/* ============================================================
   layout.css — Header, Navigation, Hero, Sections, Footer
   Mobile First (Basis < 640), min-width-Queries aufwärts
   ============================================================ */

/* ---- Header ---- */
.header {
  position: sticky; top: 0; z-index: 100;
  background: var(--papier);
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-ui) var(--ease-inout);
}
.header.ist-verdichtet { border-bottom-color: var(--nebel); }

.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--s-4);
  height: var(--header-h);
  transition: height 200ms var(--ease-inout);
}
@media (min-width: 960px) {
  .header.ist-verdichtet .header-inner { height: var(--header-h-klein); }
}

.header-logo { flex-shrink: 0; }
.header-logo img {
  width: min(280px, 56vw);
  transition: transform 200ms var(--ease-inout);
  transform-origin: left center;
}
@media (min-width: 960px) {
  .header.ist-verdichtet .header-logo img { transform: scale(0.85); }
}

/* Desktop-Navigation */
.nav-desktop { display: none; }
@media (min-width: 960px) {
  .nav-desktop { display: flex; align-items: center; gap: var(--s-5); }
  /* Linktext Nacht/Grau, Rot nur als Marker (DESIGN.md: Rot ist Handlung) */
  .nav-desktop a {
    text-decoration: none; font-weight: 500; font-size: 1rem;
    color: var(--grau);
    padding-block: var(--s-2);
    border-bottom: 2px solid transparent;
    transition: border-color var(--t-ui) var(--ease-out), color var(--t-ui) var(--ease-out);
  }
  .nav-desktop a:hover { border-bottom-color: var(--rot); color: var(--nacht); }
  .nav-desktop a[aria-current] { border-bottom-color: var(--rot); color: var(--nacht); font-weight: 600; }
  .nav-desktop .nav-untermenue a { color: var(--nacht); }
  .nav-gruppe > a { display: block; } /* gleiche Klickhöhe wie die übrigen Menüpunkte (Flex-Items) */
}

/* Dropdown Leistungen (Desktop, CSS-only, focus-within) */
.nav-gruppe { position: relative; }
.nav-untermenue {
  visibility: hidden; opacity: 0;
  position: absolute; top: 100%; left: 50%; transform: translateX(-50%);
  min-width: 250px;
  background: var(--weiss); border: 1px solid var(--nebel); border-radius: var(--radius-m);
  box-shadow: var(--schatten-overlay);
  padding: var(--s-2);
  transition: opacity var(--t-ui) var(--ease-out);
  z-index: 110;
}
.nav-gruppe:hover .nav-untermenue,
.nav-gruppe:focus-within .nav-untermenue { visibility: visible; opacity: 1; }
.nav-untermenue a {
  display: block; padding: var(--s-3) var(--s-4);
  border-bottom: none !important; border-radius: var(--radius-s);
}
.nav-untermenue a:hover { background: var(--flaeche); }

.header .header-cta { display: none; } /* schlägt .btn{display:inline-flex} aus components.css */
@media (min-width: 1120px) { .header .header-cta { display: inline-flex; } }

/* Burger (Mobil) */
.nav-burger {
  display: inline-flex; flex-direction: column; justify-content: center; gap: 5px;
  width: 44px; height: 44px; align-items: center;
}
.nav-burger span {
  display: block; width: 24px; height: 2.5px;
  background: var(--nacht); border-radius: 2px;
  transition: transform 200ms var(--ease-inout), opacity 200ms var(--ease-inout);
}
.nav-burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav-burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }
@media (min-width: 960px) { .nav-burger { display: none; } }

/* Mobil-Overlay */
.nav-overlay {
  position: fixed; inset: 0; z-index: 90;
  background: var(--nacht); color: var(--licht);
  padding: calc(var(--header-h) + var(--s-6)) var(--gutter) var(--s-7);
  overflow-y: auto;
  visibility: hidden; opacity: 0;
  transition: opacity 200ms var(--ease-inout), visibility 0s 200ms;
}
.nav-overlay.ist-offen { visibility: visible; opacity: 1; transition: opacity 200ms var(--ease-inout); }
body.nav-ist-offen { overflow: hidden; }
body.nav-ist-offen .header { background: var(--nacht); }
body.nav-ist-offen .nav-burger span { background: var(--licht); }
body.nav-ist-offen .header-logo img { filter: brightness(0) invert(1); }

.nav-overlay ul { display: flex; flex-direction: column; gap: var(--s-2); list-style: none; margin: 0; padding: 0; }
.nav-overlay a {
  display: block;
  font-family: var(--font-display); font-weight: 600; font-size: 2rem;
  text-decoration: none; padding: var(--s-3) 0;
  color: var(--licht); /* schlägt a:not([class]) aus base.css */
}
.nav-overlay a:hover, .nav-overlay a[aria-current="page"] { color: var(--blau); }
.nav-overlay .nav-overlay-sub a { font-size: 1.25rem; font-family: var(--font-text); font-weight: 500; padding: var(--s-2) 0 var(--s-2) var(--s-5); color: var(--nebel); }
.nav-overlay .nav-overlay-cta { margin-top: var(--s-6); }

