/* ==========================================================================
   KRS Website - Design System
   Brand Book: /operations/knowledge/branding/brand-book.md
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design Tokens (CSS Custom Properties)
   -------------------------------------------------------------------------- */

:root {
  /* Primary Colors (30% of surface) */
  --krs-nachtblau: #1A365D;
  --krs-anthrazit: #2D3748;

  /* Secondary Colors (20% of surface) */
  --krs-bernstein: #C27B2D;
  --krs-sandstein: #E8DED1;

  /* Accent Colors (10% of surface) */
  --krs-signal: #2F855A;
  --krs-fokus: #744210;

  /* Neutral Colors (40% of surface) */
  --krs-weiss: #FFFFFF;
  --krs-hell: #F7FAFC;

  /* Semantic Colors */
  --color-text-primary: var(--krs-anthrazit);
  --color-text-secondary: #718096;
  --color-text-on-dark: var(--krs-hell);
  --color-background: var(--krs-weiss);
  --color-surface: var(--krs-hell);

  /* Typography */
  --font-headline: 'IBM Plex Serif', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  /* Font Sizes - Responsive with clamp() */
  --text-h1: clamp(1.75rem, 5vw, 3rem);       /* 28-48px */
  --text-h2: clamp(1.5rem, 4vw, 2rem);        /* 24-32px */
  --text-h3: clamp(1.25rem, 3vw, 1.5rem);     /* 20-24px */
  --text-h4: 1.25rem;                          /* 20px */
  --text-body: 1.125rem;                       /* 18px - Zielgruppe 50+ */
  --text-small: 0.875rem;                      /* 14px */
  --text-button: 1rem;                         /* 16px */

  /* Line Heights */
  --leading-tight: 1.2;
  --leading-snug: 1.35;
  --leading-normal: 1.6;

  /* Font Weights */
  --weight-regular: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;

  /* Spacing */
  --space-xs: 0.25rem;    /* 4px */
  --space-sm: 0.5rem;     /* 8px */
  --space-md: 1rem;       /* 16px */
  --space-lg: 1.5rem;     /* 24px */
  --space-xl: 2rem;       /* 32px */
  --space-2xl: 3rem;      /* 48px */
  --space-3xl: 4rem;      /* 64px */
  --space-section: 5rem;  /* 80px */

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.15);

  /* Transitions */
  --transition-fast: 150ms ease-out;
  --transition-default: 200ms ease-out;
  --transition-slow: 300ms ease-out;

  /* Layout */
  --container-max: 1200px;
  --container-narrow: 800px;
  --nav-height: 72px;
}

/* --------------------------------------------------------------------------
   2. Reset & Base Styles
   -------------------------------------------------------------------------- */

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  font-family: var(--font-body);
  font-size: var(--text-body);
  font-weight: var(--weight-regular);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

/* --------------------------------------------------------------------------
   3. Typography
   -------------------------------------------------------------------------- */

h1, h2, h3 {
  font-family: var(--font-headline);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-tight);
  color: var(--krs-nachtblau);
}

h4, h5, h6 {
  font-family: var(--font-body);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-snug);
  color: var(--krs-nachtblau);
}

h1 { font-size: var(--text-h1); }
h2 { font-size: var(--text-h2); }
h3 { font-size: var(--text-h3); }
h4 { font-size: var(--text-h4); }

p {
  margin-bottom: var(--space-md);
}

p:last-child {
  margin-bottom: 0;
}

.text-secondary {
  color: var(--color-text-secondary);
}

.text-center {
  text-align: center;
}

/* --------------------------------------------------------------------------
   4. Layout Components
   -------------------------------------------------------------------------- */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

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

.section {
  padding: var(--space-section) 0;
}

.section--dark {
  background-color: var(--krs-nachtblau);
  color: var(--color-text-on-dark);
}

.section--dark h1,
.section--dark h2,
.section--dark h3,
.section--dark h4 {
  color: var(--color-text-on-dark);
}

.section--sand {
  background-color: var(--krs-sandstein);
}

.section--light {
  background-color: var(--krs-hell);
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid--2 { grid-template-columns: 1fr; }
.grid--3 { grid-template-columns: 1fr; }
.grid--4 { grid-template-columns: 1fr; }

@media (min-width: 768px) {
  .grid--2 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .grid--3 { grid-template-columns: repeat(3, 1fr); }
  .grid--4 { grid-template-columns: repeat(4, 1fr); }
}

/* --------------------------------------------------------------------------
   5. Components
   -------------------------------------------------------------------------- */

