:root {
  /* Brandfarben nach Vorgabe */
  --color-primary: #003399;   /* Hauptfarbe */
  --color-accent: #ffff00;    /* Akzentkästchen */
  --color-cyan: #00ffff;      /* CMYK 100/0/0/0 */
  --color-cyan-soft: #b3ffff; /* CMYK 30/0/0/0 */
  --color-bg: #ffffff;
  --color-text: #000000;
  --color-muted: #555555;

  /* Typografie (pt → rem approximiert bei 16px Basis) */
  --fs-base: 0.8rem;  /* ~9 pt – Fließtext */
  --fs-xs: 0.7rem;    /* ~8 pt – Bildunterschriften, Autorenzeile */
  --fs-s: 0.8rem;     /* ~9 pt – Zwischenüberschriften, Vorspann */
  --fs-m: 0.9rem;     /* ~10 pt – Kapitelnamen */
  --fs-l: 1.1rem;     /* ~13 pt – Unterüberschriften, Zitate */
  --fs-xl: 1.6rem;    /* ~20 pt – große Überschrift */

  /* Spationierung */
  --letter-spacing-body: 0.03em;
  --letter-spacing-heading: 0.04em;
}

/* Reset & Grundlayout */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: "Times New Roman", Times, serif;
  font-size: var(--fs-base);
  line-height: 1.4;
  letter-spacing: var(--letter-spacing-body);
}

/* Barrierefreiheit: Skip-Link & Fokus */

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  padding: 0.5rem 1rem;
  background: #000000;
  color: #ffffff;
  z-index: 1000;
  text-decoration: none;
  font-size: var(--fs-s);
}

.skip-link:focus-visible {
  left: 0.5rem;
  top: 0.5rem;
}

:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 3px;
}

/* Container & Sektionen */

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

.section {
  margin-bottom: 2.5rem;
  position: relative;
}

/* kleines blaues Kästchen am Abschnittsende */

.section::after {
  content: "";
  display: block;
  width: 0.4rem;
  height: 0.4rem;
  background: var(--color-primary);
  margin-left: auto;
  margin-top: 0.75rem;
}

/* Kopfbereich mit blauem Balken & Logo */

.site-header {
  background-color: var(--color-bg);
  border-bottom: 1px solid #dde3f0;
}

.header-blue-bar {
  background-color: var(--color-primary);
  color: #ffffff;
}

.header-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0.75rem 1rem;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
}

.site-title-block {
  max-width: 70%;
}

.site-title {
  margin: 0;
  font-family: Arial, "Helvetica Neue", system-ui, -apple-system, sans-serif;
  font-size: var(--fs-xl); /* ~20 pt */
  font-weight: 700;
  letter-spacing: var(--letter-spacing-heading);
  color: #ffffff;
}

.site-subtitle {
  margin: 0.2rem 0 0;
  font-family: Arial, "Helvetica Neue", system-ui, -apple-system, sans-serif;
  font-size: var(--fs-s);
  letter-spacing: var(--letter-spacing-heading);
  color: #e0e6ff;
}

.site-logo img {
  max-height: 52px;
  width: auto;
}

/* Navigation */

.main-nav {
  max-width: 960px;
  margin: 0 auto;
  padding: 0.4rem 1rem 0.7rem;
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  border-bottom: 2px solid var(--color-primary);
}

.main-nav a {
  font-family: Arial, "Helvetica Neue", system-ui, -apple-system, sans-serif;
  font-size: var(--fs-s);
  text-decoration: none;
  color: var(--color-primary);
  font-weight: 700;
  letter-spacing: var(--letter-spacing-heading);
}

.main-nav a:hover,
.main-nav a:focus-visible {
  text-decoration: underline;
}

/* Überschriften-Hierarchie */

.heading-xl,
.heading-l,
.heading-s,
.chapter-title {
  font-family: Arial, "Helvetica Neue", system-ui, -apple-system, sans-serif;
  color: var(--color-primary);
  letter-spacing: var(--letter-spacing-heading);
  text-align: left;
  margin: 0 0 0.5rem;
}

.heading-xl {
  font-size: var(--fs-xl); /* ~20 pt */
  font-weight: 700;
}

.heading-l {
  font-size: var(--fs-l);  /* ~13 pt */
  font-weight: 700;
}

.heading-s {
  font-size: var(--fs-s);  /* ~9 pt */
  font-weight: 700;
}

.chapter-title {
  font-size: var(--fs-m);  /* ~10 pt */
  font-weight: 700;
}

/* Vorspann & Fließtext */

.lede {
  font-family: Arial, "Helvetica Neue", system-ui, -apple-system, sans-serif;
  font-size: var(--fs-s);  /* ~9 pt */
  font-weight: 700;
  letter-spacing: var(--letter-spacing-heading);
  color: var(--color-primary);
  text-align: justify;
  text-justify: inter-word;
  margin: 0 0 0.5rem;
}

