:root {
  --bg: #F5F5F5;
  --primary: #3366CC;
  --primary-light: #6699FF;
  --text-dark: #333333;
  --text-medium: #555555;
}

.anim-wejscie {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .6s ease-out, transform .6s ease-out;
  will-change: opacity, transform;
}

.anim-wejscie.aktywna {
  opacity: 1;
  transform: translateY(0);
}

.przyklady-strona {
  max-width: 1200px;
  width: 100%;
  margin: 0;
  padding: 1rem 0 3rem;
}

.sekcja-naglowek {
  text-align: center;
  margin-bottom: .5rem;
}

.sch-naglowek {
  font-family: 'Poppins', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  font-weight: 800;
  font-size: clamp(1.8rem, 1.2rem + 2.2vw, 2.8rem);
  line-height: 1.15;
  letter-spacing: .2px;

  background: linear-gradient(
    90deg,
    #1f242b 0%,
    #2a3038 20%,
    #3a414e 50%,
    #596373 80%,
    #6b7483 100%
  );
  background-size: 300% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;

  text-shadow: 0 1px 0 rgba(0,0,0,.04);

  position: relative;
  display: block;
  padding-bottom: .7rem;

  animation: schGradient 12s ease-in-out infinite alternate;
}

.sch-naglowek::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 4px;
  border-radius: 3px;
  background: linear-gradient(90deg, #4b5563, #9aa4b2);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 1.1s cubic-bezier(.2,.65,.2,1);
}

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

.sch-naglowek:hover {
  filter: drop-shadow(0 2px 10px rgba(51,102,204,.08));
}

@keyframes schGradient {
  0% {
    background-position: 0% 50%;
  }
  100% {
    background-position: 100% 50%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .sch-naglowek {
    animation: none;
  }
}

.przyklady-toolbar {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: .75rem;
  margin: 0 0 1rem;
  margin-left: -1rem;
}

.lista-przykladow {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 1.25rem;
  margin-left: -1rem;
}

.sekcja-przyklad {
  width: 220px;
  min-height: 220px;
  background: #ffffff;
  padding: 1.25rem 1.25rem 1rem;
  border-radius: 0.6rem;
  box-shadow: 0 10px 24px rgba(0,0,0,.06);
  align-self: flex-start;
  display: flex;
  align-items: center;
  justify-content: center;
}

.przyklad-zawartosc {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .8rem;
  text-align: center;
  width: 100%;
}

.sekcja-przyklad .przyklad-title {
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
  font-size: 1.1rem;
  line-height: 1.2;
  color: var(--primary);
  margin: 0;
  padding-bottom: .4rem;
  position: relative;
  width: max-content;
}

.sekcja-przyklad .przyklad-title::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 0;
  width: 120px;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  transform: translateX(-50%) scaleX(0);
  transform-origin: center;
  transition: transform .45s ease-out;
}

.sekcja-przyklad.aktywna .przyklad-title::after {
  transform: translateX(-50%) scaleX(1);
}

.sekcja-przyklad .macierz tr {
  opacity: 0;
  transform: translateX(-20px);
}

.sekcja-przyklad.aktywna .macierz tr {
  animation: wierszWchodzi .4s ease-out forwards;
}

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

.przyklad-body {
  max-height: 150px;
  overflow: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.przyklad-body::-webkit-scrollbar {
  display: none;
}

.macierz-wrap {
  position: relative;
  display: inline-block;
  padding: .75rem 1.25rem;
}

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

.macierz-wrap::before {
  left: 0;
  border-left: 2px solid var(--primary);
  border-top-left-radius: .5rem;
  border-bottom-left-radius: .5rem;
}

.macierz-wrap::after {
  right: -1px;
  border-right: 2px solid var(--primary);
  border-top-right-radius: .5rem;
  border-bottom-right-radius: .5rem;
}

.macierz {
  border-collapse: collapse;
}

.macierz td {
  padding: .22rem .55rem;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  text-align: center;
  color: var(--text-dark);
}

.btn-rozwiaz {
  appearance: none;
  border: none;
  outline: none;
  cursor: pointer;
  display: inline-block;
  padding: .6rem 1.1rem;
  border-radius: .5rem;
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  letter-spacing: .2px;
  transition: transform .15s ease, background-color .2s ease;
}

.btn-rozwiaz:hover {
  background-color: color-mix(in srgb, var(--primary) 85%, black);
  transform: translateY(-1px);
}

.powrot-btn {
  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);
}

@media (max-width: 640px) {
  .lista-przykladow {
    margin-left: 0;
  }

  .przyklady-toolbar {
    margin-left: 0;
    justify-content: center;
  }

  .sekcja-przyklad {
    width: 100%;
    min-height: unset;
  }

  .sekcja-przyklad .przyklad-title::after {
    width: 120px;
  }
}