@import url('https://fonts.googleapis.com/css2?family=Zilla+Slab:ital,wght@0,400;0,600;0,700;1,400&family=Manrope:wght@400;500;600;700;800&family=Fragment+Mono:ital@0;1&display=swap');

:root {
  --stollen: #1c130f;
  --stollen-soft: #2e211a;
  --stollen-line: rgba(247,240,222,.16);
  --salzkristall: #f7f0de;
  --salzkristall-deep: #ece0c2;
  --lampenlicht: #e6a84a;
  --lampenlicht-deep: #b17f2e;
  --sole: #3f8a8a;
  --sole-deep: #2c6666;
  --erzader: #9a5030;
  --erzader-deep: #713a22;
  --weiss: #fffdf8;
  --font-display: "Zilla Slab", Georgia, serif;
  --font-body: "Manrope", "Segoe UI", sans-serif;
  --font-data: "Fragment Mono", ui-monospace, monospace;
  --content-max: 76rem;
  --reading-max: 42rem;
  --step-0: clamp(.9rem, .86rem + .18vw, 1rem);
  --step-1: clamp(1.05rem, 1rem + .22vw, 1.18rem);
  --step-2: clamp(1.3rem, 1.14rem + .68vw, 1.75rem);
  --step-3: clamp(1.75rem, 1.4rem + 1.5vw, 2.6rem);
  --step-4: clamp(2.5rem, 1.9rem + 2.6vw, 3.9rem);
  --space-1: .5rem;
  --space-2: 1rem;
  --space-3: 1.6rem;
  --space-4: 2.4rem;
  --space-5: 3.6rem;
  --space-6: 5.5rem;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--stollen);
  background: var(--salzkristall);
  font-family: var(--font-body);
  font-size: var(--step-1);
  line-height: 1.62;
}
img { display: block; max-width: 100%; }
a { color: var(--erzader-deep); }
a:hover { color: var(--erzader); }
:focus-visible { outline: .18rem solid var(--lampenlicht); outline-offset: .18rem; }
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.08;
  color: var(--stollen);
  text-wrap: balance;
}
h1 { margin: 0; font-size: var(--step-4); font-weight: 700; }
h2 { margin: 0 0 .9rem; font-size: var(--step-3); }
h3 { margin: 0 0 .55rem; font-size: var(--step-2); }
p { margin: 0 0 1rem; max-width: 68ch; }
.shell { width: min(calc(100% - 2.4rem), var(--content-max)); margin-inline: auto; }
.skip-link { position: absolute; left: -9999px; top: 0; z-index: 100; padding: .8rem 1rem; background: var(--lampenlicht); color: var(--stollen); }
.skip-link:focus { left: 1rem; top: 1rem; }

/* Header */
.zugang { background: var(--stollen); border-bottom: .2rem solid var(--lampenlicht); position: sticky; top: 0; z-index: 20; }
.zugang-bar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .75rem 1.5rem; min-height: 4.3rem; padding-block: .6rem; }
.zugang-mark { display: inline-flex; align-items: center; gap: .6rem; text-decoration: none; color: var(--salzkristall); }
.zugang-mark svg { flex-shrink: 0; }
.zugang-mark span { display: block; font-family: var(--font-display); font-weight: 700; font-size: 1.12rem; }
.zugang-mark small { display: block; font-family: var(--font-data); font-size: .64rem; letter-spacing: .04em; color: rgba(247,240,222,.6); font-weight: 400; }
.stollennav { display: flex; gap: .1rem; overflow-x: auto; scrollbar-width: thin; }
.stollennav a { display: inline-flex; align-items: center; min-height: 44px; padding: .45rem .75rem; color: rgba(247,240,222,.78); font-weight: 600; font-size: .92rem; white-space: nowrap; text-decoration: none; border-radius: .2rem; }
.stollennav a:hover { color: var(--salzkristall); }
.stollennav a[aria-current="page"] { color: var(--stollen); background: var(--lampenlicht); }

/* Hero: Querschnitt cross-section */
.schacht { background: var(--stollen); color: var(--salzkristall); overflow: hidden; }
.schacht-grid { display: grid; gap: var(--space-4); padding-block: var(--space-5) var(--space-4); }
.schacht-copy { max-width: 40rem; }
.schacht-kicker { display: inline-flex; align-items: center; gap: .5rem; margin-bottom: 1.1rem; padding: .3rem .7rem; background: var(--stollen-soft); border: .1rem solid var(--stollen-line); font-family: var(--font-data); font-size: .72rem; letter-spacing: .05em; text-transform: uppercase; color: var(--lampenlicht); }
.schacht h1 { color: var(--weiss); }
.schacht-lede { color: rgba(247,240,222,.82); font-size: clamp(1.05rem, 1rem + .3vw, 1.2rem); }
.schacht-actions { display: flex; flex-wrap: wrap; gap: .8rem; margin-top: var(--space-3); }

