/* Layout: Netzplan – helle Fläche, feine Leitungslinien in Blau, Kupfer als einziger Akzent (wie Kupferkabel im Patchfeld). */
:root {
  --paper: #F6F9FC;
  --paper-2: #EAF1F9;
  --surface: #FFFFFF;
  --ink: #12283F;
  --ink-soft: #4A6380;
  --line: #2B5C99;
  --line-soft: rgba(43, 92, 153, 0.18);
  --copper: #B85F26;
  --copper-ink: #FFFFFF;
  --ok: #2F7D4F;
  --err: #B3261E;

  --f-display: 'Archivo', 'Arial Narrow', 'Helvetica Neue', Arial, sans-serif;
  --f-body: 'Source Sans 3', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  --f-mono: 'JetBrains Mono', ui-monospace, 'SFMono-Regular', Menlo, Consolas, monospace;

  --s-1: 0.25rem; --s-2: 0.5rem; --s-3: 0.75rem; --s-4: 1rem; --s-5: 1.5rem; --s-6: 2rem; --s-7: 3rem; --s-8: 4.5rem;
  --wrap: 72rem;
  --radius: 6px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #0B1A2E; --paper-2: #10233D; --surface: #132A47;
    --ink: #EAF2FF; --ink-soft: #A3BAD8;
    --line: #8FB8EE; --line-soft: rgba(143, 184, 238, 0.18);
    --copper: #E99A5C; --copper-ink: #1A0F02;
    --ok: #6CC895; --err: #FF8A80;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #0B1A2E; --paper-2: #10233D; --surface: #132A47;
  --ink: #EAF2FF; --ink-soft: #A3BAD8;
  --line: #8FB8EE; --line-soft: rgba(143, 184, 238, 0.18);
  --copper: #E99A5C; --copper-ink: #1A0F02;
  --ok: #6CC895; --err: #FF8A80;
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--f-body);
  font-size: 1.0625rem;
  line-height: 1.6;
}
img, svg { max-width: 100%; }
a { color: var(--line); text-underline-offset: 0.18em; }
a:hover { color: var(--copper); }
:focus-visible { outline: 2px solid var(--copper); outline-offset: 3px; border-radius: 2px; }
h1, h2, h3 { font-family: var(--f-display); line-height: 1.12; text-wrap: balance; margin: 0; font-stretch: 85%; }
h1 { font-size: clamp(2.1rem, 5vw, 3.4rem); font-weight: 800; letter-spacing: -0.01em; }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.2rem); font-weight: 750; }
h3 { font-size: 1.25rem; font-weight: 700; font-stretch: 90%; }
p { margin: 0; }
.wrap { max-width: var(--wrap); margin-inline: auto; padding-inline: max(16px, 4vw); }
.label {
  font-family: var(--f-mono); font-size: 0.78rem; font-weight: 500;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--copper);
}
.lead { font-size: 1.2rem; color: var(--ink-soft); max-width: 38em; }
.prose { max-width: 42em; display: grid; gap: var(--s-4); }
.prose h2 { margin-top: var(--s-5); font-size: 1.45rem; }
.prose h3 { margin-top: var(--s-3); font-size: 1.1rem; }
.prose ul { margin: 0; padding-left: 1.2em; display: grid; gap: var(--s-1); }

/* Kopf */
.site-head {
  position: sticky; top: env(safe-area-inset-top, 0px); z-index: 10;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line-soft);
}
.site-head .wrap { display: flex; align-items: center; justify-content: space-between; gap: var(--s-4); padding-block: var(--s-3); flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: var(--s-2); color: var(--ink); text-decoration: none; }
.brand svg { width: 2rem; height: 2rem; flex: none; }
.brand-name { font-family: var(--f-display); font-weight: 800; font-size: 1.35rem; font-stretch: 80%; letter-spacing: 0.01em; }
.brand-name small { font-family: var(--f-body); font-weight: 600; font-size: 0.8rem; color: var(--ink-soft); margin-left: 0.2em; font-stretch: 100%; }
.nav { display: flex; flex-wrap: wrap; gap: var(--s-1) var(--s-4); font-weight: 600; }
.nav a { color: var(--ink); text-decoration: none; padding-block: var(--s-1); border-bottom: 2px solid transparent; }
.nav a:hover { color: var(--copper); }
.nav a[aria-current="page"] { border-bottom-color: var(--copper); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: var(--s-2);
  font: 700 1rem/1 var(--f-body); text-decoration: none; cursor: pointer;
  padding: 0.85rem 1.3rem; border-radius: var(--radius); border: 2px solid var(--copper);
  background: var(--copper); color: var(--copper-ink);
}
.btn:hover { color: var(--copper-ink); filter: brightness(1.08); }
.btn.ghost { background: transparent; color: var(--ink); border-color: var(--line-soft); }
.btn.ghost:hover { border-color: var(--line); color: var(--ink); }
.btn[disabled] { opacity: 0.6; cursor: progress; }
.actions { display: flex; flex-wrap: wrap; gap: var(--s-3); }

