/* Layout: gestapelte Lagen wie ein Burger – jede Sektion bleibt stehen, die nächste schiebt sich mit runder Kante darüber. Weiß, kühles Grau, dunkles Anthrazit, Logo-Blau als einziger Akzent. */
@font-face { font-family: "Barlow"; font-weight: 300; font-display: swap; src: url("../fonts/barlow-latin-300-normal.woff2") format("woff2"); }
@font-face { font-family: "Barlow"; font-weight: 400; font-display: swap; src: url("../fonts/barlow-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "Barlow"; font-weight: 500; font-display: swap; src: url("../fonts/barlow-latin-500-normal.woff2") format("woff2"); }
@font-face { font-family: "Barlow"; font-weight: 600; font-display: swap; src: url("../fonts/barlow-latin-600-normal.woff2") format("woff2"); }

:root {
  --weiss: #ffffff;
  --grau: #eef1f4;
  --linie: #dde2e7;
  --text: #15191e;
  --text-2: #5a636c;
  --akzent: #0a3f8f;
  --akzent-dunkel: #072e6a;
  --dunkel: #141a21;
  --dunkel-2: #1d252e;
  --f: "Barlow", "Segoe UI", system-ui, -apple-system, sans-serif;
  --w: 1240px;
  --radius: 32px;
  --kopf-h: 80px;
  color-scheme: light;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; scroll-padding-top: var(--kopf-h); }
body { margin: 0; background: var(--weiss); color: var(--text); font: 400 1.0625rem/1.65 var(--f); -webkit-font-smoothing: antialiased; }
body:has(.stapel) { background: var(--dunkel); }
img, video { max-width: 100%; height: auto; display: block; }
a { color: inherit; }
:focus-visible { outline: 3px solid var(--akzent); outline-offset: 3px; }
.wrap { max-width: var(--w); margin-inline: auto; padding-inline: 24px; }

h1, h2, h3 { margin: 0; font-weight: 500; line-height: 1.1; letter-spacing: -.015em; text-wrap: balance; }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: 1.5rem; }
p { margin: 0; }
.eyebrow { font-size: .78rem; font-weight: 600; text-transform: uppercase; letter-spacing: .18em; color: var(--akzent); }
.eyebrow-hell { color: rgba(255,255,255,.75); }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; font: 500 1rem/1 var(--f); padding: 16px 28px; border-radius: 999px; text-decoration: none; cursor: pointer; border: 1.5px solid transparent; transition: background .2s, color .2s, border-color .2s; }
.btn svg { width: 18px; height: 18px; flex: none; }
.btn-akzent { background: var(--akzent); color: #fff; }
.btn-akzent:hover { background: var(--akzent-dunkel); }
.btn-weiss { color: #fff; border-color: rgba(255,255,255,.6); background: transparent; }
.btn-weiss:hover { background: #fff; color: var(--text); }

/* Kopfzeile */
.kopf { position: sticky; top: env(safe-area-inset-top, 0px); z-index: 50; background: rgba(255,255,255,.95); backdrop-filter: blur(10px); border-bottom: 1px solid var(--linie); }
.kopf .wrap { display: flex; align-items: center; justify-content: space-between; gap: 24px; min-height: 80px; }
.logo { display: flex; align-items: center; text-decoration: none; }
.logo-bild { height: 58px; width: auto; }
.nav { display: flex; gap: 36px; }
.nav a { text-decoration: none; font-weight: 500; color: var(--text-2); transition: color .2s; }
.nav a:hover { color: var(--akzent); }
.kopf .btn { padding: 12px 20px; }
@media (max-width: 900px) { .nav { display: none; } }
@media (max-width: 520px) { .kopf .btn span { display: none; } .kopf .btn { padding: 12px; } .logo-bild { height: 48px; } }

