/* ==========================================================================
   DICHTEXPERT – Stylesheet
   Farbpalette: siehe :root Custom Properties
   ========================================================================== */

:root {
  --color-petrol: #459A92;
  --color-petrol-dark: #357670;
  --color-mahagoni: #662503;
  --color-mahagoni-dark: #4d1c02;
  --color-fensterblau: #9BBBE4;
  --color-fensterblau-dark: #6f96c9;
  --color-gelb: #F7B500;
  --color-weiss: #F6F6F6;
  --color-anthrazit: #293133;
  --color-white: #ffffff;

  --color-text: var(--color-anthrazit);
  --color-text-soft: #52595b;
  --color-bg: var(--color-white);
  --color-bg-alt: var(--color-weiss);
  --color-border: #e1e4e2;

  --font-base: "Segoe UI", "Helvetica Neue", Arial, system-ui, sans-serif;
  --font-heading: "Segoe UI", "Helvetica Neue", Arial, system-ui, sans-serif;

  --container-w: 1180px;
  --radius-s: 6px;
  --radius-m: 12px;
  --radius-l: 20px;
  --shadow-s: 0 2px 8px rgba(41, 49, 51, 0.08);
  --shadow-m: 0 8px 28px rgba(41, 49, 51, 0.12);
  --header-h: 120px;

  --space-xs: 0.5rem;
  --space-s: 1rem;
  --space-m: 1.75rem;
  --space-l: 3rem;
  --space-xl: 5rem;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }
html, body { overflow-x: hidden; }
body {
  margin: 0;
  padding-top: var(--header-h);
  font-family: var(--font-base);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p, figure { margin: 0; }
button { font: inherit; cursor: pointer; }
input, select, textarea { font: inherit; }

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--color-petrol);
  line-height: 1.2;
  font-weight: 700;
}
h1 { font-size: clamp(2rem, 4vw + 1rem, 3.4rem); }
h2 { font-size: clamp(1.6rem, 2.4vw + 1rem, 2.4rem); }
h3 { font-size: clamp(1.15rem, 1vw + 1rem, 1.4rem); }

.section-kicker {
  display: inline-block;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.8rem;
  color: var(--color-mahagoni);
  margin-bottom: var(--space-xs);
}

.lede {
  font-size: 1.1rem;
  color: var(--color-text-soft);
  max-width: 60ch;
}

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: var(--space-s);
}
.section { padding-block: var(--space-xl); }
.section--alt { background: var(--color-bg-alt); }
.section--dark {
  background: var(--color-anthrazit);
  color: #dfe4e5;
}
.section--dark h2, .section--dark h3 { color: var(--color-fensterblau); }
.section-head { max-width: 70ch; margin-bottom: var(--space-l); }
.section-head--center { margin-inline: auto; text-align: center; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: 0; top: -100px;
  background: var(--color-petrol); color: #fff;
  padding: 0.75rem 1.25rem; z-index: 200;
  border-radius: 0 0 var(--radius-s) 0;
  transition: top 0.2s ease;
}
.skip-link:focus { top: 0; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.85em 1.6em;
  border-radius: var(--radius-s);
  font-weight: 700;
  border: 2px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease, color 0.15s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn:focus-visible { outline: 3px solid var(--color-petrol); outline-offset: 2px; }

.btn--primary {
  background: var(--color-fensterblau);
  color: var(--color-anthrazit);
  box-shadow: var(--shadow-s);
}
.btn--primary:hover { background: var(--color-fensterblau-dark); }

.btn--accent {
  background: var(--color-gelb);
  color: var(--color-anthrazit);
  box-shadow: var(--shadow-s);
}
.btn--accent:hover { background: #e0a600; }

.btn--outline {
  background: transparent;
  border-color: currentColor;
  color: var(--color-petrol);
}
.btn--outline:hover { background: var(--color-petrol); color: #fff; }

.btn--ghost-light {
  background: rgba(255,255,255,0.12);
  border-color: rgba(255,255,255,0.7);
  color: #fff;
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
}
.btn--ghost-light:hover { background: #fff; color: var(--color-petrol); }

