/* =============================================================================
   NATURHAUS WECHSELLAND — Design System 2.0
   Aesthetic Direction: WARM EDITORIAL / ORGANIC PREMIUM
   Strictly derived from the official Branding Guide (Branding_NaturhausWechselland).
   - Palette: TON/HOLZ terracotta, SAND/STROH, NATUR/PUTZ warm grey, STEIN
   - Display: Source Serif 4 (open-source Minion relative, same designer) — ALL CAPS
   - Body:    Work Sans (guide-sanctioned web alternative for Seravek)
   - Signature elements: ">" chevron, organic "Störer" circles, thin infoboxes
   ========================================================================== */

/* ---------- Tokens -------------------------------------------------------- */
:root {
  /* Brand colours (exact from guide) */
  --stone:        #443e3b;   /* STEIN  — dominant dark */
  --terracotta:   #af6e4e;   /* TON/HOLZ — primary accent */
  --sand:         #c0a87e;   /* SAND/STROH — secondary */
  --clay:         #a4998f;   /* NATUR/PUTZ — warm grey, tertiary */

  /* Derived tones */
  --stone-900:    #2e2a28;   /* deepest, body ink */
  --stone-700:    #5a524e;   /* muted text */
  --terracotta-700:#915738;  /* accessible terracotta on light (≈4.4:1) */
  --sand-200:     #e7ddca;
  --clay-100:     #ece8e3;
  --cream:        #f7f3ec;   /* warm paper background */
  --cream-deep:   #efe7d9;
  --paper:        #ffffff;
  --line:         #e3dcd1;   /* hairline borders */

  --ink:          var(--stone-900);
  --muted:        var(--stone-700);

  /* Type */
  --font-display: "Source Serif 4", Georgia, "Times New Roman", serif;
  --font-body:    "Work Sans", -apple-system, BlinkMacSystemFont, sans-serif;

  /* Fluid type scale */
  --fs-xs:   0.78rem;
  --fs-sm:   0.9rem;
  --fs-base: 1.05rem;
  --fs-lg:   1.2rem;
  --fs-xl:   clamp(1.4rem, 1.1rem + 1.2vw, 1.85rem);
  --fs-2xl:  clamp(1.9rem, 1.3rem + 2.6vw, 3rem);
  --fs-3xl:  clamp(2.6rem, 1.6rem + 4.4vw, 5rem);
  --fs-hero: clamp(3rem, 1.6rem + 6vw, 6.5rem);

  /* Spacing scale (4/8 rhythm) */
  --s-1: 4px;  --s-2: 8px;  --s-3: 12px; --s-4: 16px; --s-6: 24px;
  --s-8: 32px; --s-12: 48px; --s-16: 64px; --s-24: 96px; --s-32: 128px;

  --container: 1200px;
  --container-narrow: 760px;

  --radius:   10px;
  --radius-lg:18px;

  --shadow-sm: 0 1px 3px rgba(46,42,40,.06), 0 4px 12px rgba(46,42,40,.05);
  --shadow-md: 0 8px 24px rgba(46,42,40,.10), 0 2px 6px rgba(46,42,40,.06);
  --shadow-lg: 0 24px 60px rgba(46,42,40,.18);

  --ease: cubic-bezier(.22,.61,.36,1);
  --dur:  .28s;

  --tracking-caps: .14em;   /* ~ guide "Laufweite +40" for sub-heads */
  --tracking-disp: .03em;   /* ~ guide "+20" for display */
}

/* ---------- Reset / base ------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  font-family: var(--font-body);
  font-weight: 350;
  font-size: var(--fs-base);
  line-height: 1.65;
  color: var(--ink);
  background: var(--cream);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, picture, svg, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
:focus-visible { outline: 3px solid var(--terracotta); outline-offset: 3px; border-radius: 3px; }

/* ---------- Typography --------------------------------------------------- */
h1, h2, h3 { font-family: var(--font-display); font-weight: 500; line-height: 1.04; color: var(--stone); }

.display {
  font-family: var(--font-display);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--tracking-disp);
  line-height: .98;
}
.h-hero  { font-size: var(--fs-hero); }
.h-1     { font-size: var(--fs-3xl); }
.h-2     { font-size: var(--fs-2xl); }
.h-3     { font-size: var(--fs-xl); }