/* ===== Gestapelte Lagen ===== */
.lage { position: sticky; top: var(--kopf-h); z-index: 1; border-radius: var(--radius) var(--radius) 0 0; overflow: hidden;
  box-shadow: 0 -18px 40px rgba(10,14,20,.18); transform: scale(var(--schrumpf, 1)); transform-origin: 50% 0; }
.lage + .lage { margin-top: calc(var(--radius) * -1); }
.lage::after { content: ""; position: absolute; inset: 0; background: #0a0e14; opacity: calc(var(--deckung, 0) * .45); pointer-events: none; z-index: 5; }
.lage-weiss { background: var(--weiss); }
.lage-grau { background: var(--grau); }
.lage-dunkel { background: var(--dunkel-2); color: #fff; }
.lage:not(.lage-hero) > .wrap { padding-block: clamp(80px, 9vw, 120px) clamp(96px, 10vw, 140px); }
.lage-kopf { display: grid; gap: 14px; margin-bottom: clamp(36px, 5vw, 56px); max-width: 720px; }
.lage-kopf p { color: var(--text-2); font-size: 1.1rem; }

/* Lage 1: Start */
.lage-hero { border-radius: 0; box-shadow: none; height: calc(100vh - var(--kopf-h)); height: calc(100dvh - var(--kopf-h)); min-height: 520px; background: var(--dunkel); color: #fff; }
.lage-hero video { position: absolute; inset: 0; width: 100%; height: 100% !important; object-fit: cover; }
.lage-hero::before { content: ""; position: absolute; inset: 0; z-index: 1; background: linear-gradient(90deg, rgba(10,14,20,.72) 0%, rgba(10,14,20,.35) 50%, rgba(10,14,20,.05) 80%), linear-gradient(0deg, rgba(10,14,20,.5), rgba(10,14,20,0) 45%); }
.hero-inhalt { position: relative; z-index: 2; height: 100%; display: flex; flex-direction: column; justify-content: flex-end; gap: 20px; padding-block: 0 clamp(80px, 11vw, 130px); }
.lage-hero h1 { font-size: clamp(2.4rem, 5.6vw, 4.4rem); font-weight: 400; max-width: 16ch; }
.lage-hero .lead { font-size: clamp(1.05rem, 1.5vw, 1.25rem); max-width: 520px; color: rgba(255,255,255,.86); }
.knoepfe { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 8px; }
.video-knopf { position: absolute; z-index: 3; right: 24px; bottom: clamp(80px, 11vw, 130px); width: 44px; height: 44px; border-radius: 50%; border: 1px solid rgba(255,255,255,.55); background: rgba(0,0,0,.25); color: #fff; display: grid; place-items: center; cursor: pointer; }
.video-knopf svg { width: 15px; height: 15px; }

/* Lage 2: Leistungen */
.leistungen { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; }
.leistung { background: var(--grau); border-radius: 22px; overflow: hidden; display: grid; grid-template-rows: auto 1fr; }
.leistung img { width: 100%; aspect-ratio: 4 / 3; object-fit: cover; }
.leistung-text { padding: 28px 28px 32px; display: grid; gap: 12px; align-content: start; }
.leistung-nr { font-size: .85rem; font-weight: 600; color: var(--akzent); letter-spacing: .1em; font-variant-numeric: tabular-nums; }
.leistung p { color: var(--text-2); }
.leistung ul { list-style: none; margin: 6px 0 0; padding: 0; border-top: 1px solid var(--linie); }
.leistung li { padding: 10px 0; border-bottom: 1px solid var(--linie); font-size: .97rem; }
@media (max-width: 900px) { .leistungen { grid-template-columns: 1fr; } }

/* Lage 3: Projekte */
.projekte { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); grid-auto-rows: clamp(200px, 22vw, 290px); gap: 16px; }
.projekt { position: relative; margin: 0; border-radius: 20px; overflow: hidden; background: var(--linie); }
.projekt img { width: 100%; height: 100% !important; object-fit: cover; transition: transform .6s ease; }
.projekt:hover img { transform: scale(1.04); }
.projekt figcaption { position: absolute; left: 0; right: 0; bottom: 0; padding: 48px 20px 18px; color: #fff; display: grid; gap: 2px;
  background: linear-gradient(0deg, rgba(10,14,20,.78), rgba(10,14,20,0)); }
.projekt small { font-size: .74rem; font-weight: 600; text-transform: uppercase; letter-spacing: .14em; color: rgba(255,255,255,.75); }
.projekt b { font-size: 1.15rem; font-weight: 500; }
.projekt-gross { grid-column: span 2; grid-row: span 2; }
.projekt-gross b { font-size: 1.5rem; }
.projekt-breit { grid-column: span 2; }
@media (max-width: 760px) { .projekte { grid-template-columns: 1fr; grid-auto-rows: 240px; } .projekt-gross, .projekt-breit { grid-column: auto; grid-row: auto; } }