.btn--sm { padding: 0.55em 1.1em; font-size: 0.9rem; }

/* ---------- Header / Navigation ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(246, 246, 246, 0.94);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.site-header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-m);
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
}
.brand img { height: 100px; width: auto; }

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-m);
}
.main-nav__list {
  display: flex;
  gap: 1.6rem;
}
.main-nav__list a {
  font-weight: 600;
  color: var(--color-anthrazit);
  padding: 0.4rem 0.1rem;
  border-bottom: 2px solid transparent;
  transition: border-color 0.15s ease, color 0.15s ease;
}
.main-nav__list a:hover,
.main-nav__list a[aria-current="page"] {
  color: var(--color-petrol);
  border-color: var(--color-petrol);
}

.header-actions { display: flex; align-items: center; gap: 0.75rem; flex-shrink: 0; }
.call-btn {
  display: inline-flex; align-items: center; gap: 0.5em;
  background: var(--color-petrol);
  color: #fff;
  padding: 0.6em 1.1em;
  border-radius: var(--radius-s);
  font-weight: 700;
  font-size: 0.92rem;
  box-shadow: var(--shadow-s);
  transition: background-color 0.15s ease, transform 0.15s ease;
}
.call-btn:hover { background: var(--color-petrol-dark); transform: translateY(-2px); }
.call-btn svg { width: 1.1em; height: 1.1em; flex-shrink: 0; }

.nav-toggle {
  display: none;
  background: transparent;
  border: none;
  padding: 0.5rem;
  color: var(--color-anthrazit);
}
.nav-toggle svg { width: 28px; height: 28px; }

@media (max-width: 900px) {
  :root { --header-h: 84px; }
  .site-header__inner { gap: 0.6rem; }
  .brand img { height: 56px; }
  .call-btn { padding: 0.6em; }
  .call-btn span { display: none; }
  .main-nav {
    position: fixed;
    top: var(--header-h);
    right: 0;
    left: 0;
    height: calc(100vh - var(--header-h));
    height: calc(100dvh - var(--header-h));
    background: var(--color-weiss);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-m);
    gap: var(--space-m);
    transform: translateX(100%);
    transition: transform 0.25s ease;
    overflow-y: auto;
  }
  .main-nav.is-open { transform: translateX(0); }
  .main-nav__list { flex-direction: column; gap: 0.25rem; }
  .main-nav__list a { display: block; padding: 0.9rem 0.5rem; font-size: 1.1rem; border-bottom: 1px solid var(--color-border); }
  .nav-toggle { display: inline-flex; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  color: #fff;
  display: flex;
  align-items: center;
  min-height: min(78vh, 640px);
  overflow: hidden;
}
.hero__bg {
  position: absolute; inset: 0;
  z-index: 0;
}
.hero__bg img { width: 100%; height: 100%; object-fit: cover; }
.hero__bg::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(115deg, rgba(35,58,55,0.88) 0%, rgba(41,49,51,0.62) 55%, rgba(41,49,51,0.35) 100%);
}
.hero__content {
  position: relative;
  z-index: 1;
  max-width: 680px;
  padding-block: var(--space-xl);
}
.hero__content h1 { color: #fff; }
.hero__sub { font-size: 1.2rem; margin-top: var(--space-s); color: #f0f4f2; max-width: 52ch; }
.hero__badge {
  display: inline-flex; align-items: center; gap: 0.5em;
  background: var(--color-gelb); color: var(--color-anthrazit);
  font-weight: 700; font-size: 0.85rem;
  padding: 0.4em 0.9em; border-radius: 999px;
  margin-bottom: var(--space-s);
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: var(--space-m); }

.hero--compact { min-height: min(52vh, 440px); }

/* ---------- Grids & Cards ---------- */
.grid {
  display: grid;
  gap: var(--space-m);
}
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--6 { grid-template-columns: repeat(6, 1fr); }
@media (max-width: 900px) {
  .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--6 { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 620px) {
  .grid--2, .grid--3, .grid--4, .grid--6 { grid-template-columns: 1fr; }
}