.kicker {
  font-family: var(--font-body);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--tracking-caps);
  font-size: var(--fs-sm);
  color: var(--terracotta-700);
}
.subhead {
  font-family: var(--font-body);
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: var(--tracking-caps);
  font-size: var(--fs-lg);
  color: var(--stone);
}
.lead { font-size: var(--fs-lg); color: var(--muted); line-height: 1.7; }
.prose p { max-width: 65ch; margin-bottom: var(--s-4); }
.prose p:last-child { margin-bottom: 0; }
.text-center { text-align: center; }
.measure { max-width: 65ch; margin-inline: auto; }

/* ---------- Layout ------------------------------------------------------- */
.container { width: min(100% - 2 * var(--s-6), var(--container)); margin-inline: auto; }
.container-narrow { width: min(100% - 2 * var(--s-6), var(--container-narrow)); margin-inline: auto; }
.section { padding-block: clamp(var(--s-16), 8vw, var(--s-32)); }
.section--tight { padding-block: var(--s-12); }
.section--cream { background: var(--cream); }
.section--paper { background: var(--paper); }
.section--stone { background: var(--stone); color: var(--cream); }
.section--stone h1, .section--stone h2, .section--stone h3 { color: var(--paper); }
.stack > * + * { margin-top: var(--s-6); }
.section-head { max-width: 60ch; margin-bottom: var(--s-12); }
.section-head .kicker { display: inline-flex; align-items: center; gap: var(--s-2); margin-bottom: var(--s-3); }

/* ---------- Signature: ">" Chevron -------------------------------------- */
.chev {
  display: inline-block; width: .62em; height: .62em;
  border-right: .12em solid currentColor;
  border-top: .12em solid currentColor;
  transform: rotate(45deg);
  flex: none;
}
.chev--accent { color: var(--terracotta); }
.chev-lead { /* large standalone chevron above headlines, like the guide */
  display: inline-block; color: var(--terracotta);
  font-size: 1em; line-height: 0;
}
.chev-lead::before {
  content: ""; display: inline-block;
  width: .7em; height: .7em;
  border-right: 3px solid currentColor; border-top: 3px solid currentColor;
  transform: rotate(45deg);
}

/* ---------- Buttons ------------------------------------------------------ */
.btn {
  --btn-bg: var(--stone); --btn-fg: var(--paper);
  display: inline-flex; align-items: center; gap: var(--s-3);
  padding: var(--s-4) var(--s-8);
  background: var(--btn-bg); color: var(--btn-fg);
  font-weight: 600; font-size: var(--fs-sm);
  text-transform: uppercase; letter-spacing: .08em;
  border-radius: 100px;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  min-height: 48px;
}
.btn .chev { width: .55em; height: .55em; transition: transform var(--dur) var(--ease); }
.nav .btn { padding: var(--s-2) var(--s-5); font-size: .76rem; min-height: 34px; margin-inline-start: var(--s-2); box-shadow: var(--shadow-sm); }
.nav .btn .chev { width: .5em; height: .5em; }
.btn:hover { background: var(--terracotta-700); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn:hover .chev { transform: rotate(45deg) translate(2px, -2px); }
.btn--accent { --btn-bg: var(--terracotta-700); }
.btn--accent:hover { background: var(--stone); }
.btn--ghost {
  --btn-bg: transparent; --btn-fg: var(--stone);
  border: 1.5px solid var(--stone);
}
.btn--ghost:hover { background: var(--stone); color: var(--paper); transform: translateY(-2px); }
.btn--on-dark { --btn-bg: var(--paper); --btn-fg: var(--stone); }
.btn--on-dark:hover { background: var(--terracotta); color: var(--paper); }
.link-more {
  display: inline-flex; align-items: center; gap: var(--s-2);
  font-weight: 600; font-size: var(--fs-sm); color: var(--terracotta-700);
  text-transform: uppercase; letter-spacing: .06em;
  transition: gap var(--dur) var(--ease);
}
.link-more:hover { gap: var(--s-4); }
.link-more .chev { width: .5em; height: .5em; }

