/* ============================================================
   ISB as a Service — Design-System
   Konzept: "Prüfungssicheres Dossier" — die Seite sieht aus wie
   das, was sie verkauft: sauber geführte, auditfeste Dokumentation.
   Null JavaScript, null externe Requests, System-Schriften.
   ============================================================ */

:root {
  /* Farben */
  --paper:      #FBFAF6;  /* Dokumentenpapier, warm-neutral */
  --paper-deep: #F2F0E9;  /* abgesetzte Sektionen */
  --ink:        #1A2430;  /* Text, fast schwarz mit Blauanteil */
  --ink-soft:   #47535F;  /* Sekundärtext */
  --petrol:     #10555C;  /* Primärfarbe: CTAs, Links, Akzente */
  --petrol-deep:#0B3D42;  /* Hover, dunkle Flächen */
  --petrol-tint:#E3EDEC;  /* helle Akzentfläche */
  --stamp:      #A63D3D;  /* Prüfstempel-Rot — NUR für das Siegel */
  --line:       #D9D5C9;  /* Hairlines */
  --ok:         #2E6B45;  /* Häkchen */

  /* Typografie: bewusst System-Stack — keine externen Fonts,
     keine Font-Dateien, kein Tracking-Vektor. Serif-Display
     (Charter/Georgia) + Sans-Body + Mono für Klausel-Label. */
  --font-display: "Charter", "Bitstream Charter", "Sitka Text", Cambria, Georgia, serif;
  --font-body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Mono", "Segoe UI Mono", Menlo, Consolas, monospace;

  --maxw: 72rem;
  --radius: 6px;
  --shadow: 0 1px 2px rgb(26 36 48 / .06), 0 8px 28px rgb(26 36 48 / .07);
}

/* ---------- Reset & Basis ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-text-size-adjust: 100%;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--petrol); text-underline-offset: 3px; }
a:hover { color: var(--petrol-deep); }
:focus-visible {
  outline: 3px solid var(--petrol);
  outline-offset: 2px;
  border-radius: 2px;
}
.skip-link {
  position: absolute; left: -999px; top: 0;
  background: var(--ink); color: #fff; padding: .6rem 1rem; z-index: 100;
}
.skip-link:focus { left: .5rem; top: .5rem; }

/* ---------- Typografie ---------- */
h1, h2, h3 { font-family: var(--font-display); line-height: 1.15; letter-spacing: -0.01em; margin: 0 0 .6em; }
h1 { font-size: clamp(2.1rem, 5vw, 3.4rem); font-weight: 700; }
h2 { font-size: clamp(1.6rem, 3.4vw, 2.3rem); font-weight: 700; }
h3 { font-size: 1.22rem; font-weight: 700; font-family: var(--font-body); letter-spacing: 0; }
p { margin: 0 0 1em; }
.lead { font-size: 1.2rem; color: var(--ink-soft); max-width: 46ch; }
.small { font-size: .9rem; color: var(--ink-soft); }

/* Klausel-Label: Dokumenten-Register als Struktur-Element */
.clause {
  font-family: var(--font-mono);
  font-size: .78rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--petrol);
  display: flex;
  align-items: center;
  gap: .7rem;
  margin: 0 0 1rem;
}
.clause::after { content: ""; flex: 1; height: 1px; background: var(--line); max-width: 8rem; }

/* ---------- Layout ---------- */
.wrap { max-width: var(--maxw); margin-inline: auto; padding-inline: clamp(1rem, 4vw, 2.5rem); }
section { padding-block: clamp(3rem, 8vw, 5.5rem); }
.section-deep { background: var(--paper-deep); }
.section-dark { background: var(--petrol-deep); color: #F2F5F4; }
.section-dark h2, .section-dark h3 { color: #fff; }
.section-dark a { color: #BFDAD6; }
.grid-2 { display: grid; gap: 2.5rem; grid-template-columns: 1fr; }
.grid-3 { display: grid; gap: 1.5rem; grid-template-columns: 1fr; }
@media (min-width: 760px) {
  .grid-2 { grid-template-columns: 1fr 1fr; align-items: center; }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

