/* =========================================================
   LAYOUT
   Container, Kopfbereich, Navigation, Abschnitte, Fußbereich.
   ========================================================= */

/* ---------- Container ---------- */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container.narrow {
  max-width: var(--container-narrow);
}

.center {
  text-align: center;
}

/* ---------- Kopfbereich ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.site-header.is-scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: 0 4px 20px rgba(15, 61, 122, 0.06);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  line-height: 1.25;
}

.brand-name {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-primary);
}

.brand-sub {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* ---------- Navigation ---------- */
.site-nav ul {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a {
  display: block;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
}

.site-nav a:hover,
.site-nav a.is-active {
  background: var(--color-accent-soft);
  color: var(--color-accent-dark);
}

.site-nav a.nav-cta {
  background: var(--color-accent);
  color: var(--color-text-inverse);
  margin-left: 0.6rem;
}

.site-nav a.nav-cta:hover {
  background: var(--color-accent-dark);
}

/* Burger-Button (nur mobil sichtbar) */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 10px;
  background: none;
  border: 0;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-primary);
  transition: transform var(--transition), opacity var(--transition);
}

.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); }

@media (max-width: 820px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    padding: 1rem 1.5rem 1.5rem;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 16px 30px rgba(15, 61, 122, 0.1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  }

  .site-nav.is-open {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .site-nav ul {
    flex-direction: column;
    align-items: stretch;
  }

  .site-nav a {
    padding: 0.8rem 1rem;
    font-size: 1.05rem;
  }

  .site-nav a.nav-cta {
    margin: 0.5rem 0 0;
    text-align: center;
  }
}

/* ---------- Abschnitte ---------- */
.section {
  padding: var(--section-padding) 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section-head {
  max-width: 640px;
  margin-bottom: 2.5rem;
}

.section-head.center {
  margin-left: auto;
  margin-right: auto;
}

/* Einleitung: Überschrift links, Text rechts */
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: clamp(2rem, 6vw, 5rem);
}

/* Über mich: Bild links, Text rechts */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
}

@media (max-width: 900px) {
  .intro-grid,
  .about-grid {
    grid-template-columns: 1fr;
  }
}

/* ---------- Fußbereich ---------- */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 2rem 0;
  font-size: var(--fs-small);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
}

.footer-inner p {
  margin: 0;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
}

.footer-links a:hover,
.footer-links a[aria-current="page"] {
  color: var(--color-text-inverse);
  text-decoration: underline;
}