/* Bonke-Systems – Hauptseite. Statisch, keine externen Schriften, keine Skripte.
   Petrol-Palette: dunkle Bänder (Auftakt, Anwendungen) tragen die Bildflächen,
   helle Bänder (Leistungen, Kontakt) den Lesetext. */
:root {
  --petrol-deep: #0a2f35;
  --petrol: #0d4a52;
  --teal: #00898f;
  --teal-bright: #1fb0b8;
  --mint: #8fe3e8;
  --ink: #14232a;
  --ink-soft: #4e626b;
  --line: #cfdbdd;
  --ground: #f3f7f7;
  --paper: #ffffff;
  --on-dark: #e8f4f5;
  --on-dark-soft: #a9cfd3;
  --mark-bg: #fff4d6;
  --mark-line: #e0b84a;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --teal: #2fb9c1;
    --teal-bright: #5fd0d8;
    --ink: #e4eef0;
    --ink-soft: #9fb6bb;
    --line: #23393e;
    --ground: #0c1619;
    --paper: #122327;
    --mark-bg: #3d3416;
    --mark-line: #b6923a;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --teal: #2fb9c1;
  --teal-bright: #5fd0d8;
  --ink: #e4eef0;
  --ink-soft: #9fb6bb;
  --line: #23393e;
  --ground: #0c1619;
  --paper: #122327;
  --mark-bg: #3d3416;
  --mark-line: #b6923a;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font: 400 17px/1.55 "Segoe UI Variable Text", "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
}
h1, h2, h3, h4 {
  font-family: "Segoe UI Variable Display", "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.12;
  letter-spacing: -0.015em;
  text-wrap: balance;
  margin: 0;
}
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); font-weight: 700; }
h2 { font-size: clamp(1.6rem, 2.6vw, 2.1rem); font-weight: 650; color: var(--teal); }
h3 { font-size: 1.15rem; font-weight: 600; }
p { margin: 0; max-width: 62ch; }
a { color: var(--teal); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:focus-visible { outline: 2px solid var(--teal-bright); outline-offset: 3px; }
img { max-width: 100%; }

.wrap { width: min(1120px, 100% - 3rem); margin-inline: auto; }
.eyebrow {
  font-family: Consolas, "Cascadia Mono", "Segoe UI Mono", monospace;
  font-size: 0.8rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--teal-bright); margin-bottom: 0.7rem;
}
.eyebrow::before { content: "// "; opacity: 0.6; }

/* Kopf */
.top { background: var(--petrol-deep); color: var(--on-dark); border-bottom: 3px solid var(--teal); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; min-height: 68px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 0.7rem; color: inherit; text-decoration: none; font-weight: 650; letter-spacing: 0.03em; }
.brand img { height: 30px; width: auto; flex: none; }
.top nav { display: flex; gap: 1.6rem; flex-wrap: wrap; }
.top nav a { color: var(--on-dark-soft); text-decoration: none; font-size: 0.95rem; }
.top nav a:hover { color: var(--mint); }

/* Auftakt – dunkles Petrol mit Bildfläche rechts */
.hero {
  position: relative; isolation: isolate; color: var(--on-dark);
  background: var(--petrol-deep);
  padding: 5.5rem 0 4.5rem;
}
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(90deg, rgba(10, 47, 53, 0.92) 0%, rgba(10, 47, 53, 0.72) 55%, rgba(10, 47, 53, 0.25) 100%);
}
.hero h1 { color: #fff; max-width: 16ch; }
.hero h1 em { font-style: normal; color: var(--teal-bright); }
.hero p.lead { font-size: 1.2rem; color: var(--on-dark-soft); margin-top: 1.3rem; max-width: 54ch; }
.hero .facts { display: flex; gap: 2.5rem; flex-wrap: wrap; margin-top: 2.6rem; padding-top: 1.4rem; border-top: 2px solid var(--teal); }
.hero .facts div { font-size: 0.92rem; color: var(--on-dark-soft); }
.hero .facts strong { display: block; color: var(--teal-bright); font-weight: 600; font-family: Consolas, "Cascadia Mono", monospace; letter-spacing: 0.02em; }
.hero .wrap { position: relative; }
.hero-mark { position: absolute; right: 0; top: 50%; transform: translateY(-50%); width: clamp(160px, 24vw, 300px); height: auto; pointer-events: none; }
@media (max-width: 900px) { .hero-mark { display: none; } }

section.block { padding: 4.5rem 0; }
section.block h2 { margin-bottom: 0.6rem; }
.block-intro { color: var(--ink-soft); font-size: 1.05rem; margin-bottom: 2.5rem; }