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  font-family: var(--font-body);
  font-size: var(--text-button);
  font-weight: var(--weight-medium);
  line-height: 1;
  text-decoration: none;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-default);
  min-height: 44px; /* Touch target */
  min-width: 44px;
}

.btn--primary {
  background-color: var(--krs-nachtblau);
  color: var(--color-text-on-dark);
}

.btn--primary:hover {
  background-color: var(--krs-anthrazit);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn--secondary {
  background-color: transparent;
  color: var(--krs-nachtblau);
  border: 2px solid var(--krs-nachtblau);
}

.btn--secondary:hover {
  background-color: var(--krs-nachtblau);
  color: var(--color-text-on-dark);
}

.btn--accent {
  background-color: var(--krs-bernstein);
  color: var(--krs-weiss);
}

.btn--accent:hover {
  background-color: var(--krs-fokus);
  transform: translateY(-2px);
}

.btn--light {
  background-color: var(--krs-weiss);
  color: var(--krs-nachtblau);
}

.btn--light:hover {
  background-color: var(--krs-hell);
  transform: translateY(-2px);
}

/* Cards */
.card {
  background-color: var(--krs-weiss);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-default);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.card--bordered {
  border-left: 4px solid var(--krs-nachtblau);
}

.card--bordered-accent {
  border-left: 4px solid var(--krs-bernstein);
}

.card__icon {
  width: 48px;
  height: 48px;
  background-color: var(--krs-nachtblau);
  color: var(--color-text-on-dark);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--space-md);
}

.card__title {
  font-size: var(--text-h4);
  margin-bottom: var(--space-sm);
}

.card__text {
  color: var(--color-text-secondary);
}

/* Cards with Modal - Styled like Modal */
.card--has-modal {
  display: flex;
  flex-direction: column;
  padding: 0;
  overflow: hidden;
}

.card__header {
  background: linear-gradient(135deg, var(--krs-nachtblau) 0%, #2d4a6f 100%);
  padding: var(--space-md) var(--space-lg);
  position: relative;
}

.card__header::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--krs-bernstein);
}

.card--has-modal .card__title {
  color: var(--krs-weiss);
  margin: 0;
  font-size: var(--text-h4);
}

.card__body {
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  flex: 1;
}

.card__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  margin-top: auto;
  padding: var(--space-sm) var(--space-md);
  padding-bottom: 0;
  background: transparent;
  border: none;
  color: var(--krs-bernstein);
  cursor: pointer;
  font-size: var(--text-small);
  font-family: var(--font-body);
  font-weight: var(--weight-semibold);
  transition: color var(--transition-default);
}

.card__toggle:hover {
  color: var(--krs-fokus);
}

.card__toggle-icon {
  width: 1rem;
  height: 1rem;
}

/* Modal Overlay */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  padding: var(--space-lg);
}

.modal-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: var(--krs-weiss);
  border-radius: var(--radius-lg);
  padding: 0;
  max-width: 600px;
  width: 100%;
  max-height: 80vh;
  overflow: hidden;
  position: relative;
  transform: scale(0.9) translateY(20px);
  transition: transform 0.3s ease;
  box-shadow: var(--shadow-xl);
}

.modal-overlay.is-open .modal {
  transform: scale(1) translateY(0);
}

/* Modal Header - Gradient mit Bernstein-Akzent */
.modal__header {
  background: linear-gradient(135deg, var(--krs-nachtblau) 0%, #2d4a6f 100%);
  padding: var(--space-lg) var(--space-2xl);
  position: relative;
}

.modal__header::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--krs-bernstein);
}

.modal__title {
  font-family: var(--font-headline);
  font-size: var(--text-h3);
  color: var(--krs-weiss);
  margin: 0;
  padding-right: var(--space-2xl);
}

.modal__close {
  position: absolute;
  top: 50%;
  right: var(--space-lg);
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  color: rgba(255, 255, 255, 0.8);
  padding: var(--space-xs);
  border-radius: var(--radius-sm);
  transition: color var(--transition-default), background var(--transition-default);
}

.modal__close:hover {
  color: var(--krs-weiss);
  background: rgba(255, 255, 255, 0.1);
}

/* Modal Body */
.modal__body {
  padding: var(--space-xl) var(--space-2xl);
  max-height: calc(80vh - 80px);
  overflow-y: auto;
}

/* Modal Content Styles */
.modal__content p {
  margin-bottom: var(--space-md);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
}

.modal__content p:last-child {
  margin-bottom: 0;
}

.modal__intro {
  font-size: var(--text-body);
  color: var(--krs-anthrazit);
  margin-bottom: var(--space-lg);
}

