/* Header */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: var(--z-header);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem var(--gutter);
  transition: background var(--dur) var(--ease), backdrop-filter var(--dur) var(--ease), border-color var(--dur) var(--ease);
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled {
  background: var(--glass);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-bottom-color: var(--line-soft);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
}
.brand img {
  height: 40px;
  width: auto;
}
.brand .brand-word {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.14em;
  font-size: 0.95rem;
  color: var(--text);
}
.nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2vw, 2rem);
}
.nav-links {
  display: flex;
  gap: clamp(1rem, 2vw, 2rem);
  list-style: none;
  padding: 0;
}
.nav-links a {
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 500;
}
.nav-links a:hover {
  color: var(--text);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.nav-toggle {
  display: none;
}

/* Hero */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-block: 8rem 4rem;
}
.hero-inner {
  max-width: 34rem;
}
.hero .eyebrow {
  white-space: nowrap;
}
.hero h1 {
  max-width: 14ch;
  margin-top: 1.4rem;
}
@media (max-width: 600px) {
  .hero .eyebrow {
    white-space: normal;
  }
}
.hero .accent {
  color: var(--cyan);
}
.hero .lead {
  margin-top: 1.6rem;
}
.hero-cta {
  margin-top: 2.4rem;
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.scroll-cue {
  position: absolute;
  bottom: 2rem;
  left: var(--gutter);
  font-family: var(--font-display);
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--text-faint);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.scroll-cue span {
  width: 1px;
  height: 40px;
  background: linear-gradient(var(--cyan), transparent);
  animation: cue 2.2s var(--ease) infinite;
  transform-origin: top;
}
@keyframes cue {
  0% { transform: scaleY(0); opacity: 0; }
  40% { transform: scaleY(1); opacity: 1; }
  100% { transform: scaleY(1); opacity: 0; }
}

/* Section-Header */
.section-head {
  max-width: 60ch;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}
.section-head h2 {
  margin-top: 1rem;
}
.section-head p {
  margin-top: 1.1rem;
  max-width: 54ch;
}

/* Säulen-Raster */
.pillars {
  display: grid;
  gap: 1.4rem;
  grid-template-columns: repeat(3, 1fr);
}
.numbered {
  counter-reset: item;
}

/* Leistungen */
.services {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, 1fr);
}

/* Ansatz / Split */
.split {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}
.split .media {
  aspect-ratio: 4 / 5;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--surface);
  position: relative;
}
.split .media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Brand-Film */
.film-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 70% 20%, rgba(34, 211, 238, 0.14), transparent 55%),
    linear-gradient(160deg, var(--steel), var(--navy-deep));
}
.film-frame::after {
  content: "Brand-Film folgt";
  position: absolute;
  inset: auto 0 1.2rem 0;
  text-align: center;
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.film-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.film-frame.has-video::after {
  display: none;
}

/* Case Studies */
.cases {
  display: grid;
  gap: 1.4rem;
  grid-template-columns: repeat(2, 1fr);
}

/* Kontakt */
.contact {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}
.contact-info p {
  margin-top: 1rem;
}
.contact-details {
  margin-top: 2rem;
  display: grid;
  gap: 0.9rem;
  list-style: none;
  padding: 0;
}
.contact-details a {
  color: var(--text);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--line-soft);
  padding-block: 3.5rem;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.footer-inner img {
  height: 40px;
}
.footer-links {
  display: flex;
  gap: 1.4rem;
  list-style: none;
  padding: 0;
  flex-wrap: wrap;
}
.footer-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
}
.footer-copy {
  color: var(--text-faint);
  font-size: 0.85rem;
}

/* Hamburger + Mobile-Menu */
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: transparent;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text);
  transition: transform 0.3s var(--ease), opacity 0.2s var(--ease);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.4rem;
  padding: 7rem var(--gutter) 3rem;
  background: var(--glass);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity 0.35s var(--ease), transform 0.35s var(--ease), visibility 0.35s;
}
.mobile-menu.open {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.mobile-menu a.m-link {
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 6vw, 2.4rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}
.mobile-menu a.m-link:hover {
  color: var(--cyan);
}
.mobile-menu .m-foot {
  margin-top: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

/* Responsive */
@media (max-width: 900px) {
  .split,
  .contact {
    grid-template-columns: 1fr;
  }
  .pillars,
  .services,
  .cases {
    grid-template-columns: 1fr;
  }
  .nav-links {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .header-actions > .btn {
    display: none;
  }
}
@media (min-width: 901px) {
  .mobile-menu {
    display: none;
  }
}