/* Dział i Solver: kolejne strony jednego tomu. */

.chapter-stage {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) minmax(230px, 290px);
  min-height: 480px;
  border: 1px solid var(--linia-mocna);
  background: var(--paper);
}

.chapter-number {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  padding: 28px 8px 20px;
  border-right: 1px solid var(--linia-mocna);
  background: var(--notebook-ink, var(--ground-dark));
  color: var(--notebook-paper, var(--paper));
}

.chapter-number span {
  font: 700 var(--pismo-mikro)/1 var(--mono);
  letter-spacing: .08em;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
}

.chapter-number i {
  width: 18px;
  height: 18px;
  border: 1px solid var(--notebook-paper, var(--paper));
  box-shadow: inset -5px 4px 0 var(--notebook-violet, var(--blue));
}

.chapter-copy {
  display: flex;
  min-width: 0;
  flex-direction: column;
  justify-content: center;
  padding: clamp(48px, 7vw, 86px);
  background:
    linear-gradient(90deg, transparent 0 58px, rgba(117, 102, 168, .14) 58px 59px, transparent 59px),
    repeating-linear-gradient(0deg, transparent 0 35px, rgba(23, 18, 24, .026) 35px 36px),
    var(--paper);
}

.chapter-copy h1 {
  max-width: 15ch;
  margin: 18px 0 12px;
  font: 560 clamp(2.8rem, 6vw, 5.4rem)/.92 var(--serif);
  letter-spacing: -.055em;
}

.chapter-note {
  margin: 0 0 28px;
  color: var(--muted);
}

.chapter-copy .primary-action {
  align-self: flex-start;
}

.chapter-register {
  padding: 40px 28px;
  border-left: 1px solid var(--linia-mocna);
  background: var(--paper-soft);
}

.chapter-register dl {
  margin: 20px 0 0;
}

.chapter-register dl div {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--rule);
}

.chapter-register dt {
  color: var(--muted);
  font: var(--pismo-mikro)/1.4 var(--mono);
  text-transform: uppercase;
}

.chapter-register dd {
  margin: 0;
  font: 700 .66rem/1.4 var(--mono);
}

.range-row {
  grid-template-columns: 56px minmax(0, 1fr) minmax(150px, auto) 64px 24px;
}

.range-row-arrow {
  color: var(--blue);
  text-align: right;
}

.solver-page {
  width: min(1180px, 100%);
}

.solver-breadcrumb {
  max-width: 1040px;
}

.poziom-filtr {
  display: flex;
  max-width: 1040px;
  gap: 14px;
  align-items: center;
  margin: 0 0 14px;
  font: var(--pismo-mikro)/1 var(--mono);
}

.poziom-filtr a {
  color: var(--tekst-slaby);
  text-decoration: none;
}

/* Aktywny poziom to tekst NA POWLOCE strony, nie na wypelnieniu - musi isc
   za --tekst. `--notebook-paper` znaczy dzis "kolor powierzchni", wiec dawal
   napis niewidoczny (jasny na jasnym, ciemny na ciemnym). */
.poziom-filtr strong {
  padding-bottom: 3px;
  border-bottom: 2px solid var(--akcent);
  color: var(--tekst);
}

.problem-stage {
  position: relative;
  display: grid;
  grid-template-columns: 158px minmax(0, 1fr);
  overflow: visible;
  border: 1px solid var(--linia-mocna);
  background: var(--paper);
}

.problem-stage::before {
  left: 158px;
  width: 1px;
  background: rgba(117, 102, 168, .22);
}

.problem-stage::after {
  top: 8px;
  right: -10px;
  bottom: 18px;
  left: auto;
  z-index: 2;
  width: 10px;
  border: 0;
  border-left: 1px solid rgba(23, 18, 24, .32);
  background: repeating-linear-gradient(0deg, var(--notebook-paper-soft, var(--paper-soft)) 0 3px, rgba(23, 18, 24, .15) 3px 4px);
  content: "";
}

.problem-register {
  position: relative;
  padding: 30px 18px 38px;
  border-right: 1px solid rgba(23, 18, 24, .34);
  background:
    linear-gradient(90deg, rgba(117, 102, 168, .14), transparent 22%),
    var(--paper-soft);
}

.problem-register::before {
  position: absolute;
  top: 28px;
  left: 0;
  width: 4px;
  height: 54px;
  background: var(--notebook-violet, var(--blue));
  content: "";
}

