/* ==========================================================================
   BFV Brandenburger Fachverlag – Stylesheet
   Schriften liegen auf dem eigenen Server (Ordner /fonts). Keine Ressourcen Dritter.
   ========================================================================== */

@font-face { font-family: "BFV Serif"; src: url("../fonts/liberation-serif-regular.woff2") format("woff2"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "BFV Serif"; src: url("../fonts/liberation-serif-italic.woff2") format("woff2"); font-weight: 400; font-style: italic; font-display: swap; }
@font-face { font-family: "BFV Sans"; src: url("../fonts/inter-regular.woff2") format("woff2"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "BFV Sans"; src: url("../fonts/inter-medium.woff2") format("woff2"); font-weight: 500; font-style: normal; font-display: swap; }
@font-face { font-family: "BFV Sans"; src: url("../fonts/inter-semibold.woff2") format("woff2"); font-weight: 600; font-style: normal; font-display: swap; }

:root {
  --black: #000;
  --white: #fff;
  --grey: #6a6a6a;
  --grey-soft: #cfcfcf;
  --grey-light: #f2f2f2;
  --rule: #d6d6d6;

  --serif: "BFV Serif", "Liberation Serif", "Times New Roman", serif;
  --sans: "BFV Sans", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;

  --wrap: 78rem;
  --gutter: clamp(1.25rem, 5vw, 4rem);
  --block: clamp(4.5rem, 9vw, 7.5rem);
}

/* --- Basis ---------------------------------------------------------------- */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--white);
  color: var(--black);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  hyphens: auto;
  -webkit-hyphens: auto;
  overflow-wrap: break-word;
}
img, svg { display: block; max-width: 100%; height: auto; }
h1, h2, h3, p, ul, ol, dl, dd { margin: 0; }
h1, h2, h3 { hyphens: manual; -webkit-hyphens: manual; }
p + p { margin-top: 1em; }
a { color: inherit; text-underline-offset: 0.2em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid currentColor; outline-offset: 4px; }
::selection { background: var(--black); color: var(--white); }

.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gutter); }
.skip-link { position: absolute; left: var(--gutter); top: -100px; padding: .6rem 1rem; background: var(--black); color: var(--white); z-index: 10; }
.skip-link:focus { top: .75rem; }

.reg { font-size: .55em; vertical-align: .75em; line-height: 0; margin-left: .05em; }

/* --- Kopf ----------------------------------------------------------------- */

.site-header .wrap {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 1rem 2.5rem; padding-block: 2rem;
}
.logo { display: inline-block; }
.logo img { height: 3rem; width: auto; }
.site-nav ul { display: flex; flex-wrap: wrap; gap: .5rem 2rem; padding: 0; list-style: none; font-size: .9688rem; }
.site-nav a { text-decoration: none; padding-block: .25rem; border-bottom: 1px solid transparent; }
.site-nav a:hover, .site-nav a[aria-current="page"] { border-bottom-color: currentColor; }

/* --- Typografie-Bausteine ------------------------------------------------- */

.display {
  font-family: var(--serif); font-weight: 400;
  font-size: clamp(2.75rem, 8.2vw, 7.25rem);
  line-height: 1.02; letter-spacing: -0.02em;
}
.display span { display: block; }

.page-title {
  font-family: var(--serif); font-weight: 400;
  font-size: clamp(2.5rem, 6.4vw, 5.5rem);
  line-height: 1.04; letter-spacing: -0.02em;
  max-width: 16ch;
}

.h2 {
  font-family: var(--serif); font-weight: 400;
  font-size: clamp(1.875rem, 3.6vw, 3rem);
  line-height: 1.1; letter-spacing: -0.01em;
  max-width: 22ch;
}

.h3 {
  font-family: var(--serif); font-weight: 400;
  font-size: clamp(1.375rem, 2vw, 1.625rem);
  line-height: 1.2;
}

.statement {
  font-family: var(--serif);
  font-size: clamp(1.2rem, 1.7vw, 1.4rem);
  line-height: 1.6;
}

.muted { color: var(--grey); }

/* --- Einstieg (Start und Unterseiten) ------------------------------------- */

.hero { padding-block: clamp(4rem, 12vw, 10rem) clamp(4rem, 9vw, 7rem); }
.page-head { padding-block: clamp(3.5rem, 9vw, 7.5rem) clamp(3.5rem, 7vw, 6rem); }

