:root {
  --bg-base: #080b12;
  --bg-elevated: #0c1018;
  --bg-surface: #0a0d14;
  --bg-card: rgba(15, 23, 42, 0.6);
  --bg-card-hover: rgba(22, 33, 62, 0.7);
  --accent-blue: #3b82f6;
  --accent-blue-light: #60a5fa;
  --accent-blue-bright: #60a5fa;
  --accent-purple: #8b5cf6;
  --accent-cyan: #22d3ee;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --border-subtle: rgba(148, 163, 184, 0.08);
  --border-light: rgba(148, 163, 184, 0.15);
  --border-accent: rgba(59, 130, 246, 0.3);
  --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --gradient-accent: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.5), rgba(139, 92, 246, 0.3), transparent);
  --transition-smooth: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background: 
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(59, 130, 246, 0.12), transparent),
    radial-gradient(ellipse 60% 40% at 80% 100%, rgba(139, 92, 246, 0.06), transparent),
    radial-gradient(ellipse 50% 50% at 20% 80%, rgba(59, 130, 246, 0.04), transparent),
    linear-gradient(180deg, var(--bg-base) 0%, var(--bg-elevated) 50%, var(--bg-surface) 100%);
  background-attachment: fixed;
  color: var(--text-primary);
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  position: relative;
  z-index: 10;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1rem 0;
  background: rgba(8, 11, 18, 0.55);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border-subtle);
  transition: all 0.3s var(--transition-smooth);
}

.nav.scrolled {
  padding: 0.75rem 0;
  background: rgba(8, 11, 18, 0.9);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.nav-logo img {
  height: 20px;
  width: auto;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  align-items: center;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 400;
  transition: color 0.25s ease;
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-blue);
  transition: width 0.3s ease;
}

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

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

.nav-cta {
  background: linear-gradient(135deg, #15a4be, #1c5ea2);
  color: #fff;
  padding: 8px 1.75rem;
  border-radius: 8px;
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  transition: all 0.3s ease;
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.25);
  position: relative;
  overflow: hidden;
}

.nav-cta::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
  transition: left 0.5s ease;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.35);
}

.nav-cta:hover::before {
  left: 100%;
}

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.5rem;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8rem 2rem 6rem;
  position: relative;
  text-align: center;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -20%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.12) 0%, transparent 70%);
  pointer-events: none;
  filter: blur(60px);
  animation: glowPulse 8s ease-in-out infinite;
}

@keyframes glowPulse {
  0%, 100% {
    opacity: 0.6;
    transform: translateX(-50%) scale(1);
  }
  50% {
    opacity: 0.8;
    transform: translateX(-50%) scale(1.1);
  }
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 200px;
  background: linear-gradient(to top, var(--bg-elevated), transparent);
  pointer-events: none;
}

.hero-content {
  max-width: 860px;
  position: relative;
  z-index: 2;
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 400;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  letter-spacing: -0.03em;
}

.hero-title .highlight {
  background: linear-gradient(135deg, var(--accent-blue-bright), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 2.5rem;
  line-height: 1.75rem;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-block;
  background: linear-gradient(135deg, #15a4be, #1c5ea2);
  color: #fff;
  padding: 8px 1.75rem;
  border-radius: 8px;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all 0.3s ease;
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
  transition: left 0.5s ease;
}

.btn-primary:hover {
  box-shadow: 0 8px 24px rgba(59, 130, 246, 0.4);
  transform: translateY(-2px);
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-secondary {
  background: rgba(15, 23, 42, 0.5);
  color: var(--text-primary);
  padding: 8px 1.75rem;
  border-radius: 8px;
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all 0.3s ease;
  border: 1px solid var(--border-light);
}

.btn-secondary:hover {
  background: rgba(22, 33, 62, 0.7);
  border-color: rgba(148, 163, 184, 0.25);
  transform: translateY(-2px);
}

/* Logo Marquee */
.logo-section {
  padding: 0 0 4rem;
  margin-top: -8rem;
  background: transparent;
  position: relative;
  overflow: hidden;
  z-index: 10;
}

.logo-section-title {
  text-align: center;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  letter-spacing: 0.02em;
  margin-bottom: 1.5rem;
}

.logo-marquee {
  display: flex;
  overflow: hidden;
  mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
  -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
  max-width: 1000px;
  margin: 0 auto;
}

