:root {
  --blau: #2F5D8C;
  --blau-dunkel: #244a70;
  --blau-hell: #e8eff7;
  --anthrazit: #1E2933;
  --grau: #5B6673;
  --linie: #dfe5ec;
  --flaeche: #f4f6f9;
  --weiss: #fff;
  --rot: #b42318;
  --rot-hell: #fdecea;
  --radius: 14px;
  --schatten: 0 1px 2px rgba(30, 41, 51, .06), 0 8px 24px rgba(30, 41, 51, .07);
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--anthrazit);
  background: var(--flaeche);
}

* { box-sizing: border-box; }
body { margin: 0; line-height: 1.55; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; }
a { color: var(--blau); }
h1, h2, h3 { line-height: 1.2; margin: 0; }

/* Kopf */
.kopf {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1120px; margin: 0 auto; padding: 20px 24px;
}
.kopf-logo img { display: block; width: 160px; }
.kopf nav { display: flex; align-items: center; gap: 22px; }
.kopf nav a:not(.knopf) { color: var(--grau); text-decoration: none; font-weight: 500; }
.kopf nav a:not(.knopf):hover { color: var(--anthrazit); }

/* Knöpfe */
.knopf {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 20px; border-radius: 10px; border: 1px solid var(--blau);
  background: var(--blau); color: #fff; font-weight: 600; text-decoration: none;
  font: inherit; font-weight: 600; cursor: pointer; white-space: nowrap;
  transition: background .15s;
}
.knopf:hover { background: var(--blau-dunkel); }
.knopf-hell { background: var(--weiss); color: var(--blau); border-color: var(--linie); }
.knopf-hell:hover { background: var(--blau-hell); }
.knopf-klein { padding: 8px 16px; }

/* Einstieg */
.einstieg { max-width: 760px; margin: 24px auto 0; padding: 0 24px; text-align: center; }
.einstieg h1 { font-size: clamp(28px, 4.4vw, 44px); letter-spacing: -.02em; font-weight: 750; }
.unterzeile { color: var(--grau); font-size: 18px; margin: 16px 0 0; }

/* Netz: Logo in der Mitte, Programme drumherum */
.netz {
  position: relative; max-width: 1120px; margin: 48px auto 0; padding: 24px;
  display: grid; grid-template-columns: 1fr 210px 1fr; grid-template-rows: auto auto;
  column-gap: 88px; row-gap: 64px; align-items: center;
}
.linien { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; overflow: visible; }
.linien path { fill: none; stroke-linecap: round; transition: stroke .2s, opacity .2s; }
.linien .grund { stroke: #c9d4e0; stroke-width: 2; }
.linien .fluss { stroke: var(--blau); stroke-width: 2; stroke-dasharray: 2 14; opacity: .8; animation: fliessen 1.6s linear infinite; }
.linien .aktiv.grund { stroke: var(--blau); stroke-width: 2.5; }
.linien .aktiv.fluss { stroke: #fff; opacity: 1; stroke-width: 2.5; }
@keyframes fliessen { to { stroke-dashoffset: -16; } }

.mitte { grid-column: 2; grid-row: 1 / span 2; position: relative; z-index: 1; }
.mitte-karte {
  display: flex; flex-direction: column; align-items: center; gap: 10px; text-align: center;
  background: var(--weiss); border-radius: 28px; padding: 32px 20px 28px; box-shadow: var(--schatten);
  border: 1px solid var(--linie);
}
.mitte-karte img { width: 72px; filter: drop-shadow(0 6px 14px rgba(47, 93, 140, .35)); }
.mitte-name { font-size: 28px; color: var(--grau); letter-spacing: -.02em; }
.mitte-name b { color: var(--anthrazit); font-weight: 800; }
.mitte-zusatz { font-size: 14px; color: var(--grau); }