/* ---------- Header / Nav ------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--cream) 88%, transparent);
  backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.site-header.is-scrolled { border-bottom-color: var(--line); background: color-mix(in srgb, var(--cream) 96%, transparent); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: var(--s-6); padding-block: var(--s-3); }
.brand { display: flex; align-items: center; gap: var(--s-3); }
.brand img { height: 68px; width: auto; }
.nav { display: flex; align-items: center; gap: var(--s-6); }
.nav a:not(.btn) { font-weight: 500; font-size: .95rem; color: var(--stone); position: relative; padding-block: var(--s-2); }
.nav a:not(.btn)::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 0;
  background: var(--terracotta); transition: width var(--dur) var(--ease);
}
.nav a:not(.btn):hover::after, .nav a[aria-current="page"]::after { width: 100%; }
.nav a[aria-current="page"] { color: var(--terracotta-700); }
.nav-toggle { display: none; width: 48px; height: 48px; align-items: center; justify-content: center; }
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ""; display: block; width: 26px; height: 2px; background: var(--stone); transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease); position: relative;
}
.nav-toggle span::before { position: absolute; top: -8px; } .nav-toggle span::after { position: absolute; top: 8px; }
body.nav-open .nav-toggle span { background: transparent; }
body.nav-open .nav-toggle span::before { transform: translateY(8px) rotate(45deg); }
body.nav-open .nav-toggle span::after  { transform: translateY(-8px) rotate(-45deg); }

@media (max-width: 900px) {
  .nav-toggle { display: inline-flex; }
  .nav {
    position: fixed; inset: 0 0 0 auto; width: min(82vw, 360px);
    flex-direction: column; align-items: flex-start; justify-content: center; gap: var(--s-8);
    background: var(--cream); padding: var(--s-16) var(--s-12);
    transform: translateX(100%); transition: transform var(--dur) var(--ease);
    box-shadow: var(--shadow-lg);
  }
  body.nav-open .nav { transform: translateX(0); }
  .nav a { font-size: 1.3rem; font-family: var(--font-display); text-transform: uppercase; letter-spacing: .04em; }
  /* backdrop-filter on .site-header creates a containing block for our fixed .nav,
     confining it to the header's own box instead of the viewport. Drop it while open. */
  body.nav-open .site-header { backdrop-filter: none; }
}

/* ---------- Hero --------------------------------------------------------- */
.hero { position: relative; min-height: clamp(560px, 86vh, 900px); display: grid; }
.hero__media { position: absolute; inset: 0; }
.hero__media img { width: 100%; height: 100%; object-fit: cover; }
.hero__scrim { position: absolute; inset: 0; background:
  linear-gradient(180deg, rgba(46,42,40,.30) 0%, rgba(46,42,40,.12) 35%, rgba(46,42,40,.55) 100%); }
.hero__inner { position: relative; align-self: center; padding-block: var(--s-24); color: var(--paper); }
.hero h1 { color: var(--paper); text-shadow: 0 2px 30px rgba(46,42,40,.35); }
.hero .lead { color: rgba(255,255,255,.92); max-width: 34ch; }
.hero__cta { display: flex; flex-wrap: wrap; gap: var(--s-4); margin-top: var(--s-8); }

/* ---------- Störer (organic circle eyebrow) ------------------------------ */
.stoerer {
  display: inline-grid; place-items: center; text-align: center;
  aspect-ratio: 1; width: clamp(120px, 14vw, 168px);
  padding: var(--s-4);
  color: var(--stone);
  font-family: var(--font-body); font-weight: 500; text-transform: uppercase;
  letter-spacing: .12em; font-size: var(--fs-xs); line-height: 1.5;
  background: var(--sand);
  border-radius: 64% 36% 57% 43% / 47% 62% 38% 53%;
  box-shadow: var(--shadow-sm);
}
.stoerer--outline { background: transparent; border: 1.5px solid currentColor; color: var(--paper); }

/* ---------- Infobox (thin framed, guide) -------------------------------- */
.infobox { border: 1px solid var(--line); border-radius: var(--radius); padding: var(--s-8); background: var(--paper); }
.infobox .subhead { margin-bottom: var(--s-3); }
.section--stone .infobox { background: transparent; border-color: rgba(255,255,255,.28); }
.section--stone .subhead { color: var(--paper); }
.section--stone .infobox p:not(.subhead) { color: rgba(255,255,255,.86); }