/* ---------- Header ---------- */
.site-header {
  border-bottom: 1px solid var(--line);
  background: var(--paper);
  position: sticky; top: 0; z-index: 50;
}
.site-header .wrap {
  display: flex; flex-wrap: wrap; align-items: center; gap: .8rem 1.6rem;
  padding-block: .85rem;
}
.brand {
  font-family: var(--font-display); font-weight: 700; font-size: 1.18rem;
  color: var(--ink); text-decoration: none; margin-right: auto;
}
.brand .brand-tag {
  display: block; font-family: var(--font-mono); font-weight: 400;
  font-size: .66rem; letter-spacing: .14em; text-transform: uppercase; color: var(--petrol);
}
.site-nav { display: flex; flex-wrap: wrap; gap: .2rem .4rem; align-items: center; }
.site-nav a {
  text-decoration: none; color: var(--ink); font-size: .95rem;
  padding: .45rem .7rem; border-radius: var(--radius);
}
.site-nav a:hover { background: var(--petrol-tint); color: var(--petrol-deep); }
.site-nav a[aria-current="page"] { font-weight: 600; color: var(--petrol-deep); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; text-decoration: none; font-weight: 600;
  padding: .85rem 1.5rem; border-radius: var(--radius);
  border: 2px solid var(--petrol); transition: background .15s, color .15s;
}
.btn-primary { background: var(--petrol); color: #fff; }
.btn-primary:hover { background: var(--petrol-deep); border-color: var(--petrol-deep); color: #fff; }
.btn-ghost { background: transparent; color: var(--petrol); }
.btn-ghost:hover { background: var(--petrol-tint); color: var(--petrol-deep); }
.section-dark .btn-primary { background: #fff; color: var(--petrol-deep); border-color: #fff; }
.section-dark .btn-primary:hover { background: var(--petrol-tint); border-color: var(--petrol-tint); }
.cta-row { display: flex; flex-wrap: wrap; gap: .9rem; align-items: center; margin-top: 1.6rem; }

/* ---------- Hero ---------- */
.hero { padding-block: clamp(3rem, 9vw, 6rem); }
.hero .lead { margin-top: .4rem; }
.hero-trust {
  display: flex; flex-wrap: wrap; gap: .5rem 1.4rem; margin-top: 2rem;
  font-size: .88rem; color: var(--ink-soft);
}
.hero-trust span { display: inline-flex; align-items: center; gap: .45rem; }
.hero-trust svg { flex: none; }

/* Prüfstempel-Siegel — das Signatur-Element der Seite */
.seal-wrap { display: flex; justify-content: center; }
.seal {
  width: min(310px, 78%);
  transform: rotate(-7deg);
  filter: drop-shadow(0 6px 22px rgb(26 36 48 / .12));
}

/* ---------- Logo-Leiste ---------- */
.logo-strip { padding-block: 1.8rem; border-block: 1px solid var(--line); }
.logo-strip .wrap {
  display: flex; flex-wrap: wrap; gap: 1rem 2.5rem; align-items: center; justify-content: center;
}
.logo-strip .label { font-family: var(--font-mono); font-size: .74rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-soft); }
.logo-slot {
  font-weight: 600; color: var(--ink-soft); opacity: .55; font-size: .95rem;
  border: 1px dashed var(--line); padding: .5rem 1.1rem; border-radius: var(--radius);
}

/* ---------- Karten ---------- */
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.6rem; box-shadow: var(--shadow);
}
.card h3 { margin-top: .2rem; }
.section-dark .card { background: rgb(255 255 255 / .06); border-color: rgb(255 255 255 / .18); box-shadow: none; }

/* ---------- Prozess (3 Schritte) ---------- */
.steps { counter-reset: step; }
.step { position: relative; padding-left: 0; }
.step .step-no {
  font-family: var(--font-mono); font-size: 2rem; color: var(--petrol);
  border-bottom: 2px solid var(--petrol); display: inline-block; margin-bottom: .8rem;
  padding-bottom: .2rem; min-width: 3.2rem;
}
.step .step-time { font-family: var(--font-mono); font-size: .8rem; color: var(--stamp); letter-spacing: .06em; }

/* ---------- Pricing ---------- */
.pricing { align-items: stretch; }
.price-card { display: flex; flex-direction: column; position: relative; }
.price-card.popular { border: 2px solid var(--petrol); }
.badge-popular {
  position: absolute; top: -0.85rem; left: 50%; transform: translateX(-50%);
  background: var(--petrol); color: #fff; font-size: .75rem; font-weight: 600;
  letter-spacing: .08em; text-transform: uppercase; padding: .3rem .9rem; border-radius: 999px;
  white-space: nowrap;
}
.price-value { font-family: var(--font-display); font-size: 2.2rem; font-weight: 700; margin: .3rem 0 0; }
.price-value .per { font-family: var(--font-body); font-size: .95rem; font-weight: 400; color: var(--ink-soft); }
.price-meta { font-family: var(--font-mono); font-size: .8rem; color: var(--ink-soft); margin-bottom: 1rem; }
.price-fit { font-size: .92rem; color: var(--ink-soft); border-left: 3px solid var(--petrol-tint); padding-left: .8rem; margin-bottom: 1rem; }
.checklist { list-style: none; margin: 0 0 1.4rem; padding: 0; }
.checklist li { padding-left: 1.7rem; position: relative; margin-bottom: .55rem; }
.checklist li::before {
  content: ""; position: absolute; left: 0; top: .34em; width: 1rem; height: 1rem;
  background: no-repeat center / contain url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 16 16"><path fill="none" stroke="%232E6B45" stroke-width="2.2" stroke-linecap="round" stroke-linejoin="round" d="M2.5 8.5l3.5 3.5 7.5-8"/></svg>');
}
.price-card .btn { margin-top: auto; text-align: center; }
.price-note { font-size: .9rem; color: var(--ink-soft); max-width: 62ch; margin-top: 2rem; }

