*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --cobalt: #1a3a7c;
  --cobalt-deep: #0d2154;
  --cobalt-mid: #2a4fa0;
  --cobalt-light: #d6e0f5;
  --cobalt-pale: #eef2fb;
  --warm: #f7f4ef;
  --gold: #b5843a;
  --ink: #0d1a38;
  --muted: rgba(13,26,56,0.65);
  --serif: 'Cormorant Garamond', Georgia, serif;
  --sans: 'Jost', 'Helvetica Neue', sans-serif;
}
html { scroll-behavior: smooth; }
body {
  background: var(--cobalt-pale);
  color: var(--ink);
  font-family: var(--sans);
  font-weight: 300;
  letter-spacing: 0.01em;
  overflow-x: hidden;
}
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.75rem 3rem;
  background: rgba(238,242,251,0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(26,58,124,0.08);
}
.logo-wrap { display: flex; flex-direction: row; align-items: center; gap: 0.75rem; text-decoration: none; }
.logo-main { font-family: var(--serif); font-size: 1rem; font-weight: 300; letter-spacing: 0.18em; text-transform: uppercase; color: var(--cobalt-deep); }
.logo-aer { font-size: 0.48rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--gold); }
.nav-links { display: flex; gap: 2.5rem; list-style: none; }
.nav-links a { color: var(--cobalt); text-decoration: none; font-size: 0.75rem; letter-spacing: 0.12em; text-transform: uppercase; font-weight: 300; opacity: 0.6; transition: opacity 0.3s; }
.nav-links a:hover { opacity: 1; }
.nav-links a.active { opacity: 1; border-bottom: 1px solid var(--gold); padding-bottom: 2px; }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; background: none; border: none; }
.hamburger span { display: block; width: 24px; height: 1.5px; background: var(--cobalt-deep); }
.nav-mobile { display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(238,242,251,0.97); z-index: 99; flex-direction: column; justify-content: center; align-items: center; gap: 2.5rem; }
.nav-mobile.open { display: flex; }
.nav-mobile a { font-family: var(--serif); font-size: 2rem; font-weight: 300; color: var(--cobalt-deep); text-decoration: none; opacity: 0.8; }
.nav-mobile .close-btn { position: absolute; top: 1.75rem; right: 1.5rem; font-size: 1.5rem; color: var(--cobalt-deep); cursor: pointer; background: none; border: none; opacity: 0.5; }

.artikel-wrap {
  max-width: 780px;
  margin: 0 auto;
  padding: 10rem 3rem 8rem;
}
.artikel-meta {
  display: flex;
  gap: 1.5rem;
  align-items: center;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}
.artikel-serie { font-size: 0.62rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--gold); }
.artikel-datum { font-size: 0.62rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }
.artikel-title {
  font-family: var(--serif);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 300;
  line-height: 1.1;
  color: var(--cobalt-deep);
  margin-bottom: 1rem;
}
.artikel-sub {
  font-family: var(--serif);
  font-size: 1.2rem;
  font-style: italic;
  color: var(--muted);
  margin-bottom: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(26,58,124,0.1);
}
.artikel-body h2 {
  font-family: var(--serif);
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--cobalt-deep);
  margin: 2.5rem 0 1rem;
}
.artikel-body p {
  font-size: 0.95rem;
  line-height: 1.95;
  color: var(--muted);
  margin-bottom: 1.25rem;
}
.artikel-body p:last-child { margin-bottom: 0; }
.artikel-quote {
  border-left: 2px solid var(--gold);
  padding: 1rem 0 1rem 2rem;
  margin: 2rem 0;
  font-family: var(--serif);
  font-size: 1.2rem;
  font-style: italic;
  color: var(--cobalt-deep);
  line-height: 1.6;
}
.artikel-italic {
  font-family: var(--serif);
  font-style: italic;
  font-size: 0.95rem;
  color: var(--muted);
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(26,58,124,0.08);
}

.serie-nav {
  margin-top: 5rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
}
.serie-nav-item {
  padding: 2.5rem;
  background: var(--cobalt-deep);
  text-decoration: none;
  transition: background 0.3s;
}
.serie-nav-item:hover { background: var(--cobalt); }
.serie-nav-item.next { text-align: right; }
.serie-nav-label { font-size: 0.62rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--gold); opacity: 0.7; margin-bottom: 0.5rem; }
.serie-nav-title { font-family: var(--serif); font-size: 1rem; font-weight: 300; color: var(--warm); line-height: 1.3; }
.serie-nav-item.disabled { opacity: 0.35; pointer-events: none; }

footer { padding: 2.5rem 3rem; border-top: 1px solid rgba(26,58,124,0.1); display: flex; justify-content: space-between; align-items: center; }
footer p { font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: rgba(13,26,56,0.3); }
.footer-links { display: flex; gap: 2rem; }
footer a { color: rgba(13,26,56,0.35); text-decoration: none; font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; transition: color 0.3s; }
footer a:hover { color: var(--cobalt); }

@media (max-width: 768px) {
  nav { padding: 1.25rem 1.5rem; }
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .artikel-wrap { padding: 7rem 1.5rem 5rem; }
  .serie-nav { grid-template-columns: 1fr; }
  .serie-nav-item.next { text-align: left; }
  footer { flex-direction: column; align-items: flex-start; gap: 1.5rem; padding: 2rem 1.5rem; }
}