/* ==========================================================================
   www.energiewende.czauderna.de — Designsystem
   Palette:
   --papier   #F5F6F3  kühler Papierton (Hintergrund)
   --nacht    #14212B  Leitstand-Dunkelblau (Header, Footer, Text-Anker)
   --tinte    #1C2830  Fließtext
   --kupfer   #A85B21  Leiter-Kupfer (Akzent, Links, Nodes)
   --kupfer-h #C1701F  Kupfer hell (Hover)
   --volt     #E9C34D  Spannungsgelb (sparsam: aktive Zustände)
   --raster   #D5D9D2  Linien, Rahmen
   ========================================================================== */

:root {
  --papier: #F5F6F3;
  --nacht: #14212B;
  --tinte: #1C2830;
  --kupfer: #A85B21;
  --kupfer-h: #C1701F;
  --volt: #E9C34D;
  --raster: #D5D9D2;
  --mono: "SF Mono", "Cascadia Code", Consolas, "Liberation Mono", Menlo, monospace;
  --grotesk: "Helvetica Neue", Helvetica, Arial, system-ui, sans-serif;
  --serif: Charter, "Bitstream Charter", Georgia, Cambria, "Times New Roman", serif;
  --trasse-x: 56px;
}

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

body {
  margin: 0;
  background: var(--papier);
  color: var(--tinte);
  font-family: var(--serif);
  font-size: 1.075rem;
  line-height: 1.72;
}

/* ---- Sprachumschaltung: html[data-lang] blendet Gegensprache aus ---- */
html[data-lang="de"] [lang="en"] { display: none !important; }
html[data-lang="en"] [lang="de"] { display: none !important; }

::selection { background: var(--volt); color: var(--nacht); }

a { color: var(--kupfer); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--kupfer-h); }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--kupfer);
  outline-offset: 2px;
}

/* ==================== Kopfleiste ==================== */
header.site {
  background: var(--nacht);
  color: #E8ECEA;
  padding: 0.9rem clamp(1rem, 4vw, 3rem);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 3px solid var(--kupfer);
}
.site-id {
  font-family: var(--mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: #9FB0AC;
}
.site-id strong { color: #E8ECEA; font-weight: 600; }

/* Kippschalter DE/EN — Leitungsschutzschalter-Optik */
.lang-switch {
  display: inline-flex;
  border: 1px solid #3A4B56;
  border-radius: 3px;
  overflow: hidden;
  font-family: var(--mono);
  font-size: 0.8rem;
}
.lang-switch button {
  background: transparent;
  border: 0;
  color: #9FB0AC;
  padding: 0.45rem 0.9rem;
  cursor: pointer;
  letter-spacing: 0.1em;
}
.lang-switch button[aria-pressed="true"] {
  background: var(--kupfer);
  color: #FFF6EC;
}

/* ==================== Hero ==================== */
.hero {
  padding: clamp(3rem, 8vw, 6rem) clamp(1rem, 4vw, 3rem) clamp(2rem, 5vw, 4rem);
  max-width: 60rem;
  margin: 0 auto;
}
.eyebrow {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--kupfer);
  margin: 0 0 1.2rem;
}
h1 {
  font-family: var(--grotesk);
  font-weight: 700;
  font-size: clamp(2rem, 5.5vw, 3.6rem);
  line-height: 1.08;
  letter-spacing: -0.015em;
  margin: 0 0 1.4rem;
  color: var(--nacht);
}
.hero .lede {
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  line-height: 1.6;
  max-width: 44rem;
  color: #37454E;
}
.hero-meta {
  margin-top: 2rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  color: #6B7A78;
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

/* ==================== Trassenlinie + Kapitel ==================== */
main {
  max-width: 60rem;
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 3rem) 4rem;
  position: relative;
}
.trasse {
  position: relative;
  padding-left: var(--trasse-x);
}
.trasse::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--raster);
}
section.kapitel {
  position: relative;
  padding: 2.6rem 0 2.2rem;
  border-bottom: 1px solid var(--raster);
}
section.kapitel:last-of-type { border-bottom: 0; }

/* Node = Umspannwerk-Symbol auf der Trasse */
section.kapitel::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--trasse-x) + 8px);
  top: 3.15rem;
  width: 14px;
  height: 14px;
  background: var(--papier);
  border: 2px solid var(--kupfer);
  border-radius: 50%;
  transition: background 0.25s, box-shadow 0.25s;
}
section.kapitel.aktiv::before {
  background: var(--volt);
  box-shadow: 0 0 0 4px rgba(233, 195, 77, 0.25);
}

.kapitel-nr {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--kupfer);
  text-transform: uppercase;
  margin: 0 0 0.5rem;
}
h2 {
  font-family: var(--grotesk);
  font-weight: 700;
  font-size: clamp(1.4rem, 3vw, 1.9rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--nacht);
  margin: 0 0 1.1rem;
}
h3 {
  font-family: var(--grotesk);
  font-size: 1.05rem;
  color: var(--nacht);
  margin: 1.6rem 0 0.5rem;
}
.kapitel p { max-width: 46rem; margin: 0 0 1rem; }
.kapitel ul, .kapitel ol { max-width: 46rem; padding-left: 1.2rem; }
.kapitel li { margin-bottom: 0.5rem; }

