/* Layout: technisches Datenblatt – dunkle Stahlfläche, feine Linien, eine Prozesskette als roter Faden.
   Bewusst ein dunkles Erscheinungsbild passend zum metallischen Logo. */
:root {
  --ink: #0c1116;        /* Grundfläche, Anthrazit mit Blaustich */
  --plate: #131a21;      /* abgesetzte Flächen */
  --line: #25303a;       /* Haarlinien */
  --steel: #d5dbe1;      /* Haupttext, silbrig */
  --muted: #8d9aa7;      /* Nebentext */
  --petrol: #2f93cc;     /* Akzent aus dem Monogramm */
  --petrol-deep: #1b5f87;

  --f-display: "Bahnschrift", "DIN Alternate", "DIN 2014", "Barlow Condensed", "Roboto Condensed", "Arial Narrow", sans-serif;
  --f-body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --s-1: .8125rem; --s0: 1rem; --s1: 1.125rem; --s2: 1.5rem; --s3: 2.125rem; --s4: clamp(2.25rem, 5.2vw, 3.75rem);
  --wrap: 72rem;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--ink); }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0; background: var(--ink); color: var(--steel);
  font: 400 var(--s0)/1.65 var(--f-body);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--steel); text-decoration-color: var(--petrol); text-underline-offset: .2em; }
a:hover { color: #fff; }
:focus-visible { outline: 2px solid var(--petrol); outline-offset: 3px; }

.wrap {
  max-width: var(--wrap); margin: 0 auto;
  padding-left: max(20px, env(safe-area-inset-left, 0px));
  padding-right: max(20px, env(safe-area-inset-right, 0px));
}

h1, h2, h3 { font-family: var(--f-display); font-weight: 600; line-height: 1.1; margin: 0; text-wrap: balance; color: #eef1f4; letter-spacing: .005em; }
h1 { font-size: var(--s4); }
h2 { font-size: var(--s3); }
h3 { font-size: var(--s1); letter-spacing: .02em; }
p { margin: 0; }
.lead { font-size: var(--s1); color: var(--steel); max-width: 38rem; }
.eyebrow {
  font-family: var(--f-display); font-size: var(--s-1); text-transform: uppercase;
  letter-spacing: .16em; color: var(--petrol);
}
.muted { color: var(--muted); }

/* Kopfzeile */
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 10; background: var(--ink); }
.site-header {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 5;
  background: color-mix(in srgb, var(--ink) 88%, transparent);
  backdrop-filter: blur(8px); border-bottom: 1px solid var(--line);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-block: .75rem; }
.brand img { height: 56px; width: auto; }
.nav { display: flex; gap: clamp(.9rem, 2.4vw, 2rem); font-family: var(--f-display); font-size: .95rem; letter-spacing: .06em; text-transform: uppercase; }
.nav a { text-decoration: none; color: var(--muted); }
.nav a:hover { color: #fff; }
@media (max-width: 760px) { .nav .hide-sm { display: none; } .brand img { height: 34px; } }

/* Hero */
.hero { padding-block: clamp(3rem, 8vw, 6rem) clamp(2.5rem, 6vw, 4.5rem); border-bottom: 1px solid var(--line); position: relative; overflow: hidden; }
.hero::after { /* gebürstete Stahl-Anmutung, sehr zurückhaltend */
  content: ""; position: absolute; inset: 0; pointer-events: none; z-index: -1;
  background:
    radial-gradient(60rem 22rem at 85% -10%, rgba(47,147,204,.16), transparent 60%),
    repeating-linear-gradient(90deg, rgba(255,255,255,.012) 0 1px, transparent 1px 3px);
}
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.hero-copy { display: grid; gap: 1.4rem; min-width: 0; }
@media (max-width: 820px) { .hero-grid { grid-template-columns: 1fr; } }
.actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: .4rem; }
.btn {
  display: inline-flex; align-items: center; gap: .5rem; padding: .8rem 1.25rem;
  font-family: var(--f-display); font-size: 1rem; letter-spacing: .06em; text-transform: uppercase;
  text-decoration: none; border-radius: 2px; border: 1px solid var(--line); color: var(--steel);
}
.btn-primary { background: linear-gradient(180deg, var(--petrol), var(--petrol-deep)); border-color: var(--petrol); color: #fff; }
.btn-primary:hover { filter: brightness(1.08); color: #fff; }
.btn:not(.btn-primary):hover { border-color: var(--muted); }