/* Lage 4: Unternehmen */
.split { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: clamp(32px, 6vw, 88px); align-items: center; }
.ueber-bild { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; border-radius: 22px; }
.text-block { display: grid; gap: 18px; }
.lage-dunkel .text-block p { color: rgba(255,255,255,.8); }
.fakten { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); margin: 12px 0 0; border-top: 1px solid rgba(255,255,255,.18); }
.fakten div { padding-top: 18px; display: grid; gap: 4px; }
.fakten dt { font-size: .75rem; text-transform: uppercase; letter-spacing: .14em; color: rgba(255,255,255,.55); }
.fakten dd { margin: 0; font-size: clamp(1.2rem, 2vw, 1.5rem); font-weight: 400; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } .ueber-bild { aspect-ratio: 4 / 3; } }
@media (max-width: 480px) { .fakten { grid-template-columns: 1fr; } .fakten div { padding-block: 12px; border-bottom: 1px solid rgba(255,255,255,.12); } }

/* Lage 5: Kontakt */
.kontakt-grid { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(32px, 6vw, 72px); align-items: start; }
.kanal { display: flex; gap: 18px; align-items: center; padding: 20px 0; border-bottom: 1px solid var(--linie); text-decoration: none; }
.kanal:first-child { border-top: 1px solid var(--linie); }
.kanal svg { width: 22px; height: 22px; color: var(--akzent); flex: none; }
.kanal small { display: block; color: var(--text-2); font-size: .78rem; text-transform: uppercase; letter-spacing: .12em; }
.kanal b { font-size: 1.15rem; font-weight: 500; overflow-wrap: anywhere; }
a.kanal:hover b { color: var(--akzent); }
form { display: grid; gap: 18px; background: var(--grau); padding: clamp(24px, 4vw, 40px); border-radius: 22px; }
.zeile { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 18px; }
.feld { display: grid; gap: 6px; }
label { font-size: .86rem; font-weight: 500; color: var(--text-2); }
input, select, textarea { font: inherit; color: var(--text); background: var(--weiss); border: 1px solid var(--linie); border-radius: 12px; padding: 12px 14px; width: 100%; }
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--akzent); box-shadow: 0 0 0 3px rgba(10,63,143,.15); }
textarea { min-height: 130px; resize: vertical; }
form .btn { justify-self: start; }
.hinweis { font-size: .85rem; color: var(--text-2); }
.form-status { color: var(--akzent); font-weight: 500; }
@media (max-width: 860px) { .kontakt-grid { grid-template-columns: 1fr; } }

/* Lage 6: Footer */
.fuss { background: var(--dunkel); color: rgba(255,255,255,.7); font-size: .95rem; }
.lage.fuss > .wrap { padding-block: 72px 40px; }
.fuss-grid { display: grid; grid-template-columns: 2fr 1.3fr 1fr 1fr; gap: 32px; }
.logo-fuss { height: 110px; width: auto; }
.fuss h4 { color: #fff; margin: 0 0 12px; font-size: 1rem; font-weight: 600; }
.fuss p + p { margin-top: 10px; }
.fuss a { display: block; padding: 3px 0; text-decoration: none; }
.fuss a:hover { color: #fff; }
.fuss .unten { grid-column: 1 / -1; display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,.12); font-size: .86rem; }
.fuss .unten a { display: inline; }
@media (max-width: 860px) { .fuss-grid { grid-template-columns: 1fr 1fr; } .fuss-marke { grid-column: 1 / -1; } }
@media (max-width: 760px) { .lage.fuss > .wrap { padding-bottom: 96px; } }