/* Abschnitte */
section { padding-block: var(--s-8); }
section + section { border-top: 1px solid var(--line-soft); }
.sec-head { display: grid; gap: var(--s-3); margin-bottom: var(--s-6); max-width: 44em; }
.sec-head p { color: var(--ink-soft); }

/* Hero */
.hero { padding-block: var(--s-7) var(--s-8); }
.hero .wrap { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: var(--s-7); align-items: center; }
.hero-text { display: grid; gap: var(--s-5); min-width: 0; }
.hero-text h1 em { font-style: normal; color: var(--copper); }
.netmap { width: 100%; height: auto; display: block; }
.netmap .grid { stroke: var(--line-soft); stroke-width: 1; fill: none; }
.netmap .wire { stroke: var(--line); stroke-width: 2; fill: none; }
.netmap .wire.copper { stroke: var(--copper); stroke-dasharray: 6 5; }
.netmap .node { fill: var(--surface); stroke: var(--line); stroke-width: 2; }
.netmap .node.hub { fill: var(--copper); stroke: var(--copper); }
.netmap .code { font: 600 15px var(--f-mono); fill: var(--ink); letter-spacing: 0.06em; }
.netmap .name { font: 400 12px var(--f-body); fill: var(--ink-soft); }
.netmap .hubtext { font: 700 12px var(--f-mono); fill: var(--copper-ink); letter-spacing: 0.08em; }

/* Leistungs-Raster */
.services { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 1px; background: var(--line-soft); border: 1px solid var(--line-soft); border-radius: var(--radius); overflow: hidden; }
.service { background: var(--paper); padding: var(--s-5); display: grid; gap: var(--s-2); align-content: start; min-width: 0; }
.service svg { width: 1.75rem; height: 1.75rem; stroke: var(--line); fill: none; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.service p { color: var(--ink-soft); }
a.service { text-decoration: none; color: inherit; }
a.service:hover { background: var(--surface); }
a.service:hover h3 { color: var(--copper); }
.service-more { background: var(--paper-2); display: flex; align-items: center; }

/* Zielgruppen */
.audience { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--s-6); }
.audience > div { display: grid; gap: var(--s-2); align-content: start; border-top: 2px solid var(--line); padding-top: var(--s-4); }
.audience p { color: var(--ink-soft); }

/* Ablauf */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--s-5); counter-reset: step; }
.steps li { counter-increment: step; display: grid; gap: var(--s-2); align-content: start; position: relative; padding-top: var(--s-6); }
.steps li::before {
  content: counter(step); position: absolute; top: 0; left: 0;
  width: 2rem; height: 2rem; border-radius: 50%; display: grid; place-items: center;
  font: 600 0.9rem var(--f-mono); color: var(--line); background: var(--paper); border: 2px solid var(--line);
}
.steps li:not(:last-child)::after { content: ""; position: absolute; top: 1rem; left: 2.4rem; right: calc(-1 * var(--s-5) + 0.4rem); border-top: 2px dashed var(--line-soft); }
.steps p { color: var(--ink-soft); }

/* Region-Band */
.region { background: var(--paper-2); }
.region .wrap { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: var(--s-6); align-items: center; }
.plates { display: flex; flex-wrap: wrap; gap: var(--s-3); }
.plate {
  font: 700 1.4rem/1 var(--f-display); font-stretch: 75%; letter-spacing: 0.06em; color: #12283F;
  background: #FFFFFF; border: 2px solid #12283F; border-radius: 4px; padding: 0.45rem 0.8rem 0.45rem 0.55rem;
  display: inline-flex; align-items: center; gap: 0.55rem;
}
.plate::before { content: "D"; font: 600 0.65rem/1 var(--f-body); color: #FFFFFF; background: #1F4FA3; align-self: stretch; display: grid; place-items: end center; padding: 0 0.25rem 0.15rem; margin-block: -0.45rem; margin-left: -0.55rem; border-radius: 2px 0 0 2px; }

/* CTA */
.cta .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: var(--s-5); }
.cta h2 { max-width: 22em; }

/* Seitenkopf Unterseiten */
.page-head { padding-block: var(--s-7) var(--s-6); border-bottom: 1px solid var(--line-soft); }
.page-head .wrap { display: grid; gap: var(--s-3); }