/* Prozesskette */
.chain { margin-top: clamp(2.5rem, 6vw, 4rem); }
.chain ol {
  list-style: none; margin: .9rem 0 0; padding: 0;
  display: grid; grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}
.chain li { position: relative; padding: 1rem .9rem 0 0; min-width: 0; }
.chain li::before { content: ""; position: absolute; top: -5px; left: 0; width: 9px; height: 9px; border-radius: 50%; background: var(--ink); border: 2px solid var(--petrol); }
.chain b { display: block; font-family: var(--f-display); font-weight: 600; font-size: 1.02rem; color: #eef1f4; letter-spacing: .02em; }
.chain span { font-size: .85rem; color: var(--muted); }
@media (max-width: 760px) {
  .chain ol { grid-template-columns: 1fr; border-top: 0; border-left: 1px solid var(--line); margin-left: 4px; }
  .chain li { padding: 0 0 1rem 1.2rem; }
  .chain li::before { top: .35rem; left: -5px; }
}

/* Abschnitte */
section.block { padding-block: clamp(3.5rem, 8vw, 6rem); border-bottom: 1px solid var(--line); scroll-margin-top: 4rem; }
.block-head { display: grid; gap: .8rem; margin-bottom: clamp(2rem, 4vw, 3rem); max-width: 44rem; }

/* Leistungen */
.pillars { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); }
@media (max-width: 760px) { .pillars { grid-template-columns: 1fr; } }
.pillar { background: var(--plate); padding: clamp(1.4rem, 3vw, 2rem); display: grid; gap: .9rem; align-content: start; min-width: 0; }
.pillar .tag { font-family: var(--f-display); font-size: var(--s-1); color: var(--petrol); letter-spacing: .14em; text-transform: uppercase; }
.pillar ul { margin: 0; padding: 0; list-style: none; display: grid; gap: .45rem; }
.pillar li { padding-left: 1.1rem; position: relative; color: var(--steel); font-size: .97rem; }
.pillar li::before { content: ""; position: absolute; left: 0; top: .72em; width: .5rem; height: 1px; background: var(--petrol); }
.note { font-size: .85rem; color: var(--muted); border-top: 1px solid var(--line); padding-top: .8rem; }

/* Zielgruppen */
.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); gap: clamp(2rem, 5vw, 4rem); }
@media (max-width: 820px) { .split { grid-template-columns: 1fr; } }
.targets { margin: 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 2rem; }
@media (max-width: 560px) { .targets { grid-template-columns: 1fr; } }
.targets li { padding: .9rem 0; border-bottom: 1px solid var(--line); display: grid; gap: .15rem; }
.targets b { font-weight: 600; color: #eef1f4; }
.targets span { font-size: .9rem; color: var(--muted); }

/* Ablauf */
.steps { margin: 0; padding: 0; list-style: none; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: clamp(1.25rem, 3vw, 2.5rem); counter-reset: s; }
@media (max-width: 760px) { .steps { grid-template-columns: 1fr; } }
.steps li { counter-increment: s; display: grid; gap: .6rem; align-content: start; border-top: 2px solid var(--petrol); padding-top: 1rem; }
.steps li::before { content: attr(data-step); font-family: var(--f-display); font-size: var(--s-1); letter-spacing: .14em; text-transform: uppercase; color: var(--muted); }
.models { margin-top: clamp(2.5rem, 5vw, 3.5rem); display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); border: 1px solid var(--line); }
@media (max-width: 820px) { .models { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 460px) { .models { grid-template-columns: 1fr; } }
.models div { padding: 1.1rem 1.2rem; border-right: 1px solid var(--line); display: grid; gap: .35rem; align-content: start; }
.models div:last-child { border-right: 0; }
@media (max-width: 820px) { .models div { border-bottom: 1px solid var(--line); } }
.models b { font-family: var(--f-display); font-weight: 600; color: #eef1f4; letter-spacing: .02em; }
.models span { font-size: .88rem; color: var(--muted); }

