/* ============================================================
   aqua — für die öffentliche Verwaltung
   Farbwelt: gedecktes Dienststellen-Blau + aqua-Türkis (Akzent)
   Barrierefreiheit: Kontraste >= 4,5:1, sichtbare Fokuszustände
   ============================================================ */

:root {
  --color-primary: #0b3556;        /* Dienststellen-Blau */
  --color-primary-dark: #082741;
  --color-accent: #0e7c86;         /* aqua-Türkis (Abdunklung für Kontrast) */
  --color-accent-bright: #12a5b0;  /* Akzent auf dunklem Grund */
  --color-text: #1c2733;
  --color-text-muted: #45566a;
  --color-bg: #ffffff;
  --color-bg-alt: #f2f5f8;
  --color-border: #d3dce4;
  --color-focus: #e07b00;          /* Signalfarbe Fokus */
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  --content-width: 72rem;
  --text-width: 44rem;
  --radius: 4px;
}

/* ---------- Grundlagen ---------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-stack);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
}

h1, h2, h3 {
  line-height: 1.25;
  color: var(--color-primary-dark);
}

p {
  max-width: var(--text-width);
}

a {
  color: var(--color-primary);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}

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

/* Sichtbarer Fokuszustand (BITV / WCAG 2.4.7) */
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: 2px;
}

.container {
  width: 100%;
  max-width: var(--content-width);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

/* Skip-Link */
.skip-link {
  position: absolute;
  top: -4rem;
  left: 1rem;
  z-index: 100;
  padding: 0.75rem 1.25rem;
  background: var(--color-primary);
  color: #fff;
  font-weight: 600;
  transition: top 0.15s ease-out;
}

.skip-link:focus {
  top: 0;
  color: #fff;
}

/* ---------- Metanavigation ---------- */

.meta-nav {
  background: var(--color-primary-dark);
  color: #cdd8e2;
  font-size: 0.875rem;
}

.meta-nav__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding-block: 0.4rem;
}

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

.meta-nav a {
  color: #cdd8e2;
  text-decoration: none;
}

.meta-nav a:hover {
  color: #fff;
  text-decoration: underline;
}

/* ---------- Kopfbereich ---------- */

.site-header {
  background: var(--color-bg);
  border-bottom: 3px solid var(--color-primary);
  position: sticky;
  top: 0;
  z-index: 50;
}

.site-header__inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  padding-block: 0.9rem;
}

.site-header__logo {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  line-height: 1.2;
}

.site-header__logo-img {
  display: block;
  height: 2.25rem;
  width: auto;
}

.site-header__logo-claim {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-header__nav a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 500;
}

.site-header__nav a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  font: inherit;
  font-weight: 600;
  color: var(--color-primary);
  background: transparent;
  border: 2px solid var(--color-primary);
  border-radius: var(--radius);
  cursor: pointer;
}

.nav-toggle__bar {
  display: block;
  width: 1.1rem;
  height: 2px;
  background: var(--color-primary);
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  border-radius: var(--radius);
  border: 2px solid transparent;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
}

.btn--primary:hover {
  background: var(--color-primary-dark);
  color: #fff;
}

.btn--secondary {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: transparent;
}

.btn--secondary:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn--light {
  background: #fff;
  color: var(--color-primary-dark);
}

.btn--light:hover {
  background: var(--color-bg-alt);
  color: var(--color-primary-dark);
}

.btn--nav {
  padding: 0.5rem 1rem;
}

/* ---------- Hero ---------- */

.hero {
  background:
    linear-gradient(160deg, rgba(8, 39, 65, 0.92) 0%, rgba(11, 53, 86, 0.82) 70%),
    url("assets/img/hero-office.jpg") center / cover no-repeat,
    var(--color-primary-dark);
  color: #fff;
  padding-block: 4.5rem 5rem;
}

.hero__kicker {
  margin: 0 0 0.75rem;
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent-bright);
}

.hero__title {
  margin: 0 0 1.25rem;
  font-size: clamp(1.65rem, 4vw, 3rem);
  color: #fff;
  max-width: 46rem;
  overflow-wrap: break-word;
  hyphens: auto;
}

.hero__subtitle {
  margin: 0 0 2rem;
  font-size: 1.2rem;
  color: #dbe5ee;
  max-width: 44rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.hero .btn--secondary {
  border-color: #fff;
  color: #fff;
}

.hero .btn--secondary:hover {
  background: #fff;
  color: var(--color-primary-dark);
}

/* ---------- Kennzahlenband ---------- */

.facts {
  background: var(--color-bg-alt);
  border-bottom: 1px solid var(--color-border);
  padding-block: 2.25rem;
}

.facts__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
  gap: 2rem;
  margin: 0;
}

.facts__item {
  text-align: center;
}

.facts__value {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.1;
}

.facts__label {
  margin: 0.35rem 0 0;
  font-size: 0.9375rem;
  color: var(--color-text-muted);
}