/* Zahlen im Leitstand-Stil */
.kennzahl {
  font-family: var(--mono);
  font-size: 0.95em;
  background: #ECEEE9;
  border: 1px solid var(--raster);
  border-radius: 3px;
  padding: 0.05em 0.35em;
  white-space: nowrap;
}
.zahlenblock {
  border-left: 3px solid var(--kupfer);
  background: #EFF1EC;
  padding: 1rem 1.2rem;
  margin: 1.4rem 0;
  max-width: 46rem;
}
.zahlenblock p { margin: 0.3rem 0; font-family: var(--mono); font-size: 0.9rem; line-height: 1.6; }
.zahlenblock .zb-label { font-family: var(--grotesk); font-weight: 600; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--kupfer); }

.quelle { font-size: 0.85em; color: #5C6B69; }
sup a { text-decoration: none; font-family: var(--mono); font-size: 0.75em; }

/* Quellenverzeichnis */
.quellen ol { font-size: 0.92rem; color: #37454E; }

/* ==================== Kommentare ==================== */
.kommentare {
  margin-top: 2rem;
  border-top: 1px dashed var(--raster);
  padding-top: 1.2rem;
  max-width: 46rem;
}
.kommentare summary {
  cursor: pointer;
  font-family: var(--grotesk);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--kupfer);
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.kommentare summary::before { content: "▸"; transition: transform 0.15s; }
.kommentare details[open] summary::before { transform: rotate(90deg); }
.kommentar-liste { margin: 1rem 0; }
.kommentar {
  border: 1px solid var(--raster);
  border-radius: 4px;
  padding: 0.8rem 1rem;
  margin-bottom: 0.7rem;
  background: #FFFFFF;
}
.kommentar .k-meta {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: #6B7A78;
  margin-bottom: 0.35rem;
}
.kommentar .k-text { font-size: 0.95rem; margin: 0; white-space: pre-wrap; }

.kommentar-form { display: grid; gap: 0.6rem; margin-top: 1rem; }
.kommentar-form label {
  font-family: var(--grotesk);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--nacht);
}
.kommentar-form input[type="text"],
.kommentar-form textarea {
  font-family: var(--serif);
  font-size: 0.95rem;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--raster);
  border-radius: 3px;
  background: #FFFFFF;
  width: 100%;
}
.kommentar-form textarea { min-height: 6rem; resize: vertical; }
.kommentar-form .hp { position: absolute; left: -9999px; }
.kommentar-form button {
  justify-self: start;
  font-family: var(--grotesk);
  font-weight: 600;
  font-size: 0.9rem;
  background: var(--kupfer);
  color: #FFF6EC;
  border: 0;
  border-radius: 3px;
  padding: 0.6rem 1.3rem;
  cursor: pointer;
}
.kommentar-form button:hover { background: var(--kupfer-h); }
.form-status { font-family: var(--mono); font-size: 0.8rem; color: #4B6455; }
.form-hinweis { font-size: 0.8rem; color: #6B7A78; margin: 0; }

/* ==================== Mitwirken / Footer ==================== */
.mitwirken {
  background: var(--nacht);
  color: #DCE3E0;
  border-radius: 6px;
  padding: 2rem clamp(1.2rem, 3vw, 2.5rem);
  margin: 3rem 0 0;
}
.mitwirken h2 { color: #FFFFFF; }
.mitwirken .eyebrow { color: var(--volt); }
.mitwirken a { color: var(--volt); }

footer.site {
  background: var(--nacht);
  color: #9FB0AC;
  margin-top: 4rem;
  padding: 2rem clamp(1rem, 4vw, 3rem);
  font-family: var(--mono);
  font-size: 0.78rem;
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
footer.site a { color: #DCE3E0; }

/* ==================== Inhaltsnavigation ==================== */
nav.inhalt {
  font-family: var(--grotesk);
  font-size: 0.9rem;
  border: 1px solid var(--raster);
  border-radius: 6px;
  padding: 1.2rem 1.4rem;
  margin: 0 0 1rem;
  background: #EFF1EC;
}
nav.inhalt strong {
  display: block;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--kupfer);
  margin-bottom: 0.6rem;
}
nav.inhalt ol { margin: 0; padding-left: 1.2rem; columns: 2; column-gap: 2rem; }
nav.inhalt li { margin-bottom: 0.35rem; break-inside: avoid; }
nav.inhalt a { text-decoration: none; color: var(--tinte); }
nav.inhalt a:hover { color: var(--kupfer); }

@media (max-width: 720px) {
  :root { --trasse-x: 34px; }
  .trasse::before { left: 7px; }
  section.kapitel::before { left: calc(-1 * var(--trasse-x) + 1px); }
  nav.inhalt ol { columns: 1; }
  body { font-size: 1rem; }
}