/* Air-Expert / Roland Rau — Website Stylesheet */

:root {
  --navy: #0f1b2d;
  --navy-light: #16273d;
  --navy-lighter: #1f3350;
  --teal: #0f8f83;
  --teal-dark: #0b6b62;
  --amber-1: #d99a3f;
  --amber-2: #f0c869;
  --off-white: #f4f6f8;
  --paper: #ffffff;
  --ink: #1c2530;
  --ink-soft: #4b5665;
  --border: #e3e7ec;
  --max: 1120px;
  --font-body: -apple-system, "Segoe UI", Roboto, Arial, "Helvetica Neue", sans-serif;
  --font-head: Georgia, "Times New Roman", "Cambria", serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
  font-size: 17px;
}
img { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3, h4 { font-family: var(--font-head); font-weight: 700; line-height: 1.25; margin: 0 0 0.5em; }
p { margin: 0 0 1em; }
ul { margin: 0 0 1em; padding-left: 1.2em; }
.container { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* Eyebrow / kicker */
.kicker {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 12px;
}
.kicker.on-dark { color: var(--amber-2); }

/* ---------- Header / Nav ---------- */
header.site-header {
  background: var(--navy);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  max-width: var(--max);
  margin: 0 auto;
}
.brand {
  color: var(--off-white);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 20px;
  text-decoration: none;
  letter-spacing: 0.02em;
}
.brand span { color: var(--amber-2); }
nav.main-nav { display: flex; align-items: center; gap: 22px; }
nav.main-nav a {
  color: #cfd8e3;
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
  white-space: nowrap;
  padding: 8px 0;
  border-bottom: 2px solid transparent;
  transition: color .15s, border-color .15s;
}
nav.main-nav a:hover, nav.main-nav a.active { color: var(--off-white); border-color: var(--amber-2); }
.nav-cta {
  background: linear-gradient(135deg, var(--amber-1), var(--amber-2));
  color: var(--navy) !important;
  padding: 10px 18px !important;
  border-radius: 6px;
  border-bottom: none !important;
  font-weight: 700 !important;
}

/* Mobile menu (checkbox hack, no JS) */
.menu-toggle { display: none; }
.menu-label { display: none; cursor: pointer; }
.menu-label span, .menu-label span::before, .menu-label span::after {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--off-white);
  position: relative;
  transition: background .15s;
}
.menu-label span::before, .menu-label span::after { content: ""; position: absolute; }
.menu-label span::before { top: -8px; }
.menu-label span::after { top: 8px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 14px 26px;
  border-radius: 6px;
  font-weight: 700;
  text-decoration: none;
  font-size: 15px;
  cursor: pointer;
  border: 2px solid transparent;
}
.btn-primary {
  background: linear-gradient(135deg, var(--amber-1), var(--amber-2));
  color: var(--navy);
}
.btn-primary:hover { filter: brightness(1.05); }
.btn-outline {
  border-color: rgba(255,255,255,0.35);
  color: var(--off-white);
}
.btn-outline:hover { border-color: var(--amber-2); color: var(--amber-2); }
.btn-outline-dark {
  border-color: var(--navy);
  color: var(--navy);
}
.btn-outline-dark:hover { background: var(--navy); color: var(--off-white); }
.btn-row { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 28px; }

/* ---------- Hero ---------- */
.hero {
  background: var(--navy);
  color: var(--off-white);
  padding: 72px 0 88px;
}
.hero-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 48px;
  align-items: center;
}
.hero-grid > div { flex: 1 1 460px; }
.hero-grid > .hero-image { flex: 1 1 380px; }
.hero h1 { font-size: 42px; color: var(--off-white); margin-bottom: 20px; }
.hero .lead { font-size: 19px; color: #c3ccd8; max-width: 520px; }
.hero-image { border-radius: 14px; overflow: hidden; box-shadow: 0 20px 50px rgba(0,0,0,0.35); }
.hero-image img { width: 100%; height: 100%; object-fit: cover; }

.page-hero {
  background: var(--navy);
  color: var(--off-white);
  padding: 56px 0 64px;
}
.page-hero h1 { color: var(--off-white); font-size: 36px; }
.page-hero .lead { color: #c3ccd8; font-size: 18px; max-width: 680px; }
.breadcrumb { font-size: 13px; color: #8a97a8; margin-bottom: 18px; }
.breadcrumb a { color: #8a97a8; text-decoration: none; }
.breadcrumb a:hover { color: var(--amber-2); }

/* ---------- Sections ---------- */
section { padding: 72px 0; }
section.alt { background: var(--off-white); }
.section-head { max-width: 700px; margin-bottom: 44px; }
.section-head h2 { font-size: 30px; color: var(--navy); }
.section-head p { color: var(--ink-soft); font-size: 17px; }

/* Trust badges */
.badges { display: flex; flex-wrap: wrap; gap: 24px; margin-top: 36px; }
.badges > .badge { flex: 1 1 220px; }
.badge { background: var(--navy-light); border-radius: 10px; padding: 22px; }
.badge h4 { color: var(--amber-2); font-size: 16px; margin-bottom: 6px; }
.badge p { color: #c3ccd8; font-size: 14px; margin: 0; }

