/* ============================================
   AgentenFlow.de - Main Stylesheet
   Basierend auf Agentenbibliothek CI + Flow-Dynamik
   ============================================ */

/* CSS Variables / Design Tokens */
:root {
  /* Primärfarben mit Gradient */
  --primary: #00A0C6;
  --primary-light: #33B5D6;
  --primary-dark: #008BAB;
  --gradient-primary: linear-gradient(135deg, #00A0C6 0%, #33B5D6 100%);
  
  /* Sekundärfarben */
  --secondary: #2c3e50;
  --secondary-light: #34495e;
  
  /* Akzentfarben */
  --accent-success: #27ae60;
  --accent-warning: #e74c3c;
  --accent-info: #3498db;
  
  /* Neutrale Farben */
  --neutral-light: #ecf0f1;
  --neutral: #95a5a6;
  --neutral-dark: #7f8c8d;
  
  /* Basis */
  --white: #FFFFFF;
  --black: #1a1a1a;
  --text: #2c3e50;
  --text-light: #5a6c7d;
  
  /* Schatten */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 12px 32px rgba(0, 0, 0, 0.15);
  
  /* Abstände */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2.5rem;
  --spacing-xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* Container */
  --container-width: 1200px;
  --content-width: 800px;
}

/* ============================================
   Reset & Base Styles
   ============================================ */

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

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  color: var(--secondary);
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
}

h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--primary);
}

h4 {
  font-size: 1.25rem;
}

p {
  margin-bottom: var(--spacing-sm);
  color: var(--text);
}

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

a:hover {
  color: var(--primary-dark);
}

strong {
  font-weight: 600;
  color: var(--secondary);
}

/* ============================================
   Layout Components
   ============================================ */

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

.content-wrapper {
  max-width: var(--content-width);
  margin: 0 auto;
}

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

.section-alt {
  background: var(--neutral-light);
}

/* ============================================
   Header & Navigation
   ============================================ */

.header {
  position: sticky;
  top: 0;
  background: var(--white);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  transition: all var(--transition-base);
}

.header.scrolled {
  box-shadow: var(--shadow-md);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-md) 0;
}

.logo {
  display: flex;
  align-items: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--secondary);
  transition: transform var(--transition-base);
}

.logo:hover {
  transform: translateY(-2px);
}

.logo-icon {
  width: 40px;
  height: 40px;
  margin-right: var(--spacing-sm);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav-link {
  font-weight: 500;
  color: var(--text);
  padding: var(--spacing-xs) 0;
  position: relative;
  transition: color var(--transition-base);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: width var(--transition-base);
}

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

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.menu-toggle span {
  display: block;
  width: 25px;
  height: 3px;
  background: var(--secondary);
  margin: 5px 0;
  transition: all var(--transition-base);
}

/* ============================================
   Hero Section
   ============================================ */

.hero {
  position: relative;
  padding: calc(var(--spacing-xl) * 2) 0 var(--spacing-xl);
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: var(--white);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

/* Flow Animation im Hero */
.hero::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  animation: flowLine 3s infinite;
}

@keyframes flowLine {
  0% {
    transform: translateX(-100%);
  }
  100% {
    transform: translateX(100%);
  }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero h1 {
  color: var(--white);
  margin-bottom: var(--spacing-md);
  animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-lg);
  opacity: 0.95;
  animation: fadeInUp 0.8s ease 0.2s backwards;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
  animation: fadeInUp 0.8s ease 0.4s backwards;
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 0.875rem 1.75rem;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
}

.btn-primary {
  background: var(--white);
  color: var(--primary);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: var(--primary-dark);
}

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

.btn-secondary:hover {
  background: var(--white);
  color: var(--primary);
}

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

.btn-accent:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-large {
  padding: 1.125rem 2rem;
  font-size: 1.125rem;
}

/* ============================================
   Agent Cards (speziell für AgentenFlow)
   ============================================ */

.agent-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.agent-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  border: 2px solid transparent;
  position: relative;
  overflow: hidden;
}

.agent-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.agent-card:hover::before {
  transform: scaleX(1);
}

.agent-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-light);
}

.agent-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--spacing-md);
}

.agent-icon {
  width: 56px;
  height: 56px;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1.75rem;
  flex-shrink: 0;
}

.agent-status {
  padding: 0.25rem 0.75rem;
  background: var(--accent-success);
  color: var(--white);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.agent-status.beta {
  background: var(--primary);
}

.agent-status.planned {
  background: var(--neutral);
}

.agent-card h3 {
  font-size: 1.375rem;
  margin-bottom: var(--spacing-sm);
  color: var(--secondary);
}

.agent-description {
  color: var(--text-light);
  margin-bottom: var(--spacing-md);
  font-size: 0.95rem;
  line-height: 1.6;
}

