/* ==========================================================
   schaltplaninfo.net — Stylesheet
   Aesthetik: Technisches Referenzwerk
   ========================================================== */

:root {
  /* Farben */
  --ink:         #0e2238;   /* Tintenblau */
  --ink-soft:    #2b3f5c;
  --paper:       #f6f1e6;   /* warmes Papier */
  --paper-warm:  #ede4d1;
  --copper:      #b5651d;   /* Kupfer-Akzent */
  --copper-soft: #d28a45;
  --rule:        #1a2a40;
  --muted:       #6b6b68;
  --grid:        rgba(14, 34, 56, 0.07);

  /* Typografie */
  --font-display: 'Fraunces', 'Cormorant Garamond', Georgia, serif;
  --font-body:    'Newsreader', 'Source Serif 4', 'Times New Roman', serif;
  --font-ui:      'Geist', 'Inter Tight', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', 'IBM Plex Mono', ui-monospace, monospace;

  /* Raster */
  --max: 1180px;
  --gutter: clamp(1.25rem, 3vw, 2.25rem);
}

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

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background:
    linear-gradient(var(--paper), var(--paper)),
    repeating-linear-gradient(0deg, transparent 0 39px, var(--grid) 39px 40px),
    repeating-linear-gradient(90deg, transparent 0 39px, var(--grid) 39px 40px);
  background-blend-mode: multiply;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Text-Auswahl */
::selection { background: var(--ink); color: var(--paper); }

/* ----- Top-Leiste ----- */
.topstrip {
  background: var(--ink);
  color: var(--paper-warm);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.topstrip__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 10px var(--gutter);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.topstrip a { color: var(--copper-soft); text-decoration: none; }
.topstrip a:hover { color: var(--paper); }

/* ----- Kopfbereich / Masthead ----- */
.masthead {
  border-bottom: 2px solid var(--ink);
  background: linear-gradient(180deg, transparent, rgba(14,34,56,0.02));
}
.masthead__inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2.4rem var(--gutter) 1.4rem;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}
.wordmark a {
  color: var(--ink);
  text-decoration: none;
  display: inline-flex;
  flex-direction: column;
  line-height: 1;
}
.wordmark__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  letter-spacing: -0.02em;
  font-style: italic;
}
.wordmark__sub {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--copper);
  margin-top: 0.6rem;
}

nav.primary {
  font-family: var(--font-ui);
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
nav.primary ul {
  display: flex;
  gap: 1.4rem;
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: wrap;
}
nav.primary a {
  color: var(--ink);
  text-decoration: none;
  padding-bottom: 3px;
  border-bottom: 1px solid transparent;
  transition: border-color .18s ease;
}
nav.primary a:hover,
nav.primary a[aria-current="page"] {
  border-bottom-color: var(--copper);
}

/* ----- Hauptbehälter ----- */
main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ----- Hero (Startseite) ----- */
.hero {
  padding: 4rem 0 3rem;
  border-bottom: 1px solid var(--rule);
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 3rem;
  align-items: end;
}
.hero__kicker {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: 1.2rem;
}
.hero h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2.6rem, 6vw, 5rem);
  line-height: 0.98;
  letter-spacing: -0.02em;
  margin: 0 0 1.2rem;
}
.hero h1 em {
  font-style: italic;
  font-weight: 300;
  color: var(--copper);
}
.hero__lede {
  font-size: 1.25rem;
  line-height: 1.55;
  max-width: 46ch;
  color: var(--ink-soft);
}
.hero__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  border-top: 1px solid var(--rule);
  padding-top: 1rem;
}
.hero__meta dl { margin: 0; display: grid; grid-template-columns: auto 1fr; gap: .4rem 1.2rem; }
.hero__meta dt { color: var(--muted); text-transform: uppercase; font-size: 10px; letter-spacing: 0.2em; align-self: center; }
.hero__meta dd { margin: 0; color: var(--ink); }

@media (max-width: 820px) {
  .hero { grid-template-columns: 1fr; gap: 1.5rem; padding-top: 2.5rem; }
}

/* ----- Abschnittsüberschriften ----- */
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 3.5rem;
  padding-bottom: 1.2rem;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 2.2rem;
}
.section-head h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-style: italic;
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  margin: 0;
  letter-spacing: -0.01em;
}
.section-head__index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--copper);
}

/* ----- Einleitungstext ----- */
.prose {
  max-width: 68ch;
}
.prose p {
  margin: 0 0 1.2rem;
}
.prose p.dropcap::first-letter {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 4.2rem;
  line-height: 0.85;
  float: left;
  padding: 0.4rem 0.6rem 0 0;
  color: var(--copper);
}

/* ----- Karten-Raster der Schaltplanarten ----- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 0;
  border-top: 1px solid var(--rule);
  border-left: 1px solid var(--rule);
}
.card {
  border-right: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 1.6rem 1.4rem 1.8rem;
  background: transparent;
  transition: background .25s ease;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  min-height: 200px;
  position: relative;
}
.card:hover { background: rgba(181, 101, 29, 0.07); }
.card__no {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.15em;
  color: var(--copper);
}
.card__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.55rem;
  line-height: 1.1;
  margin: .6rem 0 .6rem;
  letter-spacing: -0.01em;
}
.card__abbr {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.05em;
}
.card__desc {
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--ink-soft);
  margin-top: auto;
  padding-top: 1.2rem;
}
.card__arrow {
  position: absolute;
  top: 1.6rem;
  right: 1.4rem;
  font-family: var(--font-mono);
  color: var(--copper);
  opacity: 0;
  transition: opacity .2s ease, transform .2s ease;
}
.card:hover .card__arrow { opacity: 1; transform: translateX(4px); }