.body-text {
  font-family: "Times New Roman", Times, serif;
  font-size: var(--fs-base); /* ~9 pt */
  letter-spacing: var(--letter-spacing-body);
  text-align: justify;
  text-justify: inter-word;
  margin: 0 0 0.75rem;
}

/* Zitate */

blockquote {
  margin: 1rem 0 0.25rem;
  padding-left: 1rem;
  border-left: 3px solid var(--color-primary);
  font-family: "Times New Roman", Times, serif;
  font-style: italic;
  font-size: var(--fs-l); /* ~13 pt */
  color: var(--color-primary);
}

.quote-author {
  display: block;
  font-family: "Times New Roman", Times, serif;
  font-size: var(--fs-xs); /* ~8 pt */
  text-align: right;
  color: var(--color-muted);
}

/* Bildunterschriften */

.caption {
  font-family: Arial, "Helvetica Neue", system-ui, -apple-system, sans-serif;
  font-size: var(--fs-xs);   /* ~8 pt */
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: var(--letter-spacing-heading);
  margin-top: 0.25rem;
}

/* Akzent-Überschriften: gelbes Kästchen + gestrichelte Linie */

.accent-heading-row {
  display: flex;
  align-items: flex-start;
  gap: 0.4rem;
  margin-bottom: 0.75rem;
}

.accent-heading-box {
  width: 0.35rem;
  height: 0.8rem;
  background-color: var(--color-accent);
  margin-top: 0.15rem;
  flex-shrink: 0;
}

.accent-heading-line {
  flex-shrink: 0;
  width: 0;
  border-left: 1px dashed var(--color-primary);
  margin-top: 0.15rem;
  height: 1.6rem;
}

.accent-heading-row .heading-xl,
.accent-heading-row .heading-l,
.accent-heading-row .heading-s,
.accent-heading-row .chapter-title {
  margin: 0;
}

/* Aufzählungen mit vertikaler Linie + Kästchen */

.accent-list {
  list-style: none;
  margin: 0.5rem 0 0.5rem;
  padding-left: 1.5rem;
  position: relative;
}

.accent-list::before {
  content: "";
  position: absolute;
  left: 0.35rem;
  top: 0;
  bottom: 0;
  border-left: 1px dashed var(--color-primary);
}

.accent-list li {
  position: relative;
  margin-bottom: 0.25rem;
  padding-left: 0.8rem;
  font-family: "Times New Roman", Times, serif;
  font-size: var(--fs-base);
  text-align: justify;
  text-justify: inter-word;
}

.accent-list li::before {
  content: "";
  position: absolute;
  left: -0.1rem;
  top: 0.5em;
  width: 0.35rem;
  height: 0.35rem;
  background-color: var(--color-primary);
}

/* Karten / Boxen */

.card {
  border: 1px solid #d1d9eb;
  border-radius: 0;
  padding: 1rem;
  background: #f7f8fc;
}

.card-title {
  font-family: Arial, "Helvetica Neue", system-ui, -apple-system, sans-serif;
  font-size: var(--fs-m);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: var(--letter-spacing-heading);
  margin: 0 0 0.5rem;
}

/* News- & Download-Listen */

.download-list,
.news-list {
  list-style: none;
  padding: 0;
  margin: 0.75rem 0 0;
}

.download-item,
.news-item {
  padding: 0.6rem 0;
  border-top: 1px solid #e0e5f2;
}

.download-item:last-child,
.news-item:last-child {
  border-bottom: 1px solid #e0e5f2;
}

.download-title {
  font-family: Arial, "Helvetica Neue", system-ui, -apple-system, sans-serif;
  font-size: var(--fs-m);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: var(--letter-spacing-heading);
}

.download-meta,
.news-meta {
  font-family: "Times New Roman", Times, serif;
  font-size: var(--fs-xs);
  color: var(--color-muted);
}

.badge {
  display: inline-block;
  padding: 0.1rem 0.45rem;
  border-radius: 999px;
  font-size: var(--fs-xs);
  border: 1px solid var(--color-primary);
  background-color: var(--color-cyan-soft);
  color: var(--color-primary);
}

/* Links */

a {
  color: var(--color-primary);
}

a:hover {
  text-decoration: underline;
}

/* Footer */

.site-footer {
  border-top: 1px solid #dde3f0;
  padding: 1rem;
  font-family: "Times New Roman", Times, serif;
  font-size: var(--fs-xs);
  color: var(--color-muted);
  text-align: left;
}

/* Responsiv */

@media (max-width: 640px) {
  .header-inner {
    flex-direction: row;
    align-items: center;
  }

  .site-title-block {
    max-width: 100%;
  }

  .main-nav {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .container {
    padding-left: 0.75rem;
    padding-right: 0.75rem;
  }

  .section::after {
    margin-right: 0.25rem;
  }
}