.problem-register::after {
  position: absolute;
  right: -12px;
  bottom: 26px;
  width: 12px;
  height: 58px;
  border: 1px solid var(--linia-mocna);
  border-left: 0;
  background: var(--notebook-ink, var(--ink));
  box-shadow: inset 0 4px 0 var(--notebook-lime, var(--yellow));
  content: "";
}

.problem-index {
  display: grid;
  gap: 8px;
  padding: 0 0 22px 8px;
  border-bottom: 1px solid var(--linia-mocna);
}

.problem-index strong {
  font: 560 clamp(2.8rem, 5vw, 4.2rem)/.86 var(--serif);
  letter-spacing: -.06em;
}

.problem-register dl {
  margin: 22px 0 0;
}

.problem-register dl div {
  padding: 10px 0 10px 8px;
  border-bottom: 1px solid var(--rule-strong);
}

.problem-register dt {
  color: var(--muted);
  font: .5rem/1.4 var(--mono);
  letter-spacing: .06em;
  text-transform: uppercase;
}

.problem-register dd {
  margin: 3px 0 0;
  overflow-wrap: anywhere;
  font: 700 var(--pismo-mikro)/1.45 var(--mono);
}

.problem-main {
  min-width: 0;
  padding: clamp(38px, 5vw, 68px) clamp(34px, 6vw, 82px) 64px;
  background:
    linear-gradient(90deg, transparent 0 58px, rgba(117, 102, 168, .12) 58px 59px, transparent 59px),
    repeating-linear-gradient(0deg, transparent 0 35px, rgba(23, 18, 24, .026) 35px 36px),
    var(--paper);
}

.problem-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 22px;
  align-items: end;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--linia-mocna);
}

.problem-heading h1 {
  max-width: 28ch;
  margin: 10px 0 0;
  font: 560 clamp(1.65rem, 3vw, 2.6rem)/1.08 var(--serif);
  letter-spacing: -.035em;
}

.problem-state {
  padding: 7px 9px;
  border: 1px solid rgba(117, 102, 168, .54);
}

.problem-paper {
  margin: 26px 0 0;
  padding: 28px 0 34px;
  border-bottom: 1px solid var(--linia-mocna);
  background: transparent;
}

.task-paper {
  max-width: 50ch;
  white-space: pre-wrap;
  font: 400 clamp(1.15rem, 2vw, 1.5rem)/1.65 var(--serif);
}

.task-figure {
  margin: 0;
}

.task-image {
  display: block;
  max-height: 700px;
  object-fit: contain;
  object-position: left top;
}

.system-note {
  margin: 0 0 22px;
  padding: 12px 14px;
  border-left: 3px solid var(--red);
  background: var(--red-soft);
  font-size: .84rem;
}

.brudnopis,
.sprawdzanie {
  margin-top: 36px;
  padding: 18px 0 0;
  border: 0;
  border-top: 1px solid rgba(23, 18, 24, .34);
  background: transparent;
}

.brudnopis {
  position: relative;
}

.brudnopis::before {
  position: absolute;
  top: -1px;
  left: 0;
  width: 48px;
  height: 2px;
  background: var(--notebook-violet, var(--blue));
  content: "";
}

.brudnopis-pasek {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.brudnopis-pasek > div:first-child {
  display: grid;
  gap: 4px;
}

.brudnopis-narzedzia {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  align-items: center;
}

.brudnopis-narzedzia button,
#sprawdz-model {
  min-height: 36px;
  padding: 8px 10px;
  border: 1px solid var(--linia-mocna);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  font: 700 var(--pismo-mikro)/1 var(--mono);
  letter-spacing: .04em;
  text-transform: uppercase;
}

.brudnopis-narzedzia button:hover,
.brudnopis-narzedzia button.is-active {
  border-color: var(--notebook-violet, var(--blue));
  color: var(--notebook-violet-deep, var(--blue));
}

#brudnopis-widok {
  height: 430px;
  border: 1px solid var(--linia-mocna);
  border-radius: 0;
}

#brudnopis-kadr {
  background: var(--powierzchnia);
}

.brudnopis-nota {
  margin: 8px 0 0;
  color: var(--muted);
  font: var(--pismo-mikro)/1.5 var(--mono);
}

.sprawdz-wynik {
  margin-top: 12px;
  padding: 16px;
  border: 1px solid var(--linia-mocna);
  background: var(--paper-soft);
  font-size: .86rem;
}

.sprawdz-wynik p {
  margin: 6px 0 0;
  white-space: pre-wrap;
}

.sprawdz-wynik.is-dobrze {
  border-left: 4px solid var(--good);
}

.sprawdz-wynik.is-czesciowo {
  border-left: 4px solid var(--amber);
}

.sprawdz-wynik.is-zle,
.sprawdz-wynik.is-blad {
  border-left: 4px solid var(--red);
}

