/* ============================================================
   Zwischen Fortschritt und Natur — Gestaltung
   Palette: exakt vorgegeben, keine grünen Öko-Klischees.
   ============================================================ */

:root {
  --bg: #F1F0E8;
  --text: #182923;
  --bg-2: #D7E1D6;
  --accent: #D9683B;
  --text-2: #64736B;
  --line: #D1D4CB;

  --accent-soft: rgba(217, 104, 59, 0.16);
  --accent-text: #A8481C; /* darker accent for small text: 5.1:1 on --bg (WCAG AA) */
  --text-faint: rgba(24, 41, 35, 0.34);
  --panel: rgba(255, 255, 255, 0.42);

  --font-display: "Space Grotesk", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-body: "Inter", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --maxw: 1180px;
  --measure: 66ch;
  --gap: clamp(1.25rem, 3vw, 2.75rem);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 96px 96px;
  background-attachment: fixed;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 0;
}

p { margin: 0 0 1.05em; }
p:last-child { margin-bottom: 0; }

a { color: var(--text); text-decoration-color: var(--accent); text-underline-offset: 3px; }
a:hover { color: var(--accent-text); }

.mono { font-family: var(--font-mono); font-size: 0.86em; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 50;
  background: var(--text); color: var(--bg); padding: 0.6rem 1rem;
  font-family: var(--font-mono); font-size: 0.8rem;
}
.skip-link:focus { left: 0; color: var(--bg); }

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

section[id] { scroll-margin-top: 5.5rem; }

.site-header {
  position: sticky; top: 0; z-index: 20;
  background: rgba(241, 240, 232, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(6px);
}

.header-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0.7rem clamp(1rem, 4vw, 2.5rem);
  display: flex; align-items: center; gap: 1.5rem; flex-wrap: wrap;
}

.brand {
  display: inline-flex; align-items: center; gap: 0.6rem;
  font-family: var(--font-display); font-weight: 700; font-size: 0.95rem;
  text-transform: uppercase; letter-spacing: 0.08em; text-decoration: none;
}

.brand-mark {
  width: 14px; height: 14px; border: 2px solid var(--accent); border-radius: 50%;
  position: relative;
}
.brand-mark::after {
  content: ""; position: absolute; inset: 3px; background: var(--accent); border-radius: 50%;
}

.top-nav { display: flex; flex-wrap: wrap; gap: 0.15rem; margin-left: auto; }

.top-nav a {
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.04em;
  text-decoration: none; color: var(--text-2);
  padding: 0.42rem 0.6rem; border: 1px solid transparent;
}
.top-nav a:hover { color: var(--text); border-color: var(--line); background: var(--panel); }
.top-nav a.is-current { color: var(--accent-text); border-color: var(--accent); }

/* ---------------- Layout ---------------- */

main { display: block; }

.hero, .chapter, .open-questions, .quellen {
  max-width: var(--maxw); margin: 0 auto;
  padding: clamp(3rem, 7vw, 6rem) clamp(1rem, 4vw, 2.5rem);
}

.chapter.alt { background: var(--bg-2); max-width: none; }
.chapter.alt > .chapter-head, .chapter.alt > .chapter-body {
  max-width: var(--maxw); margin-left: auto; margin-right: auto;
  padding-left: clamp(1rem, 4vw, 2.5rem); padding-right: clamp(1rem, 4vw, 2.5rem);
}

.divider { display: block; width: 100%; height: 1px; background: var(--line); border: 0; margin: 0; }

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

.hero-grid {
  display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: var(--gap); align-items: center;
}

.eyebrow, .chapter-index, .panel-title, .path-label {
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--text-2); margin: 0 0 0.9rem;
}
.chapter-index { color: var(--accent-text); }

.hero h1 {
  font-size: clamp(2.4rem, 6.4vw, 4.6rem);
  text-transform: uppercase; letter-spacing: -0.02em; margin-bottom: 1rem;
  overflow-wrap: break-word;
}

.hero-cta { margin: 1.4rem 0 0; }
.hero-cta a {
  display: inline-block; font-family: var(--font-mono); font-size: 0.8rem;
  letter-spacing: 0.06em; text-decoration: none; color: var(--text);
  border: 1px solid var(--text); padding: 0.6rem 1rem;
}
.hero-cta a:hover { background: var(--text); color: var(--bg); }
.hero-cta a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

