/* =========================================================
   Ingenieur- & Sachverständigenbüro Alwin Neulinger
   Design tokens
   ========================================================= */
:root{
  /* --- offizielle Markenfarben (Farbvariante 02, blau) --- */
  --blue:        #1D49B7;   /* Ocean Twilight */
  --blue-deep:   #12306F;   /* abgeleitet, für Hover/Kontrast */
  --powder:      #8BD0EF;   /* Powder Blue */
  --grey:        #E2E2E2;   /* Light Grey */

  /* --- abgeleitete Neutrals für Text/Flächen (nicht Teil des Farbspecs) --- */
  --ink:        #14264A;
  --ink-soft:   #3B4E70;
  --blueprint:  #EEF4FA;
  --paper:      #FBFAF7;
  --line:       #C9D6E3;
  --line-soft:  #E3E9F1;
  --stone:      #667085;
  --stone-light:#98A2B3;
  --ok:         #3C8562;
  --white:      #FFFFFF;

  --display: "Plus Jakarta Sans", "Segoe UI", sans-serif;
  --body:    "Plus Jakarta Sans", "Segoe UI", sans-serif;
  --mono:    "Plus Jakarta Sans", "Segoe UI", sans-serif;

  --maxw: 1180px;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; }
#kompetenz, #leistungen, #leist-oeffentlich, #leist-industrie, #leist-privat, #ablauf, #referenzen, #kontakt{
  scroll-margin-top:88px;
}
body{
  margin:0;
  font-family:var(--body);
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  line-height:1.55;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
h1,h2,h3{
  font-family:var(--display);
  margin:0 0 .4em;
  letter-spacing:-0.01em;
  font-weight:700;
}
p{ margin:0 0 1em; color:var(--ink-soft); }
.wrap{
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 28px;
}
.eyebrow{
  font-family:var(--mono);
  font-weight:600;
  font-size:12.5px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--blue);
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:22px; height:1px;
  background:currentColor;
  display:inline-block;
}
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--display);
  font-weight:600;
  font-size:14px;
  letter-spacing:.01em;
  padding:13px 22px;
  border-radius:2px;
  border:1px solid var(--blue);
  transition:background .18s ease, color .18s ease, transform .18s ease;
}
.btn-solid{
  background:var(--blue);
  color:var(--white);
}
.btn-solid:hover{ background:var(--blue-deep); transform:translateY(-1px); }
.btn-ghost{
  color:var(--blue);
  border-color:var(--line);
}
.btn-ghost:hover{ border-color:var(--blue); background:var(--blueprint); }
.btn-ghost.on-dark{
  color:var(--white);
  border-color:rgba(255,255,255,.35);
}
.btn-ghost.on-dark:hover{ border-color:#fff; background:rgba(255,255,255,.08); }
.kontakt .btn-solid{ border-color:rgba(255,255,255,.4); }

/* ---------- Header ---------- */
header{
  position:sticky; top:0; z-index:50;
  background:rgba(251,250,247,.88);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line-soft);
}
.nav{
  display:flex; align-items:center; justify-content:space-between;
  padding:16px 28px;
  max-width:var(--maxw);
  margin:0 auto;
}
.brand{ display:flex; align-items:center; flex-shrink:0; }
.brand-full{ height:52px; width:auto; flex-shrink:0; }
.nav-links{ display:flex; gap:22px; align-items:center; }
.nav-links a{
  font-family:var(--display);
  font-weight:700;
  font-size:15px;
  color:var(--ink);
  letter-spacing:.01em;
  white-space:nowrap;
  position:relative;
  padding-bottom:4px;
}
.nav-links a::after{
  content:"";
  position:absolute;
  left:0; right:100%; bottom:0;
  height:2px;
  background:var(--blue);
  transition:right .18s ease;
}
.nav-links a:hover::after{ right:0; }
.nav-links a:hover{ color:var(--blue); }
.nav-cta{ display:flex; gap:12px; flex:none; }
.nav-cta .btn{ white-space:nowrap; }
.nav-toggle{ display:none; }