/* ---------- Story / Problem ---------- */
.story {
  border-left: 4px solid var(--stamp);
  padding: .4rem 0 .4rem clamp(1.2rem, 3vw, 2rem);
  max-width: 60ch;
}
.story p:last-child { margin-bottom: 0; }

/* ---------- Timeline (10-Tage-Onboarding) ---------- */
.timeline { list-style: none; margin: 2rem 0 0; padding: 0; border-left: 2px solid var(--line); }
.timeline li { position: relative; padding: 0 0 1.6rem 1.6rem; }
.timeline li::before {
  content: ""; position: absolute; left: -7px; top: .35em;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--petrol); border: 2px solid var(--paper);
}
.timeline .t-day { font-family: var(--font-mono); font-size: .8rem; letter-spacing: .08em; color: var(--petrol); display: block; }
.timeline strong { display: block; margin-bottom: .15rem; }
.timeline li:last-child::before { background: var(--stamp); }

/* ---------- Testimonials ---------- */
blockquote.testimonial {
  margin: 0; background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.6rem; box-shadow: var(--shadow); font-family: var(--font-display); font-size: 1.06rem;
}
blockquote.testimonial footer {
  font-family: var(--font-body); font-size: .88rem; color: var(--ink-soft); margin-top: 1rem;
}

/* ---------- FAQ (details/summary — kein JS) ---------- */
.faq details {
  border-bottom: 1px solid var(--line);
  padding-block: .3rem;
}
.faq summary {
  cursor: pointer; font-weight: 600; padding: .9rem 2rem .9rem 0;
  list-style: none; position: relative;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; position: absolute; right: .2rem; top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono); font-size: 1.3rem; color: var(--petrol);
}
.faq details[open] summary::after { content: "–"; }
.faq details p { color: var(--ink-soft); max-width: 68ch; margin-top: 0; }

/* ---------- Lead-Magnet ---------- */
.magnet {
  background: var(--petrol-tint); border: 1px solid var(--petrol);
  border-radius: var(--radius); padding: clamp(1.6rem, 4vw, 2.5rem);
}

/* ---------- Kontakt-Fakten ---------- */
.fact-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 1rem; }
.fact-list li { display: grid; gap: .1rem; }
.fact-list .fact-label { font-family: var(--font-mono); font-size: .76rem; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-soft); }

/* ---------- Tabellen ---------- */
table { border-collapse: collapse; width: 100%; font-size: .96rem; }
th, td { text-align: left; padding: .7rem .8rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-family: var(--font-mono); font-size: .78rem; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-soft); }

/* ---------- Footer ---------- */
.site-footer { background: var(--ink); color: #C9CFD6; font-size: .93rem; padding-block: 3rem 2rem; }
.site-footer a { color: #E8ECEF; }
.site-footer h2 { color: #fff; font-size: 1.15rem; font-family: var(--font-body); }
.footer-grid { display: grid; gap: 2rem; grid-template-columns: 1fr; }
@media (min-width: 760px) { .footer-grid { grid-template-columns: 2fr 1fr 1fr; } }
.footer-legal { border-top: 1px solid rgb(255 255 255 / .15); margin-top: 2.5rem; padding-top: 1.4rem; font-size: .84rem; color: #9AA3AD; }
.footer-links { list-style: none; margin: 0; padding: 0; display: grid; gap: .5rem; }

/* ---------- Utility ---------- */
.mt-0 { margin-top: 0; } .mb-0 { margin-bottom: 0; }
.center { text-align: center; }
.maxw-prose { max-width: 68ch; }


/* ---------- Generierte Illustrationen ---------- */
.hero-figure { position: relative; max-width: 520px; margin-inline: auto; }
.hero-figure img.illu {
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}
.hero-figure .seal {
  position: absolute; right: -1.2rem; bottom: -1.6rem;
  width: 150px; transform: rotate(-9deg);
}
.image-band { padding-block: 0; }
.image-band img {
  width: 100%; border-block: 1px solid var(--line);
}
@media (max-width: 759px) {
  .hero-figure { max-width: 420px; }
  .hero-figure .seal { width: 110px; right: -0.4rem; bottom: -1rem; }
}