/* Profil */
.facts { margin: 0; padding: 0; list-style: none; display: grid; gap: 0; border-top: 1px solid var(--line); }
.facts li { display: grid; grid-template-columns: 9.5rem minmax(0, 1fr); gap: 1rem; padding: .85rem 0; border-bottom: 1px solid var(--line); }
@media (max-width: 460px) { .facts li { grid-template-columns: 1fr; gap: .1rem; } }
.facts dt, .facts .k { font-family: var(--f-display); font-size: var(--s-1); letter-spacing: .12em; text-transform: uppercase; color: var(--muted); padding-top: .2rem; }
.profile-copy { display: grid; gap: 1rem; max-width: 36rem; }

/* Kontakt */
.contact { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(2rem, 5vw, 4rem); align-items: start; }
@media (max-width: 760px) { .contact { grid-template-columns: 1fr; } }
.contact-card { border: 1px solid var(--line); background: var(--plate); padding: clamp(1.4rem, 3vw, 2rem); display: grid; gap: 1.1rem; }
.contact-row { display: grid; gap: .1rem; }
.contact-row a, .contact-row p { font-size: var(--s1); color: #eef1f4; word-break: break-word; }

/* Fußzeile */
.site-footer { padding-block: 2rem; font-size: .88rem; color: var(--muted); }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem; }
.site-footer nav { display: flex; gap: 1.5rem; }
.site-footer a { color: var(--muted); }

/* Rechtstexte */
.legal { padding-block: clamp(3rem, 7vw, 5rem); }
.legal .wrap > * { max-width: 46rem; }
.legal h1 { font-size: var(--s3); margin-bottom: 2rem; }
.legal h2 { font-size: var(--s1); margin: 2.2rem 0 .6rem; color: #eef1f4; }
.legal p, .legal li { color: var(--steel); margin: 0 0 .8rem; }
.legal ul { padding-left: 1.2rem; }

/* Sprachumschalter */
.header-right { display: flex; align-items: center; gap: clamp(.9rem, 2.4vw, 2rem); }
.lang { display: flex; gap: .15rem; font-family: var(--f-display); font-size: .82rem; letter-spacing: .08em; border-left: 1px solid var(--line); padding-left: clamp(.7rem, 2vw, 1.4rem); }
.lang a { text-decoration: none; color: var(--muted); padding: .2rem .35rem; border-radius: 2px; }
.lang a[aria-current="true"] { color: #fff; background: var(--plate); outline: 1px solid var(--line); }
.lang a:hover { color: #fff; }
@media (max-width: 520px) { .nav { display: none; } }

/* Netzwerk: zwei Standorte, verbunden durch eine Linie */
.partners { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(1.5rem, 4vw, 3.5rem); position: relative; }
.partners::before { content: ""; position: absolute; left: 50%; top: 0; bottom: 0; width: 1px; background: linear-gradient(var(--petrol), transparent); }
@media (max-width: 760px) { .partners { grid-template-columns: 1fr; } .partners::before { display: none; } }
.partner { display: grid; gap: .8rem; align-content: start; min-width: 0; border-top: 1px solid var(--line); padding-top: 1.2rem; }
.partner .tag { font-family: var(--f-display); font-size: var(--s2); font-weight: 600; color: #eef1f4; letter-spacing: .02em; }
.partner h3 { font-family: var(--f-display); font-size: var(--s-1); font-weight: 500; letter-spacing: .14em; text-transform: uppercase; color: var(--petrol); }
.partner ul { margin: 0; padding: 0; list-style: none; display: grid; gap: .45rem; }
.partner li { padding-left: 1.1rem; position: relative; font-size: .97rem; }
.partner li::before { content: ""; position: absolute; left: 0; top: .72em; width: .5rem; height: 1px; background: var(--petrol); }


