/* ==========================================================
   LAYOUT: Header, Footer, Sections, Responsive
   ========================================================== */

/* --- HEADER --- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--header-height);
  display: flex;
  align-items: center;
  padding: 0 var(--side-padding);
  transition: background-color 0.4s ease, box-shadow 0.4s ease;
  color: var(--color-white);
}

.site-header.scrolled {
  background-color: var(--color-white);
  color: var(--color-text);
  box-shadow: 0 2px 20px rgba(0,0,0,0.08);
}

/* Header über Stencil: dunkle Farben */
.site-header.stencil-active {
  background-color: transparent;
  color: var(--color-text);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
}

/* --- LOGO --- */
.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  z-index: 10;
}

.site-logo img { height: 28px; width: auto; }

.logo-light { display: block; }
.logo-dark  { display: none; }

.site-header.scrolled .logo-light,
.site-header.stencil-active .logo-light { display: block; }

.site-header.scrolled .logo-dark,
.site-header.stencil-active .logo-dark  { display: none; }

/* --- NAVIGATION --- */
.main-nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.8rem;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  position: relative;
  padding: 4px 0;
  transition: color 0.3s ease;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 1.5px;
  background: var(--color-accent);
  transition: width 0.3s var(--ease-smooth);
}

.nav-links a:hover::after { width: 100%; }

/* Aktive Navigation */
.nav-links a.active {
  color: var(--color-accent);
}

.nav-links a.active::after {
  width: 100%;
}

.site-header.scrolled .nav-links a.active {
  color: var(--color-accent);
}



/* --- NAV CTA BUTTON --- */
.nav-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  border: 1.5px solid rgba(255,255,255,0.5);
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: all 0.3s ease;
  white-space: nowrap;
}

.nav-cta-btn:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-white) !important;
}

.site-header.scrolled .nav-cta-btn,
.site-header.stencil-active .nav-cta-btn {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.nav-cta-btn svg {
  width: 14px; height: 14px;
  transition: transform 0.3s ease;
}

.nav-cta-btn:hover svg { transform: translateX(3px); }

/* --- MOBILE TOGGLE --- */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none; border: none;
  cursor: pointer; padding: 8px;
  z-index: 10;
}

.menu-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: all 0.3s ease;
}

.menu-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --- MOBILE MENU OVERLAY --- */
.mobile-menu {
  position: fixed; inset: 0;
  background: var(--color-dark);
  z-index: 999;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 8px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

.mobile-menu.open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu a {
  display: block;
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-white);
  padding: 10px 0;
  text-align: center;
  transition: color 0.3s ease;
}

.mobile-menu a:hover { color: var(--color-accent); }
.mobile-menu .mobile-lang-switcher { margin-top: 24px; }

/* --- SECTION COMMONS --- */
.section {
  padding: var(--section-padding) var(--side-padding);
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-pretitle {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.section-heading {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--color-dark);
  margin-bottom: 20px;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-light);
  max-width: 600px;
  line-height: 1.7;
}

/* --- FOOTER --- */
.site-footer {
  background: var(--color-off-white);
  padding: 60px var(--side-padding) 30px;
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 50px;
}

.footer-brand-text {
  font-size: 0.92rem;
  color: var(--color-text-light);
  line-height: 1.8;
  max-width: 320px;
}

.footer-heading {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-dark);
  margin-bottom: 18px;
}

.footer-links a {
  display: block;
  font-size: 0.9rem;
  color: var(--color-text-light);
  padding: 4px 0;
  transition: color 0.3s ease;
}

.footer-links a:hover { color: var(--color-accent); }

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-copyright {
  font-size: 0.82rem;
  color: var(--color-text-light);
}

.footer-bottom-links { display: flex; gap: 20px; }

.footer-bottom-links a {
  font-size: 0.82rem;
  color: var(--color-text-light);
  transition: color 0.3s ease;
}

.footer-bottom-links a:hover { color: var(--color-accent); }

/* ==========================================================
   RESPONSIVE
   ========================================================== */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .nav-links,
  .nav-cta-btn,
  .lang-switcher.desktop-only { display: none; }

  .menu-toggle { display: flex; }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}