/* Highlight Box mit Bernstein-Akzent */
.modal__highlight {
  background: var(--krs-hell);
  border-left: 4px solid var(--krs-bernstein);
  padding: var(--space-lg);
  margin: var(--space-lg) 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.modal__highlight-title {
  font-weight: var(--weight-semibold);
  color: var(--krs-anthrazit);
  margin-bottom: var(--space-sm);
}

/* Liste mit Checkmarks */
.modal__list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.modal__list li {
  position: relative;
  padding-left: var(--space-lg);
  margin-bottom: var(--space-xs);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
}

.modal__list li:last-child {
  margin-bottom: 0;
}

.modal__list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--krs-signal);
  font-weight: bold;
}

/* Body scroll lock when modal is open */
body.modal-open {
  overflow: hidden;
}

/* Video Container */
.video-container {
  max-width: 800px;
  margin: 0 auto;
}

.video-wrapper {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
  height: 0;
  overflow: hidden;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
}

.video-wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

/* Stats */
.stat {
  text-align: center;
  padding: var(--space-lg);
}

.stat__source {
  font-size: var(--text-small);
  color: var(--color-text-secondary);
  margin-top: var(--space-sm);
  font-style: italic;
}

.section--dark .stat__source {
  color: var(--color-text-on-dark);
  opacity: 0.7;
}

.stat__number {
  font-family: var(--font-headline);
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: var(--weight-bold);
  color: var(--krs-nachtblau);
  line-height: 1;
  margin-bottom: var(--space-sm);
}

.stat__label {
  font-size: var(--text-small);
  color: var(--color-text-secondary);
}

.section--dark .stat__number {
  color: var(--krs-bernstein);
}

.section--dark .stat__label {
  color: var(--color-text-on-dark);
  opacity: 0.9;
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: var(--container-narrow);
  margin: 0 auto var(--space-3xl);
}

.section-header__tag {
  display: inline-block;
  padding: var(--space-sm) var(--space-md);
  background-color: var(--krs-sandstein);
  color: var(--krs-nachtblau);
  font-size: var(--text-small);
  font-weight: var(--weight-semibold);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-md);
}

.section--dark .section-header__tag {
  background-color: rgba(255, 255, 255, 0.15);
  color: var(--color-text-on-dark);
}

.section-header__title {
  margin-bottom: var(--space-md);
}

.section-header__subtitle {
  color: var(--color-text-secondary);
  font-size: var(--text-body);
}

.section--dark .section-header__subtitle {
  color: var(--color-text-on-dark);
  opacity: 0.85;
}

/* --------------------------------------------------------------------------
   6. Top Bar (One-Pager Style - sichtbar wenn ganz oben)
   -------------------------------------------------------------------------- */

.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  z-index: 1001;
  display: flex;
  align-items: center;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.topbar--hidden {
  transform: translateY(-100%);
  opacity: 0;
}

.topbar__container {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  padding-bottom: 16px;
  height: 100%;
}

.topbar__logo {
  display: flex;
  align-items: flex-end;
  gap: 4px;
  text-decoration: none;
}

.topbar__logo img {
  height: 40px;
  width: auto;
}

.topbar__company {
  font-family: var(--font-headline);
  font-size: 1rem;
  font-weight: var(--weight-medium);
  color: var(--krs-nachtblau);
  display: none;
  line-height: 1;
  padding-bottom: 3px;
}

@media (min-width: 640px) {
  .topbar__company {
    display: block;
  }
}

.topbar__claim {
  font-family: var(--font-headline);
  font-size: 1rem;
  color: var(--krs-nachtblau);
  display: none;
  line-height: 1;
  padding-bottom: 3px;
}

@media (min-width: 768px) {
  .topbar__claim {
    display: block;
  }
}

/* --------------------------------------------------------------------------
   6b. Navigation (erscheint beim Scrollen)
   -------------------------------------------------------------------------- */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background-color: var(--krs-weiss);
  box-shadow: var(--shadow-md);
  z-index: 1000;
  display: flex;
  align-items: center;
  transform: translateY(-100%);
  transition: transform 0.3s ease;
}

.nav--visible {
  transform: translateY(0);
}

.nav__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.nav__logo img {
  height: 40px;
  width: auto;
}

.nav__menu {
  display: none;
  align-items: center;
  gap: var(--space-xl);
}

@media (min-width: 768px) {
  .nav__menu {
    display: flex;
  }
}

.nav__link {
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
  transition: color var(--transition-fast);
  padding: var(--space-sm) 0;
}