/* Technische Hintergründe */
.hero::before { /* Konstruktionsraster */
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background-image:
    linear-gradient(rgba(143,185,214,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(143,185,214,.05) 1px, transparent 1px);
  background-size: 32px 32px;
  -webkit-mask-image: radial-gradient(70% 90% at 75% 40%, #000 30%, transparent 75%);
          mask-image: radial-gradient(70% 90% at 75% 40%, #000 30%, transparent 75%);
}
.hero-visual { position: relative; justify-self: end; width: min(100%, 420px); aspect-ratio: 1; max-width: 100%; display: grid; place-items: center; }
.hero-visual .gear { position: absolute; opacity: .22; }
.gear-l { width: 92%; left: 0; top: 4%; animation: spin 90s linear infinite; }
.gear-s { width: 46%; right: -14%; bottom: -6%; animation: spin 45s linear infinite reverse; opacity: .16 !important; }
.hero-mark { position: relative; width: 62%; margin-left: -8%; filter: drop-shadow(0 20px 40px rgba(0,0,0,.6)); }
.dim { position: absolute; font: 500 .7rem/1 ui-monospace, "SFMono-Regular", Consolas, monospace; letter-spacing: .08em; color: var(--muted); opacity: .7; white-space: nowrap; }
.dim-a { top: 0; left: 4%; border-bottom: 1px solid var(--line); padding-bottom: .3rem; }
.dim-b { bottom: 2%; right: -6%; }
@keyframes spin { to { transform: rotate(360deg); } }
@media (max-width: 820px) { .hero-visual { display: none; } }

#leistungen, #netzwerk, #kontakt { position: relative; isolation: isolate; }
#leistungen::before { /* Leiterbahnen */
  content: ""; position: absolute; top: 0; right: 0; width: min(46rem, 60%); height: 26rem; z-index: -1; pointer-events: none;
  background: url("../img/circuit.svg") 0 0 / 160px 160px repeat; opacity: .14;
  -webkit-mask-image: radial-gradient(100% 100% at 100% 0, #000, transparent 70%);
          mask-image: radial-gradient(100% 100% at 100% 0, #000, transparent 70%);
}
.partners::after { /* Datenimpuls zwischen beiden Standorten */
  content: ""; position: absolute; left: calc(50% - 3px); top: 0; width: 7px; height: 7px; border-radius: 50%;
  background: var(--petrol); box-shadow: 0 0 12px 3px rgba(47,147,204,.6);
  animation: pulse-travel 4.5s ease-in-out infinite;
}
@keyframes pulse-travel { 0% { top: 0; opacity: 0; } 15% { opacity: 1; } 85% { opacity: 1; } 100% { top: 100%; opacity: 0; } }
@media (max-width: 760px) { .partners::after { display: none; } }
#kontakt::before { /* großes Zahnrad als Wasserzeichen */
  content: ""; position: absolute; left: -9rem; bottom: -11rem; width: 26rem; height: 26rem; z-index: -1; pointer-events: none;
  background: url("../img/gear-large.svg") center / contain no-repeat; opacity: .07;
  animation: spin 120s linear infinite;
}
.steps li { position: relative; }
.steps li::after { /* Statusleuchte wie an einer Steuerung */
  content: ""; position: absolute; top: -5px; right: 0; width: 8px; height: 8px; border-radius: 50%;
  background: var(--petrol); box-shadow: 0 0 8px rgba(47,147,204,.8); animation: blink 2.4s steps(1) infinite;
}
.steps li:nth-child(2)::after { animation-delay: .8s; }
.steps li:nth-child(3)::after { animation-delay: 1.6s; }
@keyframes blink { 0%, 60% { opacity: 1; } 61%, 100% { opacity: .25; } }
@media (prefers-reduced-motion: reduce) {
  .gear-l, .gear-s, #kontakt::before, .partners::after, .steps li::after { animation: none; }
}