.querschnitt { position: relative; padding: var(--space-3) 0; border-left: .12rem solid var(--stollen-line); margin-left: .9rem; }
.querschnitt-tick { position: relative; display: grid; grid-template-columns: 5.5rem 1fr; align-items: start; gap: 1rem; padding: .85rem 0 .85rem 1.4rem; }
.querschnitt-tick::before { content: ""; position: absolute; left: -.42rem; top: 1.15rem; width: .72rem; height: .72rem; border-radius: 50%; background: var(--lampenlicht); border: .14rem solid var(--stollen); }
.querschnitt-tick[data-zone="surface"]::before { background: var(--sole); }
.querschnitt-tick[data-zone="mine"]::before { background: var(--erzader); }
.querschnitt-depth { font-family: var(--font-data); font-size: .82rem; color: var(--lampenlicht); white-space: nowrap; }
.querschnitt-tick[data-zone="surface"] .querschnitt-depth { color: var(--sole); }
.querschnitt-tick[data-zone="mine"] .querschnitt-depth { color: var(--erzader); }
.querschnitt-label strong { display: block; font-family: var(--font-display); font-size: 1.05rem; color: var(--weiss); }
.querschnitt-label span { display: block; font-size: .88rem; color: rgba(247,240,222,.68); margin-top: .15rem; }

.btn { display: inline-flex; align-items: center; min-height: 44px; padding: .65rem 1.15rem; font-weight: 700; text-decoration: none; border: .14rem solid transparent; }
.btn-primary { background: var(--lampenlicht); color: var(--stollen); }
.btn-primary:hover { background: var(--salzkristall); color: var(--stollen); }
.btn-outline { border-color: rgba(247,240,222,.5); color: var(--salzkristall); }
.btn-outline:hover { border-color: var(--salzkristall); }

/* Content architecture: Stollenweg — a continuous mine-shaft rail running the
   full page, sections ("Etagen" / levels) anchored beside it at a labelled
   depth, replacing the generic alternating-stripe "band" skeleton. */
.stollenweg { padding-block: var(--space-6) var(--space-5); }
.stollenweg-inner { position: relative; padding-left: 2.7rem; }
.stollenweg-inner::before { content: ""; position: absolute; left: .5rem; top: .35rem; bottom: .35rem; width: .12rem; background: var(--stollen-line); }
.etage { position: relative; padding-bottom: var(--space-5); margin-bottom: var(--space-5); border-bottom: .08rem solid rgba(28,19,15,.12); }
.etage:last-child { margin-bottom: 0; padding-bottom: 0; border-bottom: 0; }
.etage::before { content: ""; position: absolute; left: -2.25rem; top: .3rem; width: .85rem; height: .85rem; border-radius: 50%; background: var(--lampenlicht); border: .14rem solid var(--salzkristall); }
.etage-tiefe { display: block; margin-bottom: .5rem; font-family: var(--font-data); font-size: .72rem; letter-spacing: .05em; text-transform: uppercase; color: var(--erzader-deep); }
.etage-head { max-width: 46rem; margin-bottom: var(--space-4); }
.etage--tief { background: var(--stollen); color: var(--salzkristall); padding: var(--space-4); border-radius: .15rem; border-bottom: none; }
.etage--tief::before { background: var(--sole); border-color: var(--stollen); }
.etage--tief .etage-tiefe { color: var(--lampenlicht); }
.etage--tief h2, .etage--tief h3 { color: var(--weiss); }
.etage--tief p { color: rgba(247,240,222,.85); }

/* Single-lede page-intro band used once on detail pages */
.stollenzugang { padding-block: var(--space-5); }
.stollenzugang--tief { background: var(--stollen); color: var(--salzkristall); }
.stollenzugang--tief h1, .stollenzugang--tief h2, .stollenzugang--tief h3 { color: var(--weiss); }
.stollenzugang--tief p { color: rgba(247,240,222,.82); }
.wegweiser { display: inline-block; margin-bottom: .6rem; font-family: var(--font-data); font-size: .74rem; letter-spacing: .05em; text-transform: uppercase; color: var(--lampenlicht); }

.kammer-grid { display: grid; gap: 1.4rem; }
.kammer { background: var(--weiss); border: .12rem solid var(--stollen); padding: 1.3rem; }
.kammer-photo { position: relative; margin: -1.3rem -1.3rem 1rem; min-height: 12rem; overflow: hidden; background: var(--stollen-soft); }
.kammer-photo img { width: 100%; height: 100%; min-height: 12rem; object-fit: cover; }
.kammer-tag { display: inline-block; margin-bottom: .5rem; padding: .2rem .55rem; background: var(--stollen); color: var(--lampenlicht); font-family: var(--font-data); font-size: .68rem; letter-spacing: .04em; text-transform: uppercase; }
.kammer p:last-child { margin-bottom: 0; }
.kammer a { display: inline-flex; min-height: 44px; align-items: center; margin-top: .6rem; font-weight: 700; }

.kennzahlen { display: grid; gap: 0; border-top: .14rem solid var(--stollen); margin: 1.6rem 0; }
.kennzahlen > div { padding: .9rem 0; border-bottom: .1rem solid rgba(28,19,15,.15); }
.etage--tief .kennzahlen, .stollenzugang--tief .kennzahlen { border-top-color: var(--stollen-line); }
.etage--tief .kennzahlen > div, .stollenzugang--tief .kennzahlen > div { border-bottom-color: var(--stollen-line); }
.kennzahlen dt { font-family: var(--font-data); font-size: .72rem; letter-spacing: .04em; text-transform: uppercase; opacity: .7; }
.kennzahlen dd { margin: .25rem 0 0; font-family: var(--font-display); font-size: 1.3rem; font-weight: 700; }