.logo-track {
  display: flex;
  align-items: center;
  gap: 3.5rem;
  animation: marquee 25s linear infinite;
  padding-right: 3.5rem;
}

.logo-track img {
  height: 28px;
  width: auto;
  opacity: 0.4;
  filter: grayscale(100%) brightness(1.8);
  transition: all 0.3s ease;
}

.logo-track img:hover {
  opacity: 0.7;
  filter: grayscale(50%) brightness(1.5);
}

@keyframes marquee {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* Services Section */
.services {
  padding: 7rem 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 4rem;
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 700;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.section-title .highlight {
  background: linear-gradient(135deg, var(--accent-blue-bright), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

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

.service-card {
  background: var(--bg-card);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 1.5rem 1.5rem 2rem;
  text-align: center;
  position: relative;
  box-shadow: 
    0 0 0 1px rgba(255, 255, 255, 0.03) inset,
    0 24px 48px -12px rgba(0, 0, 0, 0.4);
  transition: all 0.35s var(--transition-smooth);
}

.service-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40%;
  height: 1px;
  background: var(--gradient-accent);
  opacity: 0;
  transition: opacity 0.35s ease, width 0.35s ease;
}

.service-card:hover {
  border-color: var(--border-light);
  background: var(--bg-card-hover);
  transform: translateY(-4px);
  box-shadow: 
    0 0 0 1px rgba(255, 255, 255, 0.05) inset,
    0 32px 64px -16px rgba(0, 0, 0, 0.5),
    0 0 80px -20px rgba(59, 130, 246, 0.15);
}

.service-card:hover::before {
  opacity: 1;
  width: 60%;
}

.service-image {
  width: 100%;
  max-width: 260px;
  height: auto;
  object-fit: contain;
  margin: 0 auto 1rem;
  border-radius: 8px;
  border: 1px solid #159bba57;
}

.service-title {
  font-size: 1.35rem;
  font-weight: 600;
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

.service-description {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* KernStack Section */
.kernstack-section {
  padding: 5rem 0;
  position: relative;
}

.kernstack-card {
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.08) 0%, rgba(139, 92, 246, 0.05) 100%);
  border: 1px solid rgba(59, 130, 246, 0.15);
  border-radius: 20px;
  padding: 3.5rem;
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(20px);
  text-align: center;
}

.kernstack-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 50%;
  height: 1px;
  background: var(--gradient-accent);
}

.kernstack-content {
  max-width: 600px;
  margin: 0 auto;
}

.kernstack-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-blue-light);
  background: rgba(59, 130, 246, 0.1);
  padding: 0.4rem 0.9rem;
  border-radius: 20px;
  margin-bottom: 1.25rem;
}

.kernstack-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.kernstack-description {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.7;
  margin-bottom: 1.75rem;
}

/* Footer */
.footer {
  padding: 3rem 0 2rem;
  background: var(--bg-base);
  border-top: 1px solid var(--border-subtle);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.footer-left {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.footer-copyright {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s ease;
}

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

.footer-socials {
  display: flex;
  gap: 1rem;
}

.social-link {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 10px;
  color: var(--text-muted);
  text-decoration: none;
  transition: all 0.3s ease;
}

.social-link:hover {
  background: var(--accent-blue);
  color: #fff;
  transform: translateY(-2px);
}

.social-link svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* Responsive */
@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

  .mobile-menu-btn {
    display: block;
  }

  .services-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin: 0 auto;
  }
}

@media (max-width: 600px) {
  .hero {
    padding: 7rem 1.5rem 5rem;
  }

  .hero-title {
    font-size: 2.2rem;
  }

  .hero-description {
    font-size: 1.05rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
    max-width: 280px;
    text-align: center;
  }

  .container {
    padding: 0 1.25rem;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  .footer-left {
    flex-direction: column;
    gap: 1rem;
  }
}

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

.fade-in-up {
  animation: fadeInUp 0.7s var(--transition-smooth) forwards;
  opacity: 0;
}

.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }

/* Imprint */
.imprint-section {
  padding: 8rem 0 4rem;
  min-height: calc(100vh - 200px);
}

.imprint-section h1 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

.imprint-section h2 {
  font-size: 1.25rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.imprint-section p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1rem;
}

.imprint-section a {
  color: var(--accent);
  text-decoration: none;
}

.imprint-section a:hover {
  text-decoration: underline;
}