/* ----- Detailseiten-Layout ----- */
.page-head {
  padding: 3rem 0 2rem;
  border-bottom: 1px solid var(--rule);
}
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1.2rem;
}
.breadcrumb a { color: var(--copper); text-decoration: none; }
.breadcrumb a:hover { color: var(--ink); }
.breadcrumb span { margin: 0 .6rem; }

.page-head h1 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2.4rem, 5vw, 4rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 0 0 1rem;
}
.page-head h1 em {
  font-style: italic;
  color: var(--copper);
  font-weight: 300;
}
.page-head__lede {
  font-size: 1.2rem;
  line-height: 1.55;
  color: var(--ink-soft);
  max-width: 60ch;
  margin: 0;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 3.5rem;
  padding: 3rem 0 4rem;
}
.article-layout article { min-width: 0; }
.article-layout article h2 {
  font-family: var(--font-display);
  font-weight: 500;
  font-style: italic;
  font-size: 1.75rem;
  letter-spacing: -0.01em;
  margin: 2.5rem 0 0.8rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--rule);
}
.article-layout article h2:first-of-type { margin-top: 0; padding-top: 0; border-top: 0; }
.article-layout article h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.2rem;
  margin: 1.6rem 0 .6rem;
  letter-spacing: -0.005em;
}
.article-layout article p { margin: 0 0 1.1rem; }
.article-layout article ul,
.article-layout article ol {
  padding-left: 1.2rem;
  margin: 0 0 1.3rem;
}
.article-layout article li { margin-bottom: .45rem; }

/* Eselsbrücke / Tafel */
blockquote.tafel {
  border-left: 3px solid var(--copper);
  padding: 1rem 1.2rem;
  margin: 1.5rem 0;
  background: rgba(181, 101, 29, 0.06);
  font-style: italic;
  color: var(--ink-soft);
  font-size: 1.05rem;
}
blockquote.tafel::before {
  content: "Merksatz";
  display: block;
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 10px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: .4rem;
}

/* Seitenleiste auf Detailseiten */
aside.sidebar {
  font-family: var(--font-ui);
  font-size: 14px;
  line-height: 1.55;
  border-left: 1px solid var(--rule);
  padding-left: 1.5rem;
  align-self: start;
  position: sticky;
  top: 2rem;
}
aside.sidebar h4 {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--copper);
  margin: 0 0 .5rem;
  font-weight: 500;
}
aside.sidebar .data {
  margin: 0 0 1.4rem;
}
aside.sidebar .data dt {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: .2rem;
}
aside.sidebar .data dd {
  margin: 0 0 .9rem;
  color: var(--ink);
}

/* ASCII-Schema-Blöcke */
.diagram {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.45;
  background: #0e2238;
  color: #dfe8f3;
  padding: 1.5rem;
  border-radius: 2px;
  overflow-x: auto;
  margin: 1.5rem 0 1.8rem;
  border-left: 3px solid var(--copper);
  white-space: pre;
}
.diagram .caption {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--copper-soft);
  margin-bottom: 1rem;
  white-space: normal;
}

/* Weiter-Navigation unten */
.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  border-top: 1px solid var(--rule);
  padding-top: 1.5rem;
  margin-top: 2.5rem;
}
.pager a {
  text-decoration: none;
  color: var(--ink);
  padding: 1rem 1.2rem;
  border: 1px solid var(--rule);
  display: block;
  transition: background .2s ease;
}
.pager a:hover { background: rgba(181, 101, 29, 0.07); }
.pager a span {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: .3rem;
}
.pager a strong {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.15rem;
  font-style: italic;
}
.pager .next { text-align: right; }

@media (max-width: 860px) {
  .article-layout { grid-template-columns: 1fr; gap: 2rem; }
  aside.sidebar { border-left: 0; padding-left: 0; border-top: 1px solid var(--rule); padding-top: 1.5rem; position: static; }
}

/* ----- Fußbereich ----- */
footer.site {
  margin-top: 4rem;
  background: var(--ink);
  color: var(--paper-warm);
  padding: 3rem 0 2rem;
}
footer.site .inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--gutter);
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 2.5rem;
}
footer.site h5 {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--copper-soft);
  margin: 0 0 .8rem;
  font-weight: 500;
}
footer.site a { color: var(--paper-warm); text-decoration: none; }
footer.site a:hover { color: var(--copper-soft); }
footer.site ul { list-style: none; padding: 0; margin: 0; font-family: var(--font-ui); font-size: 14px; line-height: 1.9; }
footer.site .brand {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.6rem;
  margin-bottom: .6rem;
}
footer.site .brand + p { font-family: var(--font-ui); font-size: 14px; line-height: 1.6; color: #a9b4c3; max-width: 40ch; }
footer.site .colophon {
  max-width: var(--max);
  margin: 2.5rem auto 0;
  padding: 1.5rem var(--gutter) 0;
  border-top: 1px solid rgba(255,255,255,0.1);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: #8996a8;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
@media (max-width: 760px) {
  footer.site .inner { grid-template-columns: 1fr; }
}

/* Begrüßungs-Animation */
@keyframes riseIn {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}
.hero > * { animation: riseIn .8s ease both; }
.hero > *:nth-child(2) { animation-delay: .12s; }
.page-head > * { animation: riseIn .7s ease both; }
.page-head > *:nth-child(2) { animation-delay: .1s; }
.page-head > *:nth-child(3) { animation-delay: .2s; }