/* =============================================
   Ai-S Landing Page – Dark Theme
   Background: #110B22 | Accent: #7C5FE0 | Cards: #1D1435
   ============================================= */

:root {
  --bg: #110B22;
  --bg-card: #1D1435;
  --bg-card-hover: #251C42;
  --accent: #7C5FE0;
  --accent-light: #A390F0;
  --accent-glow: rgba(124, 95, 224, 0.35);
  --text: #E8E4F0;
  --text-muted: #9B93B0;
  --text-dim: #6B6380;
  --border: rgba(124, 95, 224, 0.2);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --font-serif: 'Playfair Display', Georgia, serif;
  --font-sans: 'Inter', system-ui, sans-serif;
  --transition: 0.25s ease;
  --container: 1140px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* Typography */
.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text);
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 640px;
  margin-top: 0.75rem;
}

.section-subtitle--todo {
  font-style: italic;
  color: var(--text-dim);
}

.section-text {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin: 1.25rem 0 2rem;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-header .section-subtitle {
  margin-left: auto;
  margin-right: auto;
}

.section-cta {
  text-align: center;
  margin-top: 2.5rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  border-radius: 50px;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}

.btn--primary {
  background: linear-gradient(135deg, var(--accent) 0%, #6344C8 100%);
  color: #fff;
  box-shadow: 0 4px 24px var(--accent-glow);
}

.btn--primary:hover {
  background: linear-gradient(135deg, var(--accent-light) 0%, var(--accent) 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px var(--accent-glow);
}

.btn--small {
  padding: 0.6rem 1.25rem;
  font-size: 0.85rem;
}

.btn--large {
  padding: 1rem 2.25rem;
  font-size: 1.05rem;
}

/* Header / Nav */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(17, 11, 34, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  padding: 0.5rem 0;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 92px;
  padding: 1.125rem 0;
}

.nav__logo {
  display: flex;
  align-items: center;
  background: none;
  border: none;
  box-shadow: none;
  padding: 0;
  line-height: 0;
}

.nav__logo img {
  height: 52px;
  width: auto;
  object-fit: contain;
  background: transparent;
  border: none;
  box-shadow: none;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav__links a:not(.btn) {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

.nav__links a:not(.btn):hover {
  color: var(--accent-light);
}

.nav__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

/* Hero */
.hero {
  padding: 8rem 0 5rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  left: -10%;
  width: 60%;
  height: 80%;
  background: radial-gradient(ellipse, rgba(124, 95, 224, 0.12) 0%, transparent 70%);
  pointer-events: none;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.hero__eyebrow {
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 1rem;
}

.hero__headline {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 1.75rem;
}

.hero__bullets {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-bottom: 2.25rem;
}

.hero__bullets li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.975rem;
  color: var(--text-muted);
}

.icon-check {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--accent-light);
  margin-top: 2px;
}

.hero__image-wrap {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero__image-glow {
  position: absolute;
  inset: 10%;
  background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
  border-radius: 50%;
  filter: blur(40px);
}

.hero__image {
  position: relative;
  border-radius: var(--radius-lg);
  object-fit: cover;
  max-height: 580px;
  width: 100%;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.4);
}

/* Trust Bar */
.trust {
  padding: 2rem 0 4rem;
}

.trust__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.trust__card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem 1.5rem;
  text-align: center;
  transition: var(--transition);
}

.trust__card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(124, 95, 224, 0.35);
  transform: translateY(-3px);
}

.trust__icon {
  width: 44px;
  height: 44px;
  margin: 0 auto 1rem;
  color: var(--accent-light);
}

.trust__icon svg {
  width: 100%;
  height: 100%;
}

.trust__title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.trust__text {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Methoden */
.methoden {
  padding: 5rem 0;
}

.methoden__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.methoden__visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.methoden__photo {
  width: 100%;
  border-radius: var(--radius-lg);
  object-fit: cover;
  aspect-ratio: 4 / 5;
  object-position: top center;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.35);
}

/* Module Overview */
.module-overview {
  padding: 5rem 0;
  background: linear-gradient(180deg, transparent 0%, rgba(29, 20, 53, 0.4) 50%, transparent 100%);
}

.module-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.module-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.75rem;
  transition: var(--transition);
}

.module-card:hover {
  background: var(--bg-card-hover);
  border-color: rgba(124, 95, 224, 0.4);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.25);
}

.module-card__icon {
  width: 48px;
  height: 48px;
  background: rgba(124, 95, 224, 0.15);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-light);
  margin-bottom: 1.25rem;
}

.module-card__icon svg {
  width: 24px;
  height: 24px;
}

.module-card__title {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
}

.module-card__text {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
}

/* Audience */
.audience {
  padding: 5rem 0;
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.audience-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  transition: var(--transition);
}

.audience-card:hover {
  border-color: rgba(124, 95, 224, 0.4);
  transform: translateY(-3px);
}

.audience-card__number {
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  opacity: 0.6;
  margin-bottom: 0.75rem;
}

.audience-card__title {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.audience-card__text {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Fahrplan Tabs */
.fahrplan {
  padding: 5rem 0;
  background: linear-gradient(180deg, transparent 0%, rgba(29, 20, 53, 0.3) 50%, transparent 100%);
}

.fahrplan__tabs {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.fahrplan__tab {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: var(--bg-card);
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.fahrplan__tab:hover {
  border-color: var(--accent);
  color: var(--accent-light);
}

.fahrplan__tab--active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.fahrplan__panels {
  position: relative;
}

