/* =========================================================================
   Nordlicht Webdesign – Stylesheet
   Inhalt:
   1. Custom Properties (Design-Tokens)
   2. Reset & Basiselemente
   3. Layout-Hilfsklassen
   4. Barrierefreiheit (Skip-Link, Fokus)
   5. Header & Navigation
   6. Buttons
   7. Hero
   8. Section-Heading
   9. Karten (Leistungen)
   10. Feature-Grid (Vorteile)
   11. Ablauf (Steps)
   12. Über uns
   13. FAQ
   14. Kontakt & Formular
   15. Footer
   16. Scroll-Reveal-Animation
   17. Illustrationen (Inline-SVG)
   18. Reduced Motion
   ========================================================================= */

/* ---------- 1. Custom Properties ---------------------------------------- */
:root {
  /* Farben */
  --color-ink-900: #0f172a;
  --color-ink-700: #334155;
  --color-ink-500: #64748b;
  --color-ink-300: #cbd5e1;
  --color-ink-200: #e2e8f0;
  --color-ink-100: #f1f5f9;
  --color-white: #ffffff;

  --color-accent-700: #0f766e;
  --color-accent-600: #0d9488;
  --color-accent-500: #14b8a6;
  --color-accent-100: #ccfbf1;
  --color-accent-050: #f0fdfa;

  --color-danger-600: #dc2626;
  --color-danger-100: #fee2e2;

  --color-bg: var(--color-white);
  --color-bg-alt: var(--color-ink-100);
  --color-text: var(--color-ink-700);
  --color-heading: var(--color-ink-900);
  --color-muted: var(--color-ink-500);
  --color-border: var(--color-ink-200);

  /* Typografie */
  --font-base: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  --font-size-sm: clamp(0.8125rem, 0.78rem + 0.15vw, 0.875rem);
  --font-size-base: clamp(1rem, 0.97rem + 0.15vw, 1.0625rem);
  --font-size-lg: clamp(1.125rem, 1.06rem + 0.3vw, 1.25rem);
  --font-size-xl: clamp(1.375rem, 1.25rem + 0.6vw, 1.75rem);
  --font-size-2xl: clamp(1.75rem, 1.5rem + 1.2vw, 2.5rem);
  --font-size-3xl: clamp(2.25rem, 1.85rem + 2vw, 3.25rem);
  --line-height-tight: 1.2;
  --line-height-base: 1.6;

  /* Abstände */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;

  /* Radien & Schatten */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-full: 999px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06), 0 1px 3px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.12);

  /* Layout */
  --container-max: 1200px;
  --container-narrow: 780px;
  --container-padding: clamp(1.25rem, 1rem + 2vw, 2.5rem);
  --header-height: 76px;

  /* Bewegung */
  --transition-fast: 150ms ease;
  --transition-base: 220ms ease;
  --transition-slow: 420ms ease;
}

/* ---------- 2. Reset & Basiselemente ------------------------------------ */
*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
}

html {
  scroll-padding-top: calc(var(--header-height) + var(--space-4));
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  min-height: 100svh;
  font-family: var(--font-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
}

img,
picture,
svg {
  display: block;
  max-width: 100%;
}

h1, h2, h3, h4 {
  color: var(--color-heading);
  line-height: var(--line-height-tight);
  font-weight: 700;
  text-wrap: balance;
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-lg); }

p {
  max-width: 68ch;
}

a {
  color: var(--color-accent-700);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--color-accent-600);
}

ul, ol {
  list-style: none;
  padding: 0;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

input,
textarea,
select {
  font: inherit;
  color: inherit;
}

/* ---------- 3. Layout-Hilfsklassen --------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.section {
  padding-block: var(--space-9);
}

.section--alt {
  background-color: var(--color-bg-alt);
}

.eyebrow {
  display: inline-block;
  font-size: var(--font-size-sm);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-accent-700);
  margin-block-end: var(--space-3);
}

