/* ==========================================================================
   Bremer Gesellschaft – Entwurf
   Farben (sparsam eingesetzt):
     --navy  #053256  Primärfarbe (Kopf, Fuß, Überschriften)
     --blue  #7c9cdc  Akzent (Links, feine Linien)
     --red   #c4362a  Signalfarbe (Call-to-Action)
   ========================================================================== */

:root {
  --navy: #053256;
  --blue: #7c9cdc;
  --red:  #c4362a;

  --ink:  #1c2530;
  --muted: #5a6570;
  --paper: #fbfbf9;
  --line: #e4e6e2;

  --maxw: 68rem;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 18px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--paper);
}

/* ---------- Kopfzeile / Navigation ---------------------------------------- */

.site-header {
  border-bottom: 1px solid var(--line);
  background: #fff;
  position: sticky;
  top: 0;
  z-index: 10;
}

.nav {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 2rem;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--navy);
  margin-right: auto;
}

.brand .key { font-size: 1.5rem; line-height: 1; }

.brand strong {
  font-family: var(--sans);
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}

.brand span {
  font-size: 0.8rem;
  color: var(--muted);
}

.nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem;
  margin: 0;
  padding: 0;
}

.nav a {
  text-decoration: none;
  color: var(--ink);
  font-size: 0.95rem;
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
}

.nav a:hover { color: var(--navy); border-bottom-color: var(--blue); }
.nav a.active { color: var(--navy); border-bottom-color: var(--navy); }

/* ---------- Mobilnavigation (reiner CSS-Umschalter) ----------------------- */

/* Checkbox als Zustandsspeicher – visuell versteckt */
.nav-toggle {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  pointer-events: none;
}

/* Hamburger-Schaltfläche – nur mobil sichtbar */
.nav-burger {
  display: none;
  width: 2.6rem;
  height: 2.6rem;
  border: 1px solid var(--line);
  border-radius: 4px;
  cursor: pointer;
  padding: 0;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}
.nav-burger span {
  display: block;
  width: 1.3rem;
  height: 2px;
  background: var(--navy);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* Sichtbarer Fokusrahmen bei Tastaturbedienung */
.nav-toggle:focus-visible + .nav-burger {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

/* ---------- Allgemeines Layout -------------------------------------------- */

main { display: block; }

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section { padding: 3.5rem 0; }

.prose { max-width: 46rem; }

.prose p { margin: 0 0 1.2rem; }

h1, h2, h3 {
  font-family: var(--sans);
  color: var(--navy);
  line-height: 1.25;
  font-weight: 600;
}

h1 { font-size: 2.4rem; margin: 0 0 1rem; }
h2 { font-size: 1.7rem; margin: 0 0 1rem; }
h3 { font-size: 1.15rem; margin: 0 0 0.4rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--muted); }

a { color: var(--navy); }
a:hover { color: var(--red); }

.lead {
  font-size: 1.25rem;
  color: var(--ink);
}

.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue);
  font-weight: 600;
  margin-bottom: 0.6rem;
}

.rule {
  width: 3rem;
  height: 3px;
  background: var(--red);
  border: 0;
  margin: 0 0 1.6rem;
}

/* ---------- Hero ---------------------------------------------------------- */

.hero {
  position: relative;
  color: #fff;
  background: var(--navy);
}

.hero__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
}

.hero__inner {
  position: relative;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 6rem 1.5rem;
}

.hero h1 { color: #fff; max-width: 20ch; font-size: 2.9rem; }
.hero p { max-width: 40rem; font-size: 1.3rem; color: #eef2f8; }

/* Kompakter Seitenkopf für Unterseiten */
.pagehead {
  background: var(--navy);
  color: #fff;
  padding: 3rem 0 2.6rem;
}
.pagehead h1 { color: #fff; margin-bottom: 0.3rem; }
.pagehead .eyebrow { color: var(--blue); }

/* ---------- Buttons ------------------------------------------------------- */

.btn {
  display: inline-block;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  padding: 0.75rem 1.5rem;
  border-radius: 3px;
  background: var(--red);
  color: #fff;
  border: 2px solid var(--red);
}
.btn:hover { background: #a82c22; border-color: #a82c22; color: #fff; }

.btn--ghost {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.6);
}
.btn--ghost:hover { background: #fff; color: var(--navy); border-color: #fff; }

.btn-row { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 1.8rem; }

/* ---------- Karten / Raster ----------------------------------------------- */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1.5rem;
}

.card {
  border: 1px solid var(--line);
  border-top: 3px solid var(--blue);
  border-radius: 4px;
  padding: 1.5rem;
  background: #fff;
}
.card h3 { color: var(--navy); text-transform: none; letter-spacing: 0; font-size: 1.1rem; }
.card p { margin: 0; color: var(--muted); font-size: 0.98rem; }

a.card { text-decoration: none; }

/* Bild + Text nebeneinander */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  align-items: center;
}
.split img {
  width: 100%;
  height: 100%;
  max-height: 24rem;
  object-fit: cover;
  border-radius: 4px;
}
.split--alt { background: #fff; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

/* ---------- Info-Box ------------------------------------------------------ */

.callout {
  background: #fff;
  border-left: 4px solid var(--red);
  padding: 1.4rem 1.6rem;
  border-radius: 0 4px 4px 0;
  box-shadow: 0 1px 2px rgba(5,50,86,0.06);
}
.callout p:last-child { margin-bottom: 0; }

/* ---------- Fuß ----------------------------------------------------------- */

.site-footer {
  background: var(--navy);
  color: #cdd7e4;
  padding: 2.5rem 0;
  margin-top: 2rem;
  font-size: 0.95rem;
}
.site-footer a { color: #fff; }
.site-footer a:hover { color: var(--blue); }
.footer-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
}
.site-footer .key { color: var(--blue); }

/* ---------- Responsiv ----------------------------------------------------- */

@media (max-width: 760px) {
  body { font-size: 17px; }
  .split { grid-template-columns: 1fr; }
  .hero__inner { padding: 4rem 1.5rem; }
  .hero h1 { font-size: 2.2rem; }
  .nav { padding: 0.8rem 1.5rem; }

  /* Hamburger einblenden */
  .nav-burger { display: flex; }

  /* Menü standardmäßig einklappen und unter die Kopfzeile legen */
  .nav-menu {
    flex-basis: 100%;
    flex-direction: column;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease;
  }
  .nav-menu li { border-top: 1px solid var(--line); }
  .nav-menu a {
    display: block;
    padding: 0.9rem 0.2rem;
    border-bottom: none;
  }
  .nav-menu a.active { border-bottom: none; color: var(--navy); font-weight: 600; }

  /* Geöffneter Zustand */
  .nav-toggle:checked ~ .nav-menu { max-height: 90%; }

  /* Icon zu einem X umformen */
  .nav-toggle:checked + .nav-burger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle:checked + .nav-burger span:nth-child(2) { opacity: 0; }
  .nav-toggle:checked + .nav-burger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}