/* ========================================
   BB-Experte — Premium Expert Brand
   Mobile-First Responsive Design
   ======================================== */

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

:root {
  --color-bg: #FAFAF7;
  --color-bg-alt: #F3F1EC;
  --color-text: #1A1A1A;
  --color-text-light: #6B6B6B;
  --color-accent: #2D5A3D;
  --color-accent-light: #E8F0EA;
  --color-accent-hover: #1E3F2B;
  --color-border: #E5E3DE;
  --color-white: #FFFFFF;
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --max-width: 1200px;
  --section-padding: 3.5rem 1.5rem;
  --transition: all 0.3s ease;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

/* --- Typography --- */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
}

h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
}

h3 {
  font-size: clamp(1.3rem, 2.5vw, 1.6rem);
}

p {
  font-size: 1.05rem;
  color: var(--color-text-light);
  max-width: 680px;
}

.text-center p {
  margin-left: auto;
  margin-right: auto;
}

/* --- Utility --- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

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

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

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

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

.section-accent p {
  color: rgba(255, 255, 255, 0.85);
}

.label {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.section-accent .label {
  color: rgba(255, 255, 255, 0.7);
}

.spacer-sm { height: 0.75rem; }
.spacer-md { height: 1.5rem; }
.spacer-lg { height: 2rem; }

/* --- Buttons --- */
.btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 1rem 2.5rem;
  border: 1px solid transparent;
  border-radius: 0;
  cursor: pointer;
  transition: var(--transition);
  text-align: center;
}

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

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

.btn-outline {
  background-color: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.btn-outline:hover {
  background-color: var(--color-accent);
  color: var(--color-white);
}

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

.btn-white:hover {
  background-color: transparent;
  color: var(--color-white);
  border-color: var(--color-white);
}

/* --- Header / Navigation --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(250, 250, 247, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.2rem 1.5rem;
}

.logo {
  font-family: var(--font-serif);
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.logo span {
  color: var(--color-accent);
}

.nav-desktop {
  display: none;
  gap: 2.5rem;
  align-items: center;
}

.nav-desktop a {
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--color-text-light);
}

.nav-desktop a:hover {
  color: var(--color-accent);
}

.nav-desktop a.btn-primary {
  color: var(--color-white);
}

.nav-desktop .btn {
  padding: 0.7rem 1.8rem;
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 1.5px;
  background-color: var(--color-text);
  transition: var(--transition);
}

.menu-toggle.active span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.active span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* Mobile Navigation */
.nav-mobile {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-bg);
  z-index: 999;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  padding: 2rem;
}

.nav-mobile.active {
  display: flex;
}

.nav-mobile a {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  color: var(--color-text);
}

.nav-mobile a:hover {
  color: var(--color-accent);
}

/* --- Hero Section --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 8rem 1.5rem 5rem;
}

.hero-content {
  max-width: 800px;
}

.hero h1 {
  margin-bottom: 1.5rem;
}

.hero p {
  font-size: 1.15rem;
  margin: 0 auto 2.5rem;
  max-width: 600px;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
}

/* --- Feature Grid --- */
.features-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-top: 2rem;
}

.feature-card {
  padding: 2.5rem 2rem;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.feature-card:hover {
  border-color: var(--color-accent);
}

.feature-icon {
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  display: block;
}

.feature-card h3 {
  margin-bottom: 1rem;
}

.feature-card p {
  font-size: 0.95rem;
  line-height: 1.7;
}

/* --- Stats / Trust --- */
.stats-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  margin-top: 2rem;
}

.stat-item {
  text-align: center;
  padding: 1.5rem 1rem;
}

.stat-number {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  color: var(--color-accent);
  display: block;
  margin-bottom: 0.5rem;
}

.section-accent .stat-number {
  color: var(--color-white);
}

.stat-label {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

.section-accent .stat-label {
  color: rgba(255, 255, 255, 0.7);
}

/* --- Process Steps --- */
.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-top: 2rem;
  counter-reset: step;
}

.step {
  position: relative;
  padding: 1.5rem 1.5rem 1.5rem 4.5rem;
}

.step::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 1.5rem;
  font-family: var(--font-serif);
  font-size: 2rem;
  color: var(--color-accent);
  opacity: 0.3;
}

.step h3 {
  margin-bottom: 0.75rem;
}

.step p {
  font-size: 0.95rem;
}

/* --- Testimonial / Quote --- */
.quote-section {
  padding: var(--section-padding);
  text-align: center;
}

.quote {
  font-family: var(--font-serif);
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-style: italic;
  line-height: 1.6;
  max-width: 750px;
  margin: 0 auto 1.5rem;
  color: var(--color-text);
}

.quote-author {
  font-size: 0.9rem;
  color: var(--color-text-light);
}

/* --- CTA Section --- */
.cta-section {
  padding: 3.5rem 1.5rem;
  text-align: center;
}

.cta-section h2 {
  margin-bottom: 1rem;
}

.cta-section p {
  margin: 0 auto 2rem;
}

/* --- About Teaser --- */
.about-teaser {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
}

.about-teaser-text .label {
  margin-bottom: 1rem;
}

.about-teaser-text h2 {
  margin-bottom: 1.5rem;
}

.about-teaser-text p {
  margin-bottom: 1.5rem;
}

.about-image-placeholder {
  aspect-ratio: 4/5;
  background: linear-gradient(135deg, var(--color-accent-light) 0%, var(--color-bg-alt) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  color: var(--color-text-light);
  border: 1px solid var(--color-border);
}