/* ---------- Hero ---------- */
.hero{
  position:relative;
  background:
    linear-gradient(180deg, rgba(226,226,226,.42) 0%, rgba(251,250,247,.78) 100%),
    url('assets/hero-bg-faded.png');
  background-size: cover, cover;
  background-position: center, center 30%;
  overflow:hidden;
  border-bottom:1px solid var(--line-soft);
}
.grain-overlay{
  position:absolute; inset:0;
  width:100%; height:100%;
  pointer-events:none;
}
.hero-inner{
  position:relative;
  max-width:var(--maxw);
  margin:0 auto;
  padding:52px 28px 40px;
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:56px;
  align-items:center;
}
.hero-tag{
  font-family:var(--mono);
  font-weight:600;
  font-size:12.5px;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--blue);
  margin-bottom:18px;
  display:block;
}
.hero h1{
  font-size:clamp(32px, 4vw, 50px);
  line-height:1.08;
  color:var(--ink);
  max-width:12ch;
}
.hero h1 em{
  font-style:normal;
  color:var(--blue);
}
.hero-lede{
  font-size:17px;
  max-width:46ch;
  margin-bottom:30px;
}
.hero-actions{ display:flex; gap:14px; flex-wrap:wrap; margin-bottom:36px; }
.hero-meta{
  display:flex;
  gap:28px;
  flex-wrap:wrap;
  padding-top:24px;
  border-top:1px solid var(--line-soft);
}
.hero-meta div{ display:flex; flex-direction:column; gap:2px; }
.hero-meta .n{
  font-family:var(--display);
  font-size:22px;
  color:var(--ink);
  font-weight:700;
}
.hero-meta .l{
  font-family:var(--mono);
  font-weight:600;
  font-size:12.5px;
  color:var(--stone);
  letter-spacing:.03em;
}

/* ---- Signature diagram: building cross-section ---- */
.diagram{
  position:relative;
}
.diagram-card{
  border:1px solid rgba(20,38,74,.28);
  border-radius:3px;
  padding:20px 20px 14px;
  background:rgba(251,250,247,.62);
}
.diagram svg{ width:100%; height:auto; overflow:visible; }
.diagram .diagram-caption{
  font-family:var(--mono);
  font-weight:600;
  font-size:12.5px;
  color:var(--stone);
  text-align:center;
  margin-top:6px;
  letter-spacing:.04em;
}

/* rotating reference teaser */
.diagram-ref{
  position:relative;
  display:block;
  margin-top:16px;
  border-radius:3px;
  overflow:hidden;
  border:1px solid var(--line-soft);
  height:110px;
}
.ref-slide{
  position:absolute; inset:0;
  display:block;
  opacity:0;
  pointer-events:none;
  transition:opacity 3.2s ease-in-out;
  background:var(--ink);
}
.ref-slide.is-active{ opacity:1; pointer-events:auto; }
.ref-slide img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.ref-slide-placeholder{
  background:linear-gradient(135deg, var(--blue), var(--ink));
}
.diagram-ref-overlay{
  position:absolute; inset:0;
  background:linear-gradient(90deg, rgba(29,73,183,.85) 0%, rgba(29,73,183,.45) 55%, rgba(29,73,183,0) 100%);
  display:flex;
  flex-direction:column;
  justify-content:center;
  gap:3px;
  padding-left:20px;
}
.diagram-ref-overlay-static{ background:none; }
.diagram-ref-label{
  font-family:var(--mono);
  font-weight:600;
  font-size:12.5px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:var(--powder);
}
.diagram-ref-title{
  font-family:var(--display);
  font-weight:700;
  font-size:16px;
  color:var(--white);
}
.ref-dots{
  position:absolute;
  bottom:10px; right:14px;
  display:flex;
  gap:6px;
  z-index:2;
}
.ref-dot{
  width:6px; height:6px;
  border-radius:50%;
  background:rgba(255,255,255,.4);
  transition:background .3s ease;
}
.ref-dot.is-active{ background:var(--white); }

/* ---------- Sections ---------- */
section{ padding:88px 0; }
.section-head{
  max-width:640px;
  margin:0 0 48px;
}
.section-head h2{
  font-size:clamp(26px,3vw,34px);
  color:var(--ink);
}
.section-head p{ font-size:16px; }

/* Kompetenz */
.kompetenz{ background:var(--white); border-top:1px solid var(--line-soft); border-bottom:1px solid var(--line-soft); }
.kompetenz-intro{
  max-width:900px;
  margin-bottom:48px;
}
.kompetenz-intro p{ font-size:16.5px; }
.kompetenz-intro .lead{
  font-family:var(--display);
  font-size:22px;
  font-weight:700;
  color:var(--ink);
  line-height:1.35;
  margin-bottom:18px;
}

/* Kernkompetenz: Karten links (gestapelt), Ablauf rechts */
.kompetenz-split{
  display:grid;
  grid-template-columns:1fr 1.15fr;
  gap:56px;
  align-items:stretch;
}