.fahrplan__panel {
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  animation: fadeIn 0.4s ease;
}

.fahrplan__panel--active {
  display: grid;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.fahrplan__step {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-light);
  margin-bottom: 0.75rem;
}

.fahrplan__title {
  font-family: var(--font-serif);
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.fahrplan__text {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.75;
}

.fahrplan__panel-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 240px;
  margin: 0 auto;
}

.fahrplan__panel-icon img {
  width: 100%;
  height: auto;
  display: block;
}

/* Testimonials */
.testimonials {
  padding: 5rem 0;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  text-align: center;
}

.testimonial-card--placeholder {
  border-style: dashed;
  border-color: rgba(124, 95, 224, 0.25);
  opacity: 0.7;
}

.testimonial-card__avatar {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: rgba(124, 95, 224, 0.15);
  color: var(--accent-light);
  font-size: 1.5rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
}

.testimonial-card__name {
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.testimonial-card__label {
  font-size: 0.8rem;
  color: var(--accent-light);
  margin-bottom: 1rem;
}

.testimonial-card__quote {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-style: italic;
  line-height: 1.6;
}

/* Trainer Bio */
.trainer {
  padding: 5rem 0;
  background: linear-gradient(180deg, transparent 0%, rgba(29, 20, 53, 0.4) 50%, transparent 100%);
}

.trainer__grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 4rem;
  align-items: center;
}

.trainer__image-wrap {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.35);
}

.trainer__image {
  width: 100%;
  object-fit: cover;
  aspect-ratio: 3/4;
  object-position: top center;
}

.trainer__bio {
  font-size: 1.05rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin: 1.25rem 0 1.75rem;
}

.trainer__quote {
  border-left: 3px solid var(--accent);
  padding: 1rem 0 1rem 1.5rem;
  margin-bottom: 2rem;
}

.trainer__quote p {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-style: italic;
  color: var(--text);
  line-height: 1.6;
}

/* FAQ */
.faq {
  padding: 5rem 0;
}

.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item[open] {
  border-color: rgba(124, 95, 224, 0.35);
}

.faq-item__question {
  padding: 1.25rem 1.5rem;
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  transition: color var(--transition);
}

.faq-item__question::-webkit-details-marker {
  display: none;
}

.faq-item__question::after {
  content: '+';
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--accent-light);
  flex-shrink: 0;
  transition: transform var(--transition);
}

.faq-item[open] .faq-item__question::after {
  transform: rotate(45deg);
}

.faq-item__question:hover {
  color: var(--accent-light);
}

.faq-item__answer {
  padding: 0 1.5rem 1.25rem;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Final CTA */
.final-cta {
  padding: 5rem 0;
}

.final-cta__inner {
  position: relative;
  text-align: center;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 4rem 2rem;
  overflow: hidden;
}

.final-cta__glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80%;
  height: 80%;
  background: radial-gradient(ellipse, var(--accent-glow) 0%, transparent 70%);
  pointer-events: none;
}

.final-cta__title {
  position: relative;
  font-family: var(--font-serif);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.final-cta__subtitle {
  position: relative;
  font-size: 1.05rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
}

.final-cta__inner .btn {
  position: relative;
}

.final-cta__benefits {
  position: relative;
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

.final-cta__benefits li {
  font-size: 0.875rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.final-cta__benefits li::before {
  content: '✓';
  color: var(--accent-light);
  font-weight: 600;
}

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

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 2rem;
  padding-bottom: 2rem;
}

.footer__logo {
  height: 40px;
  width: auto;
  margin-bottom: 0.75rem;
  background: transparent;
  border: none;
  box-shadow: none;
}

.footer__tagline {
  font-size: 0.85rem;
  color: var(--text-dim);
}

.footer__social-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  margin-bottom: 0.75rem;
}

.footer__social-links {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer__social-links a {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

.footer__social-links a:hover {
  color: var(--accent-light);
}

.footer__legal {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: flex-end;
}

.footer__legal a {
  font-size: 0.9rem;
  color: var(--text-muted);
  transition: color var(--transition);
}

.footer__legal a:hover {
  color: var(--accent-light);
}

.footer__bottom {
  border-top: 1px solid var(--border);
  padding: 1.25rem 0;
}

.footer__bottom p {
  font-size: 0.8rem;
  color: var(--text-dim);
  text-align: center;
}

/* Responsive */
@media (max-width: 1024px) {
  .trust__grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

  .hero__grid,
  .methoden__inner,
  .trainer__grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .hero__image-wrap {
    order: -1;
    max-width: 420px;
    margin: 0 auto;
  }

  .methoden__visual {
    order: -1;
  }

  .methoden__visual {
    order: -1;
  }

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

  .fahrplan__panel-icon {
    order: -1;
    max-width: 200px;
  }

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

  .footer__legal {
    align-items: flex-start;
  }
}

@media (max-width: 768px) {
  .nav__toggle {
    display: flex;
  }

  .nav__links {
    position: fixed;
    top: 108px;
    left: 0;
    right: 0;
    background: rgba(17, 11, 34, 0.97);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 1.5rem;
    gap: 1.25rem;
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
  }

  .nav__links--open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .hero {
    padding-top: 6.5rem;
  }

  .trust__grid,
  .module-grid,
  .audience-grid,
  .testimonials-grid {
    grid-template-columns: 1fr;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer__legal {
    align-items: center;
  }

  .footer__social-links {
    align-items: center;
  }

  .final-cta__benefits {
    flex-direction: column;
    gap: 0.5rem;
  }
}