/* Grundlayout */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #111827;
  background-color: #ffffff;
  line-height: 1.6;
}

/* Container */
.container {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background-color: #ffffffcc;
  backdrop-filter: blur(10px);
  border-bottom: 1px solid #e5e7eb;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1.25rem;
}

.logo {
  display: flex;
  flex-direction: column;
}

.logo-main {
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  font-size: 0.9rem;
}

.logo-sub {
  font-size: 0.75rem;
  color: #6b7280;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1rem;
  margin: 0;
  padding: 0;
  font-size: 0.9rem;
}

.nav-links a {
  text-decoration: none;
  color: #374151;
  padding: 0.35rem 0.4rem;
  border-radius: 999px;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.nav-links a:hover {
  background-color: #111827;
  color: #f9fafb;
}

/* Hero */
.hero {
  padding: 3.5rem 0 2.5rem;
  background: radial-gradient(circle at top left, #eff6ff, #ffffff 45%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  gap: 2rem;
  align-items: flex-start;
}

.hero h1 {
  font-size: clamp(2rem, 3vw, 2.6rem);
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1rem;
  color: #374151;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.5rem 0 0.5rem;
}

.hero-note {
  font-size: 0.9rem;
  color: #6b7280;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.2rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.95rem;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease,
    transform 0.05s ease;
}

.btn.primary {
  background-color: #111827;
  color: #f9fafb;
}

.btn.primary:hover {
  background-color: #020617;
  transform: translateY(-1px);
}

.btn.secondary {
  background-color: #f9fafb;
  border-color: #d1d5db;
  color: #111827;
}

.btn.secondary:hover {
  background-color: #e5e7eb;
}

/* Cards & Abschnitte */
.section {
  padding: 3rem 0;
}

.section h2 {
  font-size: 1.6rem;
  margin-bottom: 1.25rem;
}

.section-intro {
  max-width: 650px;
  color: #4b5563;
  margin-bottom: 1.8rem;
}

.bg-light {
  background-color: #f9fafb;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.4rem;
}

.card {
  background-color: #ffffff;
  border-radius: 0.9rem;
  padding: 1.3rem 1.4rem;
  border: 1px solid #e5e7eb;
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.04);
}

.card h3 {
  margin-top: 0;
  margin-bottom: 0.6rem;
  font-size: 1.05rem;
}

.card p {
  margin: 0.3rem 0;
  font-size: 0.96rem;
  color: #4b5563;
}

.card-link {
  margin-top: 0.8rem;
  font-size: 0.9rem;
}

.card-link a {
  color: #1d4ed8;
  text-decoration: none;
}

.card-link a:hover {
  text-decoration: underline;
}

/* Info-Karten & Meta-Listen */
.info-card {
  background-color: #ffffff;
  border-radius: 0.9rem;
  padding: 1.3rem 1.4rem;
  border: 1px solid #e5e7eb;
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.05);
}

.info-card h2,
.info-card h3 {
  margin-top: 0;
  margin-bottom: 0.6rem;
}

.info-card ul {
  margin: 0;
  padding-left: 1.1rem;
}

.meta-list {
  list-style: none;
  padding-left: 0;
}

.meta-list li {
  font-size: 0.9rem;
  color: #4b5563;
  margin-bottom: 0.35rem;
}

/* Zwei-Spalten-Layout */
.two-column {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2.2fr);
  gap: 2rem;
  align-items: flex-start;
}

/* Ablauf / Steps */
.steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.3rem;
}

.step {
  background-color: #ffffff;
  border-radius: 0.9rem;
  padding: 1.3rem 1.4rem 1.2rem;
  border: 1px solid #e5e7eb;
  position: relative;
  padding-top: 1.8rem;
}

.step-number {
  position: absolute;
  top: -0.8rem;
  left: 1.2rem;
  width: 1.8rem;
  height: 1.8rem;
  border-radius: 999px;
  background-color: #111827;
  color: #f9fafb;
  font-size: 0.9rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Projekt-Links */
.link-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.3rem;
}

.link-card {
  display: block;
  background-color: #ffffff;
  border-radius: 0.9rem;
  padding: 1.2rem 1.3rem;
  border: 1px solid #e5e7eb;
  text-decoration: none;
  color: inherit;
  transition: transform 0.1s ease, box-shadow 0.1s ease, border-color 0.1s ease;
}

.link-card h3 {
  margin: 0 0 0.45rem;
  font-size: 1rem;
}

.link-card p {
  margin: 0;
  font-size: 0.9rem;
  color: #4b5563;
}

.link-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 30px rgba(15, 23, 42, 0.08);
  border-color: #111827;
}

/* FAQ */
.faq details {
  border-radius: 0.65rem;
  border: 1px solid #e5e7eb;
  padding: 0.75rem 0.9rem;
  margin-bottom: 0.6rem;
  background-color: #ffffff;
}

.faq summary {
  cursor: pointer;
  list-style: none;
  font-weight: 500;
}

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

.faq summary::after {
  content: "+";
  float: right;
  font-weight: 400;
}

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

.faq p {
  margin-top: 0.5rem;
  font-size: 0.9rem;
  color: #4b5563;
}

/* Kontakt */
.contact-list {
  list-style: none;
  margin: 1rem 0;
  padding-left: 0;
  font-size: 0.95rem;
}

.contact-list li {
  margin-bottom: 0.2rem;
}

.contact-form {
  background-color: #ffffff;
  border-radius: 0.9rem;
  padding: 1.3rem 1.4rem;
  border: 1px solid #e5e7eb;
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.05);
}

.contact-form label {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 0.6rem;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.55rem 0.6rem;
  margin-top: 0.25rem;
  border-radius: 0.5rem;
  border: 1px solid #d1d5db;
  font: inherit;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: #111827;
}

.small {
  font-size: 0.8rem;
  color: #6b7280;
}

/* Rechtliches */
.legal-section h3 {
  margin-top: 1.6rem;
  font-size: 1.1rem;
}

/* Footer */
.site-footer {
  border-top: 1px solid #e5e7eb;
  padding: 1.3rem 0 1.4rem;
  background-color: #f9fafb;
  font-size: 0.85rem;
  color: #4b5563;
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.footer-links a {
  color: #4b5563;
  text-decoration: none;
}

.footer-links a:hover {
  text-decoration: underline;
}

.footer-note {
  font-size: 0.8rem;
}

/* Responsive */
@media (max-width: 900px) {
  .hero-grid,
  .two-column {
    grid-template-columns: 1fr;
  }

  .nav-links {
    display: none; /* für den Anfang: einfache Lösung ohne Mobilmenü */
  }

  .site-header {
    position: static;
  }

  .hero {
    padding-top: 2.5rem;
  }
}

@media (max-width: 600px) {
  .nav-container {
    padding-inline: 1rem;
  }

  .section {
    padding: 2.3rem 0;
  }

  .hero h1 {
    font-size: 1.8rem;
  }
}