.tool {
  position: relative; z-index: 1; display: flex; align-items: center; gap: 14px; text-align: left;
  background: var(--weiss); border: 1px solid var(--linie); border-radius: var(--radius);
  padding: 18px 20px; box-shadow: var(--schatten); cursor: pointer; font: inherit; color: inherit;
  transition: transform .15s, border-color .15s, box-shadow .15s;
}
.tool:hover, .tool:focus-visible { transform: translateY(-2px); border-color: var(--blau); outline: none; box-shadow: 0 0 0 3px var(--blau-hell), var(--schatten); }
.pos-a { grid-column: 1; grid-row: 1; }
.pos-b { grid-column: 3; grid-row: 1; }
.pos-c { grid-column: 1; grid-row: 2; }
.pos-d { grid-column: 3; grid-row: 2; }
.tool-icon {
  flex: none; width: 48px; height: 48px; border-radius: 12px; background: var(--blau-hell);
  display: grid; place-items: center;
}
.tool-icon svg { width: 26px; height: 26px; fill: none; stroke: var(--blau); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.tool-text { display: flex; flex-direction: column; min-width: 0; }
.tool { min-height: 92px; }
.tool-text b { font-size: 17px; }
.tool-text small { color: var(--grau); font-size: 14px; }
.tool::after { content: "›"; margin-left: auto; color: var(--grau); font-size: 24px; line-height: 1; padding-left: 8px; }

/* Vorteile */
.vorteile {
  max-width: 1040px; margin: 72px auto 0; padding: 0 24px;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.vorteile div { border-top: 3px solid var(--blau); padding-top: 14px; }
.vorteile h3 { font-size: 16px; }
.vorteile p { margin: 6px 0 0; color: var(--grau); font-size: 15px; }

/* Blöcke */
.block { max-width: 1040px; margin: 80px auto 0; padding: 0 24px; }
.block h2 { font-size: 28px; letter-spacing: -.01em; }
.block-intro { color: var(--grau); max-width: 680px; margin: 10px 0 24px; }
.preisliste { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.preis {
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  background: var(--weiss); border: 1px solid var(--linie); border-radius: var(--radius);
  padding: 18px 20px; font: inherit; color: inherit; cursor: pointer; text-align: left;
}
.preis:hover { border-color: var(--blau); }
.preis b { color: var(--blau); white-space: nowrap; }

.kontakt-karte {
  display: flex; align-items: center; gap: 16px; flex-wrap: wrap;
  background: var(--anthrazit); color: #fff; border-radius: 20px; padding: 28px;
}
.kontakt-karte div { display: flex; flex-direction: column; margin-right: auto; }
.kontakt-karte b { font-size: 20px; }
.kontakt-karte span { color: #b8c2cc; }
.kontakt-karte .knopf-hell { background: transparent; color: #fff; border-color: #5B6673; }
.kontakt-karte .knopf-hell:hover { background: #2a3744; }

.fuss {
  max-width: 1040px; margin: 80px auto 0; padding: 24px; border-top: 1px solid var(--linie);
  display: flex; gap: 20px; color: var(--grau); font-size: 14px;
}
.fuss span { margin-right: auto; }
.fuss a { color: var(--grau); }

/* Detail-Fenster */
.detail {
  width: min(760px, calc(100% - 24px)); max-height: calc(100% - 32px); padding: 0;
  border: 0; border-radius: 20px; box-shadow: 0 24px 64px rgba(30, 41, 51, .3); color: inherit;
}
.detail::backdrop { background: rgba(30, 41, 51, .55); backdrop-filter: blur(3px); }
.detail[open] { animation: auf .18s ease-out; }
@keyframes auf { from { opacity: 0; transform: translateY(12px); } }
.detail-inhalt { position: relative; padding: 32px; }
.schliessen {
  position: absolute; top: 14px; right: 14px; width: 40px; height: 40px; border-radius: 50%;
  border: 0; background: var(--flaeche); font-size: 26px; line-height: 1; cursor: pointer; color: var(--grau);
}
.schliessen:hover { background: var(--linie); color: var(--anthrazit); }
.detail-marke { margin: 0; color: var(--blau); font-weight: 700; font-size: 13px; letter-spacing: .08em; text-transform: uppercase; }
.detail h2 { font-size: 28px; margin-top: 4px; }
.detail-lead { color: var(--grau); font-size: 17px; margin: 10px 0 20px; }
.detail-bild { display: block; border-radius: 12px; border: 1px solid var(--linie); }
.liste { list-style: none; padding: 0; margin: 22px 0 0; display: grid; gap: 8px; }
.liste li { padding-left: 28px; position: relative; }
.liste li::before {
  content: ""; position: absolute; left: 4px; top: .45em; width: 12px; height: 7px;
  border-left: 2.5px solid var(--blau); border-bottom: 2.5px solid var(--blau); transform: rotate(-45deg);
}
.detail-fuss {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  margin-top: 26px; padding-top: 22px; border-top: 1px solid var(--linie);
}
.detail-preis { display: flex; flex-direction: column; margin-right: auto; }
.detail-preis span { font-size: 13px; color: var(--grau); }
.detail-preis b { font-size: 20px; color: var(--blau); }
.detail-preis small { color: var(--grau); }