/* Leistungsbereiche – Bildfläche und Text nebeneinander, Seite wechselt */
.area {
  display: grid; grid-template-columns: minmax(260px, 2fr) 3fr;
  background: var(--paper); border: 1px solid var(--line); border-top: 4px solid var(--teal); border-radius: 6px; overflow: hidden;
}
.area + .area { margin-top: 2rem; }
.area.flip .area-visual { order: 2; }
.area-visual { position: relative; min-height: 320px; background: var(--teal) center / cover no-repeat; box-shadow: inset 0 0 0 1px rgba(0,137,143,.35); }
.area-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; display: block; }
.hero-bg { position: absolute; inset: 0; z-index: -2; width: 100%; height: 100%; object-fit: cover; display: block; }
.area-visual .tag {
  position: absolute; z-index: 1; left: 1.2rem; bottom: 1.1rem;
  font-family: Consolas, "Cascadia Mono", monospace; font-size: 0.78rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--mint); background: rgba(10, 47, 53, 0.75); padding: 0.35rem 0.6rem; border-radius: 3px;
  border-left: 3px solid var(--teal-bright);
}
.area-text { padding: 2.2rem 2.4rem 2.4rem; }
.area-text h3 { font-size: 1.45rem; font-weight: 650; color: var(--teal); margin-bottom: 0.5rem; }
.area-text > p { color: var(--ink-soft); margin-bottom: 1.6rem; }
.services { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.4rem 2rem; }
.services article { padding-left: 0.9rem; border-left: 3px solid var(--teal); }
.services h4 { font-size: 1.02rem; font-weight: 600; margin: 0 0 0.3rem; line-height: 1.3; }
.services p { color: var(--ink-soft); font-size: 0.95rem; }
@media (max-width: 760px) {
  .area { grid-template-columns: 1fr; }
  .area.flip .area-visual { order: 0; }
  .area-visual { min-height: 200px; }
  .area-text { padding: 1.6rem 1.4rem 1.8rem; }
}

/* Anwendungen – dunkles Band mit Raster, Kacheln durchscheinend */
.apps-band {
  color: var(--on-dark); padding: 4.5rem 0; background-color: #00898f;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.07) 1px, transparent 1px),
    linear-gradient(135deg, #00919d 0%, #00898f 45%, #00626a 100%);
  background-size: 48px 48px, 48px 48px, 100% 100%;
}
.apps-band h2 { color: #fff; margin-bottom: 0.6rem; }
.apps-band .block-intro { color: #d6f1f3; }
.apps-band .eyebrow { color: #fff; }
.apps { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 1rem; }
.app {
  background: rgba(10, 47, 53, 0.35); border: 1px solid rgba(255, 255, 255, 0.25); border-radius: 6px;
  padding: 1.2rem 1.3rem; display: grid; grid-template-columns: 44px 1fr; grid-template-rows: auto auto;
  column-gap: 0.9rem; row-gap: 0.15rem; align-items: center; text-decoration: none; color: inherit;
  transition: border-color 0.15s, background 0.15s;
}
a.app:hover { border-color: #fff; background: rgba(10, 47, 53, 0.55); }
.app-logo { grid-row: 1 / 3; width: 44px; height: 44px; align-self: start; }
.app .name { font-weight: 650; letter-spacing: 0.04em; color: #fff; }
.app .host { font-size: 0.8rem; color: #d6f1f3; font-family: Consolas, "Cascadia Mono", monospace; }
.app p { grid-column: 1 / -1; margin-top: 0.7rem; font-size: 0.95rem; color: #e6f6f7; }
.app.planned { opacity: 0.75; border-style: dashed; }
.apps-note { margin-top: 1.4rem; font-size: 0.95rem; color: #d6f1f3; }

/* Kontakt */
.contact { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 2rem 3rem; }
dl { margin: 0; display: grid; grid-template-columns: max-content 1fr; gap: 0.35rem 1.2rem; font-size: 0.98rem; }
dt { color: var(--ink-soft); }
dd { margin: 0; }
.hours h3 { margin-bottom: 0.5rem; }
.hours table { border-collapse: collapse; font-size: 0.98rem; }
.hours td { padding: 0.15rem 1.2rem 0.15rem 0; font-variant-numeric: tabular-nums; }
.hours-note { margin-top: 1rem; font-size: 0.95rem; color: var(--ink-soft); }

/* Fuß */
footer { padding: 2rem 0 2.5rem; font-size: 0.9rem; color: var(--ink-soft); border-top: 4px solid var(--teal); }
footer .wrap { display: flex; justify-content: space-between; gap: 1.5rem; flex-wrap: wrap; }
footer nav { display: flex; gap: 1.4rem; }