.agent-features {
  list-style: none;
  margin-bottom: var(--spacing-md);
}

.agent-features li {
  padding: 0.5rem 0;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 0.9rem;
  color: var(--text);
}

.agent-features li::before {
  content: '✓';
  color: var(--accent-success);
  font-weight: 700;
}

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

/* ============================================
   Feature Showcase
   ============================================ */

.feature-showcase {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.feature-box {
  background: var(--white);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--primary);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.feature-box:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
}

.feature-box h4 {
  color: var(--primary);
  margin-bottom: var(--spacing-sm);
}

/* ============================================
   Beta Form Section
   ============================================ */

.beta-form-section {
  background: var(--gradient-primary);
  color: var(--white);
  padding: calc(var(--spacing-xl) * 1.5) 0;
}

.beta-form-container {
  max-width: 600px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
  color: var(--white);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.875rem;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.95);
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
  transition: all var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--white);
  background: var(--white);
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.2);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-checkbox {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.form-checkbox input[type="checkbox"] {
  width: auto;
}

/* ============================================
   Roadmap Timeline
   ============================================ */

.roadmap {
  position: relative;
  padding: var(--spacing-lg) 0;
}

.roadmap::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--neutral-light);
  transform: translateX(-50%);
}

.roadmap-item {
  display: grid;
  grid-template-columns: 1fr 80px 1fr;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
  align-items: center;
}

.roadmap-item:nth-child(even) .roadmap-content {
  grid-column: 3;
  grid-row: 1;
}

.roadmap-item:nth-child(even) .roadmap-marker {
  grid-column: 2;
  grid-row: 1;
}

.roadmap-item:nth-child(even) .roadmap-date {
  grid-column: 1;
  grid-row: 1;
  text-align: right;
}

.roadmap-marker {
  width: 80px;
  height: 80px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1.5rem;
  font-weight: 700;
  box-shadow: var(--shadow-lg);
  position: relative;
  z-index: 2;
}

.roadmap-content {
  background: var(--white);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.roadmap-date {
  font-weight: 600;
  color: var(--primary);
  font-size: 0.95rem;
}

/* ============================================
   Stats Section
   ============================================ */

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.stat-box {
  text-align: center;
  padding: var(--spacing-lg);
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.stat-number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  color: var(--text-light);
  font-size: 0.95rem;
}

/* ============================================
   CTA Section
   ============================================ */

.cta-section {
  background: var(--primary);
  color: var(--white);
  text-align: center;
  padding: calc(var(--spacing-xl) * 1.5) 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 30% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 70% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.cta-content {
  position: relative;
  z-index: 1;
}

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

.cta-section p {
  color: rgba(255, 255, 255, 0.95);
  font-size: 1.125rem;
  margin-bottom: var(--spacing-lg);
}

/* ============================================
   Footer
   ============================================ */

.footer {
  background: var(--secondary);
  color: var(--white);
  padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-section h4 {
  color: var(--white);
  margin-bottom: var(--spacing-md);
  font-size: 1.125rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--spacing-xs);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition-base);
}

.footer-links a:hover {
  color: var(--white);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--spacing-md);
  text-align: center;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.875rem;
}

/* ============================================
   Animations
   ============================================ */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.fade-in {
  animation: fadeIn 0.6s ease;
}

.fade-in-up {
  animation: fadeInUp 0.8s ease;
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 72px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 72px);
    background: var(--white);
    flex-direction: column;
    align-items: flex-start;
    padding: var(--spacing-lg);
    gap: var(--spacing-md);
    box-shadow: var(--shadow-lg);
    transition: left var(--transition-base);
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .menu-toggle {
    display: block;
  }
  
  .menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .menu-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
  }
  
  .hero {
    padding: var(--spacing-xl) 0;
  }
  
  .hero-cta {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
    justify-content: center;
  }
  
  .agent-grid {
    grid-template-columns: 1fr;
  }
  
  .roadmap::before {
    left: 20px;
  }
  
  .roadmap-item {
    grid-template-columns: 60px 1fr;
    gap: var(--spacing-md);
  }
  
  .roadmap-item:nth-child(even) .roadmap-content,
  .roadmap-item:nth-child(even) .roadmap-date {
    grid-column: 2;
  }
  
  .roadmap-item:nth-child(even) .roadmap-marker {
    grid-column: 1;
  }
  
  .roadmap-item:nth-child(even) .roadmap-date {
    text-align: left;
  }
  
  .roadmap-marker {
    width: 60px;
    height: 60px;
    font-size: 1.25rem;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   Utility Classes
   ============================================ */

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

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

.text-secondary {
  color: var(--secondary);
}

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }