/* ============================================================
   David Kostolany – High Class KI-Website-Modernisierung
   Premium Design System
   ============================================================ */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600&family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400&display=swap');

/* ---------- Design Tokens ---------- */
:root {
  /* High-Class Dark Theme */
  --bg-deep: #030508;
  --bg-primary: #070b12;
  --bg-card: rgba(255, 255, 255, 0.02);
  --bg-card-hover: rgba(255, 255, 255, 0.04);
  
  /* Text */
  --text-primary: #f8fafc;
  --text-secondary: #a1a1aa;
  --text-muted: #52525b;
  
  /* Gold / Premium Accents */
  --gold-main: #d4af37;
  --gold-light: #f3e5ab;
  --gold-dark: #8a7322;
  --gold-glow: rgba(212, 175, 55, 0.15);
  
  /* Highlights & Borders */
  --accent: var(--gold-main);
  --glass-border: rgba(212, 175, 55, 0.2);
  --glass-border-light: rgba(255, 255, 255, 0.05);
  --danger: #cf6679;
  
  /* Gradients */
  --gradient-gold: linear-gradient(135deg, #f3e5ab 0%, #d4af37 50%, #8a7322 100%);
  --gradient-text: linear-gradient(to right, #ffffff, #a1a1aa);
  --gradient-bg: radial-gradient(circle at top right, #111827 0%, #030508 100%);
  --gradient-glow: radial-gradient(circle at 50% 0%, rgba(212,175,55,0.08) 0%, transparent 60%);

  /* Typography */
  --font-heading: 'Playfair Display', serif;
  --font-body: 'Inter', sans-serif;
  
  --fs-hero: clamp(2.5rem, 6vw, 4.5rem);
  --fs-h2: clamp(2rem, 4vw, 3rem);
  --fs-h3: clamp(1.2rem, 2vw, 1.5rem);
  --fs-body: clamp(1rem, 1.2vw, 1.15rem);
  --fs-small: 0.875rem;
  --fs-tag: 0.75rem;

  /* Spacing & Layout */
  --section-py: clamp(5rem, 10vw, 8rem);
  --container: 1280px;
  --gap: 2rem;
  --radius: 20px;
  --radius-sm: 8px;

  /* Effects */
  --shadow-premium: 0 20px 40px rgba(0,0,0,0.4);
  --shadow-gold: 0 8px 32px rgba(212,175,55,0.15);
  --backdrop-calc: blur(20px) saturate(180%);
  --transition: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-deep);
  background-image: var(--gradient-bg);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 400;
  line-height: 1.15;
}

/* ---------- Container & Utilities ---------- */
.container {
  width: 92%;
  max-width: var(--container);
  margin: 0 auto;
}

.section {
  padding: var(--section-py) 0;
  position: relative;
}
.section::before {
  content: '';
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  height: 100%;
  background: var(--gradient-glow);
  pointer-events: none;
  z-index: -1;
}

/* Animations */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  filter: blur(5px);
  transition: opacity 1s var(--transition), transform 1s var(--transition), filter 1s var(--transition);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
  filter: blur(0);
}

.highlight {
  background: var(--gradient-gold);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  color: transparent;
  font-style: italic;
  font-weight: 600;
}

.section-tag {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--fs-tag);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--gold-main);
  margin-bottom: 1rem;
}

.section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 4rem;
}

.section-title {
  margin-bottom: 1.5rem;
}

.section-subtitle {
  font-size: var(--fs-body);
  color: var(--text-secondary);
  font-weight: 300;
}

/* ---------- Header ---------- */
.header {
  position: fixed;
  top: 0;
  width: 100%;
  padding: 1.5rem 0;
  z-index: 100;
  transition: background var(--transition), backdrop-filter var(--transition), border-bottom var(--transition);
  border-bottom: 1px solid transparent;
}
.header.scrolled {
  background: rgba(3, 5, 8, 0.85);
  backdrop-filter: var(--backdrop-calc);
  border-bottom: 1px solid var(--glass-border-light);
  padding: 1rem 0;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-text {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--gold-main);
  letter-spacing: 0.02em;
}