/* Unterseiten (Impressum, Datenschutz) */
.page { padding: 3.5rem 0 4rem; }
.page h1 { font-size: 2rem; margin-bottom: 1.8rem; }
.page h2 { font-size: 1.25rem; margin: 2rem 0 0.6rem; }
.page p, .page li { max-width: 68ch; }
.page p + p { margin-top: 0.7rem; }
.page ul { padding-left: 1.2rem; }
address { font-style: normal; }
.stand { margin-top: 2rem; color: var(--ink-soft); font-size: 0.9rem; }

/* Platzhalter – vor dem Freischalten ersetzen */
mark.todo {
  background: var(--mark-bg); color: inherit; border-bottom: 1px dashed var(--mark-line);
  padding: 0 0.2em; border-radius: 2px;
}

/* Engineering-Bereich */
.area-mark { position: absolute; z-index: 1; left: 1.2rem; top: 1.2rem; width: 96px; height: 96px; }
.area-more { margin-top: 1.6rem; font-weight: 600; }
.area-more a { text-decoration: none; }
.area-more a:hover { text-decoration: underline; }

/* Unterseite Engineering – Auftaktband mit BE-Marke */
.page-hero.software { background-image: url("../img/bg-software.svg"); }
.page-hero {
  color: var(--on-dark); background: var(--petrol-deep) url("../img/bg-engineering.svg") center / cover no-repeat;
  position: relative; isolation: isolate; padding: 4.5rem 0 4rem;
}
.page-hero::after { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(90deg, rgba(10,47,53,.94) 0%, rgba(10,47,53,.75) 55%, rgba(10,47,53,.3) 100%); }
.page-hero h1 { color: #fff; max-width: 18ch; }
.page-hero .lead { font-size: 1.15rem; color: var(--on-dark-soft); margin-top: 1.2rem; max-width: 56ch; }
.page-hero .mark { width: 120px; height: 120px; margin-bottom: 1.6rem; display: block; }
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.2rem; counter-reset: step; }
.steps article { background: var(--paper); border: 1px solid var(--line); border-radius: 6px; padding: 1.3rem 1.4rem; }
.steps article { border-top: 4px solid var(--teal); }
.steps article::before { counter-increment: step; content: "0" counter(step); display: block; font-family: Consolas, "Cascadia Mono", monospace; color: var(--teal); font-size: 0.85rem; letter-spacing: 0.1em; margin-bottom: 0.5rem; }
.steps h3 { margin-bottom: 0.4rem; }
.steps p { color: var(--ink-soft); font-size: 0.95rem; }
.cta { background: var(--paper); border: 1px solid var(--line); border-left: 6px solid var(--teal); border-radius: 6px; padding: 1.5rem 1.8rem; display: flex; gap: 1.5rem; align-items: center; justify-content: space-between; flex-wrap: wrap; }
.cta strong { display: block; font-size: 1.1rem; margin-bottom: 0.2rem; }
.cta p { color: var(--ink-soft); font-size: 0.95rem; }
.btn { display: inline-block; background: var(--teal); color: #fff; text-decoration: none; padding: 0.7rem 1.2rem; border-radius: 4px; font-weight: 600; }
.btn:hover { background: var(--teal-bright); }

/* Team Engineering */
.team { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.2rem; }
.person { background: var(--paper); border: 1px solid var(--line); border-top: 4px solid var(--teal); border-radius: 6px; padding: 1.4rem; display: grid; grid-template-columns: 120px 1fr; gap: 1.2rem; align-items: start; }
.person-photo { width: 120px; height: 160px; object-fit: cover; border-radius: 6px; background: var(--teal); display: block; }
.person h3 { font-size: 1.15rem; margin-bottom: 0.2rem; }
.person-role { color: var(--ink-soft); font-size: 0.92rem; margin-bottom: 0.8rem; }
.person dl { font-size: 0.95rem; }
@media (max-width: 480px) { .person { grid-template-columns: 1fr; } }