.card {
  background: #fff;
  border-radius: var(--radius-m);
  box-shadow: var(--shadow-s);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-border);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-m); }
.card__media { aspect-ratio: 4 / 3; overflow: hidden; background: var(--color-bg-alt); }
.card__media img { width: 100%; height: 100%; object-fit: cover; }
.card__body { padding: var(--space-m); display: flex; flex-direction: column; gap: 0.6rem; flex: 1; }
.card__body p { color: var(--color-text-soft); }

.badge-number {
  display: inline-flex; align-items: center; justify-content: center;
  width: 2.6rem; height: 2.6rem;
  border-radius: 50%;
  background: var(--color-petrol);
  color: #fff;
  font-weight: 800;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.badge-number--outline {
  background: transparent;
  border: 2px solid var(--color-fensterblau);
  color: var(--color-petrol);
}

.problem-card, .tile {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-m);
  padding: var(--space-m);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  box-shadow: var(--shadow-s);
}
.problem-card__num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--color-fensterblau-dark);
  line-height: 1;
}

.tile__num {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--color-mahagoni);
}

.icon-list li {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  padding: 0.5rem 0;
}
.icon-list svg {
  flex-shrink: 0;
  width: 1.4rem; height: 1.4rem;
  color: var(--color-petrol);
  margin-top: 0.15rem;
}

.checklist { display: grid; gap: 0.6rem; }
.checklist li {
  display: flex; align-items: flex-start; gap: 0.65rem;
  background: var(--color-white);
  border-left: 3px solid var(--color-fensterblau);
  padding: 0.7rem 0.9rem;
  border-radius: 0 var(--radius-s) var(--radius-s) 0;
  box-shadow: var(--shadow-s);
}

.pill-list { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.pill-list li {
  background: var(--color-fensterblau);
  color: var(--color-anthrazit);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0.5em 1em;
  border-radius: 999px;
}

/* ---------- Fact / stat tiles ---------- */
.fact-strip {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-l);
  align-items: center;
  background: var(--color-anthrazit);
  color: #fff;
  border-radius: var(--radius-l);
  overflow: hidden;
}
.fact-strip__media { height: 100%; min-height: 260px; }
.fact-strip__media img { width: 100%; height: 100%; object-fit: cover; }
.fact-strip__body { padding: var(--space-l); }
.fact-strip__stat {
  display: flex; align-items: baseline; gap: 0.75rem;
  margin-bottom: var(--space-s);
}
.fact-strip__stat .num {
  font-size: 3.2rem; font-weight: 800; color: var(--color-gelb); line-height: 1;
}
.fact-strip__stat .label { font-weight: 600; color: #dfe4e5; }
@media (max-width: 800px) {
  .fact-strip { grid-template-columns: 1fr; }
  .fact-strip__media { min-height: 200px; }
}

/* ---------- Process steps ---------- */
.steps { display: grid; gap: var(--space-l); }
.step {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: var(--space-m);
  align-items: start;
}
.step__num {
  display: flex; align-items: center; justify-content: center;
  width: 96px; height: 96px;
  border-radius: 50%;
  background: linear-gradient(145deg, var(--color-petrol), var(--color-petrol-dark));
  color: #fff;
  font-size: 2rem;
  font-weight: 800;
  box-shadow: var(--shadow-m);
}
.step__body { padding-top: 0.4rem; }
.step__body h3 { margin-bottom: 0.4rem; }
.step__body p { color: var(--color-text-soft); }
.step__media { margin-top: var(--space-s); border-radius: var(--radius-m); overflow: hidden; box-shadow: var(--shadow-s); max-width: 420px; }
@media (max-width: 620px) {
  .step { grid-template-columns: 64px 1fr; }
  .step__num { width: 64px; height: 64px; font-size: 1.4rem; }
}

/* ---------- Split section (image + text) ---------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-l);
  align-items: center;
}
.split__media { border-radius: var(--radius-l); overflow: hidden; box-shadow: var(--shadow-m); }
.split__media img { width: 100%; height: 100%; object-fit: cover; }
.split--reverse .split__media { order: 2; }
@media (max-width: 860px) {
  .split { grid-template-columns: 1fr; }
  .split--reverse .split__media { order: 0; }
}

/* ---------- CTA band ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--color-petrol), var(--color-petrol-dark));
  color: #fff;
  border-radius: var(--radius-l);
  padding: var(--space-l);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-m);
}
.cta-band h2 { color: #fff; }
.cta-band p { color: #e6f1ef; }
.cta-band__actions { display: flex; flex-wrap: wrap; gap: 1rem; }

