/* ============================================================
   Zahlenfuchs — Website Styles
   Branding Guide v1.1 — Pädagogischer Ansatz, Schweiz
   ============================================================ */

/* --- CSS Custom Properties (Brand Tokens) --- */
:root {
  --color-fuchsrot:      #C0603A;
  --color-fuchsrot-dark: #a8512e;
  --color-waldgruen:   #5C7A4E;
  --color-bienenwachs: #F2D77E;
  --color-birkenweiss: #FAF7F0;
  --color-holzbraun:   #6B4C35;
  --color-steingrau:   #9A9087;

  --font-serif:  'Lora', Georgia, serif;
  --font-sans:   'Nunito', 'Arial Rounded MT Bold', Arial, sans-serif;

  --container-max: 1080px;
  --spacing-xs:   0.5rem;
  --spacing-sm:   1rem;
  --spacing-md:   2rem;
  --spacing-lg:   4rem;
  --spacing-xl:   6rem;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --transition: 200ms ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  color-scheme: light;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-birkenweiss);
  color: var(--color-holzbraun);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-fuchsrot);
  text-decoration: none;
  transition: opacity var(--transition);
}

a:hover {
  opacity: 0.75;
}

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

/* --- Typography --- */
h1, h2, h3 {
  font-family: var(--font-serif);
  color: var(--color-holzbraun);
  line-height: 1.3;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
}

h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

p {
  font-family: var(--font-sans);
  font-size: 1rem;
  color: var(--color-holzbraun);
  line-height: 1.75;
}

/* --- Skip Link --- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip-link:focus {
  position: fixed;
  top: var(--spacing-xs);
  left: var(--spacing-xs);
  width: auto;
  height: auto;
  overflow: visible;
  background: var(--color-fuchsrot);
  color: var(--color-birkenweiss);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-weight: 700;
  z-index: 9999;
}

/* --- Site Header --- */
.site-header {
  background: var(--color-birkenweiss);
  border-bottom: 1px solid rgba(107, 76, 53, 0.12);
  position: sticky;
  top: 0;
  z-index: 100;
  padding: var(--spacing-sm) 0;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
}

.logo {
  flex-shrink: 0;
}

.logo img {
  height: 56px;
  width: auto;
  display: block;
}

.logo a {
  display: block;
  line-height: 0;
}

.hero-illustration img {
  width: 160px;
  height: 160px;
  object-fit: contain;
}

.footer-logo img {
  height: 36px;
  width: auto;
  opacity: 0.75;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.main-nav a {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-holzbraun);
  letter-spacing: 0.02em;
}

.main-nav a:hover {
  color: var(--color-fuchsrot);
  opacity: 1;
}

.nav-cta {
  background: var(--color-fuchsrot);
  color: var(--color-birkenweiss) !important;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
  touch-action: manipulation;
}

.nav-cta:hover {
  background: var(--color-fuchsrot-dark);
  opacity: 1 !important;
}

/* --- Buttons --- */
.btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 700;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-sm);
  transition: background var(--transition), transform var(--transition);
  cursor: pointer;
  text-align: center;
  min-height: 44px;
  min-width: 44px;
  touch-action: manipulation;
}

.btn:hover {
  transform: translateY(-1px);
  opacity: 1;
}

.btn-primary {
  background: var(--color-fuchsrot);
  color: var(--color-birkenweiss);
}

.btn-primary:hover {
  background: var(--color-fuchsrot-dark);
}

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

.btn-secondary:hover {
  background: rgba(107, 76, 53, 0.08);
}

.btn-large {
  font-size: 1.15rem;
  padding: 1rem 2.5rem;
}

/* --- Hero Section --- */
.hero {
  padding: var(--spacing-xl) 0;
  background: linear-gradient(
    135deg,
    var(--color-birkenweiss) 0%,
    rgba(242, 215, 126, 0.18) 100%
  );
  border-bottom: 1px solid rgba(107, 76, 53, 0.08);
}

.hero .container {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--spacing-lg);
  align-items: center;
}

.hero-content {
  max-width: 620px;
}

.hero-content h1 {
  margin-bottom: var(--spacing-md);
}

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--color-steingrau);
  margin-bottom: var(--spacing-md);
  max-width: 540px;
}

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

.hero-illustration {
  display: flex;
  justify-content: center;
  align-items: center;
}

.fox-card {
  background: var(--color-birkenweiss);
  border: 1px solid rgba(107, 76, 53, 0.12);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  box-shadow: 0 4px 24px rgba(107, 76, 53, 0.08);
  max-width: 220px;
}

.fox-quote {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.95rem;
  color: var(--color-steingrau);
  text-align: center;
}

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

.section-warm {
  background: rgba(242, 215, 126, 0.15);
  border-top: 1px solid rgba(107, 76, 53, 0.08);
  border-bottom: 1px solid rgba(107, 76, 53, 0.08);
}

.section-intro {
  font-size: 1.1rem;
  color: var(--color-steingrau);
  max-width: 680px;
  margin-bottom: var(--spacing-lg);
}

/* --- Features Grid --- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.feature-card {
  background: var(--color-birkenweiss);
  border: 1px solid rgba(107, 76, 53, 0.1);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  box-shadow: 0 2px 12px rgba(107, 76, 53, 0.05);
  transition: box-shadow var(--transition), transform var(--transition);
}