/* Themenseite E-Rechnung */
.page-hero .facts { display: flex; gap: 2.5rem; flex-wrap: wrap; margin-top: 2.4rem; padding-top: 1.4rem; border-top: 2px solid var(--teal); }
.page-hero .facts div { font-size: 0.92rem; color: var(--on-dark-soft); }
.page-hero .facts strong { display: block; color: var(--teal-bright); font-weight: 600; font-family: Consolas, "Cascadia Mono", monospace; letter-spacing: 0.02em; }
.table-wrap { overflow-x: auto; }
.timeline { border-collapse: collapse; width: 100%; font-size: 0.98rem; background: var(--paper); border: 1px solid var(--line); border-radius: 6px; }
.timeline th, .timeline td { text-align: left; vertical-align: top; padding: 0.8rem 1rem; border-bottom: 1px solid var(--line); }
.timeline th { font-family: Consolas, "Cascadia Mono", monospace; font-size: 0.8rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--teal); }
.timeline td:first-child { font-family: Consolas, "Cascadia Mono", monospace; white-space: nowrap; color: var(--teal); font-weight: 600; }
.timeline td:last-child { color: var(--ink-soft); white-space: nowrap; }
.timeline tr:last-child td { border-bottom: 0; }
.note { margin-top: 1.2rem; font-size: 0.95rem; color: var(--ink-soft); }
/* FAQ – eine Spalte, Frage über Antwort; hebt die zweispaltige dl-Regel des Kontaktblocks auf */
.faq { margin: 0; display: grid; grid-template-columns: 1fr; gap: 1rem; max-width: 76ch; }
.faq div { background: var(--paper); border: 1px solid var(--line); border-left: 4px solid var(--teal); border-radius: 6px; padding: 1.1rem 1.4rem; }
.faq dt { font-weight: 650; color: var(--ink); font-size: 1.05rem; line-height: 1.3; }
.faq dd { margin: 0.55rem 0 0; color: var(--ink-soft); font-size: 0.98rem; max-width: none; }
.services + .services { margin-top: 1.4rem; }
.apps-note a { color: #fff; }

/* Animierte Bildfläche als <img> (läuft so auch in Safari), Banner im Türkis-Band */
.page-hero-bg { position: absolute; inset: 0; z-index: -2; width: 100%; height: 100%; object-fit: cover; display: block; }
.page-hero.software { background-image: none; }
.band-mark { display: block; width: min(366px, 100%); height: auto; margin-bottom: 1.6rem; border-radius: 12px; box-shadow: 0 6px 24px rgba(0, 0, 0, 0.25); }

/* Ladebalken – wie in den Anwendungen: 3 px am oberen Rand, unbestimmt, Türkis */
.ladebalken { position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: 2000; background-color: rgba(0, 137, 143, 0.15); overflow: hidden; display: none; }
.ladebalken.laeuft { display: block; }
.ladebalken.laeuft::before { content: ""; position: absolute; top: 0; bottom: 0; width: 40%; background: linear-gradient(90deg, transparent, var(--teal-bright), transparent); animation: ladebalken-lauf 1.1s ease-in-out infinite; }
@keyframes ladebalken-lauf { from { left: -40%; } to { left: 100%; } }
@media (prefers-reduced-motion: reduce) { .ladebalken.laeuft::before { animation: none; left: 0; width: 100%; opacity: 0.6; } }

/* Formular Testzugang */
.form-wrap { max-width: 720px; }
.form-title { font-size: clamp(1.8rem, 3vw, 2.4rem); color: var(--teal); margin-bottom: 0.6rem; }
.form { display: grid; gap: 1.1rem; background: var(--paper); border: 1px solid var(--line); border-top: 4px solid var(--teal); border-radius: 6px; padding: 1.6rem 1.8rem 1.8rem; }
.field { display: grid; gap: 0.35rem; }
.field-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.1rem; }
.field label { font-weight: 600; font-size: 0.95rem; }
.field .req { color: var(--teal); }
.field .opt { color: var(--ink-soft); font-weight: 400; }
.field input, .field textarea { font: inherit; color: var(--ink); background: var(--ground); border: 1px solid var(--line); border-radius: 4px; padding: 0.6rem 0.75rem; width: 100%; }
.field input:focus, .field textarea:focus { outline: 2px solid var(--teal-bright); outline-offset: 1px; border-color: var(--teal); }
.field textarea { resize: vertical; min-height: 4.5rem; }
.hp { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.form-actions { display: flex; align-items: center; gap: 1.2rem; flex-wrap: wrap; margin-top: 0.4rem; }
.form-alt { color: var(--ink-soft); font-size: 0.95rem; }
.btn { border: 0; cursor: pointer; font: inherit; }