/* Kundenkreis-Übersichtskarten */
.kompetenz-groups{
  display:flex;
  flex-direction:column;
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
  height:100%;
}
.kg-card{
  background:var(--paper);
  padding:24px 26px;
  display:flex;
  flex-direction:column;
  justify-content:center;
  gap:10px;
  flex:1;
  border-left:3px solid transparent;
  transition:background .18s ease, transform .18s ease, border-color .18s ease;
}
.kg-card:hover{ background:var(--blueprint); transform:translateX(3px); }
.kg-accent-blue{ border-left-color:var(--blue); }
.kg-accent-powder{ border-left-color:var(--powder); }
.kg-top{ display:flex; align-items:center; gap:12px; }
.kg-badge{
  width:40px; height:40px;
  border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  flex:none;
  background:var(--blue);
}
.kg-icon{ color:var(--white); }
.kg-idx{
  font-family:var(--display);
  font-weight:800;
  font-size:15px;
  color:var(--stone-light);
  margin-left:auto;
}
.kg-icon{ width:20px; height:20px; }
.kg-card h3{ font-size:18px; color:var(--ink); margin:0; }
.kg-card p{ font-size:14px; color:var(--stone); margin:0; }
.kg-count{
  font-family:var(--mono);
  font-weight:600;
  font-size:12.5px;
  color:var(--blue);
  margin-top:2px;
}

/* Ablauf */
.kompetenz-ablauf{ display:flex; flex-direction:column; height:100%; }
.process-list{
  list-style:none; margin:0; padding:0;
  border-top:1px solid var(--line-soft);
  flex:1;
  display:flex;
  flex-direction:column;
  justify-content:space-between;
}
.process-list li{
  display:flex; align-items:center;
  gap:16px;
  padding:12px 0;
  border-bottom:1px solid var(--line-soft);
}
.idx-badge{
  font-family:var(--display);
  font-weight:800;
  font-size:14px;
  color:var(--white);
  background:var(--blue);
  width:32px; height:32px;
  border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  flex:none;
}
.process-list .t{
  font-family:var(--display);
  font-weight:700;
  font-size:16px;
  color:var(--ink);
  width:110px;
  flex:none;
  padding-top:3px;
}
.process-list .d{ font-size:14px; color:var(--stone); margin:0; padding-top:3px; }

/* Leistungen */
.leistungen{ background:var(--grey); position:relative; overflow:hidden; }
.leist-group{ margin-bottom:48px; }
.leist-group:last-child{ margin-bottom:0; }
.leist-group-head{
  display:flex;
  justify-content:space-between;
  align-items:baseline;
  flex-wrap:wrap;
  gap:8px 24px;
  margin-bottom:18px;
  padding-bottom:14px;
  border-bottom:1px solid rgba(20,38,74,.16);
}
.leist-group-label{
  font-family:var(--mono);
  font-weight:600;
  font-size:12.5px;
  letter-spacing:.06em;
  text-transform:uppercase;
  color:var(--blue-deep);
}
.leist-group-head p{
  font-size:14px;
  color:var(--ink-soft);
  margin:0;
  max-width:46ch;
}
.leist-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:0;
  border-top:1px solid var(--line);
  border-left:1px solid var(--line);
}
.leist-grid.cols-1{ grid-template-columns:1fr; }
.leist-grid.cols-2{ grid-template-columns:repeat(2, 1fr); }
.leist-grid.cols-3{ grid-template-columns:repeat(3, 1fr); }
.leist-grid.cols-4{ grid-template-columns:repeat(4, 1fr); }
.leist-card{
  background:var(--paper);
  padding:32px 28px;
  min-height:210px;
  display:flex;
  flex-direction:column;
  gap:14px;
  border-right:1px solid var(--line);
  border-bottom:1px solid var(--line);
  transition:background .18s ease;
}
.leist-card:hover{ background:var(--white); }
.leist-strip{
  width:calc(100% + 56px);
  height:96px;
  object-fit:cover;
  display:block;
  margin:-32px -28px 4px;
}
.leist-top{ display:flex; align-items:center; gap:12px; }
.leist-card .num{
  font-family:var(--display);
  font-weight:800;
  font-size:15px;
  color:var(--stone-light);
  margin-left:auto;
}
.leist-badge{
  width:36px; height:36px;
  border-radius:50%;
  background:var(--blue);
  display:flex; align-items:center; justify-content:center;
  flex:none;
}
.leist-card .icon{ width:19px; height:19px; color:var(--white); }
.leist-card h3{ font-size:18px; color:var(--ink); margin-bottom:2px; }
.leist-card p{ font-size:14px; margin:0; }
.leist-grid.cols-1 .leist-card p{ max-width:56ch; }