/* Mobile Leiste */
.anrufleiste { display: none; }
@media (max-width: 760px) {
  :root { --radius: 24px; }
  .anrufleiste { display: grid; grid-template-columns: 1fr 1fr; position: fixed; left: 0; right: 0; bottom: 0; z-index: 60; padding-bottom: env(safe-area-inset-bottom, 0px); background: var(--weiss); border-top: 1px solid var(--linie); }
  .anrufleiste a { display: flex; align-items: center; justify-content: center; gap: 8px; padding: 15px; font-weight: 600; text-decoration: none; }
  .anrufleiste a:first-child { background: var(--akzent); color: #fff; }
  .anrufleiste svg { width: 20px; height: 20px; }
}

/* Unterseiten (Impressum, Datenschutz) */
.recht { max-width: 800px; padding-block: 64px 96px; }
.recht h1 { font-size: clamp(2.4rem, 6vw, 3.4rem); font-weight: 400; margin: 14px 0 36px; }
.recht h2 { font-size: 1.4rem; margin: 40px 0 12px; }
.recht p, .recht li { color: var(--text-2); }
.recht p + p { margin-top: 12px; }
.recht a { color: var(--akzent); }
.recht .vorlage { border-left: 4px solid var(--akzent); background: var(--grau); padding: 16px 20px; color: var(--text); margin-bottom: 32px; border-radius: 0 12px 12px 0; }
footer.fuss:not(.lage) { padding-block: 32px; }

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } * { transition: none !important; } .lage { transform: none !important; } }
@media (max-width: 760px) { .lage { transform: none !important; } }

/* ===== Lagen wieder normal im Fluss ===== */
.lage { position: relative !important; top: auto !important; transform: none !important; border-radius: 0; box-shadow: none; overflow: visible; }
.lage + .lage { margin-top: 0; }
.lage::after { display: none; }
.lage-hero { overflow: hidden; }

/* Projekte: Raster nach Bildformat (alle Kacheln 4:3, nichts wird stark beschnitten) */
.projekte { grid-template-columns: repeat(6, minmax(0, 1fr)); grid-auto-rows: auto; }
.projekt { grid-column: span 2; aspect-ratio: 4 / 3; }
.projekt-gross { grid-column: span 4; grid-row: span 2; aspect-ratio: auto; }
.projekt-unten { grid-column: span 3; }
.projekt img { object-position: var(--pos, 50% 50%); }
@media (max-width: 760px) {
  .projekte { grid-template-columns: 1fr; }
  .projekt, .projekt-gross, .projekt-unten { grid-column: auto; grid-row: auto; aspect-ratio: 4 / 3; }
}
.leistung img { object-position: var(--pos, 50% 50%); }

/* ===== Rohbau in 3D (heller Studio-Look) ===== */
.aufbau3d { position: relative; height: 240vh; background: #e9edf1; color: var(--text); }
.a3-sticky { position: sticky; top: var(--kopf-h); height: calc(100vh - var(--kopf-h)); height: calc(100dvh - var(--kopf-h)); overflow: hidden; }
#a3-canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.a3-ersatz { position: absolute; inset: 0; width: 100%; height: 100% !important; object-fit: cover; }
.a3-ui { position: absolute; inset: 0; max-width: var(--w); margin-inline: auto; padding: clamp(40px, 9vh, 96px) 24px; pointer-events: none; display: flex; align-items: flex-start; }
.a3-kopf { display: grid; gap: 14px; max-width: 380px; }
.a3-kopf h2 { font-size: clamp(2.4rem, 4.6vw, 3.6rem); font-weight: 400; }
.a3-kopf p { color: var(--text-2); font-size: 1.08rem; }
@media (max-width: 760px) {
  .aufbau3d { height: 220vh; }
  .a3-ui { padding: 24px 16px; }
  .a3-kopf h2 { font-size: 2rem; }
  .a3-kopf p { font-size: .98rem; }
}

/* Einsatzgebiet im Kontakt */
.gebiet { margin-top: 36px; display: grid; gap: 10px; }
.gebiet h3 { font-size: 1.15rem; }
.gebiet p { color: var(--text-2); font-size: .97rem; }
.orte { list-style: none; padding: 0; margin: 6px 0 0; display: flex; flex-wrap: wrap; gap: 8px; }
.orte li { background: var(--grau); border-radius: 999px; padding: 6px 14px; font-size: .88rem; }