.nav__link:hover {
  color: var(--krs-nachtblau);
}

.nav__cta {
  margin-left: var(--space-md);
}

/* Mobile Menu Button */
.nav__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--krs-nachtblau);
}

@media (min-width: 768px) {
  .nav__toggle {
    display: none;
  }
}

.nav__toggle svg {
  width: 24px;
  height: 24px;
}

/* Mobile Menu */
.nav__mobile {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--krs-weiss);
  padding: var(--space-lg);
  z-index: 999;
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: transform var(--transition-slow), opacity var(--transition-slow), visibility var(--transition-slow);
}

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

.nav__mobile-link {
  display: block;
  padding: var(--space-md);
  font-size: var(--text-body);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
  border-bottom: 1px solid var(--krs-sandstein);
}

.nav__mobile-cta {
  margin-top: var(--space-lg);
  width: 100%;
  text-align: center;
}

/* --------------------------------------------------------------------------
   7. Hero Section
   -------------------------------------------------------------------------- */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  background-image:
    linear-gradient(
      to right,
      rgba(26, 54, 93, 0.88),
      rgba(26, 54, 93, 0.75)
    ),
    url('../images/hero-bg.jpg');
  background-size: cover;
  background-position: center right;
}

.hero__content {
  max-width: var(--container-narrow);
  margin: 0 auto;
  text-align: center;
  padding: var(--space-2xl) 0;
}

.hero__title {
  margin-bottom: var(--space-lg);
  color: var(--color-text-on-dark);
}

.hero__title span {
  color: var(--krs-bernstein);
}

.hero__subtitle {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-2xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero__cta {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  align-items: center;
}

/* Hero-spezifische Button-Styles für bessere Lesbarkeit auf dunklem Hintergrund */
.hero__cta .btn--primary {
  background-color: var(--krs-bernstein);
  color: var(--krs-weiss);
}

.hero__cta .btn--primary:hover {
  background-color: #D4883A;
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(194, 123, 45, 0.4);
}

.hero__cta .btn--secondary {
  background-color: transparent;
  color: var(--krs-weiss);
  border: 2px solid var(--krs-weiss);
}

.hero__cta .btn--secondary:hover {
  background-color: var(--krs-weiss);
  color: var(--krs-nachtblau);
}

@media (min-width: 768px) {
  .hero__cta {
    flex-direction: row;
    justify-content: center;
  }
}

/* --------------------------------------------------------------------------
   8. Process Steps
   -------------------------------------------------------------------------- */

.process-step {
  text-align: center;
  padding: var(--space-lg);
}

.process-step__number {
  width: 60px;
  height: 60px;
  background-color: var(--krs-nachtblau);
  color: var(--color-text-on-dark);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-headline);
  font-size: 1.5rem;
  font-weight: var(--weight-bold);
  margin: 0 auto var(--space-md);
}

.process-step__title {
  margin-bottom: var(--space-sm);
}

.process-step__text {
  color: var(--color-text-secondary);
  font-size: var(--text-body);
}

/* --------------------------------------------------------------------------
   9. Team Section
   -------------------------------------------------------------------------- */

.team-member {
  text-align: center;
  background-color: var(--krs-weiss);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.team-member__avatar {
  width: 100px;
  height: 100px;
  background-color: var(--krs-nachtblau);
  color: var(--color-text-on-dark);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-headline);
  font-size: 2rem;
  font-weight: var(--weight-bold);
  margin: 0 auto var(--space-lg);
}

.team-member__photo {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--krs-nachtblau);
  margin: 0 auto var(--space-lg);
  display: block;
  transition: transform var(--transition-default);
}

.team-member__link:hover .team-member__photo {
  transform: scale(1.05);
}

.team-member__name {
  margin-bottom: var(--space-xs);
}

.team-member__role {
  color: var(--krs-bernstein);
  font-weight: var(--weight-semibold);
  margin-bottom: var(--space-md);
}

.team-member__bio {
  color: var(--color-text-secondary);
  font-size: var(--text-body);
}

.team-member__link {
  display: block;
  text-decoration: none;
  color: inherit;
  transition: opacity var(--transition-fast);
}

.team-member__link:hover {
  opacity: 0.8;
}

.team-member__link .team-member__avatar {
  transition: transform var(--transition-default);
}

.team-member__link:hover .team-member__avatar {
  transform: scale(1.05);
}

/* --------------------------------------------------------------------------
   10. CTA Section
   -------------------------------------------------------------------------- */