/* ---------- Sektionen ---------- */

.section {
  padding-block: 4rem;
}

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

.section__title {
  margin: 0 0 1rem;
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.section__lead {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  margin-top: 0;
}

/* ---------- Karten ---------- */

.card-grid {
  display: grid;
  gap: 1.75rem;
  margin-top: 2rem;
}

.card-grid--two {
  grid-template-columns: repeat(auto-fit, minmax(min(26rem, 100%), 1fr));
}

.card-grid--four {
  grid-template-columns: repeat(auto-fit, minmax(min(15rem, 100%), 1fr));
}

.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-top: 4px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 1.75rem;
}

.section--alt .card {
  background: #fff;
}

.card__title {
  margin: 0 0 1rem;
  font-size: 1.15rem;
}

.card p:last-child {
  margin-bottom: 0;
}

/* ---------- Checkliste ---------- */

.check-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 1.9rem;
  margin-bottom: 0.9rem;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.42em;
  width: 0.55rem;
  height: 0.95rem;
  border-right: 3px solid var(--color-accent);
  border-bottom: 3px solid var(--color-accent);
  transform: rotate(45deg);
}

/* ---------- Prozesskette ---------- */

.process {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(15rem, 100%), 1fr));
  gap: 1.75rem;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.process__step {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.process__title {
  margin: 0 0 0.75rem;
  font-size: 1.05rem;
  color: var(--color-primary);
}

.process__step p {
  margin: 0;
  font-size: 0.9375rem;
}

/* ---------- Split-Layout (Text + Bild) ---------- */

.split {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 2.5rem;
  align-items: center;
  margin-top: 0.5rem;
}

.split__figure {
  margin: 0;
}

.split__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
}

@media (max-width: 52rem) {
  .split {
    grid-template-columns: 1fr;
  }
}

/* ---------- CTA-Sektion ---------- */

.section--cta {
  background:
    linear-gradient(160deg, rgba(11, 53, 86, 0.94) 0%, rgba(8, 39, 65, 0.9) 80%),
    url("assets/img/architektur.jpg") center / cover no-repeat,
    var(--color-primary-dark);
  color: #fff;
}

.section--cta__inner .section__title {
  color: #fff;
}

.section--cta__inner .section__lead {
  color: #dbe5ee;
}

.section--cta__note {
  margin-top: 1.5rem;
  font-size: 0.9375rem;
  color: #b9c8d6;
}

/* ---------- FAQ ---------- */

.faq__item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-top: 0.75rem;
  background: #fff;
}

.faq__item summary {
  padding: 1rem 1.25rem;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 3rem;
}

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

.faq__item summary::after {
  content: "+";
  position: absolute;
  right: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.5rem;
  font-weight: 400;
  color: var(--color-accent);
}

.faq__item[open] summary::after {
  content: "−";
}

.faq__answer {
  padding: 0 1.25rem 1.25rem;
}

.faq__answer p {
  margin: 0;
}

/* ---------- Kontakt ---------- */

.contact {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(20rem, 100%), 1fr));
  gap: 1.75rem;
  margin-top: 2rem;
}

.contact__block {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.75rem;
}

/* ---------- Fußzeile ---------- */

.site-footer {
  background: var(--color-primary-dark);
  color: #cdd8e2;
  padding-block: 3rem 2rem;
  font-size: 0.9375rem;
}

.site-footer__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(15rem, 100%), 1fr));
  gap: 2.5rem;
}

.site-footer__logo {
  display: block;
  height: 2rem;
  width: auto;
  margin-bottom: 0.75rem;
}

.site-footer__heading {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  color: #fff;
}

.site-footer__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer__list li {
  margin-bottom: 0.4rem;
}

.site-footer a {
  color: #cdd8e2;
}

.site-footer a:hover {
  color: #fff;
}

.site-footer address {
  font-style: normal;
  margin-bottom: 0.75rem;
}

.site-footer__note {
  margin: 2.5rem 0 0;
  padding-top: 1.25rem;
  border-top: 1px solid #1d4768;
  font-size: 0.8125rem;
  color: #93a7b8;
  max-width: none;
}

/* ---------- Reduzierte Bewegung ---------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  * {
    transition: none !important;
  }
}

/* ---------- Responsive ---------- */

@media (max-width: 52rem) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-header__nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--color-bg);
    border-bottom: 3px solid var(--color-primary);
    box-shadow: 0 0.5rem 1rem rgba(8, 39, 65, 0.15);
  }

  .site-header__nav.is-open {
    display: flex;
  }

  .site-header__nav li {
    border-top: 1px solid var(--color-border);
  }

  .site-header__nav a {
    display: block;
    padding: 0.9rem 1.25rem;
  }

  .btn--nav {
    margin: 0.75rem 1.25rem;
    text-align: center;
  }

  .hero {
    padding-block: 3rem 3.5rem;
  }
}