/* db-verspätung.de – Grundgestaltung
   Eigenständiges Design, keine Markenelemente Dritter. */

:root {
  --ink: #0f2438;
  --ink-soft: #3d5165;
  --ink-muted: #6a7b8b;
  --bg: #f7f6f3;
  --surface: #ffffff;
  --accent: #1f7a6b;
  --accent-dark: #17604f;
  --accent-soft: #e7f2ef;
  --amber: #b87a2b;
  --amber-soft: #fbf2e4;
  --line: #e3e2dd;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 2px rgba(15, 36, 56, .06), 0 8px 24px rgba(15, 36, 56, .06);
  --max: 1120px;
  --font: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

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

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

a { color: var(--accent-dark); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--ink); }

:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 2px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: #fff;
  padding: .75rem 1.25rem;
  z-index: 100;
}
.skip-link:focus { left: 1rem; top: 1rem; }

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

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

.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 50;
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
  padding-block: .7rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  text-decoration: none;
  color: var(--ink);
  font-weight: 700;
  letter-spacing: -.01em;
  font-size: 1.0625rem;
}
.brand:hover { color: var(--ink); }
.brand__mark { flex: none; }
.brand__sub {
  display: block;
  font-size: .72rem;
  font-weight: 500;
  letter-spacing: .02em;
  color: var(--ink-muted);
  text-transform: none;
  line-height: 1.2;
}

.site-nav { margin-left: auto; }

.site-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: .15rem .35rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a {
  display: inline-block;
  padding: .45rem .6rem;
  border-radius: var(--radius-sm);
  font-size: .95rem;
  color: var(--ink-soft);
  text-decoration: none;
}
.site-nav a:hover { background: var(--accent-soft); color: var(--ink); }
.site-nav a[aria-current="page"] {
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-weight: 600;
}

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

.hero {
  position: relative;
  color: #fff;
  background: #12293e url("../img/hero-bahnhof.webp") center right / cover no-repeat;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(9, 27, 44, .95) 0%, rgba(9, 27, 44, .88) 42%, rgba(9, 27, 44, .45) 72%, rgba(9, 27, 44, .2) 100%);
}
.hero__inner {
  position: relative;
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
  max-width: 40rem;
}
.hero h1 {
  font-size: clamp(1.85rem, 4.4vw, 3rem);
  line-height: 1.15;
  letter-spacing: -.02em;
  margin: 0 0 1rem;
}
.hero p.lead {
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  color: #e4ecf3;
  margin: 0 0 1.75rem;
  max-width: 34rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-bottom: 1.75rem;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem .75rem;
  font-size: .88rem;
  color: #c8d7e4;
  margin: 0;
  padding: 0;
  list-style: none;
}
.hero__meta li { display: flex; align-items: center; gap: .4rem; }
.hero__meta li::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--amber);
  flex: none;
}

/* ---------- Schaltflächen ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .8rem 1.35rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color .15s ease, color .15s ease, border-color .15s ease;
}
.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: var(--accent-dark); color: #fff; }
.btn--light { background: #fff; color: var(--ink); }
.btn--light:hover { background: #eef3f7; color: var(--ink); }
.btn--ghost { border-color: rgba(255, 255, 255, .55); color: #fff; }
.btn--ghost:hover { background: rgba(255, 255, 255, .12); color: #fff; }
.btn--outline { border-color: var(--accent); color: var(--accent-dark); background: transparent; }
.btn--outline:hover { background: var(--accent-soft); color: var(--accent-dark); }

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

.section { padding-block: clamp(2.25rem, 5vw, 3.75rem); }
.section--tight { padding-block: clamp(1.75rem, 3.5vw, 2.5rem); }
.section--surface { background: var(--surface); border-block: 1px solid var(--line); }

.section__head { max-width: 46rem; margin-bottom: 1.75rem; }
.section__head h2 {
  font-size: clamp(1.4rem, 2.6vw, 1.9rem);
  line-height: 1.25;
  letter-spacing: -.015em;
  margin: 0 0 .5rem;
}
.section__head p { margin: 0; color: var(--ink-soft); }

.eyebrow {
  display: inline-block;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent-dark);
  margin-bottom: .6rem;
}

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

.grid { display: grid; gap: 1rem; }
.grid--3 { grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); }
.grid--2 { grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr)); }

.card {
  display: flex;
  flex-direction: column;
  gap: .5rem;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.4rem;
  box-shadow: var(--shadow);
  text-decoration: none;
  color: inherit;
}
.card h3 { margin: 0; font-size: 1.12rem; line-height: 1.35; }
.card p { margin: 0; color: var(--ink-soft); font-size: .98rem; }
.card__more {
  margin-top: auto;
  padding-top: .5rem;
  font-weight: 600;
  font-size: .95rem;
  color: var(--accent-dark);
}
a.card:hover { border-color: #c9d8d4; }
a.card:hover h3 { color: var(--accent-dark); }

.card__icon {
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 11px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  display: grid;
  place-items: center;
  margin-bottom: .35rem;
}
.card__icon svg { width: 1.35rem; height: 1.35rem; }

/* ---------- Text-Inhalte ---------- */

.prose { max-width: 46rem; }
.prose h2 {
  font-size: clamp(1.3rem, 2.4vw, 1.65rem);
  line-height: 1.3;
  margin: 2.25rem 0 .6rem;
  letter-spacing: -.01em;
}
.prose h3 { font-size: 1.12rem; margin: 1.6rem 0 .4rem; }
.prose p, .prose li { color: var(--ink-soft); }
.prose > p:first-child { margin-top: 0; }
.prose ul, .prose ol { padding-left: 1.15rem; }
.prose li { margin-bottom: .4rem; }
.prose li::marker { color: var(--accent); }

