:root {
  --bg-dark: #020617;
  --accent-blue: #3b82f6;
}

/* Pozadí s velmi decentním zářením z rohů */
body {
  background-color: var(--bg-dark);
  background-image: 
    radial-gradient(at 0% 0%, rgba(59, 130, 246, 0.12) 0px, transparent 50%),
    radial-gradient(at 100% 0%, rgba(29, 78, 216, 0.06) 0px, transparent 50%);
  min-height: 100vh;
}

/* Horní linka indikující čtení */
#progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  background: linear-gradient(to right, #2563eb, #60a5fa, #2563eb);
  width: 0%;
  z-index: 100;
  transition: width 0.1s ease;
}

/* Jemný glow efekt pod hlavním nadpisem */
.text-glow {
  text-shadow: 0 0 40px rgba(59, 130, 246, 0.25);
}

/* Tlačítka z rychlé navigace v Hero */
.quick-nav-card {
  backdrop-filter: blur(8px);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}
.quick-nav-card:hover {
  transform: translateY(-2px);
  background: rgba(30, 41, 59, 0.6);
  box-shadow: 0 12px 24px -10px rgba(0, 0, 0, 0.5);
}

/* Zjednodušené karty článků v řádkovém seznamu */
.article-list-item {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1.25rem;
  background: rgba(255, 255, 255, 0.01);
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: 1rem;
  transition: all 0.2s ease;
  text-decoration: none;
}
.article-list-item:hover {
  background: rgba(255, 255, 255, 0.03);
  border-color: rgba(59, 130, 246, 0.3);
  transform: translateX(4px);
}
.article-list-item h4 {
  color: #f1f5f9;
  font-weight: 700;
  font-size: 1.125rem;
  margin-bottom: 0.25rem;
  transition: color 0.2s;
}
.article-list-item:hover h4 {
  color: #60a5fa;
}
.article-list-item p {
  color: #94a3b8;
  font-size: 0.875rem;
  line-height: 1.5;
}

/* Štítky témat na konci řádků */
.article-badge {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #94a3b8;
  background: rgba(255, 255, 255, 0.05);
  padding: 0.35rem 0.65rem;
  border-radius: 0.5rem;
  shrink-0: 1;
}

/* Odkazy v pravém panelu */
.sidebar-link {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: #cbd5e1;
  padding: 0.25rem 0;
  transition: all 0.2s;
}
.sidebar-link:hover {
  color: #fff;
  transform: translateX(2px);
}
.start-card {
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.05);
  transition: all 0.2s ease;
  text-decoration: none;
}

.start-card:hover {
  background: rgba(255,255,255,0.05);
  border-color: rgba(59,130,246,0.4);
  transform: translateY(-3px);
}