/* --- SDN4All: ausgelagertes Stylesheet (keine externen Requests) --- */
:root {
  --primary: #0056b3;
  --secondary: #00a8e8;
  --dark: #1a1a1a;
  --light: #f4f7f6;
  --white: #ffffff;
  --text-gray: #4a4a4a;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  color: var(--dark);
  background-color: var(--white);
}

/* Navigation */
header {
  background: var(--white);
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
}
nav {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
}
.logo { font-size: 1.5rem; font-weight: bold; color: var(--primary); text-decoration: none; }
.nav-links { display: flex; align-items: center; }
.nav-links > a,
.nav-links .nav-dropdown > a {
  margin-left: 2rem;
  text-decoration: none;
  color: var(--dark);
  font-weight: 500;
  transition: color 0.3s;
}
.nav-links > a:hover,
.nav-links .nav-dropdown > a:hover { color: var(--secondary); }

/* Artikel-Dropdown */
.nav-dropdown { position: relative; margin-left: 2rem; }
.nav-dropdown > a { margin-left: 0 !important; }
.nav-dropdown-menu {
  display: none !important;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 320px;
  padding: .4rem 0;
  background: var(--white);
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  box-shadow: 0 12px 28px rgba(0,0,0,0.15);
  z-index: 2000;
}
.nav-dropdown:hover > .nav-dropdown-menu,
.nav-dropdown:focus-within > .nav-dropdown-menu { display: block !important; }
.nav-dropdown-menu a {
  display: block;
  margin: 0 !important;
  padding: .55rem 1rem;
  color: var(--dark);
  text-decoration: none;
  font-size: .95rem;
  line-height: 1.35;
  white-space: normal;
}
.nav-dropdown-menu a:hover { background: #eef7ff; color: var(--primary); }

/* Hero */
.hero { background: linear-gradient(135deg, var(--primary), var(--secondary)); color: var(--white); padding: 8rem 2rem 5rem; text-align: center; }
.hero h1 { font-size: 3rem; margin-bottom: 1rem; }
.hero p { font-size: 1.25rem; max-width: 800px; margin: 0 auto 2rem; opacity: 0.9; }
.cta-button { display: inline-block; background: var(--white); color: var(--primary); padding: 1rem 2rem; border-radius: 5px; text-decoration: none; font-weight: bold; transition: transform 0.2s; }
.cta-button:hover { transform: translateY(-2px); }

/* Content */
section { padding: 5rem 2rem; max-width: 1200px; margin: 0 auto; }
h2 { font-size: 2.5rem; color: var(--primary); margin-bottom: 2rem; text-align: center; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 2rem; }
.card { background: var(--light); padding: 2rem; border-radius: 8px; box-shadow: 0 4px 6px rgba(0,0,0,0.05); transition: transform 0.3s; }
.card:hover { transform: translateY(-5px); }
.card h3 { color: var(--primary); margin-bottom: 1rem; }
.tech-highlight { background-color: #eef7ff; border-left: 5px solid var(--secondary); padding: 2rem; margin: 2rem 0; }
.service-list { list-style: none; }
.service-list li { padding: 1rem 0; border-bottom: 1px solid #ddd; }
.service-list li:before { content: "\2713"; color: var(--secondary); font-weight: bold; margin-right: 10px; }

/* Footer & Legal */
footer { background: var(--dark); color: var(--white); padding: 3rem 2rem; text-align: center; }
.footer-links { margin-bottom: 2rem; }
.footer-links a { color: var(--white); margin: 0 1rem; text-decoration: none; font-size: 0.9rem; }
.legal-section { background: var(--light); margin-top: 4rem; border-top: 1px solid #ddd; }
.legal-section h3 { margin-bottom: 1rem; color: var(--primary); }
.legal-section p { margin-bottom: 1rem; }

/* Feste Kopfzeile: Inhalt der Unterseiten darunter beginnen lassen */
.page-main { padding-top: 5.5rem; }