/* ---------- 4. Barrierefreiheit ------------------------------------------ */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 1000;
  padding: var(--space-3) var(--space-5);
  background-color: var(--color-ink-900);
  color: var(--color-white);
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: top var(--transition-base);
}

.skip-link:focus-visible {
  top: var(--space-4);
}

:focus-visible {
  outline: 3px solid var(--color-accent-600);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ---------- 5. Header & Navigation --------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

/* Als eigenes Pseudo-Element statt direkt auf .site-header: backdrop-filter auf
   einem Vorfahren von .main-nav (position: fixed) würde sonst einen neuen
   Containing Block erzeugen und das mobile Menü auf Header-Höhe zusammenschrumpfen. */
.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-sm);
  border-bottom-color: var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: var(--header-height);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-weight: 700;
  font-size: var(--font-size-lg);
  color: var(--color-heading);
  text-decoration: none;
  flex-shrink: 0;
}

.brand:hover {
  color: var(--color-heading);
}

.brand__mark-bg {
  fill: var(--color-accent-600);
}

.brand__mark-line {
  stroke: var(--color-accent-050);
}

.brand__text-accent {
  color: var(--color-accent-600);
  font-weight: 700;
}

/* Mobiles Menü-Icon */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.nav-toggle:hover {
  background-color: var(--color-ink-100);
}

.nav-toggle__box {
  display: inline-flex;
  flex-direction: column;
  gap: 5px;
  width: 22px;
}

.nav-toggle__bar {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--color-ink-900);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Navigation: mobil = Overlay-Panel, ab Breakpoint = Inline-Leiste */
.main-nav {
  position: fixed;
  top: var(--header-height);
  right: 0;
  left: 0;
  /* Fallback für Browser ohne dvh-Unterstützung */
  height: calc(100vh - var(--header-height));
  /* dvh berücksichtigt die tatsächlich sichtbare Fläche, auch wenn die
     Adressleiste des mobilen Browsers ein-/ausgeblendet wird – ohne dvh
     ragt das Menü sonst unbemerkt über den sichtbaren Bereich hinaus. */
  height: calc(100dvh - var(--header-height));
  background-color: var(--color-white);
  padding: var(--space-6) var(--container-padding);
  overflow-y: auto;
  transform: translateY(-8px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
}

.main-nav.is-open {
  opacity: 1;
  transform: translateY(0);
  visibility: visible;
}

.main-nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  max-width: var(--container-max);
  margin-inline: auto;
}

.main-nav__link {
  display: block;
  padding: var(--space-4) var(--space-2);
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-heading);
  text-decoration: none;
  border-bottom: 1px solid var(--color-border);
  transition: color var(--transition-fast);
}

.main-nav__link:hover {
  color: var(--color-accent-600);
}

.main-nav__link.is-active {
  color: var(--color-accent-700);
}

.main-nav__link--cta {
  border-bottom: none;
}

@media (min-width: 860px) {
  .nav-toggle {
    display: none;
  }

  .main-nav {
    position: static;
    top: auto;
    right: auto;
    left: auto;
    height: auto;
    padding: 0;
    background: none;
    transform: none;
    opacity: 1;
    visibility: visible;
    overflow: visible;
  }

  .main-nav__list {
    flex-direction: row;
    align-items: center;
    gap: var(--space-6);
  }

  .main-nav__link {
    padding: var(--space-2) 0;
    font-size: var(--font-size-base);
    border-bottom: none;
    position: relative;
  }

  .main-nav__link:not(.main-nav__link--cta)::after {
    content: "";
    position: absolute;
    left: 0;
    right: 100%;
    bottom: -4px;
    height: 2px;
    background-color: var(--color-accent-600);
    border-radius: var(--radius-full);
    transition: right var(--transition-base);
  }

  .main-nav__link:not(.main-nav__link--cta):hover::after,
  .main-nav__link.is-active::after {
    right: 0;
  }

  .main-nav__link--cta {
    padding: var(--space-2) var(--space-5);
    background-color: var(--color-accent-600);
    color: var(--color-white);
    border-radius: var(--radius-full);
    font-weight: 600;
    transition: background-color var(--transition-fast);
  }

