/* ============================================
   CYNOA Information Systems Hong-Huhn GbR – Website Stylesheet
   Basierend auf docs/styleguide.md
   ============================================ */

/* --- CSS Custom Properties --- */
:root {
  /* Primärfarben */
  --color-primary: #2F5C9A;
  --color-primary-hover: #416CA4;

  /* Sekundärfarben */
  --color-secondary: #7C99B7;
  --color-secondary-light: #9FB2C5;

  /* Neutralfarben */
  --color-white: #FFFFFF;
  --color-off-white: #F7F9FC;
  --color-light-gray: #E6EBF2;
  --color-mid-gray: #A7AFB7;
  --color-dark-gray: #4A4F55;

  /* Textfarben */
  --color-text: #1F2A36;
  --color-text-secondary: #4A4F55;
  --color-text-light: #FFFFFF;

  /* Borders */
  --color-border: #D6DEE8;

  /* Footer */
  --color-footer-bg: #1F2A36;
  --color-footer-text: #FFFFFF;
  --color-footer-text-secondary: #D6DEE8;
  --color-footer-link-hover: #9FB2C5;

  /* Layout */
  --container-max: 1140px;
  --header-height: 72px;

  /* Typografie */
  --font-family: 'Inter', 'Source Sans Pro', 'Open Sans', 'Roboto', sans-serif;
  --font-size-base: 16px;
  --line-height-base: 1.7;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Abstände */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 40px;
  --spacing-xl: 64px;
  --spacing-2xl: 96px;

  /* Radien */
  --radius: 6px;
  --radius-lg: 10px;

  /* Schatten */
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
}

/* --- Reset & Grundlagen --- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 20px);
  scrollbar-gutter: stable;
  height: 100%;
}

body {
  font-family: var(--font-family);
  font-size: 1rem;
  line-height: var(--line-height-base);
  color: var(--color-text);
  background-color: var(--color-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

main {
  flex: 1;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--color-primary-hover);
}

a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
  border-radius: 2px;
}

ul, ol {
  list-style: none;
}

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* --- Typografie --- */
h1, h2, h3, h4 {
  color: var(--color-text);
  font-weight: var(--font-weight-bold);
  line-height: 1.25;
}

h1 {
  font-size: 2.5rem;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-md);
}

h2 {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-sm);
}

h3 {
  font-size: 1.25rem;
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--spacing-xs);
}

p {
  margin-bottom: var(--spacing-sm);
}

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

/* --- Buttons --- */
.btn {
  display: inline-block;
  padding: 12px 28px;
  font-family: var(--font-family);
  font-size: 1rem;
  font-weight: var(--font-weight-semibold);
  line-height: 1.5;
  text-align: center;
  text-decoration: none;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-text-light);
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  color: var(--color-text-light);
}

.btn-secondary {
  background-color: var(--color-white);
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-secondary:hover {
  background-color: var(--color-off-white);
  color: var(--color-primary);
}

/* --- Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-light-gray);
  height: var(--header-height);
}

section[id] {
  scroll-margin-top: var(--header-height);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.header-logo a {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.header-logo img {
  height: 40px;
  width: auto;
}

/* --- Navigation --- */
.main-nav ul {
  display: flex;
  gap: var(--spacing-md);
}

.main-nav a {
  color: var(--color-text);
  font-weight: var(--font-weight-medium);
  font-size: 0.95rem;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* --- Hamburger-Menü --- */
.hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  flex-direction: column;
  gap: 5px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.hamburger.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.open span:nth-child(2) {
  opacity: 0;
}

.hamburger.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Sprachumschalter --- */
.lang-switch {
  position: relative;
}

.lang-switch select {
  appearance: none;
  background-color: var(--color-off-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 6px 36px 6px 12px;
  font-family: var(--font-family);
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  cursor: pointer;
}

.lang-switch select:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 1px;
}

.lang-switch::after {
  content: "";
  position: absolute;
  right: 10px;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid var(--color-text);
  pointer-events: none;
}

/* --- Sektionen --- */
.section {
  padding: var(--spacing-xl) 0;
}

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

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.section-header p {
  color: var(--color-text-secondary);
  font-size: 1.1rem;
  max-width: 680px;
  margin: var(--spacing-sm) auto 0;
}

/* --- Hero --- */
.hero {
  padding: var(--spacing-2xl) 0;
  text-align: center;
}

.hero h1 {
  font-size: 2.75rem;
  max-width: 780px;
  margin: 0 auto var(--spacing-md);
}

.hero .lead {
  font-size: 1.2rem;
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0 auto var(--spacing-lg);
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
}

/* --- Karten-Grid --- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

.card-grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-off-white);
  border: 1px solid var(--color-light-gray);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg) var(--spacing-md);
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.2s ease;
}

.card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.card h3 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.card p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  margin-bottom: var(--spacing-md);
}

.card .btn {
  font-size: 0.9rem;
  padding: 8px 20px;
  align-self: flex-start;
  margin-top: auto;
}

/* --- Vorteile-Grid --- */
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg) var(--spacing-md);
}

.benefit h3 {
  color: var(--color-text);
  margin-bottom: var(--spacing-xs);
}

.benefit p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
}

/* --- Teaser-Sektion --- */
.teaser {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.teaser p {
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  margin-bottom: var(--spacing-md);
}

/* --- Kontakt-Sektion --- */
.contact-section {
  text-align: center;
}

.contact-section p {
  color: var(--color-text-secondary);
  font-size: 1.05rem;
}

.contact-section .email {
  display: inline-block;
  font-size: 1.1rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  margin: var(--spacing-sm) 0 var(--spacing-md);
}

/* --- Kompetenz-Listen --- */
.competence-list {
  list-style: none;
  padding: 0;
}

