.gauss-sekcja {
  max-width: 800px;
  margin: 0 auto;
  background: #ffffff;
  padding: 2rem;
  border-radius: 0.5rem;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.gauss-sekcja.aktywna {
  opacity: 1;
  transform: translateY(0);
}

.gauss-naglowek {
  font-size: 1.75rem;
  margin: 0 0 1rem 0;
  color: var(--primary);
  display: inline-block;
  position: relative;
  line-height: 1.2;
}

.gauss-naglowek::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 2px;
  background-color: var(--primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s ease;
}
.gauss-naglowek.aktywne-underline::after {
  transform: scaleX(1);
}

.gauss-tekst {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text, #0f172a);
}

.gauss-tekst p { margin: 0.5rem 0 1rem; }
.gauss-tekst ol { margin-left: 1.25rem; }

.link-wewnetrzny {
  position: relative;
  text-decoration: none;
  color: var(--primary);
  padding-bottom: 2px;
}

.link-wewnetrzny::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px; width: 0%;
  background: currentColor;
  transition: width 0.25s ease;
}

.link-wewnetrzny:hover { color: var(--primary-light); }
.link-wewnetrzny:hover::after { width: 100%; }

.gauss-podsekcje { margin-top: 1.25rem; }

.gauss-podsekcje h3 {
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
  font-size: 1.25rem;
  color: var(--primary);
}

.gauss-podsekcje .uwaga {
  background: #f8fafc;
  border-left: 4px solid var(--primary);
  padding: 0.75rem 1rem;
  border-radius: 0.25rem;
}

.macierz-tex {
  background: rgba(15, 23, 42, 0.04);
  padding: 0.75rem 1rem;
  border-radius: 0.375rem;
  overflow-x: auto;
}

.gauss-sekcja + .gauss-sekcja { margin-top: 2rem; }

.cta-center {
  text-align: center;
  margin-top: 2rem;
  margin-bottom: 2rem;
}

@media (min-width: 1024px) {
  .gauss-sekcja + .gauss-sekcja { margin-top: 2.5rem; }
  .cta-center { margin-top: 2.5rem; margin-bottom: 2.25rem; }
}

.btn-przyklady {
  display: inline-block;
  background-color: var(--primary);
  color: #fff;
  padding: 0.75rem 1.5rem;
  border-radius: 0.4rem;
  font-size: 1rem;
  text-decoration: none;
  font-weight: 500;
  transition: background-color .2s ease-in-out, transform .15s ease-in-out;
}
.btn-przyklady:hover {
  background-color: color-mix(in srgb, var(--primary) 85%, black);
  transform: translateY(-2px);
}

@keyframes odbicie {
  0% { transform: scale(1); }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); }
}

.link-wewnetrzny.klik,
.btn-przyklady.klik {
  animation: odbicie 0.3s ease;
}

.odnosnik-zrodlo {
  font-size: 0.8em;
  vertical-align: super;
  margin-left: 4px;
  color: #666666;
}

.odnosnik-zrodlo a {
  color: inherit;
  text-decoration: none;
}

.odnosnik-zrodlo a:hover {
  text-decoration: underline;
}