/* ==========================================================================
   components.css — Buttons, Cards, Navigation, Footer, FAQ, Stats
   Richter Kommunikation — AEO & KI-Beratung
   ========================================================================== */

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.75rem 1.75rem;
  border: 2px solid transparent;
  border-radius: var(--border-radius);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  text-decoration: none;
  transition:
    background-color var(--transition-base),
    color var(--transition-base),
    border-color var(--transition-base),
    transform var(--transition-fast),
    box-shadow var(--transition-base);
  white-space: nowrap;
  -webkit-user-select: none;
  user-select: none;
}

.btn:hover {
  transform: translateY(-1px);
  text-decoration: none;
}

.btn:active {
  transform: translateY(0);
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent-primary);
  outline-offset: 3px;
}

/* Primary Button */
.btn-primary {
  background-color: var(--color-accent-primary);
  color: #0D0D0D; /* Always dark text on teal — never use variable */
  border-color: var(--color-accent-primary);
}

.btn-primary:hover {
  background-color: #00eec0;
  border-color: #00eec0;
  color: #0D0D0D;
  box-shadow: var(--shadow-accent);
}

.btn-primary:active {
  background-color: #00b891;
  border-color: #00b891;
}

/* Secondary Button */
.btn-secondary {
  background-color: transparent;
  color: var(--color-accent-primary);
  border-color: var(--color-accent-primary);
}

.btn-secondary:hover {
  background-color: var(--color-accent-primary);
  color: #0D0D0D;
  box-shadow: var(--shadow-accent);
}

/* Ghost Button */
.btn-ghost {
  background-color: transparent;
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

.btn-ghost:hover {
  border-color: var(--color-accent-primary);
  color: var(--color-accent-primary);
}

/* Large Button */
.btn-large {
  padding: 1rem 2.5rem;
  font-size: 1.125rem;
}

/* Small Button */
.btn-small {
  padding: 0.5rem 1.25rem;
  font-size: 0.875rem;
  border-radius: var(--border-radius-sm);
}

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */

.card {
  background-color: var(--color-bg-secondary);
  border-radius: var(--border-radius);
  padding: var(--space-md);
  border: 1px solid var(--color-border);

  /* Glassmorphism */
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);

  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: rgba(0, 212, 170, 0.3);
}

.card-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
  color: var(--color-text-primary);
}

.card-body {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  line-height: 1.6;
}

.card-footer {
  margin-top: var(--space-sm);
  padding-top: var(--space-sm);
  border-top: 1px solid var(--color-border);
}

/* Accent Card — left border highlight */
.card-accent {
  border-left: 4px solid var(--color-accent-primary);
}

/* --------------------------------------------------------------------------
   Site Navigation
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background-color: var(--color-overlay);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-base);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem var(--space-md);
  gap: var(--space-md);
}

.nav-logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 2rem;
  text-decoration: none;
  letter-spacing: -0.01em;
  flex-shrink: 0;
  transition: opacity var(--transition-fast);
}

.nav-logo .logo-cite {
  color: var(--color-text-primary);
}

.nav-logo .logo-wert {
  color: var(--color-accent-primary);
}

.nav-logo:hover {
  opacity: 0.85;
  text-decoration: none;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-links li {
  display: flex;
  margin: 0;
}

.nav-link {
  display: flex;
  align-items: center;
  padding: 0.5rem 0.875rem;
  color: var(--color-text-primary);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
  line-height: 1.5;
  height: 2.5rem;
  border-radius: var(--border-radius-sm);
  transition:
    color var(--transition-fast),
    background-color var(--transition-fast);
}

.nav-link:hover {
  color: var(--color-accent-primary);
  background-color: rgba(0, 212, 170, 0.08);
  text-decoration: none;
}

.nav-link.active {
  color: var(--color-accent-primary);
}

.nav-link.active::after {
  display: block;
  content: '';
  height: 2px;
  background: var(--color-accent-primary);
  margin-top: 2px;
  border-radius: 1px;
}

/* CTA link in nav */
.nav-link.nav-cta {
  background-color: var(--color-accent-primary);
  color: #0D0D0D;
  font-weight: 600;
  padding: 0.5rem 1.25rem;
}

.nav-link.nav-cta:hover {
  background-color: #00eec0;
  color: #0D0D0D;
}

/* Theme Toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  color: var(--color-text-primary);
  cursor: pointer;
  font-size: 1.1rem;
  transition:
    border-color var(--transition-fast),
    color var(--transition-fast),
    background-color var(--transition-fast);
  flex-shrink: 0;
}

.theme-toggle:hover {
  border-color: var(--color-accent-primary);
  color: var(--color-accent-primary);
  background-color: rgba(0, 212, 170, 0.08);
}

/* Hamburger — Mobile */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 2.5rem;
  height: 2.5rem;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  padding: 0.5rem;
  flex-shrink: 0;
  transition: border-color var(--transition-fast);
}

.hamburger:hover {
  border-color: var(--color-accent-primary);
}

.hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text-primary);
  border-radius: 1px;
  transition: transform var(--transition-base), opacity var(--transition-base);
  transform-origin: center;
}

/* Hamburger — Open state */
.hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

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

/* Mobile Navigation */
@media (max-width: 767px) {
  .hamburger {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: 0;
    width: min(320px, 85vw);
    height: 100vh;
    height: 100dvh;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background-color: var(--color-bg-secondary);
    border-left: 1px solid var(--color-border);
    padding: 5rem var(--space-md) var(--space-md);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    overflow-y: auto;
    z-index: var(--z-nav);
  }