.hero-readout {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.75rem;
  margin: 1.5rem 0 0; max-width: 480px;
}
.readout-cell {
  border: 1px solid var(--line); background: var(--bg);
  padding: 0.7rem 0.9rem; display: flex; flex-direction: column; gap: 0.3rem;
}
.readout-label {
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--text-2);
}
.readout-value { font-family: var(--font-display); font-weight: 700; font-size: 1.5rem; color: var(--accent-text); }
.readout-note {
  grid-column: 1 / -1; font-family: var(--font-mono); font-size: 0.74rem;
  line-height: 1.55; color: var(--text); margin: 0.55rem 0 0;
}

.core-question { color: var(--accent-text); }

.lede {
  font-family: var(--font-display); font-size: clamp(1.15rem, 2.4vw, 1.5rem);
  color: var(--accent-text); margin-bottom: 1.2rem;
}

.hero-intro { max-width: var(--measure); color: var(--text); }
.hero-method { max-width: var(--measure); color: var(--text-2); font-size: 0.95rem; }

.hero-meta {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem; margin: 1.6rem 0 0; padding: 0;
}
.hero-meta > div { border-top: 1px solid var(--accent); padding-top: 0.55rem; }
.hero-meta dt {
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--text-2);
}
.hero-meta dd { margin: 0.2rem 0 0; font-size: 0.92rem; }

.hero-figure { min-width: 0; }
.hero-figure svg { width: 100%; height: auto; display: block; }

/* ---------------- Kapitel ---------------- */

.chapter-head { max-width: var(--measure); margin-bottom: 1.8rem; }
.chapter-head h2 { font-size: clamp(1.6rem, 3.4vw, 2.5rem); }

.chapter-body {
  display: grid; grid-template-columns: minmax(0, 1fr); gap: var(--gap);
}
.chapter-body > * { min-width: 0; }

.prose { max-width: var(--measure); }
.prose h3 { font-size: 1.28rem; margin: 2rem 0 0.9rem; }
.prose h4 { font-size: 1rem; margin-bottom: 0.25rem; }

.section-intro { color: var(--text-2); max-width: var(--measure); margin-bottom: 1.4rem; }

.callout {
  border-left: 3px solid var(--accent);
  padding: 0.2rem 0 0.2rem 1.1rem; margin: 1.6rem 0;
  font-family: var(--font-display); font-size: 1.12rem; color: var(--text);
}

.note {
  font-size: 0.84rem; color: var(--text-2); border-top: 1px dashed var(--line);
  padding-top: 0.7rem; margin-top: 1rem;
}

/* ---------------- Kennzeichnungen ---------------- */

.tag {
  display: inline-block; vertical-align: middle;
  font-family: var(--font-mono); font-size: 0.62rem; letter-spacing: 0.14em;
  text-transform: uppercase; padding: 0.16rem 0.42rem; margin-right: 0.55rem;
  border: 1px solid var(--line); color: var(--text-2); background: var(--panel);
  border-radius: 2px;
}
.tag-fakt { border-color: var(--text-2); color: var(--text); }
.tag-analyse { border-color: var(--accent-text); color: var(--accent-text); }
.tag-offen { border-style: dashed; border-color: var(--accent-text); color: var(--accent-text); }

/* ---------------- Messwerte ---------------- */

.gauge-panel {
  border: 1px solid var(--line); background: var(--panel);
  padding: 1.25rem 1.35rem; max-width: 520px;
}

.gauges { display: grid; gap: 0.9rem; }

.gauge { display: grid; grid-template-columns: 4.5rem 5rem 1fr; align-items: center; gap: 0.7rem; }
.gauge-label { font-family: var(--font-mono); font-size: 0.75rem; letter-spacing: 0.12em; color: var(--text-2); }
.gauge-value { font-family: var(--font-display); font-size: 1.35rem; color: var(--text); }
.gauge-bar {
  display: block; height: 10px; border: 1px solid var(--line); background: var(--bg);
  position: relative;
}
.gauge-bar::after {
  content: ""; position: absolute; inset: 0 auto 0 0; width: calc(var(--fill, 0) * 100%);
  background: repeating-linear-gradient(90deg, var(--accent) 0 4px, transparent 4px 7px);
}

/* ---------------- Abschlussfragen ---------------- */

.final-questions { max-width: 820px; margin: 3.5rem auto 1rem; padding: 0 1.25rem; }
.final-questions .fq-kicker {
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--text-2); margin-bottom: 2.2rem;
}
.final-questions blockquote {
  border: 0; margin: 0 0 3rem; padding: 0;
}
.final-questions blockquote p {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(1.35rem, 3vw, 2rem); line-height: 1.35;
  color: var(--text); margin: 0;
}
.final-questions blockquote footer {
  font-family: var(--font-mono); font-size: 0.72rem; color: var(--text-2);
  margin-top: 0.7rem;
}

