:root {
  /* Colors */
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --accent: #00d1ff;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  
  /* Spacing & Radii */
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 32px;
  --radius-md: 12px;
  
  /* Transitions */
  --transition: all 0.3s ease;
}

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

body {
  /* background-color: var(--bg-primary); */
  background-color: #0f172a; /* Slate-900 (Dunkel) */
  background-image: 
    radial-gradient(at 10% 10%, rgba(0, 120, 212, 0.3) 0px, transparent 50%),
    radial-gradient(at 90% 85%, rgba(80, 230, 255, 0.2) 0px, transparent 50%),
    radial-gradient(at 50% 50%, rgba(15, 23, 42, 1) 0px, transparent 100%);
  background-repeat: no-repeat; /* Zieht hier nicht, aber sicher ist sicher */
  background-size: cover;

  min-height: 100vh;
  color: var(--text-primary);
  font-family: 'Segoe UI', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
}

.header {
  margin-top: 1rem;
}

a {
  text-decoration: none;
}

.header ul {
  list-style-type: none;
  display: flex;
  gap: 1rem;
  align-items: center;
}

.header ul li {
  margin: 0;
  padding: 0;
}

.svg-header {
  border-radius: 50%;
  box-shadow: 0 1px 10px var(--accent);
  width: 40px;
}

.customButton{
  color: var(--text-primary);
  border: 1px solid #00d1ff;
  padding: 15px;
  border-radius: 15px;
}

.tag {
  display: inline-block;
  color: var(--text-primary);
  border: 1px solid transparent;
  border-radius: 30px;
  width: fit-content;
  height: fit-content;
  padding: 0 8px;
}

.tag-certs {
  border-color: #00d1ff;
}

.tag-certs a {
  text-decoration: none;
  color: #00d1ff;
}

.tag-angular {
  background: linear-gradient(#9120B8 0%, #F70745 100%);
  border-color: linear-gradient(#9120B8 0%, #F70745 100%) !important;
}

.tag-git{
  background: linear-gradient(#F05032 0%, #FF8A65 100%);
}
.tag-azure{
  background: linear-gradient(#0078D4 0%, #2892DF 100%);
}
.tag-springboot{
  background: linear-gradient(#6DB33F 0%, #92D466 100%);
}
.tag-terraform{
  background: linear-gradient(#844FBA 0%, #5C4EE5 100%);
}

.tag-content {
  padding: 0 8px;
}

.neon-card{
  width: fit-content;
  height: 100%;
  padding: 15px;

  border: 2px solid transparent;
  background: linear-gradient(#1e293b, #1e293b) padding-box,
  radial-gradient(circle at top left, var(--accent), transparent 50%),
  radial-gradient(circle at bottom right, var(--accent), transparent 50%),
  radial-gradient(circle at center, #8b5cf6, transparent 70%) border-box;
  background-origin: border-box;
  background-clip: padding-box, border-box;

  box-shadow: 0 0 15px #00d1ff;
  border-radius: 10px;
}

/* Timeline Styles */
.timeline {
  position: relative;
  max-width: 1200px;
  margin: 20px auto;
  padding: 20px 0;
}

.timeline-content ul {
  list-style-type: none;
  color: var(--text-secondary);
}

.timeline::after {
  content: '';
  position: absolute;
  width: 2px;
  background: var(--accent);
  top: 0;
  bottom: 0;
  left: 50%;
  margin-left: -1px;
  box-shadow: 0 0 10px var(--accent);
}

.timeline-item {
  padding: 10px 40px;
  position: relative;
  background-color: inherit;
  width: 50%;
}

.timeline-item::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  right: -8px;
  background-color: var(--bg-primary);
  border: 2px solid var(--accent);
  top: 15px;
  border-radius: 50%;
  z-index: 1;
  box-shadow: 0 0 8px var(--accent);
}

.left {
  left: 0;
}

.right {
  left: 50%;
}

.right::after {
  left: -8px;
}

.timeline-content {
  padding: 20px 30px;
  background: var(--bg-secondary);
  position: relative;
  border-radius: var(--radius-md);
  border: 1px solid rgba(0, 209, 255, 0.3);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.timeline-content h3 {
  color: var(--accent);
  margin-bottom: 10px;
}

.timeline-content p {
  margin-bottom: 0;
  color: var(--text-secondary);
}

/* Responsive Timeline */
@media screen and (max-width: 600px) {
  .timeline::after {
    left: 31px;
  }

  .timeline-item {
    width: 100%;
    padding-left: 70px;
    padding-right: 25px;
  }

  .timeline-item::after {
    left: 23px;
  }

  .right {
    left: 0%;
  }
}