/* Mail-Check Beispiel */
.mail-muster { display: grid; grid-template-columns: 1.1fr 1fr; gap: 0; border: 1px solid var(--linie); border-radius: 12px; overflow: hidden; font-size: 14px; }
.mail-muster-mail { padding: 18px; background: var(--weiss); display: flex; flex-direction: column; gap: 6px; }
.mail-muster-mail small { color: var(--grau); }
.mail-muster-mail p { margin: 0; color: var(--grau); }
.mail-muster-link { align-self: flex-start; margin-top: 4px; background: #0f6cbd; color: #fff; padding: 6px 12px; border-radius: 4px; }
.mail-muster-ergebnis { padding: 18px; background: var(--flaeche); border-left: 1px solid var(--linie); }
.ampel-rot { display: block; background: var(--rot-hell); color: var(--rot); border: 1px solid var(--rot); border-radius: 8px; padding: 8px 10px; font-weight: 700; }
.mail-muster-ergebnis ul { margin: 10px 0; padding-left: 18px; }

/* Rechtstexte */
.text { max-width: 760px; margin: 24px auto 0; padding: 32px; background: var(--weiss); border-radius: 20px; border: 1px solid var(--linie); }
.text h1 { font-size: 30px; margin-bottom: 20px; }
.text h2 { font-size: 19px; margin: 28px 0 8px; }
.text p, .text li { color: #34404c; }

/* Handy */
@media (max-width: 820px) {
  .kopf { padding: 16px; }
  .kopf-logo img { width: 132px; }
  .einstieg, .block, .vorteile { padding-left: 16px; padding-right: 16px; }
  .unterzeile { font-size: 16px; }
  .netz { grid-template-columns: 1fr; grid-template-rows: none; row-gap: 14px; padding: 16px; margin-top: 32px; }
  .mitte { grid-column: 1; grid-row: auto; margin: 0 auto 26px; width: 220px; }
  .mitte-karte { padding: 22px 16px 20px; }
  .tool { grid-column: 1; grid-row: auto; margin-left: 30px; padding: 14px 16px; }
  .tool-icon { width: 42px; height: 42px; }
  .vorteile { grid-template-columns: 1fr 1fr; margin-top: 56px; }
  .preisliste { grid-template-columns: 1fr; }
  .preis { flex-direction: column; align-items: flex-start; gap: 2px; }
  .kontakt-karte { padding: 22px; }
  .kontakt-karte .knopf { flex: 1 1 100%; }
  .detail-inhalt { padding: 24px 18px; }
  .detail h2 { font-size: 24px; }
  .mail-muster { grid-template-columns: 1fr; }
  .mail-muster-ergebnis { border-left: 0; border-top: 1px solid var(--linie); }
  .detail-fuss .knopf { flex: 1 1 auto; }
  .detail-preis { flex-basis: 100%; }
  .fuss { padding: 20px 16px; }
  .text { padding: 22px 18px; margin: 12px 12px 0; }
}

@media (prefers-reduced-motion: reduce) {
  .linien .fluss { animation: none; }
  .detail[open] { animation: none; }
  .tool { transition: none; }
}

@media print {
  .kopf nav, .fuss, .linien { display: none; }
  .text { border: 0; padding: 0; }
}
.detail:focus, .detail:focus-visible { outline: none; }