/* Leistungen Detail */
.detail { display: grid; grid-template-columns: minmax(0, 16rem) minmax(0, 1fr); gap: var(--s-6); padding-block: var(--s-6); border-bottom: 1px solid var(--line-soft); scroll-margin-top: 5rem; }
.detail:last-child { border-bottom: 0; }
.detail-title { display: grid; gap: var(--s-2); align-content: start; }
.detail-title svg { width: 2rem; height: 2rem; stroke: var(--line); fill: none; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }
.detail-body { display: grid; gap: var(--s-3); max-width: 42em; }
.detail-body ul { margin: 0; padding-left: 1.2em; display: grid; gap: var(--s-1); }
.tags { display: flex; flex-wrap: wrap; gap: var(--s-2); }
.tag { font: 500 0.78rem var(--f-mono); color: var(--ink-soft); border: 1px solid var(--line-soft); border-radius: 3px; padding: 0.15rem 0.45rem; }

/* Kontakt */
.contact { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: var(--s-7); align-items: start; }
form { display: grid; gap: var(--s-4); }
.row2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--s-4); }
.field { display: grid; gap: var(--s-1); min-width: 0; }
.field label { font-weight: 600; font-size: 0.95rem; }
.field .opt { font-weight: 400; color: var(--ink-soft); }
input, select, textarea {
  font: inherit; color: var(--ink); background: var(--surface);
  border: 1px solid color-mix(in srgb, var(--line) 40%, transparent); border-radius: var(--radius);
  padding: 0.65rem 0.75rem; width: 100%;
}
textarea { min-height: 9rem; resize: vertical; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--copper); outline-offset: 0; border-color: transparent; }
.check { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: var(--s-3); align-items: start; font-size: 0.95rem; color: var(--ink-soft); }
.check input { width: 1.15rem; height: 1.15rem; margin-top: 0.2rem; accent-color: var(--copper); }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.notice { padding: var(--s-3) var(--s-4); border-radius: var(--radius); border: 1px solid currentColor; font-weight: 600; }
.notice.ok { color: var(--ok); }
.notice.err { color: var(--err); }
.aside { display: grid; gap: var(--s-5); border-left: 2px solid var(--line); padding-left: var(--s-5); }
.aside dl { margin: 0; display: grid; gap: var(--s-3); }
.aside dt { font: 500 0.78rem var(--f-mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-soft); }
.aside dd { margin: 0; font-weight: 600; }

.todo { background: color-mix(in srgb, var(--copper) 18%, transparent); padding: 0 0.3em; border-radius: 3px; font-weight: 600; }

/* Fuß */
.site-foot { border-top: 1px solid var(--line-soft); background: var(--paper-2); padding-block: var(--s-6); font-size: 0.95rem; color: var(--ink-soft); }
.site-foot .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--s-4); }
.site-foot nav { display: flex; flex-wrap: wrap; gap: var(--s-4); }
.site-foot a { color: var(--ink-soft); }

@media (max-width: 1040px) { .services { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 860px) {
  .hero .wrap, .contact, .region .wrap, .detail { grid-template-columns: minmax(0, 1fr); }
  .hero .wrap { gap: var(--s-6); }
  .netmap { max-width: 26rem; }
  .audience { grid-template-columns: minmax(0, 1fr); gap: var(--s-5); }
  .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .steps li::after { display: none; }
  section { padding-block: var(--s-7); }
}
@media (max-width: 520px) {
  .steps, .row2, .services { grid-template-columns: minmax(0, 1fr); }
  .nav { gap: var(--s-1) var(--s-3); font-size: 0.95rem; }
}
@media (prefers-reduced-motion: reduce) { * { scroll-behavior: auto !important; transition: none !important; } }

/* Zammad-Kontaktformular (form.js, noCSS) */
.zammad-form-group { display: grid; gap: var(--s-1); min-width: 0; }
.zammad-form-group > label { font-weight: 600; font-size: 0.95rem; }
.zammad-form-group label:has(> input[type="checkbox"]) { display: grid; grid-template-columns: auto minmax(0, 1fr); gap: var(--s-3); align-items: start; font-weight: 400; color: var(--ink-soft); }
.zammad-form-group input[type="checkbox"] { width: 1.15rem; height: 1.15rem; margin-top: 0.2rem; accent-color: var(--copper); }
.zammad-form .has-error .zammad-form-control { border-color: var(--err); }
.zammad-form button[disabled] { opacity: 0.6; cursor: progress; }
.zammad-form-thankyou { padding: var(--s-3) var(--s-4); border-radius: var(--radius); border: 1px solid currentColor; font-weight: 600; color: var(--ok); }