.cta-section {
  text-align: center;
}

.cta-section__title {
  margin-bottom: var(--space-md);
}

.cta-section__subtitle {
  opacity: 0.9;
  margin-bottom: var(--space-md);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* Contact Options */
.cta-section__contact-options {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  margin-top: var(--space-xl);
  flex-wrap: wrap;
}

.cta-contact-btn {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--krs-nachtblau);
  background: var(--krs-weiss);
  text-decoration: none;
  font-family: var(--font-body);
  font-size: var(--text-body);
  font-weight: var(--weight-medium);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-default);
  box-shadow: var(--shadow-sm);
}

.cta-contact-btn:hover {
  background: var(--krs-bernstein);
  color: var(--krs-weiss);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.cta-contact-btn svg {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

@media (max-width: 768px) {
  .cta-section__contact-options {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-md);
    max-width: 320px;
    margin-left: auto;
    margin-right: auto;
  }

  .cta-contact-btn {
    justify-content: center;
  }
}

/* Contact Modal */
.contact-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.contact-modal.is-open {
  opacity: 1;
  visibility: visible;
}

.contact-modal__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(26, 54, 93, 0.8);
  backdrop-filter: blur(4px);
}

.contact-modal__content {
  position: relative;
  background: var(--krs-weiss);
  border-radius: var(--radius-lg);
  max-width: 400px;
  width: 90%;
  box-shadow: var(--shadow-xl);
  transform: scale(0.9) translateY(20px);
  transition: transform 0.3s ease;
  overflow: hidden;
}

.contact-modal.is-open .contact-modal__content {
  transform: scale(1) translateY(0);
}

/* Blue header bar */
.contact-modal__header-bar {
  background: linear-gradient(135deg, var(--krs-nachtblau) 0%, #2d4a6f 100%);
  padding: var(--space-md) var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
}

.contact-modal__header-bar::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--krs-bernstein);
}

.contact-modal__header-title {
  color: var(--krs-weiss);
  font-family: var(--font-headline);
  font-size: var(--text-h4);
  font-weight: var(--weight-semibold);
}

.contact-modal__close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--krs-weiss);
  padding: var(--space-xs);
  border-radius: var(--radius-sm);
  transition: all var(--transition-default);
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-modal__close:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Profile section */
.contact-modal__profile {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-xl);
  text-align: center;
  border-bottom: 1px solid var(--krs-sandstein);
}

.contact-modal__photo {
  display: block;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--krs-bernstein);
  margin: 0 auto var(--space-md);
}

.contact-modal__name {
  display: block;
  font-family: var(--font-headline);
  font-size: var(--text-h3);
  font-weight: var(--weight-semibold);
  color: #1A365D !important;
  margin: 0 0 var(--space-xs);
  line-height: 1.2;
}

.contact-modal__role {
  display: block;
  color: var(--color-text-secondary);
  font-size: var(--text-body);
  margin: 0;
}

/* Contact links */
.contact-modal__body {
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.contact-modal__link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--krs-nachtblau);
  text-decoration: none;
  padding: var(--space-md);
  background: var(--krs-hell);
  border-radius: var(--radius-md);
  transition: all var(--transition-default);
  font-size: var(--text-body);
}

.contact-modal__link:hover {
  background: var(--krs-bernstein);
  color: var(--krs-weiss);
}

.contact-modal__link svg {
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   11. Footer
   -------------------------------------------------------------------------- */

.footer {
  background-color: var(--krs-anthrazit);
  color: var(--color-text-on-dark);
  padding: var(--space-3xl) 0 var(--space-xl);
}

/* Minimal Footer Variant */
.footer--minimal {
  padding: var(--space-lg) 0;
}

.footer__minimal {
  text-align: center;
  color: var(--color-text-on-dark);
  font-size: var(--text-small);
  margin: 0;
}

.footer__minimal a {
  color: var(--color-text-on-dark);
  text-decoration: none;
  transition: color var(--transition-default);
}

.footer__minimal a:hover {
  color: var(--krs-bernstein);
}

.footer__separator {
  margin: 0 var(--space-sm);
  opacity: 0.5;
}

.footer__grid {
  display: grid;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

@media (min-width: 768px) {
  .footer__grid {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

.footer__brand {
  margin-bottom: var(--space-md);
}

.footer__logo {
  height: 40px;
  margin-bottom: var(--space-md);
  filter: brightness(0) invert(1);
}

.footer__claim {
  font-family: var(--font-headline);
  font-size: var(--text-body);
  opacity: 0.9;
}

