease-out, box-shadow 0.3s ease;
  will-change: transform;
  animation: fade-up 0.7s ease 0.25s backwards;
}

.hero-card:hover {
  box-shadow: 0 40px 80px -45px rgba(0, 0, 0, 0.38);
}

.hero-diagram {
  display: block;
  width: 100%;
  height: auto;
  color: var(--black);
}

.hero-card-caption {
  margin-top: 20px;
  font-size: 0.85rem;
  color: var(--gray-400);
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(22px);
  }
}

.hero .lead {
  max-width: 560px;
  margin-top: 1.75rem;
  font-size: 1.125rem;
  color: var(--gray-600);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 3rem;
}

.hero-meta span {
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--gray-600);
  border: 1px solid var(--gray-200);
  padding: 6px 14px;
  border-radius: 2px;
}

.hero-audience {
  margin-top: 1.25rem;
  font-size: 0.85rem;
  color: var(--gray-400);
  animation-delay: 0.4s;
}

/* ————— Sektionen ————— */
.section {
  padding: 110px 0;
}

.section-alt {
  background: var(--gray-100);
  border-top: 1px solid var(--gray-200);
  border-bottom: 1px solid var(--gray-200);
}

.section-intro {
  max-width: 62ch;
  color: var(--gray-600);
  margin: -1.25rem 0 3.5rem;
}

/* ————— Lösungen ————— */
.featured {
  border: 1px solid var(--black);
  padding: 36px 40px;
  margin-bottom: 24px;
}

.featured:last-of-type {
  margin-bottom: 3.5rem;
}

.featured-label {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 0.75rem;
}

.featured h3 {
  font-size: 1.35rem;
  margin-bottom: 0.75rem;
}

.featured p {
  color: var(--gray-600);
  max-width: 72ch;
}

.facts {
  list-style: none;
  margin-top: 1.5rem;
  max-width: 72ch;
  border-top: 1px solid var(--gray-200);
}

.facts li {
  padding: 12px 0;
  border-bottom: 1px solid var(--gray-200);
  color: var(--gray-600);
  font-size: 0.95rem;
}

.facts li:last-child {
  border-bottom: none;
}

.facts strong {
  color: var(--black);
  font-weight: 600;
  margin-right: 6px;
}

.solutions {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: 56px;
}

.solutions li {
  padding: 32px 0;
  border-top: 1px solid var(--gray-200);
}

.solution-visual {
  display: block;
  width: 100%;
  height: auto;
  margin-bottom: 1.5rem;
  padding: 18px 16px;
  border: 1px solid var(--gray-200);
  color: var(--black);
  font-family: inherit;
}

.featured-flow {
  display: block;
  width: 100%;
  max-width: 640px;
  height: auto;
  margin-top: 2rem;
  color: var(--black);
  font-family: inherit;
}

.featured-flow-vertical {
  display: none;
  width: 100%;
  max-width: 210px;
  height: auto;
  margin-top: 2rem;
  color: var(--black);
  font-family: inherit;
}

@media (max-width: 640px) {
  .featured-flow {
    display: none;
  }

  .featured-flow-vertical {
    display: block;
  }
}

.solutions h3 {
  margin-bottom: 0.5rem;
}

.solutions p {
  font-size: 0.95rem;
  color: var(--gray-600);
}

.solutions-note {
  margin-top: 3rem;
  color: var(--gray-600);
}

.solutions-note a {
  color: var(--black);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ————— Leistungen ————— */
.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--gray-200);
  border: 1px solid var(--gray-200);
}

.card {
  background: var(--white);
  padding: 40px 36px;
}

.card-index {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--gray-400);
  margin-bottom: 1.5rem;
}

.card h3 {
  margin-bottom: 0.75rem;
}

.card p {
  font-size: 0.95rem;
  color: var(--gray-600);
}

/* ————— Ablauf ————— */
.steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--gray-200);
  border: 1px solid var(--gray-200);
}

.steps li {
  background: var(--white);
  padding: 40px 36px;
}

.step-index {
  display: block;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--gray-400);
  margin-bottom: 1.5rem;
}

.steps h3 {
  margin-bottom: 0.5rem;
}

.steps p {
  font-size: 0.95rem;
  color: var(--gray-600);
}

.steps-note {
  margin-top: 1.5rem;
  font-size: 0.85rem;
  color: var(--gray-400);
}

/* ————— FAQ ————— */
.faq details {
  border-top: 1px solid var(--gray-200);
}

.faq details:last-child {
  border-bottom: 1px solid var(--gray-200);
}

.faq summary {
  cursor: pointer;
  list-style: none;
  position: relative;
  padding: 20px 44px 20px 0;
  font-weight: 600;
  font-size: 1.05rem;
  transition: color 0.15s ease;
}

