:root {
  --bg-primary: #0b0f19;
  --bg-secondary: #131b2e;
  --bg-card: rgba(26, 38, 64, 0.7);
  --border-color: rgba(255, 255, 255, 0.08);
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --accent: #38bdf8;
  --accent-hover: #0ea5e9;
  --accent-gold: #fbbf24;
  --radius-lg: 16px;
  --radius-md: 10px;
  --shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
  width: 100%;
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  width: 100%;
  position: relative;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

/* Header & Navigation */
header.site-header {
  border-bottom: 1px solid var(--border-color);
  background: rgba(11, 15, 25, 0.85);
  backdrop-filter: blur(16px);
  position: sticky;
  top: 0;
  z-index: 50;
  width: 100%;
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-main);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}

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

nav.main-nav {
  display: flex;
  gap: 24px;
  align-items: center;
}

nav.main-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

nav.main-nav a:hover,
nav.main-nav a.active {
  color: var(--text-main);
}

/* Mobile Hamburger Toggle */
.mobile-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  cursor: pointer;
  padding: 8px;
  width: 44px;
  height: 44px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  z-index: 100;
  transition: background 0.2s, border-color 0.2s;
}

.mobile-toggle:hover, .mobile-toggle:focus-visible {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--accent);
  outline: none;
}

.mobile-toggle .bar {
  width: 22px;
  height: 2px;
  background-color: var(--text-main);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.mobile-toggle.open .bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.mobile-toggle.open .bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.mobile-toggle.open .bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, #0284c7 100%);
  color: #0b0f19;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #7dd3fc 0%, var(--accent) 100%);
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.4);
  transform: translateY(-1px);
}

.btn-outline {
  border: 1px solid var(--border-color);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-main);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.2);
}

/* Hero Section */
.hero {
  padding: 80px 0 50px;
  text-align: center;
  position: relative;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 9999px;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
  overflow-wrap: break-word;
}

.hero h1 .highlight {
  background: linear-gradient(135deg, #38bdf8 0%, #fbbf24 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-muted);
  max-width: 700px;
  margin: 0 auto 36px;
}

.hero code {
  background: rgba(56, 189, 248, 0.15);
  color: var(--accent);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.95em;
  word-break: break-all;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* Features Grid */
section.features, section.steps, section.contact {
  scroll-margin-top: 85px;
}

.features {
  padding: 60px 0 80px;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header h2 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.section-header p {
  color: var(--text-muted);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr));
  gap: 24px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  backdrop-filter: blur(12px);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(56, 189, 248, 0.3);
}

.card-icon {
  font-size: 2rem;
  margin-bottom: 16px;
  display: inline-block;
}

.card h3 {
  font-size: 1.25rem;
  margin-bottom: 10px;
}

.card p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Steps Section */
.steps {
  padding: 60px 0 80px;
  background: rgba(19, 27, 46, 0.5);
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
}

.step-number {
  width: 44px;
  height: 44px;
  background: var(--accent);
  color: #0b0f19;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 1.2rem;
  margin-bottom: 18px;
}

/* Contact CTA */
.contact-cta {
  padding: 80px 0;
  text-align: center;
}

.cta-box {
  background: linear-gradient(135deg, rgba(26, 38, 64, 0.9) 0%, rgba(19, 27, 46, 0.9) 100%);
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: var(--radius-lg);
  padding: 48px 32px;
  max-width: 800px;
  margin: 0 auto;
}

.cta-box h2 {
  font-size: 2rem;
  margin-bottom: 16px;
}

.cta-box p {
  color: var(--text-muted);
  font-size: 1.1rem;
  margin-bottom: 28px;
}

/* Content Page (Impressum, Datenschutz) */
.content-section {
  padding: 60px 0;
  flex: 1;
}

.content-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  backdrop-filter: blur(12px);
}

.content-box h1 {
  font-size: 2.2rem;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 16px;
}

.content-box h2 {
  font-size: 1.4rem;
  margin: 32px 0 12px;
  color: var(--accent);
}

.content-box h3 {
  font-size: 1.15rem;
  margin: 20px 0 8px;
}

.content-box p, .content-box ul {
  color: var(--text-muted);
  margin-bottom: 16px;
}

.content-box ul {
  padding-left: 24px;
}

.placeholder-badge {
  background: rgba(251, 191, 36, 0.15);
  border: 1px dashed var(--accent-gold);
  color: var(--accent-gold);
  padding: 2px 8px;
  border-radius: 4px;
  font-family: monospace;
}

/* Footer */
footer.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border-color);
  padding: 36px 0;
  background: var(--bg-secondary);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

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

.footer-links {
  display: flex;
  gap: 20px;
}

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

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

/* ================= RESPONSIVE MOBILE STYLES ================= */
@media (max-width: 820px) {
  .mobile-toggle {
    display: flex;
  }

  nav.main-nav {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    height: calc(100vh - 72px);
    background: rgba(11, 15, 25, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 24px 20px 40px;
    gap: 14px;
    overflow-y: auto;
    z-index: 90;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.8);
    align-items: stretch;
  }

  nav.main-nav.open {
    display: flex;
    animation: fadeInNav 0.22s ease forwards;
  }

  nav.main-nav a {
    font-size: 1.1rem;
    padding: 12px 14px;
    border-radius: var(--radius-md);
    display: block;
    text-align: left;
    border: 1px solid transparent;
  }

  nav.main-nav a:hover,
  nav.main-nav a.active {
    background: rgba(56, 189, 248, 0.12);
    border-color: rgba(56, 189, 248, 0.3);
  }

  nav.main-nav .btn {
    margin-top: 8px;
    width: 100%;
    text-align: center;
    padding: 12px;
    font-size: 1rem;
  }

  .container {
    padding: 0 16px;
  }

  .hero {
    padding: 48px 0 32px;
  }

  .hero-badge {
    font-size: 0.78rem;
    padding: 5px 12px;
  }

  .hero h1 {
    font-size: 1.95rem;
  }

  .hero p {
    font-size: 1rem;
    margin-bottom: 28px;
  }

  .hero-actions {
    flex-direction: column;
    gap: 12px;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .features {
    padding: 40px 0 60px;
  }

  .section-header {
    margin-bottom: 32px;
  }

  .section-header h2 {
    font-size: 1.6rem;
  }

  .grid-3 {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .card {
    padding: 22px 18px;
  }

  .steps {
    padding: 40px 0 60px;
  }

  .contact-cta {
    padding: 50px 0;
  }

  .cta-box {
    padding: 30px 18px;
  }

  .cta-box h2 {
    font-size: 1.5rem;
  }

  .cta-box p {
    font-size: 0.95rem;
  }

  .content-section {
    padding: 36px 0;
  }

  .content-box {
    padding: 22px 16px;
  }

  .content-box h1 {
    font-size: 1.7rem;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
    gap: 16px;
  }

  .footer-links {
    justify-content: center;
    flex-wrap: wrap;
    gap: 16px;
  }
}

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