@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;800&display=swap');

:root {
  --primary-color: #0d6efd;
  --secondary-color: #0dcaf0;
  --dark-bg: #0f172a;
  --card-bg: rgba(255, 255, 255, 0.05);
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --border-color: rgba(255, 255, 255, 0.1);
  --glass-blur: 12px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Inter', sans-serif;
}

body {
  background: radial-gradient(circle at top right, #1e293b, var(--dark-bg));
  color: var(--text-main);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Header & Hero Section */
.hero {
  text-align: center;
  padding: 3rem 2rem 2rem;
  background: linear-gradient(180deg, rgba(13, 110, 253, 0.15) 0%, transparent 100%);
  border-bottom: 1px solid var(--border-color);
}

.hero h1 {
  font-size: 2.8rem;
  font-weight: 800;
  background: linear-gradient(90deg, #38bdf8, #818cf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 1rem;
  letter-spacing: -1px;
}

.hero p {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 1000px;
  margin: 0 auto 1rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: linear-gradient(90deg, var(--primary-color), #3b82f6);
  color: #fff;
  text-decoration: none;
  padding: 0.8rem 2rem;
  font-size: 1.1rem;
  font-weight: 600;
  border-radius: 50px;
  box-shadow: 0 4px 15px rgba(13, 110, 253, 0.4);
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
  margin-top: 1rem;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(13, 110, 253, 0.6);
}

/* Section Containers */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 2rem;
}

.section-title {
  text-align: center;
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 2rem;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--secondary-color);
  margin: 0.8rem auto 0;
  border-radius: 2px;
}

/* Info Cards (Glassmorphism) */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.glass-card {
  background: var(--card-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 1.5rem 2rem;
  transition: transform 0.3s ease, border-color 0.3s ease;
  text-align: center;
}

.glass-card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
}

.data-icon {
  font-size: 2.2rem;
  margin-bottom: 0.8rem;
}

.glass-card h3 {
  font-size: 1.3rem;
  color: #38bdf8;
  margin-bottom: 0.8rem;
}

.glass-card p, .glass-card a {
  color: var(--text-muted);
  font-size: 0.95rem;
  text-decoration: none;
}

.glass-card a:hover {
  text-decoration: underline;
}

/* Data Content Grid */
.data-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

.data-item {
  flex: 0 0 180px;
  background: rgba(15, 23, 42, 0.6);
  border: 1px solid var(--border-color);
  border-radius: 15px;
  padding: 1.2rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  transition: all 0.3s ease;
}

.data-item:hover {
  background: rgba(15, 23, 42, 0.9);
  border-color: #818cf8;
  box-shadow: 0 4px 20px rgba(129, 140, 248, 0.15);
}

.data-item h4 {
  font-size: 1rem;
  color: #e2e8f0;
  margin-bottom: 0.5rem;
}

.data-item span {
  font-size: 0.8rem;
  color: #94a3b8;
  background: rgba(255, 255, 255, 0.1);
  padding: 0.2rem 0.6rem;
  border-radius: 20px;
  margin-top: 0.5rem;
}

/* Footer */
footer {
  text-align: center;
  padding: 1.5rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* Bottom Layout Custom Classes */
.pdf-image-placeholder {
  width: 100%;
  height: 120px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 1rem;
  background-color: rgba(255, 255, 255, 0.1);
  display: block;
}

.bottom-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-top: 3rem;
}

.elektro-optik-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 3rem;
}

.center-circle {
  background: radial-gradient(circle, #3b82f6, #1d4ed8);
  width: 180px;
  height: 180px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  box-shadow: 0 0 30px rgba(59, 130, 246, 0.5);
  margin-bottom: 2rem;
  z-index: 2;
}

.center-circle h3 {
  color: #fff;
  font-size: 1rem;
  margin: 0;
  line-height: 1.2;
}

.satellites-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

.sat-badge {
  background: rgba(245, 158, 11, 0.2);
  border: 1px solid rgba(245, 158, 11, 0.5);
  color: #fcd34d;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  text-align: center;
  font-size: 0.9rem;
  font-weight: 600;
}
.sat-badge small {
  font-size: 0.75rem;
  color: #fde68a;
  display: block;
  font-weight: normal;
}

.right-circles-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: center;
}

.circle-item {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: 50%;
  aspect-ratio: 1/1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 1rem;
  transition: transform 0.3s ease;
}

.circle-item:hover {
  transform: scale(1.05);
  background: rgba(16, 185, 129, 0.2);
}

.circle-item h4 {
  color: #6ee7b7;
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}

.circle-item p {
  color: #a7f3d0;
  font-size: 0.75rem;
  line-height: 1.2;
}

/* Responsive */
@media (max-width: 900px) {
  .bottom-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .hero h1 { font-size: 2.2rem; }
  .hero p { font-size: 0.95rem; }
  .circle-item h4 { font-size: 0.85rem; }
}