.nav {
  display: none;
  gap: 2.5rem;
}

@media (min-width: 900px) {
  .nav { display: flex; }
}

.nav a {
  font-size: 0.9rem;
  color: var(--text-primary);
  opacity: 0.8;
  transition: opacity var(--transition), color var(--transition);
}
.nav a:hover {
  opacity: 1;
  color: var(--gold-main);
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2.5rem;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  color: var(--bg-deep);
  background: var(--gradient-gold);
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow-gold);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(212,175,55,0.3);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2.5rem;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  color: var(--text-primary);
  background: transparent;
  border: 1px solid var(--glass-border);
  border-radius: 4px;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
}
.btn-secondary:hover {
  background: rgba(212,175,55,0.05);
  border-color: var(--gold-main);
}

.btn-outline {
  display: inline-flex;
  padding: 0.6rem 1.5rem;
  font-size: 0.85rem;
  border: 1px solid var(--glass-border);
  border-radius: 4px;
  transition: all var(--transition);
}
.btn-outline:hover {
  background: var(--gold-main);
  color: var(--bg-deep);
  border-color: var(--gold-main);
}

/* ---------- 1. Hero Section ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 6rem;
  position: relative;
}

.hero-overlay {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  background: radial-gradient(circle at 70% 50%, rgba(212,175,55,0.05), transparent 60%);
  pointer-events: none;
}

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

@media (min-width: 1024px) {
  .hero-container {
    grid-template-columns: 1.1fr 0.9fr;
  }
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero .pre-headline {
  display: inline-block;
  font-size: var(--fs-tag);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--gold-main);
  margin-bottom: 1.5rem;
  position: relative;
  padding-left: 2rem;
}
.hero .pre-headline::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  width: 1.2rem; height: 1px;
  background: var(--gold-main);
}

.hero h1 {
  font-size: var(--fs-hero);
  margin-bottom: 1.5rem;
  letter-spacing: -0.01em;
}

.hero .sub-headline {
  font-size: var(--fs-body);
  color: var(--text-secondary);
  font-weight: 300;
  margin-bottom: 2.5rem;
  max-width: 580px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.hero-stats {
  display: flex;
  gap: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--glass-border-light);
}

.hero-stat strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 2rem;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 0.5rem;
}
.hero-stat span {
  font-size: var(--fs-small);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Hero Visual */
.hero-visual {
  position: relative;
  width: 100%;
  perspective: 1000px;
}

.hero-image-wrapper {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-premium);
  transform: rotateY(-5deg) rotateX(2deg);
  transition: transform 0.5s ease-out;
}
.hero-image-wrapper:hover {
  transform: rotateY(0deg) rotateX(0deg);
}

.hero-image-wrapper::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, transparent 50%);
  pointer-events: none;
}

.hero-img {
  width: 100%;
  height: auto;
  aspect-ratio: 4/3;
  object-fit: cover;
  filter: contrast(1.1) brightness(0.9);
}

.visual-glow {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 120%; height: 120%;
  background: radial-gradient(circle, rgba(212,175,55,0.15) 0%, transparent 70%);
  z-index: -1;
  filter: blur(40px);
}

/* ---------- 2. Problem Section ---------- */
.problem-comparison {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

@media (min-width: 900px) {
  .problem-comparison {
    flex-direction: row;
    align-items: stretch;
  }
}

.comparison-card {
  flex: 1;
  background: var(--bg-card);
  border: 1px solid var(--glass-border-light);
  border-radius: var(--radius);
  padding: 3rem;
  position: relative;
  overflow: hidden;
}
.comparison-card--old {
  opacity: 0.8;
}
.comparison-card--new {
  background: linear-gradient(180deg, rgba(212,175,55,0.03) 0%, rgba(255,255,255,0.01) 100%);
  border-color: var(--glass-border);
  box-shadow: var(--shadow-gold);
}

.comparison-label {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.status-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
}
.status-dot--red { background: var(--danger); box-shadow: 0 0 10px rgba(207, 102, 121, 0.5); }
.status-dot--gold { background: var(--gold-main); box-shadow: 0 0 10px var(--gold-main); }

.comparison-list {
  list-style: none;
}
.comparison-list li {
  margin-bottom: 1.25rem;
  color: var(--text-secondary);
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  font-weight: 300;
}
.comparison-card--new .comparison-list li {
  color: var(--text-primary);
}

.icon-x { color: var(--danger); font-weight: bold; }
.icon-check { color: var(--gold-main); font-weight: bold; }

.comparison-divider {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}
@media (max-width: 899px) {
  .comparison-divider {
    flex-direction: row;
    padding: 2rem 0;
  }
}

