:root {
  --color-primary: #194180;
  --color-primary-dark: #123063;
  --color-secondary: #294f8b;
  --color-bg-light: #f7fbfe;
  --color-bg: #ffffff;
  --color-text: #253045;
  --color-text-light: #5a6779;
  --border-radius: 4px;
  --max-width: 1180px;
  --font-base: "Source Sans 3", "Segoe UI", Arial, Helvetica, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-base);
  color: var(--color-text);
  line-height: 1.65;
  background: var(--color-bg);
}

img { max-width: 100%; display: block; }

a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid #eef1f5;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  padding-bottom: 14px;
  gap: 24px;
}

.site-logo img { height: 48px; width: auto; }

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: auto;
}

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 26px;
  margin: 0;
  padding: 0;
}

.main-nav a {
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.95rem;
  white-space: nowrap;
}

.main-nav a:hover { text-decoration: none; color: var(--color-secondary); }

.btn {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  padding: 12px 26px;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  white-space: nowrap;
}

.btn:hover { background: var(--color-primary-dark); text-decoration: none; color: #fff; }

.main-nav a.btn,
.main-nav a.btn:hover { color: #fff; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  display: block;
  width: 26px;
  height: 3px;
  margin: 5px 0;
  background: var(--color-primary);
}

/* Page header / banner */
.page-banner {
  position: relative;
  height: 260px;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(18, 48, 99, 0.55);
}

.page-banner h1 {
  position: relative;
  color: #fff;
  font-size: 2.4rem;
  font-weight: 400;
  margin: 0;
  text-align: center;
  padding: 0 20px;
}

/* Hero (homepage) */
.hero {
  background: var(--color-bg-light);
  padding: 70px 0;
}

.hero .container {
  display: flex;
  align-items: center;
  gap: 60px;
}

.hero-image { flex: 1 1 45%; }
.hero-image img { border-radius: var(--border-radius); }

.hero-text { flex: 1 1 55%; }

.hero-text .eyebrow {
  color: var(--color-secondary);
  font-weight: 600;
  margin-bottom: 10px;
}

.hero-text h1 {
  color: var(--color-primary);
  font-size: 2.3rem;
  font-weight: 400;
  line-height: 1.3;
  margin: 0 0 22px;
}

.hero-text p { margin: 0 0 16px; }
.hero-text p.lead { font-weight: 600; color: var(--color-primary); }

/* Generic section */
.section { padding: 70px 0; }
.section.alt { background: var(--color-bg-light); }

.section h2 {
  color: var(--color-primary);
  font-weight: 400;
  font-size: 1.9rem;
  margin: 0 0 24px;
}

.section h3 {
  color: var(--color-primary);
  font-weight: 600;
  font-size: 1.15rem;
  margin: 0 0 8px;
}

/* Profile section */
.profile {
  display: flex;
  gap: 50px;
  align-items: center;
}

.profile img {
  width: 220px;
  height: 220px;
  object-fit: cover;
  border-radius: 50%;
}

.profile-text { flex: 1; }

/* Leistungsspektrum: image + accordion side by side */
.leistung-layout {
  display: flex;
  gap: 50px;
  align-items: flex-start;
}

.leistung-image { flex: 0 0 33%; }

.leistung-image img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  border-radius: var(--border-radius);
}

.leistung-content { flex: 1 1 auto; min-width: 0; }

/* Accordion */
.accordion { display: grid; gap: 14px; margin-top: 26px; }

.accordion details {
  background: #fff;
  border-left: 4px solid var(--color-secondary);
  border-radius: var(--border-radius);
  overflow: hidden;
}

.accordion summary {
  cursor: pointer;
  list-style: none;
  padding: 18px 24px;
  font-weight: 600;
  color: var(--color-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

.accordion summary::-webkit-details-marker { display: none; }

.accordion summary::after {
  content: "+";
  font-size: 1.4rem;
  line-height: 1;
  color: var(--color-secondary);
  flex: 0 0 auto;
}

.accordion details[open] summary::after { content: "\2013"; }

.accordion .accordion-body {
  padding: 0 24px 20px;
  color: var(--color-text-light);
}

/* Two-column content w/ side image */
.two-col {
  display: flex;
  gap: 50px;
  align-items: flex-start;
}

.two-col .col-text { flex: 1 1 60%; }
.two-col .col-image { flex: 1 1 40%; }
.two-col .col-image img { border-radius: var(--border-radius); }

/* Lists */
ul.plain { padding-left: 20px; margin: 12px 0 24px; }
ul.plain li { margin-bottom: 6px; }

.two-list-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px 60px;
  margin-top: 20px;
}

.two-list-grid .group h3 {
  border-bottom: 2px solid var(--color-bg-light);
  padding-bottom: 8px;
  margin-bottom: 14px;
}

/* Partners */
.partners {
  display: flex;
  gap: 50px;
  flex-wrap: wrap;
  margin-top: 24px;
}

.partner-card {
  background: var(--color-bg-light);
  padding: 24px;
  border-radius: var(--border-radius);
  flex: 1 1 260px;
}

.partner-card img { height: 60px; width: auto; margin-bottom: 14px; }

/* Contact */
.contact-grid {
  display: flex;
  gap: 60px;
  align-items: flex-start;
}

.contact-info { flex: 1 1 40%; }
.contact-map { flex: 1 1 60%; }
.contact-map img { border-radius: var(--border-radius); }

.contact-info address { font-style: normal; margin-bottom: 20px; line-height: 1.8; }

.contact-info .btn { margin-top: 6px; }

/* Footer */
.site-footer {
  background: var(--color-bg-light);
  padding: 30px 0;
  margin-top: 0;
}

.site-footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.9rem;
  color: var(--color-text-light);
}

.site-footer nav ul {
  list-style: none;
  display: flex;
  gap: 20px;
  margin: 0;
  padding: 0;
}

/* Legal pages */
.legal h2 { font-size: 1.3rem; margin-top: 34px; }
.legal p, .legal ul { color: var(--color-text-light); }

/* Responsive */
@media (max-width: 900px) {
  .hero .container, .two-col, .profile, .contact-grid, .leistung-layout { flex-direction: column; }
  .leistung-image img { height: 220px; }
  .two-list-grid { grid-template-columns: 1fr; }
  .main-nav {
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 24px 28px;
    border-bottom: 1px solid #eef1f5;
    display: none;
    gap: 20px;
  }
  .main-nav.open { display: flex; }
  .main-nav ul { flex-direction: column; gap: 16px; width: 100%; }
  .nav-toggle { display: block; }
  .page-banner h1 { font-size: 1.8rem; }
}