/* Artikel-Lesetypografie */
.fachartikel { max-width: 760px; margin: 0 auto; padding: 2.5rem 1.5rem 3.5rem; color: #2b3444; font-size: 1.04rem; line-height: 1.75; }
.fachartikel .kicker { display: inline-block; margin: 0 0 1.1rem; padding: .3rem .75rem; background: #eef7ff; border-radius: 999px; font-size: .72rem; font-weight: 700; letter-spacing: .09em; text-transform: uppercase; color: var(--primary); }
.fachartikel h1 { margin: 0 0 1.1rem; font-size: clamp(1.6rem, 3.4vw, 2.2rem); line-height: 1.22; color: var(--primary); text-align: left; }
.fachartikel .lead { margin: 0 0 1.25rem; font-size: 1.15rem; line-height: 1.6; color: #3f4a5a; }
.fachartikel .meta { margin: 0 0 2.5rem; padding-bottom: 1.5rem; border-bottom: 1px solid #e6eaf0; font-size: .88rem; color: #6b7280; }
.fachartikel h2 { margin: 2.75rem 0 .9rem; font-size: 1.5rem; line-height: 1.3; color: var(--primary); text-align: left; }
.fachartikel h3 { margin: 1.6rem 0 .4rem; font-size: 1.1rem; color: #1a2536; }
.fachartikel p { margin: 0 0 1.15rem; }
.fachartikel ul, .fachartikel ol { margin: 0 0 1.15rem; padding-left: 1.4rem; }
.fachartikel li { margin: 0 0 .5rem; }
.fachartikel a { color: var(--primary); }
.fachartikel strong { color: #0f1b2d; }
.fachartikel .autor-box { margin-top: 3rem; padding: 1.5rem 1.75rem; background: var(--light); border-radius: 12px; }
.fachartikel .autor-box h2 { margin: 0 0 .5rem; font-size: 1.1rem; text-align: left; }
.fachartikel .autor-box p { margin: 0; font-size: .97rem; color: #475569; }
.fachartikel .weiterlesen { margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid #e6eaf0; }
.fachartikel .weiterlesen h2 { margin: 0 0 .75rem; font-size: 1.1rem; text-align: left; }
.fachartikel .weiterlesen ul { margin: 0; padding: 0; list-style: none; }
.fachartikel .weiterlesen li { margin: 0 0 .6rem; }

/* Artikel-Übersicht */
.artikel-liste { display: grid; gap: 1.25rem; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); margin-top: 2rem; }
.artikel-card { background: var(--light); border: 1px solid #e2e8f0; border-radius: 10px; padding: 1.25rem 1.4rem; transition: box-shadow .15s ease, transform .15s ease; }
.artikel-card:hover { box-shadow: 0 10px 24px rgba(0,0,0,0.1); transform: translateY(-2px); }
.artikel-card h3 { margin: 0 0 .5rem; font-size: 1.1rem; line-height: 1.3; }
.artikel-card h3 a { color: var(--primary); text-decoration: none; }
.artikel-card h3 a:hover { text-decoration: underline; }
.artikel-card p { margin: 0; color: #475569; font-size: .95rem; line-height: 1.5; }

/* Mobil */
@media (max-width: 768px) {
  .hero h1 { font-size: 2rem; }
  nav { flex-direction: column; }
  .nav-links { margin-top: 1rem; flex-wrap: wrap; justify-content: center; }
  .nav-links > a, .nav-dropdown { margin: 0 10px; }
  .nav-dropdown-menu { position: static; display: block !important; box-shadow: none; border: none; min-width: 0; padding-left: 1rem; }
}

/* Artikel: globale section-Layoutregeln im Artikel neutralisieren,
   damit die 760px-Lesespalte nicht von der 1200px-Seitenregel überschrieben wird */
.fachartikel section {
  max-width: none;
  margin: 0;
  padding: 0;
}

/* Artikel: globale header-Regel (fixierte Nav-Leiste) im Artikel neutralisieren,
   damit der Artikel-Kopf normal in der Lesespalte fließt */
.fachartikel header {
  position: static;
  width: auto;
  background: none;
  box-shadow: none;
  padding: 0;
  z-index: auto;
}
.fachartikel .autor-box { text-align: left; }