/* ---------- Cards -------------------------------------------------------- */
.grid { display: grid; gap: var(--s-6); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 980px) { .grid-4 { grid-template-columns: repeat(2,1fr); } .grid-3 { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 620px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.card { background: var(--paper); border-radius: var(--radius-lg); padding: var(--s-8); box-shadow: var(--shadow-sm); transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease); }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.card__icon { width: 44px; height: 44px; color: var(--terracotta); margin-bottom: var(--s-4); }
.card__icon svg { width: 100%; height: 100%; }
.card h3 { font-size: var(--fs-lg); margin-bottom: var(--s-2); }
.card p { color: var(--muted); font-size: var(--fs-sm); }
.card--plain { background: transparent; box-shadow: none; padding: 0; }
.card--plain:hover { transform: none; }
.stat { font-family: var(--font-display); font-size: var(--fs-2xl); color: var(--terracotta-700); line-height: 1; }

/* ---------- Figure / image with caption + lightbox ---------------------- */
figure.media { margin: 0; position: relative; border-radius: var(--radius); overflow: hidden; background: var(--clay-100); aspect-ratio: 4 / 3; }
figure.media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .5s var(--ease); }
.zoomable { cursor: zoom-in; }
.zoomable:hover img { transform: scale(1.04); }
figure.media figcaption {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: var(--s-8) var(--s-4) var(--s-3);
  color: var(--paper); font-size: var(--fs-sm);
  background: linear-gradient(transparent, rgba(46,42,40,.78));
  opacity: 0; transform: translateY(8px); transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
figure.media:hover figcaption, figure.media:focus-within figcaption { opacity: 1; transform: none; }
.caption-static { font-size: var(--fs-sm); color: var(--muted); margin-top: var(--s-2); }

/* full-bleed banner */
.banner { position: relative; height: clamp(280px, 42vw, 520px); overflow: hidden; }
.banner img { width: 100%; height: 100%; object-fit: cover; }

/* ---------- Gallery / masonry-ish --------------------------------------- */
.gallery { display: grid; grid-template-columns: repeat(12, 1fr); gap: var(--s-3); grid-auto-flow: dense; }
.gallery figure.media { grid-column: span 4; aspect-ratio: 4/3; }
.gallery figure.media.is-wide { grid-column: span 8; }
.gallery figure.media.is-tall { grid-column: span 4; aspect-ratio: 3/4; }
@media (max-width: 760px) { .gallery { grid-template-columns: repeat(2,1fr); } .gallery figure.media, .gallery figure.media.is-wide, .gallery figure.media.is-tall { grid-column: span 1; aspect-ratio: 4/3; } }

/* Projekt-Seiten: Stack-Layout — jedes Foto voll breit, keine Rundungen */
.gallery--stack { display: flex; flex-direction: column; gap: var(--s-6); }
.gallery--stack figure.media,
.gallery--stack figure.media.is-wide,
.gallery--stack figure.media.is-tall { grid-column: unset; aspect-ratio: unset; border-radius: 0; max-height: 80vh; }
.gallery--stack figure.media img { border-radius: 0; }

/* ---------- Lightbox ----------------------------------------------------- */
.lightbox { position: fixed; inset: 0; z-index: 1000; display: none; place-items: center; padding: var(--s-8);
  background: rgba(46,42,40,.92); backdrop-filter: blur(6px); }
.lightbox.is-open { display: grid; }
.lightbox img { max-width: 92vw; max-height: 82vh; border-radius: var(--radius); box-shadow: var(--shadow-lg); }
.lightbox__cap { color: rgba(255,255,255,.85); text-align: center; margin-top: var(--s-4); font-size: var(--fs-sm); }
.lightbox__close, .lightbox__nav { position: absolute; color: var(--paper); width: 56px; height: 56px; display: grid; place-items: center; border-radius: 100px; background: rgba(255,255,255,.12); transition: background var(--dur) var(--ease); }
.lightbox__close { top: var(--s-6); right: var(--s-6); font-size: 1.6rem; }
.lightbox__nav { top: 50%; transform: translateY(-50%); font-size: 1.8rem; }
.lightbox__nav--prev { left: var(--s-6); } .lightbox__nav--next { right: var(--s-6); }
.lightbox__close:hover, .lightbox__nav:hover { background: rgba(255,255,255,.28); }
@media (max-width: 620px) { .lightbox__nav { width: 44px; height: 44px; } }