/* Referenzen */
.referenzen{ background:var(--white); border-top:1px solid var(--line-soft); border-bottom:1px solid var(--line-soft); }
.ref-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(320px, 1fr));
  gap:1px;
  background:var(--line);
  border:1px solid var(--line);
}
.ref-grid-3{ grid-template-columns:repeat(3, 1fr); }
.ref-card{
  background:var(--paper);
  display:grid;
  grid-template-columns:1.1fr 1fr;
}
.ref-card-stack{
  grid-template-columns:1fr;
  display:flex;
  flex-direction:column;
}
.ref-media{ overflow:hidden; height:220px; position:relative; }
.ref-media img{ width:100%; height:100%; object-fit:cover; display:block; transition:transform .35s ease; }
.ref-card-stack .ref-media{ height:220px; }
.ref-media-click{ cursor:pointer; }
.ref-media-click:hover img{ transform:scale(1.05); }
.ref-media-hint{
  position:absolute;
  bottom:12px; right:14px;
  background:rgba(20,38,74,.78);
  color:var(--white);
  font-family:var(--mono);
  font-weight:600;
  font-size:11.5px;
  letter-spacing:.02em;
  padding:6px 12px;
  border-radius:2px;
  pointer-events:none;
  opacity:0;
  transform:translateY(6px);
  transition:opacity .25s ease, transform .25s ease;
}
.ref-media-click:hover .ref-media-hint,
.ref-media-click:focus-visible .ref-media-hint{ opacity:1; transform:translateY(0); }
.ref-media-placeholder{
  display:flex;
  align-items:center;
  justify-content:center;
  background:var(--blueprint);
  color:var(--stone-light);
  font-family:var(--mono);
  font-weight:600;
  font-size:12.5px;
  letter-spacing:.04em;
}
.ref-body{
  padding:32px 30px;
  display:flex;
  flex-direction:column;
  justify-content:center;
  gap:10px;
}
.ref-card-stack .ref-body{ padding:26px 26px; flex:1; }
.ref-tag{
  font-family:var(--mono);
  font-weight:600;
  font-size:12.5px;
  letter-spacing:.05em;
  text-transform:uppercase;
  color:var(--blue);
}
.ref-body h3{ font-size:21px; color:var(--ink); margin:0; }
.ref-card-stack .ref-body h3{ font-size:19px; }
.ref-body p{ font-size:14.5px; color:var(--stone); margin:0; }

/* Referenz-Strip */
.strip{
  background:var(--grey);
}
.strip .wrap{
  display:flex;
  flex-wrap:wrap;
  gap:0;
  position:relative;
}
.strip .stat{
  flex:1 1 200px;
  padding:30px 28px;
  border-left:1px solid var(--line-soft);
}
.strip .stat:first-child{ border-left:none; padding-left:0; }
.strip .stat .n{
  font-family:var(--display);
  font-size:30px;
  font-weight:700;
  color:var(--blue);
}
.strip .stat .l{
  font-family:var(--mono);
  font-weight:600;
  font-size:12px;
  color:var(--ink);
  opacity:.75;
  margin-top:4px;
}

/* Marken-Mood (echtes Baustellenfoto) */
.mood{
  position:relative;
  min-height:460px;
  display:flex;
  align-items:center;
  justify-content:center;
  overflow:hidden;
  background:#2c2d30;
}
.mood-bg{
  position:absolute; inset:0;
  width:100%; height:100%;
  background-size:cover;
  background-position:center 40%;
}
.mood-bg::after{
  content:"";
  position:absolute; inset:0;
  background:radial-gradient(ellipse at center, rgba(26,27,29,.56) 0%, rgba(26,27,29,.74) 100%);
}
.mood-inner{
  position:relative;
  padding-top:64px;
  padding-bottom:64px;
  display:flex;
  justify-content:center;
}
.mood-logo-full{
  width:min(300px, 34vw);
  height:auto;
  filter:drop-shadow(0 4px 18px rgba(0,0,0,.5));
}

/* Kontakt */
.kontakt{
  background:var(--blue);
  color:var(--white);
  position:relative;
  overflow:hidden;
}
.kontakt-inner{
  position:relative;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:60px;
}
.kontakt h2{ color:var(--white); font-size:clamp(26px,3vw,34px); max-width:14ch; }
.kontakt .hero-lede{ color:#D6E6F7; }
.kontakt-card{
  padding-top:8px;
}
.kontakt-row{
  display:flex; justify-content:space-between; align-items:center;
  padding:18px 0;
  border-bottom:1px solid rgba(255,255,255,.16);
  gap:16px;
}
.kontakt-row:last-child{ border-bottom:none; }
.kontakt-row .l{
  font-family:var(--mono);
  font-weight:600;
  font-size:12.5px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:#9FB4DE;
}
.kontakt-row .v{
  font-family:var(--mono);
  font-weight:600;
  font-size:15px;
  color:var(--white);
  text-align:right;
}
.kontakt-row a.v:hover{ color:var(--powder); }
.kontakt-icon{ width:38px; height:auto; margin-bottom:20px; }
.kontakt-actions{ display:flex; gap:12px; margin-top:26px; flex-wrap:wrap; }