.competence-list li {
  position: relative;
  padding-left: 24px;
  margin-bottom: var(--spacing-xs);
  color: var(--color-text-secondary);
}

.competence-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-primary);
}

/* --- Profil-Karten --- */
.profile-card {
  display: flex;
  gap: var(--spacing-lg);
  align-items: flex-start;
  margin-bottom: var(--spacing-xl);
}

.profile-card img {
  width: 180px;
  height: 180px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  flex-shrink: 0;
}

.profile-card h3 {
  font-size: 1.5rem;
  color: var(--color-text);
  margin-bottom: 4px;
}

.profile-card .title {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  margin-bottom: var(--spacing-sm);
}

.profile-card h4 {
  font-size: 1rem;
  font-weight: var(--font-weight-semibold);
  margin-top: var(--spacing-md);
  margin-bottom: var(--spacing-xs);
}

.profile-card ul {
  list-style: disc;
  padding-left: 20px;
}

.profile-card li {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  margin-bottom: 4px;
}

/* --- Partner-Karten --- */
.partner-card {
  padding: 0;
  margin-bottom: var(--spacing-lg);
}

.partner-logo {
  height: 48px;
  width: auto;
  margin-bottom: var(--spacing-sm);
}

.partner-card h3 {
  color: var(--color-primary);
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xs);
}

.partner-card .partner-url {
  font-size: 0.9rem;
  margin-bottom: var(--spacing-sm);
}

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

/* --- Rechtliche Seiten --- */
.legal-content h2 {
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  font-size: 1.5rem;
}

.legal-content h3 {
  margin-top: var(--spacing-md);
  font-size: 1.15rem;
}

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

.legal-content ul {
  list-style: disc;
  padding-left: 20px;
  margin-bottom: var(--spacing-sm);
}

.legal-content li {
  color: var(--color-text-secondary);
  margin-bottom: 4px;
}

.legal-content address {
  font-style: normal;
  line-height: 1.8;
}

/* --- Footer --- */
.site-footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding-top: var(--spacing-xl);
}

.footer-main {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75cm;
  padding-bottom: var(--spacing-lg);
}

.footer-brand a {
  display: inline-flex;
  align-items: center;
  color: var(--color-footer-text);
}

.footer-brand img {
  height: 135px;
  width: auto;
  border-radius: var(--radius-lg);
  background-color: var(--color-white);
  padding: 8px 12px;
  box-sizing: content-box;
}

.footer-contact .company-name {
  display: block;
  font-weight: var(--font-weight-bold);
  font-size: 1.25rem;
  color: var(--color-footer-text);
  margin-bottom: var(--spacing-sm);
}

.footer-contact h3 {
  color: var(--color-footer-text);
  font-size: 1.2rem;
  margin-bottom: var(--spacing-sm);
}

.footer-contact address {
  font-style: normal;
  color: var(--color-footer-text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
}

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

.footer-contact a:hover {
  color: var(--color-footer-link-hover);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.875rem;
}

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

.footer-legal {
  display: flex;
  gap: var(--spacing-md);
}

.footer-legal a {
  color: var(--color-footer-text-secondary);
  transition: color 0.2s ease;
}

.footer-legal a:hover {
  color: var(--color-footer-link-hover);
}

/* --- Responsive: Tablet (max 960px) --- */
@media (max-width: 960px) {
  h1 {
    font-size: 2rem;
  }

  .hero h1 {
    font-size: 2.25rem;
  }

  .card-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
  }

  .benefits-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .profile-card {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .profile-card ul {
    text-align: left;
    display: inline-block;
  }
}

/* --- Responsive: Mobil (max 640px) --- */
@media (max-width: 640px) {
  :root {
    --header-height: 60px;
  }

  h1 {
    font-size: 1.75rem;
  }

  h2 {
    font-size: 1.4rem;
  }

  .hero {
    padding: var(--spacing-lg) 0 var(--spacing-md);
  }

  .hero h1 {
    font-size: 1.85rem;
  }

  .hero .lead {
    font-size: 1.05rem;
  }

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

  .hero + .section {
    padding-top: var(--spacing-sm);
  }

  /* Header mobil */
  .hamburger {
    display: flex;
    order: 3;
  }

  .lang-switch {
    margin-left: auto;
    margin-right: var(--spacing-sm);
    order: 2;
  }

  .lang-switch select {
    padding: 6px 24px 6px 8px;
    font-size: 1.1rem;
  }

  .lang-switch::after {
    right: 6px;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-light-gray);
    padding: var(--spacing-sm) 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  }

  .main-nav.open {
    display: block;
  }

  .main-nav ul {
    flex-direction: column;
    align-items: center;
    gap: 0;
  }

  .main-nav li {
    width: 100%;
  }

  .main-nav a {
    display: block;
    padding: 12px var(--spacing-md);
    text-align: center;
    border-bottom: none;
  }

  .main-nav a:hover,
  .main-nav a.active {
    background-color: var(--color-off-white);
    border-bottom: none;
  }

  /* Karten */
  .benefits-grid {
    grid-template-columns: 1fr;
  }

  /* Hero Buttons */
  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .hero-actions .btn {
    width: 100%;
    max-width: 320px;
  }

  /* Footer */
  .footer-main {
    flex-direction: column;
    gap: var(--spacing-lg);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-sm);
    text-align: center;
  }

  .footer-legal {
    justify-content: center;
  }

  /* Profil */
  .profile-card img {
    width: 140px;
    height: 140px;
  }
}

/* --- Barrierefreiheit --- */
.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;
}

/* Skip-to-content Link */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--spacing-sm);
  background: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius);
  z-index: 200;
  font-weight: var(--font-weight-semibold);
}

.skip-link:focus {
  top: var(--spacing-xs);
  color: var(--color-white);
}

/* Fokus-Stile */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}