/* =================================================================
   STRUKTURLABS — Website
   Baut auf tokens.css auf. Editorial, strukturiert, warm:
   Haarlinien statt Boxen, Mono-„Laborschrift“, Serif-Headlines.
   ================================================================= */

:root {
  /* Website-Erweiterung: Sekundärtext auf dunklem Grund.
     --fg-3 erreicht dort nur 4,47:1 — dieser Ton liegt bei 6,4:1. */
  --fg-on-ink-2: #a89e8e;
  --container: 1160px;
  --gutter: 40px;
  --header-h: 72px;

  /* Semantische Akzente — kippen im dunklen Schema */
  --accent-text: var(--clay-deep);   /* kleine Clay-Texte, Links, Nummern */
  --accent-strong: var(--clay);      /* große Akzente: kursive Headline, Wortmarke */
  --header-bg: rgba(244, 238, 227, 0.86);

  /* Strata-Marke: vier Schichten */
  --mark-1: var(--clay);
  --mark-2: var(--ink);
  --mark-3: var(--ochre);
  --mark-4: var(--umber);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --accent-text: #e8906b;
    --accent-strong: var(--clay-bright);
    --header-bg: rgba(27, 23, 18, 0.86);
    --mark-1: var(--clay-bright);
  }
}
:root[data-theme="dark"] {
  --accent-text: #e8906b;
  --accent-strong: var(--clay-bright);
  --header-bg: rgba(27, 23, 18, 0.86);
  --mark-1: var(--clay-bright);
}

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

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg-page);
  color: var(--text-1);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main { flex: 1 0 auto; }
img, svg { display: block; max-width: 100%; }
a { color: inherit; }
p { margin: 0; }
::selection { background: var(--clay-tint); }

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

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-inline: var(--gutter);
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: 16px; top: -48px;
  z-index: 100;
  background: var(--ink-bg);
  color: var(--fg-on-ink);
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  text-decoration: none;
  transition: top var(--dur-fast) var(--ease-out);
}
.skip-link:focus { top: 12px; }

.icon {
  width: 20px; height: 20px;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.75;
  stroke-linecap: round;
  stroke-linejoin: round;
}

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

.display {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(44px, 6.2vw, 82px);
  line-height: 1.0;
  letter-spacing: -0.03em;
  color: var(--ink);
  margin: 0;
}

.h3 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-xl);
  line-height: var(--leading-snug);
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 0;
}

.display em, .h3 em {
  font-style: italic;
  color: var(--accent-strong);
}

.lead {
  font-size: 19px;
  line-height: 1.6;
  color: var(--fg-2);
  max-width: 46ch;
}

/* Mono-Mikrolabel — die „Laborschrift“ */
.label {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: var(--text-xs);
  line-height: 1.4;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--fg-2);
}

.meta {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--fg-2);
}

/* ---------- Abschnittsmarker: § 01 / Apps ---------- */

.marker {
  display: flex;
  align-items: baseline;
  gap: 16px;
  border-top: 1px solid var(--ink);
  padding-top: 12px;
  margin-bottom: 40px;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.4;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
}
.marker__num { color: var(--accent-text); }
.marker h2 { margin: 0; font: inherit; letter-spacing: inherit; }
.marker__fig { margin-left: auto; color: var(--fg-3); }

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 15.5px;
  line-height: 1.2;
  letter-spacing: -0.005em;
  padding: 13px 22px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--dur-base) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
}
.btn:active { transform: scale(0.97); }

.btn--primary { background: var(--clay); color: #fff; }
.btn--primary:hover { background: var(--clay-bright); }
.btn--primary:active { background: var(--clay-deep); }

.arr {
  font-family: var(--font-mono);
  font-weight: 500;
  display: inline-block;
  transition: transform var(--dur-base) var(--ease-out);
}
a:hover .arr { transform: translateX(3px); }

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid transparent;
  transition: background-color var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out);
}
.site-header.is-scrolled {
  background: var(--header-bg);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-bottom-color: var(--line);
}

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  text-decoration: none;
  color: var(--ink);
}
.mark { width: 24px; height: 24px; flex: none; }
.mark .m1 { fill: var(--mark-1); }
.mark .m2 { fill: var(--mark-2); }
.mark .m3 { fill: var(--mark-3); }
.mark .m4 { fill: var(--mark-4); }
.wordmark {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: -0.03em;
  white-space: nowrap;
}
.wordmark span { color: var(--accent-strong); }