  .main-nav__link--cta:hover {
    background-color: var(--color-accent-700);
    color: var(--color-white);
  }
}

/* ---------- 6. Buttons ---------------------------------------------------- */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 48px;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--font-size-base);
  text-decoration: none;
  border: 2px solid transparent;
  transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
}

.button--primary {
  background-color: var(--color-accent-600);
  color: var(--color-white);
  box-shadow: var(--shadow-sm);
}

.button--primary:hover {
  background-color: var(--color-accent-700);
  color: var(--color-white);
}

.button--secondary {
  background-color: transparent;
  color: var(--color-heading);
  border-color: var(--color-border);
}

.button--secondary:hover {
  border-color: var(--color-accent-600);
  color: var(--color-accent-700);
}

.button:active {
  transform: translateY(1px);
}

/* ---------- 7. Hero -------------------------------------------------------- */
.hero {
  padding-block: var(--space-8) var(--space-9);
}

.hero__inner {
  display: grid;
  gap: var(--space-8);
  align-items: center;
}

.hero__lead {
  font-size: var(--font-size-lg);
  color: var(--color-text);
  margin-block-start: var(--space-4);
  max-width: 52ch;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-block-start: var(--space-6);
}

.hero__trust {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
  margin-block-start: var(--space-6);
  font-size: var(--font-size-sm);
  color: var(--color-muted);
}

.hero__trust li {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.hero__trust-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: var(--radius-full);
  background-color: var(--color-accent-100);
  color: var(--color-accent-700);
  font-size: 0.75rem;
  font-weight: 700;
}

.hero__visual {
  width: 100%;
}

.hero__illustration {
  width: 100%;
  height: auto;
  aspect-ratio: 6 / 5;
}

@media (min-width: 960px) {
  .hero__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
  }
}

/* ---------- 8. Section-Heading ---------------------------------------------- */
.section-heading {
  max-width: 62ch;
  margin-inline: auto;
  text-align: center;
  margin-block-end: var(--space-8);
}

.section-heading__lead {
  margin-block-start: var(--space-4);
  color: var(--color-muted);
  font-size: var(--font-size-lg);
  margin-inline: auto;
}

/* ---------- 9. Karten (Leistungen) ------------------------------------------ */
.card-grid {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .card-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent-500);
}

.card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background-color: var(--color-accent-050);
  color: var(--color-accent-700);
  margin-block-end: var(--space-4);
}

.card__icon svg {
  stroke: currentColor;
  fill: currentColor;
}

.card__title {
  margin-block-end: var(--space-2);
}

.card__text {
  color: var(--color-muted);
  font-size: var(--font-size-sm);
}

/* ---------- 10. Feature-Grid (Vorteile) -------------------------------------- */
.feature-grid {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.feature {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.feature__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  color: var(--color-accent-700);
  margin-block-end: var(--space-2);
}

.feature__icon svg {
  stroke: currentColor;
  fill: none;
}

.feature__text {
  color: var(--color-muted);
  font-size: var(--font-size-sm);
}

/* ---------- 11. Ablauf (Steps) ------------------------------------------------ */
.steps {
  display: grid;
  gap: var(--space-6);
  counter-reset: step;
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .steps {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .steps {
    grid-template-columns: repeat(4, 1fr);
  }
}

.steps__item {
  position: relative;
  padding: var(--space-6) var(--space-5) var(--space-5);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
}

.steps__number {
  display: inline-block;
  font-size: var(--font-size-xl);
  font-weight: 800;
  color: var(--color-accent-500);
  margin-block-end: var(--space-3);
}

.steps__title {
  margin-block-end: var(--space-2);
}

.steps__text {
  color: var(--color-muted);
  font-size: var(--font-size-sm);
}

/* ---------- 12. Über uns -------------------------------------------------------- */
.about {
  display: grid;
  gap: var(--space-8);
  align-items: center;
}

.about__illustration {
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 8;
}