.footer__heading {
  font-size: var(--text-body);
  font-weight: var(--weight-semibold);
  margin-bottom: var(--space-md);
}

.footer__link {
  display: block;
  padding: var(--space-xs) 0;
  opacity: 0.8;
  transition: opacity var(--transition-fast);
}

.footer__link:hover {
  opacity: 1;
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-xl);
  text-align: center;
  font-size: var(--text-small);
  opacity: 0.7;
}

/* --------------------------------------------------------------------------
   12. Utilities
   -------------------------------------------------------------------------- */

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

.mt-0 { margin-top: 0; }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-0 { margin-bottom: 0; }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }

/* --------------------------------------------------------------------------
   13. Animation Keyframes
   -------------------------------------------------------------------------- */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(26, 54, 93, 0.4);
  }
  50% {
    box-shadow: 0 0 0 15px rgba(26, 54, 93, 0);
  }
}

@keyframes drawUnderline {
  from {
    stroke-dashoffset: 300;
  }
  to {
    stroke-dashoffset: 0;
  }
}

@keyframes bounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0) translateX(-50%);
  }
  40% {
    transform: translateY(-10px) translateX(-50%);
  }
  60% {
    transform: translateY(-5px) translateX(-50%);
  }
}

/* --------------------------------------------------------------------------
   14. Scroll Reveal System
   -------------------------------------------------------------------------- */

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

.reveal-delay-1 { transition-delay: 100ms; }
.reveal-delay-2 { transition-delay: 200ms; }
.reveal-delay-3 { transition-delay: 300ms; }
.reveal-delay-4 { transition-delay: 400ms; }

.reveal-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal-left.is-visible,
.reveal-right.is-visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.95);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

@media (prefers-reduced-motion: reduce) {
  .reveal,
  .reveal-left,
  .reveal-right,
  .reveal-scale {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .reveal.is-visible,
  .reveal-left.is-visible,
  .reveal-right.is-visible,
  .reveal-scale.is-visible {
    transform: none;
  }
}

/* --------------------------------------------------------------------------
   15. Counter Animation
   -------------------------------------------------------------------------- */

.stat__number[data-counter] {
  font-variant-numeric: tabular-nums;
}

.stat__number.is-counting {
  color: var(--krs-bernstein);
  transition: color 0.3s ease-out;
}

.stat__number.is-counted {
  color: var(--krs-nachtblau);
}

.section--dark .stat__number.is-counted {
  color: var(--krs-bernstein);
}

/* --------------------------------------------------------------------------
   16. Hero Enhancements
   -------------------------------------------------------------------------- */

.hero {
  position: relative;
}

.hero__title-highlight {
  color: var(--krs-bernstein);
  font-weight: var(--weight-bold);
}

.hero__stats {
  display: flex;
  justify-content: center;
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.hero__stat {
  text-align: center;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s ease-out forwards;
}

.hero__stat:nth-child(1) { animation-delay: 0.6s; }
.hero__stat:nth-child(2) { animation-delay: 0.8s; }
.hero__stat:nth-child(3) { animation-delay: 1.0s; }

.hero__stat-number {
  font-family: var(--font-headline);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: var(--weight-bold);
  color: var(--krs-bernstein);
  line-height: 1;
}

.hero__stat-label {
  font-size: var(--text-small);
  color: rgba(255, 255, 255, 0.85);
  margin-top: var(--space-xs);
}

@media (max-width: 640px) {
  .hero__stats {
    flex-direction: column;
    gap: var(--space-md);
  }
}

.hero__scroll-indicator {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--text-small);
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.6s ease-out;
}

.hero__scroll-indicator.is-visible {
  opacity: 1;
  animation: bounce 2s infinite;
}

.hero__scroll-indicator svg {
  width: 24px;
  height: 24px;
}

/* --------------------------------------------------------------------------
   17. Process Timeline
   -------------------------------------------------------------------------- */

.process-timeline {
  position: relative;
  margin-bottom: var(--space-2xl);
}

.timeline-weeks {
  display: flex;
  justify-content: center;
  gap: var(--space-xs);
  margin-bottom: var(--space-lg);
}

.timeline-week {
  width: 40px;
  height: 8px;
  background-color: var(--krs-sandstein);
  border-radius: var(--radius-sm);
  position: relative;
  overflow: hidden;
}

.timeline-week::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--krs-nachtblau) 0%, var(--krs-bernstein) 100%);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease-out;
}