.about-image {
  width: 100%;
  max-width: 380px;
  aspect-ratio: 3/4;
  object-fit: cover;
  object-position: top;
  border-radius: 0;
}

/* --- Partners --- */
.partners {
  display: flex;
  flex-wrap: wrap;
  gap: 3rem;
  justify-content: center;
  align-items: center;
  margin-top: 2rem;
}

.partner-item {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: var(--color-text-light);
  opacity: 0.6;
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 3rem 1.5rem 1.5rem;
  background-color: var(--color-bg);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
}

.footer-brand .logo {
  margin-bottom: 1rem;
  display: inline-block;
}

.footer-brand p {
  font-size: 0.9rem;
  max-width: 350px;
}

.footer-nav h4 {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color-text);
  margin-bottom: 1rem;
}

.footer-nav a {
  display: block;
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-bottom: 0.5rem;
}

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

.footer-bottom {
  max-width: var(--max-width);
  margin: 2rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: var(--color-text-light);
}

/* --- Page Header (Subpages) --- */
.page-header {
  padding: 8rem 1.5rem 3rem;
  text-align: center;
}

.page-header h1 {
  margin-bottom: 1rem;
}

.page-header p {
  margin: 0 auto;
  max-width: 600px;
}

/* --- Content Blocks --- */
.content-block {
  max-width: 750px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.content-block h2 {
  margin-top: 2.5rem;
  margin-bottom: 1rem;
}

.content-block h3 {
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

.content-block p {
  margin-bottom: 1.25rem;
  max-width: 100%;
}

.content-block ul, .content-block ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

.content-block li {
  font-size: 1.05rem;
  color: var(--color-text-light);
  margin-bottom: 0.5rem;
  line-height: 1.7;
}

/* --- Credentials List --- */
.credentials {
  list-style: none;
  padding: 0;
  margin: 2rem 0;
}

.credentials li {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

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

.credential-icon {
  flex-shrink: 0;
  width: 3.2rem;
  height: 3.2rem;
  background: var(--color-accent-light);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

.credential-img {
  flex-shrink: 0;
  width: 3.2rem;
  max-width: 3.2rem;
  height: 3.2rem;
  max-height: 3.2rem;
  object-fit: contain;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: var(--color-white);
  padding: 0.15rem;
}

.credential-img-placeholder {
  flex-shrink: 0;
  width: 5rem;
  height: 5rem;
  background: var(--color-accent-light);
  border-radius: 4px;
  border: 1px dashed var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.6rem;
  color: var(--color-accent);
  text-align: center;
  padding: 0.25rem;
}

.credential-text h4 {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.credential-text p {
  font-size: 0.9rem;
  margin-bottom: 0;
}

/* --- Contact Form --- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  margin-top: 2rem;
}

.contact-info-item {
  margin-bottom: 1.5rem;
}

.contact-info-item h4 {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  color: var(--color-text);
}

.contact-info-item p {
  font-size: 1rem;
}

.contact-info-item a {
  color: var(--color-accent);
}

.contact-info-item a:hover {
  color: var(--color-accent-hover);
}

/* --- Legal Pages --- */
.legal-content {
  max-width: 750px;
  margin: 0 auto;
  padding: 0 1.5rem 3rem;
}

.legal-content h2 {
  font-size: 1.4rem;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
}

.legal-content h3 {
  font-size: 1.15rem;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

.legal-content p {
  margin-bottom: 1rem;
  max-width: 100%;
}

.legal-content ul {
  margin: 0.75rem 0 1.25rem 1.5rem;
  padding: 0;
  list-style: disc;
}

.legal-content ul li {
  font-family: var(--font-sans);
  font-size: 1.05rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 0.35rem;
}

/* --- Förder-Badge --- */
.foerder-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-accent-light);
  color: var(--color-accent);
  padding: 0.5rem 1.2rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 2rem;
}

/* --- Calendly Embed --- */
.calendly-container {
  max-width: 900px;
  margin: 0 auto;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  overflow: hidden;
  background: var(--color-bg);
}

.calendly-container .calendly-inline-widget {
  min-height: 700px;
}

@media (max-width: 639px) {
  .calendly-container .calendly-inline-widget {
    min-height: 820px;
  }
}

/* --- Calendar Embed --- */
.calendar-wrapper {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  overflow: hidden;
  max-width: 900px;
  margin: 0 auto;
  -webkit-overflow-scrolling: touch;
}

.calendar-wrapper iframe {
  display: block;
  border: 0;
  width: 100%;
  min-height: 1100px;
}

/* ========================================
   Responsive Breakpoints
   ======================================== */

/* Tablet */
@media (min-width: 640px) {
  .hero-buttons {
    flex-direction: row;
    justify-content: center;
  }

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

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

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

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

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

  .calendar-wrapper iframe {
    min-height: 1000px;
  }
}

/* Desktop */
@media (min-width: 1024px) {
  :root {
    --section-padding: 5rem 2rem;
  }

  .nav-desktop {
    display: flex;
  }

  .menu-toggle {
    display: none;
  }

  .features-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .steps {
    grid-template-columns: repeat(3, 1fr);
  }

  .about-teaser {
    grid-template-columns: 1fr 1fr;
  }

  .footer-inner {
    grid-template-columns: 2fr 1fr 1fr;
  }

  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }

  .hero {
    padding: 0 2rem;
  }

  .calendar-wrapper iframe {
    min-height: 900px;
  }
}