/* Signature tool: Besuchsplaner */
.planer { background: var(--stollen-soft); border: .16rem solid var(--stollen-line); padding: var(--space-4); }
.planer-layout { display: grid; gap: var(--space-3); }
.planer h3 { color: var(--weiss); }
.planer-field { display: grid; gap: .5rem; margin-bottom: 1.1rem; }
.planer-field legend { font-family: var(--font-data); font-size: .74rem; letter-spacing: .04em; text-transform: uppercase; color: var(--lampenlicht); padding: 0; margin-bottom: .4rem; }
.planer-option { display: flex; align-items: center; gap: .6rem; min-height: 44px; padding: .4rem .2rem; color: var(--salzkristall); }
.planer-result { background: var(--stollen); border: .14rem solid var(--lampenlicht); padding: 1.3rem; color: var(--salzkristall); }
.planer-result[data-empty] { opacity: .6; }
.planer-result h4 { margin: 0 0 .5rem; color: var(--lampenlicht); font-family: var(--font-data); font-size: .78rem; letter-spacing: .04em; text-transform: uppercase; }
.planer-result p { color: rgba(247,240,222,.88); margin-bottom: .5rem; }
.planer-result .verdict { font-family: var(--font-display); font-size: 1.4rem; color: var(--weiss); margin-bottom: .4rem; }

/* Detail page layout */
.seam { padding-block: var(--space-5); }
.seam-grid { display: grid; gap: var(--space-4); }
.seam-lede { font-size: 1.15rem; color: var(--erzader-deep); max-width: var(--reading-max); }
.prose { max-width: var(--reading-max); }
.prose > :first-child { margin-top: 0; }
.aside-card { background: var(--salzkristall-deep); border-left: .3rem solid var(--erzader); padding: 1.2rem; }
.aside-card h4 { margin: 0 0 .5rem; font-size: 1.1rem; }
.timeline { list-style: none; margin: 0; padding: 0; border-left: .18rem solid var(--stollen); }
.timeline li { position: relative; padding: 0 0 1.6rem 1.5rem; }
.timeline li::before { content: ""; position: absolute; left: -.5rem; top: .3rem; width: .8rem; height: .8rem; border-radius: 50%; background: var(--erzader); border: .14rem solid var(--weiss); }
.timeline strong { display: block; font-family: var(--font-data); font-size: .82rem; color: var(--erzader-deep); }

/* Footer: Tiefe */
.tiefe { background: var(--stollen); color: rgba(247,240,222,.82); border-top: .2rem solid var(--lampenlicht); }
.tiefe-grid { display: grid; gap: var(--space-3); padding-block: var(--space-4); }
.tiefe h4 { color: var(--salzkristall); font-size: 1rem; margin-bottom: .6rem; }
.tiefe a { color: rgba(247,240,222,.82); }
.tiefe nav { display: flex; flex-wrap: wrap; gap: .3rem 1rem; }
.tiefe small { display: block; max-width: 60ch; margin-top: 1rem; color: rgba(247,240,222,.55); }

.feature-photo { margin: var(--space-4) 0 0; border: .14rem solid var(--stollen); }
.feature-photo img { width: 100%; height: 22rem; object-fit: cover; }
.feature-photo figcaption { padding: .6rem .9rem; background: var(--stollen); color: rgba(247,240,222,.82); font-family: var(--font-data); font-size: .74rem; }

.legal-shell { padding-block: var(--space-5); max-width: var(--reading-max); margin-inline: auto; padding-inline: 1.2rem; }
.legal-shell h2 { margin-top: var(--space-4); }

@media (min-width: 46rem) {
  .kammer-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .kennzahlen { grid-template-columns: repeat(3, 1fr); }
  .kennzahlen > div:nth-child(3n+1), .kennzahlen > div:nth-child(3n+2) { border-right: .1rem solid rgba(28,19,15,.15); padding-right: 1rem; }
  .etage--tief .kennzahlen > div:nth-child(3n+1), .etage--tief .kennzahlen > div:nth-child(3n+2),
  .stollenzugang--tief .kennzahlen > div:nth-child(3n+1), .stollenzugang--tief .kennzahlen > div:nth-child(3n+2) { border-right-color: var(--stollen-line); }
  .seam-grid { grid-template-columns: minmax(0,1fr) minmax(18rem, .7fr); }
  .tiefe-grid { grid-template-columns: 1.4fr 1fr 1fr; }
  .stollenweg-inner { padding-left: 3.4rem; }
  .etage::before { left: -2.75rem; }
}
@media (min-width: 64rem) {
  .schacht-grid { grid-template-columns: minmax(0,1fr) minmax(22rem, .85fr); align-items: center; }
  .kammer-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
  .planer-layout { grid-template-columns: 1fr 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}