.timeline-week.is-filled::after {
  transform: scaleX(1);
}

.timeline-week:nth-child(1).is-filled::after { transition-delay: 0ms; }
.timeline-week:nth-child(2).is-filled::after { transition-delay: 100ms; }
.timeline-week:nth-child(3).is-filled::after { transition-delay: 200ms; }
.timeline-week:nth-child(4).is-filled::after { transition-delay: 300ms; }
.timeline-week:nth-child(5).is-filled::after { transition-delay: 400ms; }
.timeline-week:nth-child(6).is-filled::after { transition-delay: 500ms; }
.timeline-week:nth-child(7).is-filled::after { transition-delay: 600ms; }
.timeline-week:nth-child(8).is-filled::after { transition-delay: 700ms; }

.timeline-labels {
  display: flex;
  justify-content: space-between;
  max-width: 400px;
  margin: 0 auto;
  font-size: var(--text-small);
  color: var(--color-text-secondary);
}

.process-grid {
  position: relative;
}

.process-step__phase {
  font-size: var(--text-small);
  color: var(--krs-bernstein);
  font-weight: var(--weight-semibold);
  margin-top: var(--space-sm);
}

.process-step.is-visible .process-step__number {
  animation: pulse 2s ease-in-out;
}

.process-step__number {
  transition: box-shadow 0.3s ease-out, transform 0.3s ease-out;
}

.process-step:hover .process-step__number {
  transform: scale(1.1);
  box-shadow: 0 0 0 8px rgba(26, 54, 93, 0.15);
}

/* --------------------------------------------------------------------------
   Process Flow (neue Ablauf-Sektion)
   -------------------------------------------------------------------------- */

.process-flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: stretch;
  gap: var(--space-md);
}

@media (max-width: 1024px) {
  .process-flow {
    grid-template-columns: 1fr;
    gap: 0;
  }

  /* Pfeile drehen: nach unten zeigen */
  .process-arrow {
    padding: var(--space-md) 0;
    justify-content: flex-start;
    padding-left: var(--space-xl);
  }

  .process-arrow svg {
    transform: rotate(90deg);
  }
}

/* Process Card */
.process-card {
  background: var(--krs-weiss);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: all var(--transition-default);
  display: flex;
  flex-direction: column;
}

.process-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.process-card__header {
  background: linear-gradient(135deg, var(--krs-nachtblau) 0%, #2d4a6f 100%);
  padding: var(--space-md) var(--space-lg);
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
}

.process-card__header::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--krs-bernstein);
}

.process-card__number {
  width: 36px;
  height: 36px;
  background: var(--krs-bernstein);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-headline);
  font-weight: var(--weight-bold);
  color: var(--krs-weiss);
  flex-shrink: 0;
  font-size: 1.1rem;
  margin-top: 2px;
}

.process-card__header-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  flex: 1;
  min-width: 0;
}

.process-card__title {
  color: var(--krs-weiss);
  font-size: 1.1rem;
  margin: 0;
  font-family: var(--font-headline);
}

.process-card__duration {
  font-size: var(--text-small);
  color: rgba(255,255,255,0.7);
}

.process-card__body {
  padding: var(--space-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.process-card__text {
  color: var(--color-text-secondary);
  margin: 0;
  font-size: var(--text-body);
  line-height: var(--leading-normal);
}

/* Process Arrow */
.process-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--krs-bernstein);
  padding: 0 var(--space-xs);
}

.process-arrow svg {
  width: 28px;
  height: 28px;
}

/* --------------------------------------------------------------------------
   18. Comparison Table
   -------------------------------------------------------------------------- */

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  background-color: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.comparison-table th,
.comparison-table td {
  padding: var(--space-md) var(--space-lg);
  text-align: left;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.comparison-table th {
  font-weight: var(--weight-semibold);
  color: var(--color-text-on-dark);
  background-color: rgba(255, 255, 255, 0.05);
}

.comparison-table th:first-child {
  color: var(--color-text-on-dark);
  opacity: 0.8;
}

.comparison-table th:last-child {
  color: var(--krs-bernstein);
}

.comparison-table td:first-child {
  font-weight: var(--weight-medium);
  color: var(--color-text-on-dark);
  opacity: 0.9;
}

.comparison-table td:nth-child(2) {
  color: var(--color-text-on-dark);
  opacity: 0.6;
}

.comparison-table td:last-child {
  color: var(--krs-bernstein);
  font-weight: var(--weight-medium);
}

.comparison-table tr:last-child td {
  border-bottom: none;
}

.comparison-table tbody tr {
  transition: background-color var(--transition-fast);
}