.feature-card:hover {
  box-shadow: 0 6px 24px rgba(107, 76, 53, 0.1);
  transform: translateY(-2px);
}

.feature-icon {
  margin-bottom: var(--spacing-sm);
}

.feature-card h3 {
  font-size: 1.1rem;
  margin-bottom: var(--spacing-xs);
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--color-steingrau);
}

/* --- Principles (Kopf / Herz / Hand) --- */
.principles-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.principle {
  padding: var(--spacing-md);
  border-left: 3px solid var(--color-fuchsrot);
  background: rgba(250, 247, 240, 0.8);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.principle h3 {
  font-size: 1.4rem;
  color: var(--color-fuchsrot);
  margin-bottom: var(--spacing-xs);
}

.principle p {
  font-size: 0.95rem;
  color: var(--color-holzbraun);
}

/* --- Brand Quote --- */
.brand-quote {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.15rem;
  color: var(--color-holzbraun);
  border-left: 4px solid var(--color-bienenwachs);
  padding: var(--spacing-sm) var(--spacing-md);
  margin: 0;
  max-width: 720px;
  background: rgba(242, 215, 126, 0.2);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* --- Audience Grid --- */
.audience-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.audience-card {
  background: var(--color-birkenweiss);
  border: 1px solid rgba(107, 76, 53, 0.1);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  border-top: 4px solid var(--color-waldgruen);
}

.audience-card h3 {
  color: var(--color-waldgruen);
  margin-bottom: var(--spacing-xs);
}

.audience-card p {
  font-size: 0.95rem;
  color: var(--color-steingrau);
}

/* --- CTA Section --- */
.section-cta {
  background: var(--color-holzbraun);
  text-align: center;
}

.section-cta h2 {
  color: var(--color-birkenweiss);
  margin-bottom: var(--spacing-sm);
}

.section-cta p {
  color: rgba(250, 247, 240, 0.8);
  max-width: 500px;
  margin: 0 auto var(--spacing-md);
  font-size: 1.05rem;
}

.section-cta .btn-primary {
  background: var(--color-fuchsrot);
  font-size: 1.1rem;
  padding: 1rem 2.5rem;
  margin-bottom: var(--spacing-sm);
}

.section-cta .btn-primary:hover {
  background: var(--color-fuchsrot-dark);
}

.cta-note {
  font-size: 0.85rem;
  color: rgba(250, 247, 240, 0.55);
  margin-top: var(--spacing-sm);
}

/* --- Footer --- */
.site-footer {
  background: var(--color-birkenweiss);
  border-top: 1px solid rgba(107, 76, 53, 0.12);
  padding: var(--spacing-lg) 0 var(--spacing-md);
  text-align: center;
}

.footer-logo {
  display: flex;
  justify-content: center;
  margin-bottom: var(--spacing-sm);
}

.footer-tagline {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--color-steingrau);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--spacing-md);
}

.footer-nav {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
}

.footer-nav a {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-steingrau);
}

.footer-nav a:hover {
  color: var(--color-fuchsrot);
  opacity: 1;
}

.footer-legal {
  font-size: 0.8rem;
  color: var(--color-steingrau);
  opacity: 0.7;
}

/* --- Hamburger toggle button --- */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  color: var(--color-holzbraun);
  touch-action: manipulation;
  flex-shrink: 0;
}

.nav-toggle-icon {
  display: block;
  width: 24px;
  height: 2px;
  background: currentColor;
  position: relative;
  border-radius: 2px;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: '';
  display: block;
  width: 24px;
  height: 2px;
  background: currentColor;
  position: absolute;
  left: 0;
  border-radius: 2px;
  transition: transform var(--transition), top var(--transition);
}

.nav-toggle-icon::before { top: -7px; }
.nav-toggle-icon::after  { top:  7px; }

.nav-toggle[aria-expanded="true"] .nav-toggle-icon {
  background: transparent;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before {
  top: 0;
  transform: rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after {
  top: 0;
  transform: rotate(-45deg);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  :root {
    --spacing-xl: 3.5rem;
    --spacing-lg: 2.5rem;
  }

  .site-header .container {
    flex-direction: row;
    align-items: center;
    flex-wrap: wrap;
    gap: 0;
  }

  .logo {
    flex: 1;
  }

  .nav-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 44px;
    min-height: 44px;
  }

  .main-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 0;
    padding: var(--spacing-sm) 0;
    border-top: 1px solid rgba(107, 76, 53, 0.1);
    margin-top: var(--spacing-xs);
  }

  .main-nav.is-open {
    display: flex;
  }

  .main-nav a {
    padding: 0.6rem 0;
    border-bottom: 1px solid rgba(107, 76, 53, 0.06);
  }

  .main-nav .nav-cta {
    margin-top: var(--spacing-xs);
    text-align: center;
    border-bottom: none;
  }

  .hero .container {
    grid-template-columns: 1fr;
  }

  .hero-illustration {
    display: none;
  }

  .principles-list {
    grid-template-columns: 1fr;
  }

  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .features-grid {
    grid-template-columns: 1fr;
  }

  .audience-grid {
    grid-template-columns: 1fr;
  }
}

/* --- Focus / Accessibility --- */
:focus-visible {
  outline: 2px solid var(--color-fuchsrot);
  outline-offset: 3px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .btn,
  .feature-card {
    transition: none;
  }

  a, .nav-cta, .footer-nav a {
    transition: none;
  }
}