.about__text {
  color: var(--color-text);
  margin-block-end: var(--space-4);
  max-width: 60ch;
}

.about__principles {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-block-start: var(--space-5);
}

.about__principles li {
  position: relative;
  padding-inline-start: var(--space-6);
  color: var(--color-text);
}

.about__principles li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  background-color: var(--color-accent-500);
}

@media (min-width: 900px) {
  .about {
    grid-template-columns: 0.9fr 1.1fr;
  }
}

/* ---------- 13. FAQ -------------------------------------------------------------- */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background-color: var(--color-white);
  padding-inline: var(--space-5);
}

.faq-item__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-block: var(--space-4);
  font-weight: 600;
  font-size: var(--font-size-base);
  color: var(--color-heading);
  cursor: pointer;
  list-style: none;
}

.faq-item__question::-webkit-details-marker {
  display: none;
}

.faq-item__icon {
  position: relative;
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

.faq-item__icon::before,
.faq-item__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background-color: var(--color-accent-700);
  border-radius: var(--radius-full);
}

.faq-item__icon::before {
  width: 14px;
  height: 2px;
  transform: translate(-50%, -50%);
}

.faq-item__icon::after {
  width: 2px;
  height: 14px;
  transform: translate(-50%, -50%);
  transition: transform var(--transition-base);
}

.faq-item[open] .faq-item__icon::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.faq-item__answer {
  padding-block-end: var(--space-5);
  color: var(--color-muted);
}

/* ---------- 14. Kontakt & Formular ------------------------------------------------ */
.contact {
  display: grid;
  gap: var(--space-8);
}

.contact__lead {
  color: var(--color-muted);
  margin-block-start: var(--space-4);
  font-size: var(--font-size-lg);
}

.contact__info {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-block-start: var(--space-6);
}

.contact__info-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-heading);
  margin-block-end: var(--space-1);
}

@media (min-width: 960px) {
  .contact {
    grid-template-columns: 0.8fr 1.2fr;
    align-items: start;
  }
}

.form {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
}

.form__row {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: 1fr;
}

@media (min-width: 560px) {
  .form__row {
    grid-template-columns: 1fr 1fr;
  }
}

.form__field {
  margin-block-end: var(--space-5);
}

.form__row .form__field {
  margin-block-end: 0;
}

.form__label {
  display: block;
  font-weight: 600;
  font-size: var(--font-size-sm);
  color: var(--color-heading);
  margin-block-end: var(--space-2);
}

.form__optional {
  font-weight: 400;
  color: var(--color-muted);
}

.form__input {
  width: 100%;
  min-height: 48px;
  padding: var(--space-3) var(--space-4);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  background-color: var(--color-white);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form__input:hover {
  border-color: var(--color-ink-500);
}

.form__input:focus-visible {
  border-color: var(--color-accent-600);
  box-shadow: 0 0 0 3px var(--color-accent-100);
}

.form__textarea {
  min-height: 140px;
  resize: vertical;
}

.form__input--select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpath d='M5 8 L10 13 L15 8'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--space-4) center;
  padding-inline-end: var(--space-8);
}

.form__field--checkbox {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-3);
  align-items: start;
}

.form__checkbox {
  width: 22px;
  height: 22px;
  margin-block-start: 2px;
  accent-color: var(--color-accent-600);
}

.form__label--checkbox {
  font-weight: 400;
  color: var(--color-text);
  font-size: var(--font-size-sm);
}

.form__error {
  min-height: 1.25em;
  margin-block-start: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-danger-600);
  font-weight: 600;
}

.form__input[aria-invalid="true"] {
  border-color: var(--color-danger-600);
}

.form__required-note {
  font-size: var(--font-size-sm);
  color: var(--color-muted);
  margin-block-end: var(--space-5);
}

.form__submit {
  width: 100%;
}

.form__submit:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

@media (min-width: 560px) {
  .form__submit {
    width: auto;
  }
}

/* Honeypot: für Sichtnutzer:innen unsichtbar, für Formulare weiterhin vorhanden. */
.form__honeypot {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  left: -9999px;
}