.faq summary::-webkit-details-marker {
  display: none;
}

.faq summary::after {
  content: "+";
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--gray-400);
}

.faq details[open] summary::after {
  content: "−";
}

.faq summary:hover {
  color: var(--gray-600);
}

.faq details p {
  padding-bottom: 20px;
  color: var(--gray-600);
  max-width: 62ch;
}

/* ————— Profil ————— */
.split {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 64px;
  align-items: start;
}

.split h2 {
  margin-bottom: 0;
}

.split-body p {
  color: var(--gray-600);
  margin-bottom: 1.25rem;
  max-width: 60ch;
}

.principles {
  list-style: none;
  margin-top: 2.5rem;
  border-top: 1px solid var(--gray-200);
}

.principles li {
  padding: 18px 0;
  border-bottom: 1px solid var(--gray-200);
  color: var(--gray-600);
  font-size: 0.95rem;
}

.principles strong {
  color: var(--black);
  font-weight: 600;
  margin-right: 6px;
}

/* ————— Erfahrung ————— */
.timeline {
  list-style: none;
}

.timeline li {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 40px;
  padding: 36px 0;
  border-top: 1px solid var(--gray-200);
}

.timeline li:last-child {
  border-bottom: 1px solid var(--gray-200);
}

.timeline-period {
  font-size: 0.85rem;
  color: var(--gray-400);
  padding-top: 3px;
}

.timeline-content h3 {
  margin-bottom: 0.5rem;
}

.timeline-content p {
  font-size: 0.95rem;
  color: var(--gray-600);
  max-width: 62ch;
}

/* ————— Kontakt ————— */
.section-contact {
  background: var(--black);
  color: var(--white);
}

.eyebrow-invert {
  color: var(--gray-400);
}

.contact-lead {
  max-width: 52ch;
  color: var(--gray-400);
  margin-bottom: 3rem;
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.btn {
  display: inline-block;
  padding: 14px 32px;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: 2px;
  transition: opacity 0.15s ease, background 0.15s ease;
}

.btn-invert {
  background: var(--white);
  color: var(--black);
}

.btn-invert:hover {
  opacity: 0.85;
}

.btn-ghost {
  border: 1px solid var(--gray-600);
  color: var(--white);
}

.btn-ghost:hover {
  background: var(--gray-900);
}

/* ————— Scroll-Reveal & Hover ————— */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.card {
  transition: background 0.2s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
  background: var(--white);
  transform: translateY(-3px);
  box-shadow: 0 18px 40px -28px rgba(0, 0, 0, 0.35);
}

.steps li {
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.steps li:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 40px -28px rgba(0, 0, 0, 0.35);
}

.btn {
  transition: opacity 0.15s ease, background 0.15s ease, transform 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.solution-visual {
  transition: border-color 0.25s ease;
}

.solutions li:hover .solution-visual {
  border-color: var(--gray-400);
}

.featured {
  transition: box-shadow 0.3s ease;
}

.featured:hover {
  box-shadow: 0 30px 60px -45px rgba(0, 0, 0, 0.3);
}

@media (prefers-reduced-motion: reduce) {
  .hero-copy > *,
  .hero-card {
    animation: none;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .card,
  .steps li,
  .btn,
  .site-nav a:not(.nav-cta)::after {
    transition: none;
  }

  .card:hover,
  .steps li:hover,
  .btn:hover {
    transform: none;
  }
}

/* ————— Footer ————— */
.site-footer {
  padding: 32px 0;
  border-top: 1px solid var(--gray-200);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 24px;
  font-size: 0.85rem;
  color: var(--gray-400);
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  color: var(--gray-600);
  transition: color 0.15s ease;
}

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

/* ————— Rechtsseiten ————— */
.legal {
  max-width: 720px;
}

.legal h2 {
  margin-bottom: 3rem;
}

.legal h3 {
  margin: 2.5rem 0 0.75rem;
}

.legal p {
  color: var(--gray-600);
  margin-bottom: 1rem;
  max-width: 62ch;
}

.legal a {
  color: var(--black);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ————— Responsive ————— */
@media (max-width: 820px) {
  .hero {
    padding: 80px 0 72px;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero-card {
    max-width: 480px;
  }

  .section {
    padding: 80px 0;
  }

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

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

  .featured {
    padding: 28px 24px;
  }

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

  .steps li {
    padding: 28px 24px;
  }

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

  .timeline li {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .site-nav a:not(.nav-cta) {
    display: none;
  }
}