/* ---------- FAQ accordion ------------------------------------------------ */
.faq { max-width: 820px; margin-inline: auto; }
.faq__filters { display: flex; flex-wrap: wrap; gap: var(--s-2); margin-bottom: var(--s-8); justify-content: center; }
.faq__chip { padding: var(--s-2) var(--s-4); border: 1px solid var(--line); border-radius: 100px; font-size: var(--fs-sm); font-weight: 500; color: var(--muted); transition: all var(--dur) var(--ease); }
.faq__chip[aria-pressed="true"] { background: var(--stone); color: var(--paper); border-color: var(--stone); }
.faq__item { border-bottom: 1px solid var(--line); }
.faq__q { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: var(--s-4); text-align: left; padding: var(--s-6) 0; font-family: var(--font-display); font-size: var(--fs-lg); color: var(--stone); }
.faq__q .chev { transition: transform var(--dur) var(--ease); color: var(--terracotta); transform: rotate(135deg); }
.faq__item.is-open .faq__q .chev { transform: rotate(-45deg); }
.faq__a { overflow: hidden; max-height: 0; transition: max-height var(--dur) var(--ease); }
.faq__a-inner { padding-bottom: var(--s-6); color: var(--muted); }
.faq__item.is-open .faq__a { max-height: 600px; }

/* ---------- Media (blog + youtube) -------------------------------------- */
.post-card { display: flex; flex-direction: column; background: var(--paper); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease); }
.post-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.post-card__img { aspect-ratio: 16/10; overflow: hidden; }
.post-card__img img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s var(--ease); }
.post-card:hover .post-card__img img { transform: scale(1.05); }
.post-card__body { padding: var(--s-6); display: flex; flex-direction: column; gap: var(--s-3); flex: 1; }
.post-card__meta { font-size: var(--fs-xs); text-transform: uppercase; letter-spacing: .1em; color: var(--terracotta-700); font-weight: 600; }
.post-card h3 { font-size: var(--fs-lg); }
.post-card p { font-size: var(--fs-sm); color: var(--muted); }

.video-card { position: relative; aspect-ratio: 16/9; border-radius: var(--radius-lg); overflow: hidden; cursor: pointer; background: var(--stone); }
.video-card img { width: 100%; height: 100%; object-fit: cover; opacity: .9; transition: opacity var(--dur) var(--ease), transform .5s var(--ease); }
.video-card:hover img { opacity: 1; transform: scale(1.04); }
.video-card__play { position: absolute; inset: 0; display: grid; place-items: center; }
.video-card__play span { width: 76px; height: 76px; border-radius: 100px; background: rgba(255,255,255,.92); display: grid; place-items: center; box-shadow: var(--shadow-md); transition: transform var(--dur) var(--ease), background var(--dur) var(--ease); }
.video-card:hover .video-card__play span { transform: scale(1.08); background: var(--paper); }
.video-card__play span::after { content: ""; border-left: 22px solid var(--terracotta-700); border-top: 13px solid transparent; border-bottom: 13px solid transparent; margin-left: 6px; }
.video-card__title { position: absolute; left: 0; right: 0; bottom: 0; padding: var(--s-12) var(--s-6) var(--s-4); color: var(--paper); font-family: var(--font-display); font-size: var(--fs-lg); background: linear-gradient(transparent, rgba(46,42,40,.85)); }

/* ---------- Forms -------------------------------------------------------- */
.field { display: block; margin-bottom: var(--s-6); }
.field > span { display: block; font-weight: 600; font-size: var(--fs-sm); margin-bottom: var(--s-2); color: var(--stone); }
.field input, .field textarea, .field select {
  width: 100%; padding: var(--s-4); font: inherit; color: var(--ink);
  background: var(--paper); border: 1.5px solid var(--line); border-radius: var(--radius);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  min-height: 48px;
}
.field input:focus, .field textarea:focus, .field select:focus { border-color: var(--terracotta); box-shadow: 0 0 0 3px rgba(175,110,78,.15); outline: none; }