.form__status {
  margin-block-start: var(--space-5);
  padding: var(--space-4) var(--space-5);
  background-color: var(--color-accent-050);
  border: 1px solid var(--color-accent-500);
  border-radius: var(--radius-md);
  color: var(--color-ink-700);
  font-size: var(--font-size-sm);
}

.form__status--error {
  background-color: var(--color-danger-100);
  border-color: var(--color-danger-600);
}

/* ---------- 15. Footer -------------------------------------------------------------- */
.site-footer {
  background-color: var(--color-ink-900);
  color: var(--color-ink-300);
  padding-block-start: var(--space-8);
}

.site-footer__inner {
  display: grid;
  gap: var(--space-7);
  padding-block-end: var(--space-7);
  border-bottom: 1px solid rgba(226, 232, 240, 0.15);
}

.site-footer .brand__text,
.site-footer .brand {
  color: var(--color-white);
}

.site-footer__tagline {
  margin-block-start: var(--space-3);
  max-width: 32ch;
  color: var(--color-ink-300);
  font-size: var(--font-size-sm);
}

.site-footer__social {
  display: flex;
  gap: var(--space-3);
  margin-block-start: var(--space-5);
}

.site-footer__social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background-color: rgba(255, 255, 255, 0.08);
  color: var(--color-white);
  transition: background-color var(--transition-fast);
}

.site-footer__social a:hover {
  background-color: var(--color-accent-600);
}

.site-footer__social svg {
  fill: currentColor;
  stroke: currentColor;
}

.site-footer__heading {
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-white);
  margin-block-end: var(--space-4);
}

.site-footer__nav ul,
.site-footer__legal ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.site-footer__nav a,
.site-footer__legal a {
  color: var(--color-ink-300);
  text-decoration: none;
  font-size: var(--font-size-sm);
}

.site-footer__nav a:hover,
.site-footer__legal a:hover {
  color: var(--color-white);
}

@media (min-width: 720px) {
  .site-footer__inner {
    grid-template-columns: 1.4fr 1fr 1fr;
  }
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding-block: var(--space-5);
  font-size: var(--font-size-sm);
  color: var(--color-ink-500);
}

.back-to-top {
  color: var(--color-ink-300);
  text-decoration: none;
  font-weight: 600;
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.back-to-top:hover {
  color: var(--color-white);
}

/* ---------- 16. Scroll-Reveal-Animation ---------------------------------------------- */
/* Diese Klassen werden ausschließlich per JavaScript gesetzt (progressive
   enhancement). Ohne JavaScript bleiben alle Inhalte regulär sichtbar. */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 17. Illustrationen (Inline-SVG) ------------------------------------------- */
.illu__panel {
  fill: var(--color-white);
  stroke: var(--color-border);
  stroke-width: 1.5;
}

.illu__dot {
  fill: var(--color-ink-300);
}

.illu__bar {
  fill: var(--color-ink-900);
}

.illu__bar--muted {
  fill: var(--color-ink-200);
}

.illu__card {
  fill: var(--color-ink-100);
  stroke: var(--color-border);
  stroke-width: 1.5;
}

.illu__card--accent {
  fill: var(--color-accent-050);
  stroke: var(--color-accent-500);
}

.illu__chart {
  stroke: var(--color-accent-600);
}

.illu__float {
  fill: var(--color-white);
  stroke: var(--color-border);
  stroke-width: 1.5;
  filter: drop-shadow(0 6px 14px rgba(15, 23, 42, 0.12));
}

.illu__check {
  stroke: var(--color-accent-600);
}

.illu__float-text {
  fill: var(--color-ink-700);
}

.illu__float-text--muted {
  fill: var(--color-ink-300);
}

.illu__accent-circle {
  fill: var(--color-accent-100);
  opacity: 0.7;
}

/* ---------- 18. Reduced Motion -------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .card:hover {
    transform: none;
  }
}