/* ---------------- Diagramme ---------------- */

.diagram { margin: 0; }
.diagram svg { width: 100%; height: auto; display: block; }

figcaption {
  font-size: 0.8rem; color: var(--text-2); margin-top: 0.7rem;
  border-top: 1px solid var(--line); padding-top: 0.6rem;
}

.node > circle { fill: var(--bg); stroke: var(--text); stroke-width: 1.4; }
.node.accent > circle { stroke: var(--accent); stroke-width: 2; }
.node.both > circle { stroke: var(--text-2); stroke-dasharray: 5 4; }

.n-title { font-family: var(--font-display); font-size: 15px; fill: var(--text); text-anchor: middle; }
.n-sub { font-family: var(--font-mono); font-size: 11px; fill: var(--text-2); text-anchor: middle; }

.edge { fill: none; stroke: var(--text); stroke-width: 1.6; }
.edge.accent { stroke: var(--accent); stroke-width: 2.2; }
.edge.both, .edge.alt { stroke: var(--text); stroke-width: 1.6; }
.edge.both { stroke: var(--text-2); stroke-width: 1.6; stroke-dasharray: 7 5; }
.label-bg { fill: var(--bg); opacity: 0.9; }
.edge.dashed { stroke: var(--text-2); stroke-dasharray: 5 5; stroke-width: 1.2; }
.edge.muted { stroke: var(--text-faint); }
.edge-label, .path-label { font-family: var(--font-mono); font-size: 11.5px; fill: var(--text-2); text-anchor: middle; }
.path-label { fill: var(--accent-text); text-anchor: start; letter-spacing: 0.1em; }
.path-label.center { text-anchor: middle; }

.stage > rect { fill: var(--bg); stroke: var(--text); stroke-width: 1.4; }
.s-title { font-family: var(--font-display); font-size: 14px; fill: var(--text); text-anchor: middle; }
.s-sub { font-family: var(--font-mono); font-size: 10.5px; fill: var(--text-2); text-anchor: middle; }

.branch > rect { fill: var(--bg); stroke: var(--text-2); stroke-width: 1.2; }
.b-title { font-family: var(--font-display); font-size: 13px; fill: var(--text); text-anchor: middle; }
.b-sub { font-family: var(--font-mono); font-size: 10.5px; fill: var(--text-2); text-anchor: middle; }

.col-head > rect { fill: var(--text); stroke: var(--text); }
.c-head { font-family: var(--font-display); font-size: 17px; fill: var(--bg); text-anchor: middle; letter-spacing: 0.08em; }
.col-item > rect { fill: var(--bg); stroke: var(--line); stroke-width: 1.2; }
.col-item.warn > rect { stroke: var(--accent); }
.c-title { font-family: var(--font-display); font-size: 14px; fill: var(--text); }
.c-sub { font-family: var(--font-mono); font-size: 10.5px; fill: var(--text-2); }

.q-core > circle { fill: var(--bg-2); stroke: var(--accent); stroke-width: 2.4; }
.q-text { font-family: var(--font-display); font-size: 14px; fill: var(--text); text-anchor: start; }
.q-no { font-family: var(--font-mono); font-size: 11px; fill: var(--accent-text); text-anchor: middle; }
.q-item > rect { fill: var(--bg); stroke: var(--text-2); stroke-width: 1.2; stroke-dasharray: 6 4; }
.q-hint { font-family: var(--font-mono); font-size: 10.5px; fill: var(--text-2); text-anchor: start; }

/* ---------------- Listen ---------------- */

.lifecycle-list, .measure-list { list-style: none; margin: 1.4rem 0; padding: 0; display: grid; gap: 0.9rem; }

.lifecycle-list > li, .measure-list > li {
  display: grid; grid-template-columns: 2.4rem 1fr; gap: 0.9rem;
  border-top: 1px solid var(--line); padding-top: 0.8rem;
}

.step-no {
  font-family: var(--font-mono); font-size: 0.8rem; color: var(--accent-text);
  border: 1px solid var(--accent); width: 2rem; height: 2rem;
  display: grid; place-items: center; border-radius: 50%;
}

.lifecycle-list p, .measure-list p { font-size: 0.94rem; color: var(--text-2); margin: 0; }

/* ---------------- Ebenen-Tabelle ---------------- */

.frame-panel { border: 1px solid var(--line); background: var(--panel); padding: 1.25rem 1.35rem; }