.split {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 2rem 3rem;
}
.split > .right { grid-column: 2; max-width: 42rem; }
.hero .split, .page-head .split { margin-top: clamp(2.5rem, 6vw, 5rem); }

.actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2.5rem; }
.button {
  display: inline-block; padding: .9rem 1.5rem;
  border: 1px solid var(--black); font-size: .9688rem; line-height: 1.4; text-decoration: none;
  background: var(--black); color: var(--white);
}
.button:hover { background: var(--white); color: var(--black); }
.button--ghost { background: transparent; color: var(--black); }
.button--ghost:hover { background: var(--black); color: var(--white); }

/* --- Abschnitte ----------------------------------------------------------- */

.block { padding-block: var(--block); }
.block + .block { padding-top: 0; }
.block--grey { background: var(--grey-light); }
.block--grey + .block, .block + .block--grey { padding-top: var(--block); }
.block--black { background: var(--black); color: var(--white); }
.block--black + .block { padding-top: var(--block); }
.block--black .muted, .block--black .lead { color: var(--grey-soft); }
.block--black ::selection { background: var(--white); color: var(--black); }

.block-head { display: grid; grid-template-columns: 5fr 7fr; gap: 1.5rem 3rem; align-items: end; margin-bottom: clamp(2.5rem, 5vw, 4rem); }
.block-head .lead { max-width: 42rem; color: #333; }
.block--black .block-head .lead { color: var(--grey-soft); }

/* Kacheln: gleiche Größe, Fläche statt Linie */
.tiles { display: grid; gap: 1.25rem; padding: 0; list-style: none; }
.tiles--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.tiles--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.tiles--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.tile {
  display: flex; flex-direction: column;
  padding: clamp(1.5rem, 2.6vw, 2.25rem);
  background: var(--grey-light);
}
.block--grey .tile { background: var(--white); }
.block--black .tile { background: #1c1c1c; }
.tile .h3 { margin-bottom: .9rem; }
.tile p { color: #333; font-size: 1rem; }
.block--black .tile p { color: var(--grey-soft); }
.tile .num {
  font-family: var(--serif); font-size: 3.25rem; line-height: 1;
  margin-bottom: 1.5rem; font-variant-numeric: lining-nums;
}

/* Zeilen: Titel links, Text rechts */
.rows { padding: 0; list-style: none; display: grid; gap: 1.25rem; }
.rows li {
  display: grid; grid-template-columns: 5fr 7fr; gap: 1rem 3rem;
  padding: clamp(1.5rem, 2.6vw, 2.25rem);
  background: var(--grey-light);
}
.rows p { color: #333; max-width: 42rem; }

/* Fließtext zweispaltig */
.prose-split { display: grid; grid-template-columns: 5fr 7fr; gap: 1.5rem 3rem; }
.prose-split .right { grid-column: 2; max-width: 42rem; color: #333; }

/* Hinweis / CTA */
.cta {
  display: grid; grid-template-columns: 5fr 7fr; gap: 1.5rem 3rem; align-items: start;
  padding: clamp(2rem, 4vw, 3.5rem);
  background: var(--black); color: var(--white);
}
.cta p { color: var(--grey-soft); max-width: 40rem; }
.cta .button { background: var(--white); color: var(--black); border-color: var(--white); }
.cta .button:hover { background: var(--black); color: var(--white); }
.cta .small { margin-top: 1.25rem; font-size: .875rem; }
.cta ::selection { background: var(--white); color: var(--black); }

.note { margin-top: 2rem; font-size: .9375rem; color: var(--grey); max-width: 46rem; }

/* --- Startseite: Inhaltsverzeichnis --------------------------------------- */

.contents { padding-bottom: clamp(5rem, 11vw, 9rem); }
.contents .h2 { padding-bottom: 1.5rem; border-bottom: 2px solid var(--black); max-width: none; }
.toc { padding: 0; list-style: none; }
.toc a {
  display: grid;
  grid-template-columns: 5fr 6fr auto;
  align-items: center;
  gap: 1rem 2rem;
  padding: 2rem 0;
  border-bottom: 1px solid var(--rule);
  text-decoration: none;
  transition: padding .2s ease, background-color .2s ease;
}
.toc .t { font-family: var(--serif); font-size: clamp(1.5rem, 2.6vw, 2.125rem); line-height: 1.15; }
.toc .d { color: var(--grey); }
.toc svg { width: 2.25rem; height: 2.25rem; }
.toc a:hover { padding-inline: 1rem; background: var(--grey-light); }
@media (prefers-reduced-motion: reduce) { .toc a { transition: none; } }