.header-actions { display: flex; align-items: center; gap: 14px; }

/* Sprachumschalter „DE · EN“ */
.lang {
  display: flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.06em;
  color: var(--fg-3);
}
.lang a {
  padding: 8px 5px;
  color: var(--fg-2);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out);
}
.lang a:hover { color: var(--ink); }
.lang a[aria-current="true"] { color: var(--accent-text); font-weight: 700; }
.lang-hint { font-family: var(--font-mono); font-size: 11px; color: var(--fg-on-ink-2); }

.theme-toggle {
  width: 38px; height: 38px;
  flex: none;
  display: inline-grid;
  place-items: center;
  padding: 0;
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background-color var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.theme-toggle:hover { background: var(--clay-tint-2); }
.theme-toggle:active { transform: scale(0.94); }
.theme-toggle[hidden] { display: none; }
.theme-toggle .icon { width: 18px; height: 18px; }
.theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

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

.hero { padding: 88px 0 96px; }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 64px;
  align-items: center;
}

.hero .meta { margin-bottom: 24px; }

/* Die Strata-Marke als Abbildung auf dem Haarlinien-Raster */
.strata {
  list-style: none;
  margin: 0;
  padding: 44px 36px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  background-color: var(--surface);
  background-image: linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: calc(100% / 6) 100%;
  background-position: -1px 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.strata li { position: relative; height: 38px; }
.strata__bar {
  position: absolute;
  top: 0; bottom: 0;
  left: var(--x);
  width: var(--w);
  background: var(--c);
  border-radius: 4px;
  transform-origin: left center;
  animation: bar-in var(--dur-slow) var(--ease-out) both;
  animation-delay: calc(var(--i) * 80ms + 120ms);
}

@keyframes bar-in {
  from { transform: scaleX(0); opacity: 0; }
  to   { transform: scaleX(1); opacity: 1; }
}

/* ---------- Apps ---------- */

.section { padding: 88px 0; }
.section--surface {
  background: var(--surface);
  border-top: 1px solid var(--line);
}

.app-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.app {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 32px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xs);
}
.app__logo {
  width: 64px; height: 64px;
  border-radius: 14px;
}
.app p { font-size: 16.5px; line-height: 1.6; color: var(--fg-2); max-width: 44ch; }
.app__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 6px;
}
.app .meta { margin-top: auto; padding-top: 6px; }

/* GitHub-Link je App — solange es noch keinen gibt: ausgegraut, „Coming soon“ */
.gh {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px 6px 10px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.4;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  white-space: nowrap;
  transition: background-color var(--dur-fast) var(--ease-out);
}
.gh__icon { width: 16px; height: 16px; flex: none; fill: currentColor; }
a.gh:hover { background: var(--clay-tint-2); }
.gh--soon { color: var(--fg-3); border-style: dashed; }
.gh--soon .gh__icon { opacity: 0.7; }

/* ---------- Platzhalter (vor Livegang ersetzen!) ---------- */

.ph {
  background: var(--ochre-tint);
  color: var(--ink);
  border-bottom: 1px dashed var(--ochre-deep);
  padding: 0 3px;
  border-radius: 2px;
}

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

.site-footer {
  background: var(--ink-bg);
  color: var(--fg-on-ink);
  border-top: 1px solid var(--line);
  --mark-1: var(--clay-bright);
  --mark-2: var(--fg-on-ink);
  --mark-3: var(--ochre);
  --mark-4: #8a6244;
}
.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 40px;
  padding-top: 56px;
  padding-bottom: 40px;
}
.site-footer .brand { color: var(--fg-on-ink); }
.site-footer .wordmark span { color: var(--clay-bright); }
.footer-address {
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.8;
  letter-spacing: 0.04em;
  color: var(--fg-on-ink-2);
  margin-top: 18px;
}
.footer-col h2 {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: var(--text-2xs);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--fg-on-ink-2);
  margin: 0 0 16px;
}
.footer-col ul {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col a {
  font-size: 15px;
  color: var(--fg-on-ink);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out);
}
.footer-col a:hover { color: var(--clay-bright); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px 24px;
  padding-top: 20px;
  padding-bottom: 36px;
  border-top: 1px solid var(--line-on-ink);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--fg-on-ink-2);
}
.footer-bottom a { color: inherit; text-decoration: none; }
.footer-bottom a:hover { color: var(--fg-on-ink); }