.comparison-table tbody tr:hover {
  background-color: rgba(255, 255, 255, 0.05);
}

@media (max-width: 640px) {
  .comparison-table th,
  .comparison-table td {
    padding: var(--space-sm) var(--space-md);
    font-size: var(--text-small);
  }
}

/* --------------------------------------------------------------------------
   19. Enhanced Hover Effects
   -------------------------------------------------------------------------- */

.card {
  will-change: transform, box-shadow;
}

.card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-8px);
}

.card__icon {
  transition: transform var(--transition-default), background-color var(--transition-default);
}

.card:hover .card__icon {
  transform: rotate(-5deg) scale(1.1);
  background-color: var(--krs-bernstein);
}

.team-member {
  transition: transform var(--transition-default), box-shadow var(--transition-default);
}

.team-member:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.btn:focus-visible {
  outline: 3px solid var(--krs-bernstein);
  outline-offset: 2px;
}

.nav__link {
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--krs-bernstein);
  transition: width var(--transition-default);
}

.nav__link:hover::after {
  width: 100%;
}

/* --------------------------------------------------------------------------
   Solution Hero
   -------------------------------------------------------------------------- */

.solution-hero {
  background: var(--krs-nachtblau);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl) var(--space-xl);
  text-align: center;
  margin-bottom: var(--space-2xl);
}

/* Einleitung */
.solution-hero__intro {
  font-family: var(--font-headline);
  font-size: var(--text-h2);
  color: var(--krs-weiss);
  margin-bottom: var(--space-2xl);
  line-height: var(--leading-snug);
}

/* Zwei Benefits Grid */
.solution-hero__benefits {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}

@media (max-width: 600px) {
  .solution-hero__benefits {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }
}

.solution-hero__benefit {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
}

.solution-hero__number {
  font-family: var(--font-headline);
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: var(--weight-bold);
  color: var(--krs-bernstein);
  line-height: 1;
}

.solution-hero__label {
  font-size: var(--text-body);
  color: var(--krs-weiss);
  margin-top: var(--space-xs);
}

.solution-hero__contrast {
  font-size: var(--text-small);
  color: rgba(255, 255, 255, 0.6);
  margin-top: var(--space-sm);
}

.solution-hero__contrast .stat-with-source {
  color: var(--krs-weiss);
}

/* Legacy classes (can be removed later) */
.solution-hero__comparison {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  flex-wrap: wrap;
}

.solution-hero__item {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.solution-hero__item--muted .solution-hero__number {
  color: var(--color-text-on-dark);
  opacity: 0.5;
}

.solution-hero__vs {
  font-size: var(--text-body);
  color: var(--color-text-on-dark);
  opacity: 0.5;
  font-style: italic;
}

.solution-hero__claim {
  margin-top: var(--space-lg);
  font-family: var(--font-headline);
  font-size: var(--text-h3);
  color: var(--krs-weiss);
  font-weight: var(--weight-medium);
}

.solution-hero__effectiveness {
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-lg);
  flex-wrap: wrap;
  font-size: var(--text-body);
  color: var(--color-text-on-dark);
}

.solution-hero__eff-separator {
  opacity: 0.4;
}

.solution-hero__highlight {
  color: var(--krs-bernstein);
  font-weight: var(--weight-semibold);
}

/* --------------------------------------------------------------------------
   Stat with Source - Enhanced Tooltip
   -------------------------------------------------------------------------- */

.stat-with-source {
  position: relative;
  cursor: help;
}

.stat-with-source::before {
  /* Haupttext + Trennlinie + Quelle */
  content: attr(data-tooltip) '\A────────────────────\A' attr(data-source);
  white-space: pre-wrap;

  /* Positionierung */
  position: absolute;
  bottom: calc(100% + 12px);
  left: 50%;
  transform: translateX(-50%);

  /* Dimensionen */
  width: max-content;
  max-width: 340px;
  padding: var(--space-md) var(--space-lg);

  /* Design */
  background: var(--krs-anthrazit);
  color: var(--krs-weiss);
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);

  /* Typography */
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: var(--weight-regular);
  line-height: 1.6;
  text-align: left;

  /* Animation */
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s ease-out;
  z-index: 1000;
  pointer-events: none;
}

.stat-with-source:hover::before {
  opacity: 1;
  visibility: visible;
}

/* Responsive */
@media (max-width: 640px) {
  .stat-with-source::before {
    max-width: 280px;
    font-size: 0.85rem;
    padding: var(--space-sm) var(--space-md);
  }
}