/* ---- Sections ---- */
.section { padding-block: var(--s-8); }
@media (min-width: 960px) { .section { padding-block: var(--s-9); } }
.section-kopf { margin-bottom: var(--s-6); }
.section-kopf .meta { display: block; margin-bottom: var(--s-2); text-transform: uppercase; }

/* ---- Hero (Start) ---- */
.hero {
  position: relative; display: flex; align-items: flex-end;
  min-height: min(86svh, 860px);
  color: var(--weiss);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--diagonale)), 0 100%);
  background: var(--nacht);
}
.hero-medien { position: absolute; inset: 0; overflow: hidden; }
.hero-medien img, .hero-medien video {
  width: 100%; height: 100%; object-fit: cover; object-position: 70% center;
}
.hero-medien::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(75deg, rgb(20 24 29 / 0.78) 0%, rgb(20 24 29 / 0.45) 45%, rgb(20 24 29 / 0.12) 75%);
}
.hero-inhalt { position: relative; z-index: 1; width: 100%; padding-block: var(--s-8) calc(var(--s-8) + var(--diagonale)); }
.hero-inhalt .lead { max-width: 34rem; margin-block: var(--s-4) var(--s-6); color: var(--licht); }
.hero .pulse-line { margin-top: var(--s-4); color: var(--rot); }

/* Unterseiten-Hero */
.hero-klein {
  position: relative; color: var(--weiss); background: var(--nacht);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--diagonale)), 0 100%);
}
.hero-klein .hero-inhalt { padding-block: var(--s-7) calc(var(--s-7) + var(--diagonale)); }
.hero-klein-schlicht { clip-path: none; }
.hero-klein-schlicht .hero-inhalt { padding-bottom: var(--s-7); }

/* ---- Bild-Sektion mit Diagonale ---- */
.bild-band { clip-path: polygon(0 var(--diagonale), 100% 0, 100% calc(100% - var(--diagonale)), 0 100%); }
.bild-band img { width: 100%; height: min(60vh, 560px); object-fit: cover; }

/* Stencil-Eckschnitt: Bildkanten zitieren die Logo-Schnitte */
.split-bild img, .video-rahmen {
  clip-path: polygon(0 0, calc(100% - 40px) 0, 100% 40px, 100% 100%, 0 100%);
  border-radius: 0;
}

/* Scroll-Hinweis im Hero (nur Startseite) */
.scroll-cue {
  display: inline-flex; align-items: center; gap: var(--s-2);
  margin-top: var(--s-6);
  color: var(--licht); font-size: var(--fs-meta); font-weight: 500;
  letter-spacing: 0.08em; text-transform: uppercase;
  animation: cue-puls 2.4s var(--ease-inout) infinite;
}
@keyframes cue-puls { 0%, 100% { opacity: 0.55; } 50% { opacity: 1; } }
@media (prefers-reduced-motion: reduce) { .scroll-cue { animation: none; opacity: 0.8; } }

/* ---- Split-Layout ---- */
.split { display: grid; gap: var(--s-6); align-items: center; }
@media (min-width: 960px) {
  .split { grid-template-columns: 1fr 1fr; gap: var(--s-8); }
  .split > .split-bild { order: 0; }
  .split-rechts > .split-bild { order: 1; }
}
.split-bild img { border-radius: var(--radius-m); width: 100%; object-fit: cover; }
.split-oben { align-items: start; }

/* ---- Grids ---- */
.grid-2, .grid-3, .grid-4 { display: grid; gap: var(--s-5); }
@media (min-width: 640px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* Angebots-Weiche: bewusst asymmetrisch (09 Anti-Generik) */
.weiche { display: grid; gap: var(--s-5); }
@media (min-width: 960px) {
  .weiche { grid-template-columns: 7fr 5fr; align-items: stretch; }
}

/* ---- Footer ---- */
.footer { background: var(--nacht); color: var(--licht); margin-top: var(--s-8); }
.footer .pulse-line { color: var(--blau); transform: translateY(-1px); }
.footer-inner { display: grid; gap: var(--s-6); padding-block: var(--s-7); }
@media (min-width: 960px) { .footer-inner { grid-template-columns: 2fr 1.2fr 1.2fr 1fr; gap: var(--s-7); } }
.footer h2 { font-size: 1.1rem; font-family: var(--font-text); font-weight: 600; margin-bottom: var(--s-3); color: var(--weiss); }
.footer ul { display: grid; gap: 0; list-style: none; margin: 0; padding: 0; }
/* Einheitliches 32-px-Zeilenraster: Links bekommen die volle Zeile als Tippfläche */
.footer li { min-height: 32px; display: flex; align-items: center; }
.footer li > a { display: block; padding-block: 5px; }
.footer a { color: var(--licht); text-decoration: none; }
.footer a:hover { color: var(--blau); text-decoration: underline; text-underline-offset: 3px; }
.footer-logozeile img { width: 220px; filter: brightness(0) invert(1); opacity: 0.95; }
.footer-claim { margin-top: var(--s-3); color: var(--nebel); font-size: var(--fs-meta); }
.footer-disclaimer {
  border-top: 1px solid rgb(255 255 255 / 0.12);
  padding-block: var(--s-4); font-size: var(--fs-meta); color: var(--nebel);
}
.footer-copyright { padding-bottom: var(--s-5); font-size: var(--fs-meta); color: var(--nebel); }