/* Footer */
footer{
  position:relative;
  background:
    linear-gradient(rgba(16,17,19,.72), rgba(16,17,19,.78)),
    url('assets/footer-bg.jpg');
  background-size:cover;
  background-position:center;
  color:var(--powder);
  border-top:1px solid rgba(255,255,255,.14);
}
.footer-inner{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:26px 0;
  flex-wrap:wrap;
  gap:14px;
  font-family:var(--mono);
  font-weight:600;
  font-size:12px;
}
.footer-inner a:hover{ color:#fff; }
.footer-brand{ display:inline-flex; align-items:center; gap:9px; }
.footer-brand img{ display:block; opacity:.9; }
.footer-links{ display:flex; gap:22px; }

/* ---------- Responsive ---------- */
@media (max-width: 880px){
  .nav-links{ display:none; }
  .hero-inner{ grid-template-columns:1fr; padding-top:56px; }
  .diagram{ order:-1; max-width:340px; margin:0 auto 12px; }
  .kompetenz-split{ grid-template-columns:1fr; gap:40px; }
  .leist-grid, .leist-grid.cols-2, .leist-grid.cols-3, .leist-grid.cols-4{ grid-template-columns:1fr 1fr; }
  .kontakt-inner{ grid-template-columns:1fr; }
  .ref-card{ grid-template-columns:1fr; }
  .ref-grid-3{ grid-template-columns:1fr; }
  .ref-media{ height:200px; }
  .strip .wrap{ flex-direction:column; }
  .strip .stat{ border-left:none; border-top:1px solid var(--line-soft); padding-left:0; }
  .strip .stat:first-child{ border-top:none; }
}
@media (max-width: 560px){
  .leist-grid, .leist-grid.cols-2, .leist-grid.cols-3, .leist-grid.cols-4{ grid-template-columns:1fr; }
  .leist-group-head{ flex-direction:column; }
  section{ padding:60px 0; }
  .hero-actions .btn{ flex:1 1 auto; justify-content:center; }
  .brand-full{ height:38px; }
}

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

/* Lightbox */
.lightbox{
  position:fixed; inset:0;
  background:rgba(10,16,32,.94);
  display:flex;
  align-items:center;
  justify-content:center;
  opacity:0;
  visibility:hidden;
  transition:opacity .3s ease;
  z-index:1000;
  padding:40px;
}
.lightbox.is-open{ opacity:1; visibility:visible; }
.lightbox-figure{
  margin:0;
  max-width:min(1000px, 88vw);
  max-height:88vh;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:14px;
}
.lightbox-img{
  max-width:100%;
  max-height:80vh;
  display:block;
  border-radius:2px;
  box-shadow:0 20px 60px rgba(0,0,0,.5);
}
.lightbox-counter{
  font-family:var(--mono);
  font-weight:600;
  font-size:13px;
  letter-spacing:.04em;
  color:#AFC0DD;
}
.lightbox-close{
  position:absolute;
  top:20px; right:24px;
  background:none;
  border:none;
  color:var(--white);
  font-size:34px;
  line-height:1;
  cursor:pointer;
  padding:6px 10px;
  opacity:.8;
  transition:opacity .2s ease;
}
.lightbox-close:hover{ opacity:1; }
.lightbox-nav{
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.25);
  color:var(--white);
  font-size:30px;
  line-height:1;
  width:52px; height:52px;
  border-radius:50%;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:center;
  transition:background .2s ease;
  flex:none;
}
.lightbox-nav:hover{ background:rgba(255,255,255,.18); }
.lightbox-prev{ margin-right:24px; }
.lightbox-next{ margin-left:24px; }
@media (max-width:700px){
  .lightbox{ padding:16px; flex-direction:column; }
  .lightbox-nav{ width:44px; height:44px; font-size:24px; }
  .lightbox-prev{ margin-right:0; order:2; margin-top:16px; }
  .lightbox-next{ margin-left:0; order:2; margin-top:16px; }
  .lightbox-figure{ order:1; max-height:65vh; }
  .lightbox-close{ top:10px; right:14px; }
}