/* Grundlayout */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background-color: #050816;
  color: #e5e7eb;
  line-height: 1.6;
}

/* Container & Sections */
.container {
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section {
  padding: 4rem 0;
}

.section-inner {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.section h2 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.section-intro {
  max-width: 640px;
  color: #9ca3af;
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(5, 8, 22, 0.88);
  border-bottom: 1px solid rgba(55, 65, 81, 0.6);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.9rem;
  background: radial-gradient(circle at 0% 0%, #22d3ee, #1d4ed8);
  color: #0b1120;
}

.logo-text {
  font-weight: 600;
  letter-spacing: 0.03em;
}

.nav {
  display: flex;
  gap: 1.25rem;
  font-size: 0.9rem;
}

.lang-switch {
  padding: 0.25rem 0.8rem;
  border-radius: 999px;
  border: 1px solid #4b5563;
  margin-left: 0.5rem;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.lang-switch:hover {
  border-color: #6b7280;
  background: rgba(15, 23, 42, 0.9);
}


.nav a {
  text-decoration: none;
  color: #d1d5db;
  position: relative;
  padding-bottom: 0.1rem;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.15rem;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #22d3ee, #1d4ed8);
  transition: width 0.2s ease;
}

.nav a:hover::after {
  width: 100%;
}

/* Hero */
.hero {
  padding: 5rem 0 3rem;
  background: radial-gradient(circle at top, rgba(37, 99, 235, 0.25), transparent 60%);
}

.hero-inner {
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.hero-kicker {
  text-transform: uppercase;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: #9ca3af;
}

.hero h1 {
  font-size: clamp(2.2rem, 4vw, 3rem);
  margin: 0.5rem 0 0.75rem;
}

.hero-subtitle {
  max-width: 640px;
  color: #9ca3af;
}

.accent {
  background: linear-gradient(90deg, #22d3ee, #1d4ed8);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.5rem;
}

.hero-actions .btn {
  min-width: 150px;
  text-align: center;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.4rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 0.9rem;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.12s ease, border-color 0.12s ease;
}

.btn.primary {
  background: linear-gradient(90deg, #22d3ee, #1d4ed8);
  color: #0b1120;
  font-weight: 600;
  box-shadow: 0 12px 30px rgba(37, 99, 235, 0.35);
}

.btn.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 35px rgba(37, 99, 235, 0.5);
}

.btn.ghost {
  border-color: #4b5563;
  color: #e5e7eb;
  background: transparent;
}

.btn.ghost:hover {
  border-color: #6b7280;
  background: rgba(15, 23, 42, 0.8);
}

/* Layout: Zweispaltig, Grids */
.two-columns {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  gap: 2rem;
  align-items: flex-start;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

/* Cards & Info-Boxen */
.card,
.info-card {
  background: radial-gradient(circle at top left, rgba(30, 64, 175, 0.2), rgba(17, 24, 39, 0.95));
  border-radius: 0.9rem;
  padding: 1.25rem 1.5rem;
  border: 1px solid rgba(55, 65, 81, 0.8);
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.7);
}

.card h3,
.info-card h3 {
  margin-top: 0;
  margin-bottom: 0.4rem;
}

.meta {
  font-size: 0.85rem;
  color: #9ca3af;
}

/* Info-Listen */
.info-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.info-list li {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  font-size: 0.9rem;
}

.info-list li span:first-child {
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.7rem;
  color: #9ca3af;
}

.info-list a {
  color: #e5e7eb;
  text-decoration: none;
}

.info-list a:hover {
  text-decoration: underline;
}

/* Timeline */
.timeline {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.timeline-item {
  position: relative;
  padding-left: 1.5rem;
  border-left: 1px solid rgba(55, 65, 81, 0.9);
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -0.4rem;
  top: 0.35rem;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: linear-gradient(90deg, #22d3ee, #1d4ed8);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.3);
}

.timeline-header h3 {
  margin: 0 0 0.15rem;
}

.timeline-meta {
  font-size: 0.85rem;
  color: #9ca3af;
}

.timeline-item ul {
  margin: 0.5rem 0 0;
  padding-left: 1.1rem;
  font-size: 0.9rem;
}

/* Tag-Liste */
.tag-list {
  list-style: none;
  margin: 0.4rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  font-size: 0.85rem;
}

.tag-list li {
  padding: 0.18rem 0.6rem;
  border-radius: 999px;
  border: 1px solid rgba(75, 85, 99, 0.9);
  background: rgba(15, 23, 42, 0.9);
}

/* Footer */
.site-footer {
  border-top: 1px solid rgba(55, 65, 81, 0.8);
  padding: 1.25rem 0 1.75rem;
  background: #020617;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0 1.5rem;
  color: #9ca3af;
  font-size: 0.85rem;
}

.footer-note {
  opacity: 0.9;
}

/* Links generell */
a {
  color: #22d3ee;
}

a:hover {
  color: #7dd3fc;
}

/* Responsive Anpassungen */
@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }

  .nav {
    flex-wrap: wrap;
    justify-content: flex-start;
  }

  .two-columns {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 4rem;
  }

  .hero-actions {
    flex-direction: row;
  }
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.4rem;

  padding: 0.25rem 0.75rem;
  border-radius: 999px;

  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(75, 85, 99, 0.9);

  color: #e5e7eb;
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;

  transition: background 0.15s ease, border-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.project-link:hover {
  background: rgba(30, 64, 175, 0.9);
  border-color: rgba(96, 165, 250, 0.9);
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.7);
}