.answer {
  background: var(--accent-soft);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 1.1rem 1.25rem;
  margin: 0 0 1.5rem;
}
.answer p { margin: 0; color: var(--ink); }
.answer strong { color: var(--ink); }

.steps {
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 0 0 1.25rem;
  display: grid;
  gap: .9rem;
}
.steps > li {
  position: relative;
  padding-left: 3rem;
  min-height: 2.1rem;
  color: var(--ink-soft);
}
.steps > li::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  font-weight: 700;
  font-size: .95rem;
  display: grid;
  place-items: center;
}
.steps > li strong { color: var(--ink); display: block; }

.checklist {
  list-style: none;
  padding: 0;
  margin: 0 0 1.25rem;
  display: grid;
  gap: .55rem;
}
.checklist li {
  position: relative;
  padding-left: 1.9rem;
  color: var(--ink-soft);
}
.checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .45em;
  width: 1.05rem;
  height: 1.05rem;
  border-radius: 4px;
  border: 2px solid var(--accent);
  background: #fff;
}

.notice {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  padding: 1rem 1.15rem;
  margin: 1.5rem 0;
  font-size: .95rem;
  color: var(--ink-soft);
}
.notice strong { color: var(--ink); }
.notice--amber { background: var(--amber-soft); border-color: #eadbc3; }
.notice--plain { background: #f1f0ec; }

/* ---------- Inhaltsverzeichnis ---------- */

.toc {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 1rem 1.15rem;
  margin: 0 0 1.75rem;
  font-size: .95rem;
}
.toc p { margin: 0 0 .5rem; font-weight: 700; color: var(--ink); }
.toc ul { margin: 0; padding-left: 1.1rem; columns: 2; column-gap: 1.5rem; }
.toc li { margin-bottom: .3rem; }

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

.faq { display: grid; gap: .6rem; max-width: 46rem; }
.faq details {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0 1.1rem;
}
.faq summary {
  cursor: pointer;
  font-weight: 600;
  padding: .95rem 0;
  list-style: none;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  font-size: 1.3rem;
  line-height: 1;
  color: var(--accent-dark);
  flex: none;
}
.faq details[open] summary::after { content: "–"; }
.faq details > p { margin: 0 0 1rem; color: var(--ink-soft); }

/* ---------- Hinweis Unabhängigkeit ---------- */

.independence {
  display: flex;
  gap: .8rem;
  align-items: flex-start;
  background: var(--amber-soft);
  border: 1px solid #eadbc3;
  border-radius: var(--radius-sm);
  padding: .85rem 1rem;
  font-size: .92rem;
  color: #5c4526;
}
.independence svg { flex: none; width: 1.15rem; height: 1.15rem; margin-top: .15rem; }
.independence p { margin: 0; }

/* ---------- Bild mit Text ---------- */

.split {
  display: grid;
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center;
}
@media (min-width: 48rem) {
  .split { grid-template-columns: 1.1fr .9fr; }
  .split--reverse > figure { order: -1; }
}
.split figure { margin: 0; }
.split figure img {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* ---------- Fußbereich ---------- */

.site-footer {
  background: var(--ink);
  color: #c3d0dc;
  padding-block: 2.5rem 1.5rem;
  font-size: .93rem;
}
.site-footer a { color: #dfe8ef; }
.site-footer a:hover { color: #fff; }
.footer-grid {
  display: grid;
  gap: 1.75rem;
  grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
  margin-bottom: 1.75rem;
}
.site-footer h2 {
  font-size: .8rem;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: #93a7b8;
  margin: 0 0 .6rem;
}
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: .35rem; }
.site-footer p { margin: 0 0 .5rem; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .14);
  padding-top: 1.1rem;
  display: flex;
  flex-wrap: wrap;
  gap: .5rem 1.25rem;
  justify-content: space-between;
  font-size: .86rem;
  color: #a3b5c4;
}

/* ---------- Brotkrumen ---------- */

.breadcrumb {
  font-size: .86rem;
  color: var(--ink-muted);
  padding-block: .9rem 0;
}
.breadcrumb ol { list-style: none; display: flex; flex-wrap: wrap; gap: .4rem; margin: 0; padding: 0; }
.breadcrumb li + li::before { content: "›"; margin-right: .4rem; color: var(--ink-muted); }
.breadcrumb a { color: var(--ink-soft); }

/* ---------- Seitenkopf ---------- */

.page-head {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  padding-block: 1.5rem 2rem;
}
.page-head h1 {
  font-size: clamp(1.6rem, 3.6vw, 2.4rem);
  line-height: 1.2;
  letter-spacing: -.02em;
  margin: .35rem 0 .6rem;
  max-width: 40rem;
}
.page-head p {
  margin: 0;
  max-width: 42rem;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

/* ---------- Quellen ---------- */

.sources { font-size: .93rem; }
.sources ul { padding-left: 1.15rem; }
.sources li { margin-bottom: .4rem; color: var(--ink-soft); }

.meta-line {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem 1rem;
  font-size: .85rem;
  color: var(--ink-muted);
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

/* ---------- Hilfsklassen ---------- */

.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;
}

.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.center { text-align: center; }
.center .section__head { margin-inline: auto; }

@media (max-width: 47.99rem) {
  .hero { background-position: center; }
  .hero::before {
    background: linear-gradient(180deg, rgba(9, 27, 44, .93) 0%, rgba(9, 27, 44, .9) 60%, rgba(9, 27, 44, .8) 100%);
  }
  .toc ul { columns: 1; }
  .header-inner { gap: .5rem; }
  .site-nav { margin-left: 0; width: 100%; }
  .site-nav ul { gap: 0; }
  .site-nav a { padding: .4rem .5rem; font-size: .9rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; }
}