.divider-icon {
  width: 40px; height: 40px;
  background: var(--bg-deep);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold-main);
  font-size: 1.2rem;
}
.divider-line {
  width: 1px;
  height: 60px;
  background: var(--glass-border);
}
@media (max-width: 899px) {
  .divider-line {
    width: 60px; height: 1px;
  }
}

/* ---------- 3. Solution / Expertise ---------- */
.solution {
  background: var(--bg-primary);
}

.solution-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4rem;
  align-items: center;
}
@media (min-width: 900px) {
  .solution-grid {
    grid-template-columns: 0.8fr 1.2fr;
  }
}

.solution-image-wrapper {
  position: relative;
}
.portrait-img {
  width: 100%;
  border-radius: 4px;
  filter: grayscale(100%) contrast(1.1);
  transition: filter var(--transition);
  position: relative;
  z-index: 2;
}
.solution-image-wrapper:hover .portrait-img {
  filter: grayscale(0%) contrast(1.05);
}

.gold-frame {
  position: absolute;
  top: -15px; left: -15px;
  width: 100%; height: 100%;
  border: 1px solid var(--gold-main);
  border-radius: 4px;
  z-index: 1;
  transition: transform var(--transition);
}
.solution-image-wrapper:hover .gold-frame {
  transform: translate(-5px, -5px);
}

.solution-text h2 {
  margin-bottom: 2rem;
}

.solution-text p {
  color: var(--text-secondary);
  font-weight: 300;
  margin-bottom: 1.5rem;
}
.solution-text p strong {
  color: var(--text-primary);
  font-weight: 500;
}

.benefits-grid {
  margin-top: 3rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}
.benefit-item {
  display: flex;
  gap: 1.5rem;
}
.benefit-icon {
  color: var(--gold-main);
  font-size: 1.5rem;
  line-height: 1;
}
.benefit-item h4 {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 0.25rem;
}
.benefit-item p {
  font-size: var(--fs-small);
  margin-bottom: 0;
}

/* ---------- 4. Offer Section ---------- */
.offer-box {
  background: linear-gradient(145deg, var(--bg-primary), var(--bg-deep));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: clamp(3rem, 6vw, 5rem);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.offer-box::before {
  content: '';
  position: absolute;
  top: 0; left: 0; width: 100%; height: 2px;
  background: var(--gradient-gold);
}

.offer-content {
  max-width: 800px;
  margin: 0 auto;
}

.offer-description {
  color: var(--text-secondary);
  font-weight: 300;
  margin-bottom: 4rem;
}

.offer-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 4rem;
  text-align: left;
}
.offer-step {
  padding: 2rem;
  border-top: 1px solid var(--glass-border-light);
  position: relative;
}
.offer-step::before {
  content: '';
  position: absolute;
  top: -1px; left: 0;
  width: 0; height: 1px;
  background: var(--gold-main);
  transition: width 0.5s ease;
}
.offer-step:hover::before {
  width: 100%;
}

.step-num {
  font-family: var(--font-heading);
  font-size: 2rem;
  color: var(--gold-main);
  opacity: 0.5;
  margin-bottom: 1rem;
}

/* ---------- 5. Final CTA / Calendly ---------- */
.final-cta {
  background: var(--bg-deep);
}

.calendly-embed {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  min-height: 700px;
  background: var(--bg-card);
  border: 1px solid var(--glass-border-light);
  border-radius: var(--radius);
  overflow: hidden;
}
.calendly-embed iframe {
  width: 100%;
  height: 700px;
  border: none;
}

/* ---------- Footer ---------- */
.footer {
  padding: 4rem 0 2rem;
  background: #010203;
  border-top: 1px solid var(--glass-border-light);
}
.footer-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 2rem;
}
@media (min-width: 768px) {
  .footer-container {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer-brand p {
  color: var(--text-muted);
  font-size: var(--fs-small);
  margin-top: 0.5rem;
}

.footer-links {
  display: flex;
  gap: 2rem;
}
.footer-links a {
  color: var(--text-secondary);
  font-size: var(--fs-small);
  transition: color var(--transition);
}
.footer-links a:hover {
  color: var(--gold-main);
}

.footer-copy p {
  color: var(--text-muted);
  font-size: var(--fs-small);
}

/* Base Responsive Mobile Adjustments */
@media (max-width: 600px) {
  .hero-actions {
    flex-direction: column;
  }
  .btn-primary, .btn-secondary {
    width: 100%;
  }
  .hero-stats {
    flex-direction: column;
    gap: 1.5rem;
    align-items: flex-start;
  }
}