.sch-sekcja {
  max-width: 800px;
  margin: 2rem auto;
  background: white;
  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;
}

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

.sch-naglowek {
  font-family: 'Poppins', sans-serif;
  font-size: 1.8rem;
  line-height: 1.2;
  margin: 0 0 1rem 0;
  color: var(--primary);
  display: inline-block;
  position: relative;
}

.sch-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;
}

.sch-naglowek.aktywne-underline::after {
  transform: scaleX(1);
}

.sch-tekst {
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-medium);
}

.sch-tekst ul {
  margin: 1rem 0;
  padding-left: 1.25rem;
}

.sch-tekst li {
  margin-bottom: 0.5rem;
}

.macierze-siata {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  margin-top: 1.5rem;
  justify-content: space-around;
  align-items: flex-start;
  padding-right: 1.5rem;
}

.macierz-kontener {
  position: relative;
  display: inline-block;
  vertical-align: top;
  padding: 0 1.25rem;
  margin: 0 1.5rem;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.sch-sekcja.aktywna .macierz-kontener {
  opacity: 1;
  transform: translateY(0);
}

.macierz-kontener::before,
.macierz-kontener::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1rem;
  box-sizing: border-box;
}

.macierz-kontener::before {
  left: 0;
  border-left: 2px solid var(--primary);
  border-top-left-radius: 0.5rem;
  border-bottom-left-radius: 0.5rem;
}

.macierz-kontener::after {
  right: -1px;
  border-right: 2px solid var(--primary);
  border-top-right-radius: 0.5rem;
  border-bottom-right-radius: 0.5rem;
}

.macierz {
  border-collapse: collapse;
}

.macierz td {
  padding: 0.3rem 0.6rem;
  font-family: monospace;
  text-align: center;
}

.macierz tr {
  opacity: 0;
  transform: translateX(-20px);
  animation: wierszWchodzi 0.4s ease-out forwards;
}

@keyframes wierszWchodzi {
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.powrot-btn {
  position: absolute;
  top: 1rem;
  right: 1rem;
  background-color: var(--primary);
  color: white;
  border: none;
  padding: 0.5rem 1rem;
  border-radius: 0.4rem;
  cursor: pointer;
  text-decoration: none;
  font-size: 0.95rem;
  font-family: 'Poppins', sans-serif;
  font-weight: 500;
  letter-spacing: 0.5px;
  transition: background-color 0.2s ease-in-out, transform 0.15s ease-in-out;
}

.powrot-btn:hover {
  background-color: color-mix(in srgb, var(--primary) 85%, black);
  transform: translateY(-2px);
}

.sch-sekcja.definicja {
  position: relative;
}

.fakt-kontener {
  background-color: #e6f0ff;
  border: 1px solid #b3d1ff;
  border-radius: 0.5rem;
  padding: 1rem 1.5rem;
  margin-bottom: 1rem;
  color: #0d2a63;
  font-family: 'Poppins', sans-serif;
}

.fakt-kontener em,
.fakt-tresc em {
  font-style: normal;
}

.fakt-naglowek {
  font-weight: bold;
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  text-align: center;
}

.fakt-tresc {
  margin: 0;
}

.fakt-uzasadnienie {
  margin-top: 0.5rem;
}

.link-operacje {
  color: #0d2a63;
  text-decoration: underline;
  text-underline-offset: 2px;
  cursor: pointer;

  position: relative;
  display: inline-block;
  padding: 0 .15rem;
  border-radius: .35rem;
  transition: transform .15s ease, color .2s ease, background-color .2s ease;
}

.link-operacje:hover {
  background: #eaf3ff;
}

.link-operacje:focus-visible {
  outline: 2px solid #b3d1ff;
  outline-offset: 2px;
  border-radius: .35rem;
}

.link-operacje.klik {
  transform: translateY(-1px) scale(0.98);
}

.link-operacje::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 0.25rem;
  height: 0.25rem;
  background: rgba(13, 42, 99, 0.18);
  border-radius: 999px;
  transform: translate(-50%, -50%) scale(0);
  pointer-events: none;
  opacity: 0;
}

.link-operacje.klik::after {
  animation: linkRipple .45s ease-out forwards;
}

@keyframes linkRipple {
  0%   { opacity: .35; transform: translate(-50%, -50%) scale(0); }
  100% { opacity: 0;   transform: translate(-50%, -50%) scale(6); }
}

.operacje-kontener {
  background: #f7fbff;
  border: 1px solid #d5e9ff;
  border-radius: 0.5rem;
  padding: 1rem 1.25rem;
  margin-top: 0;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.06);
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transform: translateY(-6px);
  pointer-events: none;

  transition:
    max-height .38s ease,
    opacity .28s ease,
    transform .38s ease,
    margin-top .38s ease;
}

.operacje-kontener.widoczny {
  max-height: var(--operacje-h, 600px);
  opacity: 1;
  transform: translateY(0);
  margin-top: 0.75rem;
  pointer-events: auto;
}

.operacje-naglowek {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.operacje-naglowek h3 {
  margin: 0;
  font-size: 1.05rem;
  color: var(--primary);
}

.operacje-zamknij {
  background: transparent;
  border: none;
  font-size: 1rem;
  line-height: 1;
  padding: 0.25rem 0.5rem;
  cursor: pointer;
  border-radius: 0.4rem;
  color: var(--text-dark);
}

.operacje-zamknij:hover {
  background: #eaf3ff;
}

.operacje-lista {
  list-style: none;
  padding-left: 0;
  margin: 0.25rem 0 0.75rem 0;
}

.operacje-lista li {
  list-style: none;
  padding-left: 0;
}

.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);
}

.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;
}