.frame-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.frame-table th, .frame-table td { text-align: left; padding: 0.55rem 0.6rem; border-bottom: 1px solid var(--line); }
.frame-table thead th {
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--text-2);
}
.frame-table tbody th { font-family: var(--font-display); font-weight: 600; color: var(--accent-text); }
.frame-table tbody tr:last-child th, .frame-table tbody tr:last-child td { border-bottom: 0; }

/* ---------------- Offene Fragen ---------------- */

.open-questions { border-top: 1px solid var(--line); }

.q-list { list-style: none; margin: 1.6rem 0; padding: 0; display: grid; gap: 1rem; }
.q-list > li { border-left: 2px solid var(--accent); padding-left: 1rem; }
.q-list p { margin: 0; }
.q-list .q-no { display: block; margin-bottom: 0.3rem; text-align: left; }
.q-list .q-text { font-family: var(--font-display); font-size: 1.05rem; text-align: left; }

.open-end {
  margin-top: 2rem; padding: 1.2rem 1.4rem; border: 1px dashed var(--accent);
  font-family: var(--font-display); font-size: 1.1rem; max-width: var(--measure);
}

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

.quellen { border-top: 1px solid var(--line); }

.source-list { list-style: none; margin: 1.6rem 0 0; padding: 0; display: grid; gap: 1.1rem; }
.source-list > li {
  display: grid; grid-template-columns: 3rem 1fr; gap: 1rem;
  border-top: 1px solid var(--line); padding-top: 1rem;
}
.src-num { font-family: var(--font-mono); font-size: 0.85rem; color: var(--accent-text); }
.src-title { font-family: var(--font-display); font-size: 1.02rem; margin: 0 0 0.35rem; }
.src-year { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-2); }
.src-note { font-size: 0.92rem; color: var(--text); margin: 0 0 0.4rem; max-width: var(--measure); }
.src-ref, .src-hint { font-family: var(--font-mono); font-size: 0.76rem; color: var(--text-2); margin: 0 0 0.35rem; }
.src-link {
  display: inline-block; font-family: var(--font-mono); font-size: 0.8rem;
  color: var(--accent-text); border: 1px solid var(--accent); padding: 0.3rem 0.55rem;
  text-decoration: none; word-break: break-all;
}
.src-link:hover { background: var(--accent); color: var(--bg); }
.src-meta { margin-top: 1.6rem; font-size: 0.85rem; color: var(--text-2); }

/* ---------------- Footer ---------------- */

.site-footer { border-top: 1px solid var(--line); background: var(--bg-2); margin-top: 2rem; }
.footer-grid {
  max-width: var(--maxw); margin: 0 auto; padding: 2.5rem clamp(1rem, 4vw, 2.5rem);
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.5rem;
  font-size: 0.88rem; color: var(--text);
}
.footer-title {
  font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--text-2); margin-bottom: 0.6rem;
}
.footer-note {
  max-width: var(--maxw); margin: 0 auto; padding: 0 clamp(1rem, 4vw, 2.5rem) 2.5rem;
  font-size: 0.8rem; color: var(--text-2);
}

/* ---------------- Einblendungen (nur mit JS aktiv) ---------------- */

.js-reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s ease; }
.js-reveal.is-visible { opacity: 1; transform: none; }

/* ---------------- Responsive ---------------- */

@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-figure { order: -1; max-width: 460px; }
  .chapter-body { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  body { font-size: 16px; background-size: 64px 64px; }
  .header-inner { align-items: flex-start; }
  .top-nav { margin-left: 0; width: 100%; }
  .gauge { grid-template-columns: 3.6rem 4.4rem 1fr; }
  .gauge-value { font-size: 1.15rem; }
  .source-list > li, .lifecycle-list > li, .measure-list > li { grid-template-columns: 1fr; gap: 0.5rem; }
  .frame-table { font-size: 0.84rem; }
  .frame-table th, .frame-table td { padding: 0.45rem 0.35rem; }
}

@media (max-width: 520px) {
  .hero h1 { font-size: 1.7rem; letter-spacing: -0.01em; word-spacing: 0.1em; }
  .hero-meta { grid-template-columns: 1fr; }
  .diagram { overflow-x: auto; }
  .diagram svg { min-width: 620px; }
  .frame-panel { overflow-x: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .js-reveal { opacity: 1; transform: none; }
}

@media print {
  .site-header, .top-nav, .skip-link { display: none; }
  body { background: #fff; color: #000; }
}