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

.page-head { padding: 72px 0 56px; }
.page-head .display { font-size: clamp(44px, 5.8vw, 76px); margin-bottom: 24px; }

/* ---------- Rechtliches ---------- */

.legal {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 64px;
  padding-bottom: 96px;
}
.legal-toc {
  align-self: start;
  position: sticky;
  top: calc(var(--header-h) + 24px);
}
.legal-toc .label { display: block; margin-bottom: 14px; }
.legal-toc ol { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.legal-toc a {
  display: flex;
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.4;
  color: var(--fg-2);
  text-decoration: none;
}
.legal-toc a:hover { color: var(--accent-text); }
.legal-toc a span { font-family: var(--font-mono); font-size: 12px; color: var(--accent-text); padding-top: 1px; }

.prose { max-width: 68ch; color: var(--fg-2); }
.prose section { padding-top: 8px; margin-bottom: 48px; }
.prose h2 {
  display: flex;
  align-items: baseline;
  gap: 14px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--text-xl);
  line-height: var(--leading-snug);
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 0 0 16px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}
.prose h2 .n { font-family: var(--font-mono); font-size: 13px; font-weight: 400; letter-spacing: 0.06em; color: var(--accent-text); }
.prose h3 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 16.5px;
  color: var(--ink);
  margin: 24px 0 8px;
}
.prose p, .prose ul, .prose address { margin: 0 0 14px; }
.prose ul { padding-left: 20px; }
.prose li { margin-bottom: 6px; }
.prose li::marker { color: var(--fg-3); }
.prose address { font-style: normal; color: var(--ink); line-height: 1.7; }
.prose strong { color: var(--ink); font-weight: 600; }
.prose a { color: var(--accent-text); font-weight: 600; text-underline-offset: 3px; text-decoration-thickness: 1px; }

.dl {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  margin: 0 0 14px;
  border-top: 1px solid var(--line);
}
.dl dt, .dl dd { margin: 0; padding: 10px 0; border-bottom: 1px solid var(--line); }
.dl dt { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg-2); padding-top: 13px; }
.dl dd { color: var(--ink); overflow-wrap: anywhere; }

.summary-box, .callout {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 22px 24px;
  margin: 0 0 40px;
}
.summary-box .label, .callout .label { display: block; margin-bottom: 12px; }
.summary-box ul { list-style: none; padding: 0; margin: 0; }
.summary-box li {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 12px;
  margin-bottom: 10px;
  color: var(--ink);
}
.summary-box li:last-child { margin-bottom: 0; }
.summary-box .icon { width: 17px; height: 17px; color: var(--success); margin-top: 4px; }
.callout { background: var(--clay-tint-2); border-color: var(--clay-tint); margin: 20px 0; }
.callout p:last-child { margin-bottom: 0; }
.callout strong { color: var(--ink); }

.stand { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.08em; color: var(--fg-2); }

/* ---------- Einblenden beim Laden ---------- */

.reveal { animation: reveal var(--dur-slow) var(--ease-out) both; }
.reveal--2 { animation-delay: 80ms; }
.reveal--3 { animation-delay: 160ms; }
@keyframes reveal {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: none; }
}

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

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

@media (max-width: 960px) {
  .hero-grid, .legal { grid-template-columns: minmax(0, 1fr); }
  .hero-grid { gap: 48px; }
  .legal { gap: 32px; }
  .legal-toc { position: static; }
}

@media (max-width: 760px) {
  :root { --gutter: 20px; --header-h: 64px; }
  .hero { padding: 48px 0 64px; }
  .page-head { padding: 48px 0 40px; }
  .section { padding: 64px 0; }
  .app-grid { grid-template-columns: minmax(0, 1fr); }
  .app { padding: 26px; }
  .strata { padding: 32px 24px; gap: 11px; }
  .strata li { height: 30px; }
  .marker__fig { display: none; }
  .footer-grid { grid-template-columns: minmax(0, 1fr); }
  .dl { grid-template-columns: minmax(0, 1fr); }
  .dl dt { border-bottom: 0; padding-bottom: 0; }
}

@media (max-width: 420px) {
  .wordmark { font-size: 17px; }
  .theme-toggle { width: 34px; height: 34px; }
}