.invite { background: var(--black); color: var(--white); padding-block: clamp(5rem, 11vw, 9rem); }
.invite .wrap { display: grid; grid-template-columns: 5fr 7fr; gap: 2rem 3rem; align-items: end; }
.invite h2 { font-family: var(--serif); font-weight: 400; font-size: clamp(2.25rem, 5vw, 4.25rem); line-height: 1.05; letter-spacing: -0.015em; }
.invite p { max-width: 40rem; color: var(--grey-soft); font-size: 1.125rem; }
.invite .button { background: var(--white); color: var(--black); border-color: var(--white); }
.invite .button:hover { background: var(--black); color: var(--white); }
.invite ::selection { background: var(--white); color: var(--black); }

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

.facts { display: grid; grid-template-columns: 9rem minmax(0, 1fr); gap: .4rem 1.5rem; }
.facts dt { color: var(--grey); }
.facts dd { margin: 0; }
address { font-style: normal; }

/* --- Rechtstexte ---------------------------------------------------------- */

.legal { max-width: 46rem; }
.legal h2 { margin-top: 3.25rem; font-family: var(--serif); font-weight: 400; font-size: 1.75rem; line-height: 1.2; }
.legal h3 { margin-top: 2rem; font-size: 1.0625rem; font-weight: 600; }
.legal p, .legal ul, .legal address, .legal .facts { margin-top: .9rem; color: #333; }
.legal ul { padding-left: 1.2rem; }
.legal li + li { margin-top: .35rem; }
.legal strong { color: var(--black); font-weight: 600; }
.legal .meta { margin-top: 3rem; font-size: .875rem; color: var(--grey); }
.legal .facts dt { color: var(--black); }

/* Abstand vor dem Fuß auf allen Unterseiten */
.page-end { padding-bottom: clamp(6rem, 13vw, 11rem); }

/* --- Fuß ------------------------------------------------------------------ */

.site-footer { background: var(--grey-light); padding-block: clamp(4rem, 8vw, 6rem) 2.5rem; font-size: .9375rem; }
.site-footer .cols { display: grid; grid-template-columns: 2fr 1.5fr 1.5fr 1fr; gap: 2.5rem; }
.site-footer h2 { font-size: .9375rem; font-weight: 600; margin-bottom: .75rem; }
.site-footer ul { padding: 0; list-style: none; }
.site-footer .logo img { height: 2.5rem; }
.site-footer .claim { margin-top: 1.25rem; max-width: 18rem; color: var(--grey); }
.site-footer .bottom { margin-top: 4rem; padding-top: 1.5rem; border-top: 1px solid var(--rule); color: var(--grey); font-size: .875rem; }

/* --- Responsiv ------------------------------------------------------------ */

@media (max-width: 1000px) {
  .tiles--4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
  .split, .invite .wrap, .block-head, .rows li, .prose-split, .cta { grid-template-columns: minmax(0, 1fr); }
  .split > .right, .prose-split .right { grid-column: 1; }
  .tiles--3 { grid-template-columns: minmax(0, 1fr); }
  .toc a { grid-template-columns: 1fr auto; }
  .toc .d { grid-column: 1; grid-row: 2; }
  .toc svg { grid-row: 1 / span 2; grid-column: 2; }
  .site-footer .cols { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  body { font-size: 1rem; }
  .logo img { height: 2.25rem; }
  .site-header .wrap { padding-block: 1.25rem; }
  .site-nav ul { gap: .25rem 1.25rem; }
  .tiles--2, .tiles--4 { grid-template-columns: minmax(0, 1fr); }
  .site-footer .cols { grid-template-columns: 1fr; }
  .facts { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .facts dd { margin-bottom: .75rem; }
}

@media print {
  .site-nav, .skip-link, .actions { display: none; }
  .block--black, .invite, .cta { background: none; color: #000; }
}

/* Hilfsklassen (statt Inline-Styles, wegen Content-Security-Policy) */
.actions--gap, .gap-top { margin-top: clamp(3rem, 6vw, 4.5rem); }
.legal h2.first { margin-top: 0; }
.cta--light { background: var(--grey-light); color: var(--black); }
.cta--light p { color: #333; }
.cta--light .button { background: var(--black); color: var(--white); border-color: var(--black); }
.cta--light .button:hover { background: transparent; color: var(--black); }
.cta--light ::selection { background: var(--black); color: var(--white); }