/* ---------- Forms ---------- */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-s) var(--space-m);
}
.form-grid .field--full { grid-column: 1 / -1; }
@media (max-width: 620px) {
  .form-grid { grid-template-columns: 1fr; }
}
.field { display: flex; flex-direction: column; gap: 0.4rem; }
.field label { font-weight: 600; font-size: 0.92rem; }
.field label .req { color: var(--color-mahagoni); }
.field input,
.field select,
.field textarea {
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-s);
  padding: 0.75em 0.9em;
  background: #fff;
  color: var(--color-anthrazit);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--color-petrol);
  box-shadow: 0 0 0 3px rgba(69, 154, 146, 0.18);
}
.field input:invalid:not(:placeholder-shown),
.field textarea:invalid:not(:placeholder-shown) {
  border-color: #c0392b;
}
.field textarea { resize: vertical; min-height: 130px; }
.form-hint { font-size: 0.85rem; color: var(--color-text-soft); }
.form-status { padding: 0.9rem 1.1rem; border-radius: var(--radius-s); font-weight: 600; display: none; }
.form-status.is-visible { display: block; }
.form-status--success { background: #e4f4ea; color: #1e6b3a; }
.form-status--error { background: #fbe6e3; color: #a3311c; }

/* Honeypot field – must stay invisible to humans, reachable to bots */
.hp-field {
  position: absolute !important;
  left: -9999px !important;
  width: 1px; height: 1px;
  overflow: hidden;
}

/* ---------- Contact info card ---------- */
.contact-card {
  background: var(--color-anthrazit);
  color: #fff;
  border-radius: var(--radius-l);
  padding: var(--space-l);
  display: flex;
  flex-direction: column;
  gap: var(--space-m);
}
.contact-card a { color: var(--color-fensterblau); font-weight: 600; }
.contact-card__row { display: flex; gap: 0.85rem; align-items: flex-start; }
.contact-card__row svg { width: 1.4rem; height: 1.4rem; color: var(--color-gelb); flex-shrink: 0; margin-top: 0.15rem; }
.contact-card__mascot { align-self: flex-end; opacity: 0.9; }
.contact-card__mascot img { height: 110px; width: auto; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-anthrazit);
  color: #cfd6d7;
}
.site-footer a:hover { color: var(--color-gelb); }
.footer-top {
  padding-block: var(--space-l);
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: var(--space-l);
}
.footer-brand img { height: 72px; width: auto; margin-bottom: 0.8rem; }
.footer-brand p { color: #a9b2b3; max-width: 32ch; }
.footer-col h4 { color: #fff; font-size: 1rem; margin-bottom: 0.9rem; }
.footer-col ul { display: flex; flex-direction: column; gap: 0.55rem; }
.footer-col a { color: #cfd6d7; }
.footer-social {
  display: inline-flex; align-items: center; gap: 0.5rem;
  margin-top: 0.5rem;
  color: var(--color-fensterblau);
  font-weight: 600;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-block: 1.1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.5rem;
  justify-content: space-between;
  font-size: 0.85rem;
  color: #97a1a2;
}
.footer-bottom ul { display: flex; gap: 1.4rem; }
@media (max-width: 800px) {
  .footer-top { grid-template-columns: 1fr; }
}

/* ---------- Impressum ---------- */
.legal h2 { margin-top: var(--space-l); margin-bottom: 0.6rem; }
.legal p, .legal li { color: var(--color-text-soft); }
.legal a { color: var(--color-petrol); font-weight: 600; }
.legal .placeholder { color: var(--color-mahagoni); font-weight: 700; background: #fbeee0; padding: 0.05em 0.4em; border-radius: 4px; }

/* ---------- Misc utility ---------- */
.text-center { text-align: center; }
.mt-l { margin-top: var(--space-l); }
.stack { display: flex; flex-direction: column; gap: var(--space-s); }
.eyebrow-list { display: flex; flex-wrap: wrap; gap: 0.5rem 1.4rem; color: var(--color-text-soft); font-weight: 600; }