/* Aufrufe zum Testzugang – im Auftakt, im Türkis-Band und am Seitenende */
.hero-cta { display: flex; gap: 0.8rem; flex-wrap: wrap; align-items: center; margin-top: 1.6rem; }
.btn-ghost { background: transparent; color: var(--mint); border: 1px solid rgba(143, 227, 232, 0.5); }
.btn-ghost:hover { background: rgba(143, 227, 232, 0.12); color: #fff; }
.btn-light { background: #fff; color: var(--teal); }
.btn-light:hover { background: #e6f6f7; color: var(--petrol); }
.btn-outline { background: transparent; color: var(--teal); border: 1px solid var(--teal); }
.btn-outline:hover { background: var(--teal); color: #fff; }
.band-cta { display: flex; gap: 1rem; align-items: center; flex-wrap: wrap; margin-top: 1.6rem; padding-top: 1.4rem; border-top: 1px solid rgba(255, 255, 255, 0.25); color: #d6f1f3; font-size: 0.95rem; }
.band-cta a:not(.btn) { color: #fff; }
.cta .form-alt a { color: var(--teal); }

/* Landingpage BS-INVOICE */
.hero-banner { display: block; width: min(300px, 100%); height: auto; margin-bottom: 1.6rem; border-radius: 12px; box-shadow: 0 6px 24px rgba(0, 0, 0, 0.3); }
.punkte { margin: 0; padding: 0; list-style: none; display: grid; gap: 0.8rem; max-width: 72ch; }
.punkte li { padding-left: 1.1rem; border-left: 3px solid var(--teal); color: var(--ink-soft); }
.punkte li strong { color: var(--ink); }
.demo { margin: 2rem 0 0; }
.demo img { display: block; width: 100%; height: auto; border-radius: 6px; border: 1px solid var(--line); }
.demo figcaption { margin-top: 0.6rem; font-size: 0.9rem; color: var(--ink-soft); font-family: Consolas, "Cascadia Mono", monospace; }
.preis { background: var(--paper); border: 1px solid var(--line); border-top: 4px solid var(--teal); border-radius: 6px; padding: 1.8rem 2rem; display: grid; gap: 1.2rem; max-width: 560px; }
.preis-zahl { display: flex; align-items: baseline; gap: 0.8rem; flex-wrap: wrap; }
.preis-zahl .betrag { font-size: 2.6rem; font-weight: 700; color: var(--teal); letter-spacing: -0.02em; }
.preis-zahl .einheit { color: var(--ink-soft); }
.preis-liste { margin: 0; padding: 0; list-style: none; display: grid; gap: 0.4rem; color: var(--ink-soft); }
.preis-liste li::before { content: "✓ "; color: var(--teal); font-weight: 700; }
.preis .btn { justify-self: start; }

/* Anwendungs-Kacheln der Startseite: Kachel → Infoseite, darunter Knopf zur Anmeldung */
.app.app-link { grid-template-columns: 1fr; grid-template-rows: auto auto; row-gap: 0.9rem; padding: 0; overflow: hidden; }
.app-info { display: grid; grid-template-columns: 44px 1fr; grid-template-rows: auto auto; column-gap: 0.9rem; row-gap: 0.15rem; align-items: center; padding: 1.2rem 1.3rem 0; color: inherit; text-decoration: none; }
.app-info:hover .name { text-decoration: underline; }
.app.app-link.planned .app-info { padding-bottom: 1.2rem; }
.app-login { display: block; margin: 0 1.3rem 1.2rem; padding: 0.55rem 0.9rem; text-align: center; border: 1px solid rgba(255, 255, 255, 0.55); border-radius: 4px; color: #fff; font-weight: 600; text-decoration: none; font-size: 0.95rem; }
.app-login:hover { background: #fff; color: var(--petrol); }
.app-hero-logo { width: 72px; height: 72px; margin-bottom: 1.2rem; display: block; }

/* E-Mail-Verweise werden erst im Browser zusammengesetzt; ohne Skript sehen sie trotzdem wie Verweise aus */
a.mail, a.tel { color: var(--teal); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; cursor: pointer; }
.apps-note a.mail, .band-cta a.mail, .apps-note a.tel, .band-cta a.tel { color: #fff; }

/* Kennzeichen auf den Anwendungskacheln: verfügbar / in Entwicklung */
.app.app-link { position: relative; }
.badge { position: absolute; top: 0.9rem; right: 0.9rem; font-family: Consolas, "Cascadia Mono", monospace; font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; padding: 0.25rem 0.55rem; border-radius: 3px; }
.badge-ok { background: #fff; color: var(--teal); }
.badge-dev { background: rgba(10, 47, 53, 0.6); color: #ffd27a; border: 1px solid rgba(255, 210, 122, 0.6); }
.app.app-link .app-info { padding-top: 2.6rem; }
.page-hero .dev-note { color: #ffd27a; border-left: 3px solid #ffd27a; padding-left: 0.8rem; margin-top: 1rem; }
.page-hero .dev-note a { color: #fff; }