/* ---------- Footer ------------------------------------------------------- */
.site-footer { background: var(--stone); color: rgba(255,255,255,.82); padding-block: var(--s-16) var(--s-8); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: var(--s-12); align-items: start; }
@media (max-width: 820px) { .footer-grid { grid-template-columns: 1fr; gap: var(--s-8); } }
.site-footer h2 { color: var(--paper); font-size: var(--fs-2xl); margin-bottom: var(--s-4); }
.site-footer a { color: rgba(255,255,255,.82); transition: color var(--dur) var(--ease); }
.site-footer a:hover { color: var(--terracotta); }
.footer-claim { display: inline-flex; align-items: center; gap: var(--s-3); color: var(--sand); text-transform: uppercase; letter-spacing: var(--tracking-caps); font-size: var(--fs-sm); font-weight: 500; }
.footer-col h4 { color: var(--paper); text-transform: uppercase; letter-spacing: .1em; font-size: var(--fs-xs); font-family: var(--font-body); margin-bottom: var(--s-4); }
.footer-col a { display: block; padding-block: var(--s-1); }
.footer-social { display: flex; gap: var(--s-3); margin-top: var(--s-4); }
.footer-social a { width: 44px; height: 44px; display: grid; place-items: center; border: 1px solid rgba(255,255,255,.2); border-radius: 100px; }
.footer-social a:hover { background: var(--terracotta); border-color: var(--terracotta); color: var(--paper); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.14); margin-top: var(--s-12); padding-top: var(--s-6); display: flex; flex-wrap: wrap; gap: var(--s-4); justify-content: space-between; font-size: var(--fs-xs); }
.footer-bottom a { margin-right: var(--s-4); }

/* ---------- Scroll reveal (progressive enhancement: visible without JS) -- */
html.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
html.js .reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1 !important; transform: none !important; transition: none; }
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}

/* ---------- Utilities ---------------------------------------------------- */
.skip-link { position: absolute; left: -9999px; top: 0; background: var(--stone); color: #fff; padding: var(--s-3) var(--s-6); z-index: 1001; }
.skip-link:focus { left: var(--s-4); top: var(--s-4); }
.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; }
.text-accent { color: var(--terracotta-700); }
.mt-8 { margin-top: var(--s-8); } .mt-12 { margin-top: var(--s-12); }

/* ---------- Project cards (Vorzeigeprojekte) ----------------------------- */
.proj-card { display:flex; flex-direction:column; background:var(--paper); border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; text-decoration:none; color:inherit; transition:transform .2s var(--ease), box-shadow .2s var(--ease); }
.proj-card:hover { transform:translateY(-4px); box-shadow:0 12px 32px rgba(68,62,59,.12); }
.proj-card__img { margin:0; aspect-ratio:4/3; overflow:hidden; }
.proj-card__img img { width:100%; height:100%; object-fit:cover; transition:transform .4s var(--ease); }
.proj-card:hover .proj-card__img img { transform:scale(1.04); }
.proj-card__body { padding:var(--s-6); display:flex; flex-direction:column; gap:var(--s-2); flex:1; }
.proj-card__body .kicker { margin-bottom:0; }
.proj-card__body h3 { font-family:var(--font-display); font-size:var(--fs-xl); font-weight:500; color:var(--stone); margin:0; }
.proj-card__meta { font-size:var(--fs-sm); color:var(--muted); margin:0; }
.proj-card__cta { margin-top:auto; padding-top:var(--s-4); font-size:var(--fs-sm); font-weight:600; color:var(--terracotta-700); display:flex; align-items:center; gap:var(--s-1); }
@media (prefers-reduced-motion: reduce) { .proj-card, .proj-card__img img { transition:none; } .proj-card:hover { transform:none; } }

/* ---------- Converge diagram (Leistungstiefe) --------------------------- */
.converge { max-width: 360px; margin-inline: auto; }
.converge svg { width: 100%; height: auto; display: block; }
.converge__arrows path { animation: convergePulse 3.4s var(--ease) infinite; }
.converge__arrows path:nth-child(3),
.converge__arrows path:nth-child(4) { animation-delay: .25s; }
.converge__arrows path:nth-child(5),
.converge__arrows path:nth-child(6) { animation-delay: .5s; }
.converge__arrows path:nth-child(7),
.converge__arrows path:nth-child(8) { animation-delay: .75s; }
@keyframes convergePulse { 0%,100% { opacity: .45; } 50% { opacity: 1; } }
@media (prefers-reduced-motion: reduce) { .converge__arrows path { animation: none; opacity: .85; } }