  .nav-links.active {
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
  }

  .nav-links li {
    display: block;
    width: 100%;
    margin: 0;
  }

  .nav-link {
    display: block;
    width: 100%;
    height: auto;
    padding: 0.875rem var(--space-sm);
    font-size: 1.0625rem;
    border-radius: var(--border-radius-sm);
    border-bottom: 1px solid var(--color-border);
  }

  .nav-link.active::after {
    display: none;
  }

  .nav-link.nav-cta {
    margin-top: var(--space-sm);
    text-align: center;
    border-bottom: none;
  }
}

/* Mobile nav overlay */
.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: calc(var(--z-nav) - 1);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.nav-overlay.active {
  display: block;
  opacity: 1;
}

/* --------------------------------------------------------------------------
   Site Footer
   -------------------------------------------------------------------------- */

.site-footer {
  background-color: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: var(--space-lg) 0 var(--space-md);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

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

.footer-brand .nav-logo,
.footer-logo {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.25rem;
  text-decoration: none;
  margin-bottom: var(--space-sm);
  display: inline-block;
}

.footer-logo .logo-cite {
  color: var(--color-text-primary);
}

.footer-logo .logo-wert {
  color: var(--color-accent-primary);
}

.footer-brand p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  max-width: 35ch;
  margin-top: var(--space-xs);
}

.footer-heading,
.footer-col h4 {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
}

.footer-links {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-links a {
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-accent-primary);
  text-decoration: none;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-sm);
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border);
}

.footer-copyright {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

.footer-legal {
  display: flex;
  gap: var(--space-md);
  list-style: none;
  padding: 0;
  flex-wrap: wrap;
}

.footer-legal a {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* --------------------------------------------------------------------------
   FAQ Accordion
   -------------------------------------------------------------------------- */

.faq-list {
  list-style: none;
  padding: 0;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item:first-child {
  border-top: 1px solid var(--color-border);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  width: 100%;
  padding: var(--space-sm) 0;
  background: transparent;
  border: none;
  color: var(--color-text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
  text-align: left;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.faq-question:hover {
  color: var(--color-accent-primary);
}

.faq-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  min-width: 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  color: var(--color-accent-primary);
  font-size: 1rem;
  font-weight: 300;
  line-height: 1;
  transition:
    transform var(--transition-base),
    border-color var(--transition-fast),
    background-color var(--transition-fast);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background-color: var(--color-accent-primary);
  border-color: var(--color-accent-primary);
  color: #0D0D0D;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding var(--transition-base);
  padding-bottom: 0;
}

.faq-answer-inner {
  padding-bottom: var(--space-sm);
  color: var(--color-text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.faq-answer-inner p {
  max-width: none;
}

.faq-answer-inner p + p {
  margin-top: 0.75rem;
}

.faq-answer-inner a {
  color: var(--color-accent-primary);
}

.faq-item.active .faq-answer {
  max-height: 1200px;
  padding-bottom: 0;
}

/* --------------------------------------------------------------------------
   Stat Blocks
   -------------------------------------------------------------------------- */

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

.stat-number {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(3rem, 6vw, 5rem);
  font-weight: 700;
  color: var(--color-accent-primary);
  line-height: 1;
  letter-spacing: -0.02em;
}

.stat-label {
  display: block;
  font-size: 1rem;
  color: var(--color-text-secondary);
  margin-top: 0.5rem;
  line-height: 1.4;
}

/* --------------------------------------------------------------------------
   Section Utilities
   -------------------------------------------------------------------------- */

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

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

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

.section-header {
  margin-bottom: var(--space-lg);
}

.section-label {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent-primary);
  margin-bottom: var(--space-sm);
}

.section-title {
  margin-bottom: var(--space-sm);
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 60ch;
}

/* --------------------------------------------------------------------------
   Badge / Tag
   -------------------------------------------------------------------------- */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  background-color: rgba(0, 212, 170, 0.12);
  color: var(--color-accent-primary);
  border: 1px solid rgba(0, 212, 170, 0.25);
}

.badge-secondary {
  background-color: rgba(255, 51, 102, 0.12);
  color: var(--color-accent-secondary);
  border-color: rgba(255, 51, 102, 0.25);
}

/* --------------------------------------------------------------------------
   Alert / Notification Banner
   -------------------------------------------------------------------------- */

.alert {
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--border-radius);
  border-left: 4px solid var(--color-accent-primary);
  background-color: rgba(0, 212, 170, 0.06);
  color: var(--color-text-primary);
  font-size: 0.9375rem;
}

.alert-warning {
  border-left-color: var(--color-accent-secondary);
  background-color: rgba(255, 51, 102, 0.06);
}

/* --------------------------------------------------------------------------
   Cookie Banner
   -------------------------------------------------------------------------- */

.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: var(--z-modal);
  background-color: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: var(--space-md);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transform: translateY(100%);
  transition: transform var(--transition-base);
}

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

.cookie-banner-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.cookie-banner p {
  font-size: 0.9375rem;
  color: var(--color-text-secondary);
  max-width: 60ch;
}

.cookie-banner-actions {
  display: flex;
  gap: var(--space-xs);
  flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   Breadcrumb
   -------------------------------------------------------------------------- */

.breadcrumb {
  padding: var(--space-sm) 0;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
}

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

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

.breadcrumb-sep {
  margin: 0 0.5rem;
  color: var(--color-text-secondary);
  opacity: 0.5;
}

.breadcrumb-current {
  color: var(--color-text-primary);
}