/* Schrift selbst ausgeliefert: keine Anfrage an Google, passt zur CSP (font-src 'self') */
@font-face {
  font-family: "Atkinson Hyperlegible";
  font-weight: 400;
  font-display: swap;
  src: url("../fonts/atkinson-hyperlegible-latin-400.woff2") format("woff2");
}
@font-face {
  font-family: "Atkinson Hyperlegible";
  font-weight: 700;
  font-display: swap;
  src: url("../fonts/atkinson-hyperlegible-latin-700.woff2") format("woff2");
}

:root {
  --color-primary: #0F172A;
  --color-on-primary: #FFFFFF;
  --color-secondary: #334155;
  --color-accent: #0369A1;
  --color-background: #F8FAFC;
  --color-foreground: #020617;
  --color-muted: #E8ECF1;
  --color-border: #E2E8F0;
  --color-destructive: #DC2626;
  --font-body: "Atkinson Hyperlegible", system-ui, sans-serif;
  --header-height: 64px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--color-background);
  color: var(--color-foreground);
  line-height: 1.6;
  font-size: 16px;
}

a { color: var(--color-accent); }
a:focus-visible, button:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 2px; }

.site-header {
  position: sticky;
  top: 0;
  height: var(--header-height);
  display: flex;
  align-items: center;
  padding: 0 24px;
  background: var(--color-primary);
  color: var(--color-on-primary);
  z-index: 10;
}
.site-header a { color: var(--color-on-primary); text-decoration: none; font-weight: 700; }

.page-body { padding-top: 0; }

.breadcrumb {
  font-size: 14px;
  color: var(--color-secondary);
  padding: 16px 24px 0;
}
.breadcrumb a { color: var(--color-secondary); }

.layout-grid {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 32px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}
@media (max-width: 768px) {
  .layout-grid { grid-template-columns: 1fr; }
}

.sidebar-nav { border-right: 1px solid var(--color-border); padding-right: 16px; }
.sidebar-nav ul { list-style: none; margin: 0; padding: 0; }
.sidebar-nav li { margin-bottom: 4px; }
.sidebar-nav a {
  display: block;
  padding: 8px 12px;
  border-radius: 6px;
  text-decoration: none;
  color: var(--color-secondary);
}
.sidebar-title {
  margin: 0 0 8px;
  padding: 0 12px;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-secondary);
}
.sidebar-more { margin: 16px 0 0; padding-top: 12px; border-top: 1px solid var(--color-border); }
.layout-single { grid-template-columns: minmax(0, 1fr); }
.bereiche { padding-left: 1.2em; }
.bereiche li { margin-bottom: 6px; }
.sidebar-nav a[aria-current="page"] {
  background: var(--color-muted);
  color: var(--color-primary);
  font-weight: 700;
}

.content-column { max-width: 70ch; }
.content-column h1 { font-size: 32px; }
.content-column h2 { font-size: 24px; margin-top: 2em; }
.content-column img {
  max-width: 100%;
  height: auto;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  margin: 8px 0 4px;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.08);
}
.hb-video { margin: 16px 0 28px; }
.hb-video[hidden] { display: none; }
.hb-video video {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--color-primary);
  border-radius: 6px;
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.08);
}
.hb-video figcaption { font-size: 14px; color: var(--color-secondary); margin-top: 6px; }
.screenshot-caption {
  font-size: 14px;
  color: var(--color-secondary);
  margin: 0 0 24px;
}

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 24px;
  color: var(--color-secondary);
  font-size: 14px;
  text-align: center;
}