/* Positionierung / intro with portrait */
.intro-grid { display: flex; flex-wrap: wrap; gap: 48px; align-items: center; }
.intro-grid > img { flex: 1 1 340px; border-radius: 14px; }
.intro-grid > div { flex: 2 1 460px; }

/* Cards grid (Fragestellungen / Leistungen / Zielgruppen) */
.card-grid { display: flex; flex-wrap: wrap; gap: 20px; }
.card-grid > .card { flex: 1 1 320px; }
.card-grid.cols-3 > .card { flex: 1 1 280px; }
.card {
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 26px;
}
.card h3 { font-size: 18px; color: var(--navy); margin-bottom: 8px; font-family: var(--font-body); }
.card p { color: var(--ink-soft); font-size: 15px; margin: 0; }
.card .num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px; height: 34px;
  border-radius: 50%;
  background: rgba(15,143,131,0.1);
  color: var(--teal);
  font-weight: 700;
  margin-bottom: 12px;
  font-family: var(--font-head);
}

/* Stats */
.stat-grid { display: flex; flex-wrap: wrap; gap: 20px; margin-top: 12px; }
.stat-grid > .stat { flex: 1 1 220px; }
.stat { background: var(--navy); color: var(--off-white); border-radius: 10px; padding: 26px 20px; }
.stat .stat-num { font-family: var(--font-head); font-size: 30px; color: var(--amber-2); display: block; margin-bottom: 4px; }
.stat .stat-label { font-size: 13px; color: #c3ccd8; }
.stat p.stat-desc { font-size: 13px; color: #9fadbd; margin: 8px 0 0; }

/* Differentiator rows (Warum Roland Rau) */
.diff-grid { display: flex; flex-wrap: wrap; gap: 24px; }
.diff-grid > .diff { flex: 1 1 380px; }
.diff { display: flex; gap: 16px; }
.diff .dot {
  flex: none;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: rgba(15,143,131,0.12);
  color: var(--teal-dark);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
  font-family: var(--font-head);
}
.diff h4 { margin: 0 0 6px; font-size: 16px; color: var(--navy); }
.diff p { margin: 0; color: var(--ink-soft); font-size: 15px; }

/* Zertifizierung split */
.cert-grid { display: flex; flex-wrap: wrap; gap: 48px; align-items: center; }
.cert-grid > img { flex: 1 1 340px; border-radius: 14px; }
.cert-grid > div { flex: 1.3 1 460px; }
.cert-points { margin-top: 24px; display: grid; gap: 16px; }
.cert-point h4 { margin: 0 0 4px; font-size: 15px; color: var(--navy); }
.cert-point p { margin: 0; color: var(--ink-soft); font-size: 14px; }

/* Case studies */
.case {
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 40px;
  margin-bottom: 40px;
}
.case .kicker { color: var(--teal); }
.case h2 { font-size: 26px; color: var(--navy); margin-bottom: 6px; }
.case h3.sub { font-size: 17px; color: var(--ink-soft); font-family: var(--font-body); font-weight: 700; margin-top: 28px; margin-bottom: 10px; }
.case blockquote {
  margin: 28px 0 0;
  padding: 20px 24px;
  background: var(--off-white);
  border-radius: 10px;
  font-family: var(--font-head);
  font-style: italic;
  color: var(--navy);
  font-size: 17px;
}
.case ul li { margin-bottom: 6px; color: var(--ink-soft); }

/* Kontakt */
.contact-grid { display: flex; flex-wrap: wrap; gap: 40px; }
.contact-grid > div { flex: 1 1 380px; }
.contact-card {
  background: var(--navy);
  color: var(--off-white);
  border-radius: 14px;
  padding: 36px;
}
.contact-card h3 { color: var(--off-white); font-size: 20px; }
.contact-card .line { margin: 14px 0; font-size: 16px; }
.contact-card a { color: var(--amber-2); text-decoration: none; }
.contact-card a:hover { text-decoration: underline; }
.contact-note { color: var(--ink-soft); font-size: 14px; margin-top: 18px; font-style: italic; }

/* CTA band */
.cta-band {
  background: linear-gradient(135deg, var(--navy), var(--navy-lighter));
  color: var(--off-white);
  text-align: center;
  border-radius: 16px;
  padding: 56px 32px;
}
.cta-band h2 { color: var(--off-white); font-size: 28px; }
.cta-band p { color: #c3ccd8; }
.cta-band .btn-row { justify-content: center; }

/* Legal pages */
.legal h2.sec { font-size: 20px; color: var(--navy); margin-top: 36px; }
.legal p, .legal li { color: var(--ink-soft); }
.legal address { font-style: normal; }

/* Footer */
footer.site-footer {
  background: var(--navy);
  color: #9fadbd;
  padding: 48px 0 28px;
  font-size: 14px;
}
.footer-grid { display: flex; flex-wrap: wrap; gap: 32px; margin-bottom: 32px; }
.footer-grid > div { flex: 1 1 220px; }
.footer-grid h4 { color: var(--off-white); font-size: 14px; margin-bottom: 12px; }
.footer-grid a { color: #9fadbd; text-decoration: none; display: block; margin-bottom: 8px; }
.footer-grid a:hover { color: var(--amber-2); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 2