.sprawdz-wynik.is-czeka {
  color: var(--muted);
}

.assessment-button.is-sugestia {
  box-shadow: inset 0 -3px 0 var(--blue);
}

.assessment-button .sugestia-ai {
  display: block;
  margin-top: 3px;
  font-size: var(--pismo-mikro);
  opacity: .7;
}

.solution {
  margin-top: 42px;
  border: 1px solid var(--linia-mocna);
}

.solution summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  min-height: 74px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
}

.solution summary::-webkit-details-marker {
  display: none;
}

.solution summary span:first-child {
  display: grid;
  gap: 4px;
  font: 560 clamp(1.25rem, 2.5vw, 1.8rem)/1.2 var(--serif);
}

.solution summary small {
  color: var(--muted);
  font: 700 var(--pismo-mikro)/1.3 var(--mono);
  letter-spacing: .06em;
  text-transform: uppercase;
}

.solution-toggle {
  color: var(--notebook-violet-deep, var(--blue));
  font: 400 1.8rem/1 var(--serif);
}

.solution[open] .solution-toggle {
  transform: rotate(45deg);
}

.solution-content {
  padding: 28px;
  border-top: 1px solid var(--linia-mocna);
  background: var(--powierzchnia-2);
}

.solution-block {
  white-space: pre-wrap;
  font: .95rem/1.65 var(--serif);
}

.solution-block + .solution-block {
  margin-top: 28px;
  padding-top: 28px;
  border-top: 1px solid var(--rule);
}

.solution-block strong {
  display: block;
  margin-bottom: 12px;
  font: 700 var(--pismo-mikro)/1.3 var(--mono);
  text-transform: uppercase;
}

.skill-note {
  color: var(--muted);
  font-size: .82rem;
}

.assessment {
  border: 1px solid var(--linia-mocna);
  border-top: 0;
  background: var(--paper-soft);
}

.assessment-copy {
  padding: 24px 28px;
  border-bottom: 1px solid var(--linia-mocna);
}

.assessment-copy h2 {
  margin: 8px 0 0;
  font: 560 clamp(1.5rem, 3vw, 2.4rem)/1.1 var(--serif);
  letter-spacing: -.035em;
}

.assessment-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.assessment-button {
  min-height: 100px;
  padding: 18px;
  border: 0;
  border-right: 1px solid var(--linia-mocna);
  border-radius: 0;
  background: transparent;
  color: var(--ink);
  text-align: left;
}

.assessment-button:last-child {
  border-right: 0;
}

.assessment-button:hover {
  background: var(--blue-soft);
}

.assessment-button strong {
  display: block;
  font: 560 1.05rem/1.2 var(--serif);
}

.assessment-button span {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font: var(--pismo-mikro)/1.4 var(--mono);
  text-transform: uppercase;
}

@media (max-width: 820px) {
  .problem-stage {
    grid-template-columns: 128px minmax(0, 1fr);
  }

  .problem-stage::before {
    left: 128px;
  }

  .problem-register {
    padding-inline: 14px;
  }

  .problem-main {
    padding-inline: 40px;
  }
}

@media (max-width: 620px) {
  .chapter-stage {
    grid-template-columns: 14px minmax(0, 1fr);
  }

  .chapter-number {
    grid-row: 1 / 3;
    padding: 18px 2px;
  }

  .chapter-number span,
  .chapter-number i {
    display: none;
  }

  .chapter-copy,
  .chapter-register {
    grid-column: 2;
  }

  .chapter-copy {
    padding: 46px 28px 40px 34px;
  }

  .chapter-register {
    padding: 30px 28px 34px 34px;
    border-top: 1px solid var(--linia-mocna);
    border-left: 0;
  }

  .solver-page {
    width: 100%;
  }

  .poziom-filtr {
    overflow-x: auto;
    white-space: nowrap;
  }

  .problem-stage {
    grid-template-columns: 1fr;
  }

  .problem-stage::before {
    left: 14px;
  }

  .problem-register {
    display: grid;
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 18px;
    padding: 26px 24px 24px 32px;
    border-right: 0;
    border-bottom: 1px solid var(--linia-mocna);
  }

  .problem-register::before {
    top: 0;
    bottom: 0;
    left: 0;
    width: 4px;
    height: auto;
  }

  .problem-register::after {
    top: 18px;
    right: -8px;
    bottom: auto;
    width: 8px;
    height: 46px;
  }

  .problem-index {
    padding: 0;
    border: 0;
  }

  .problem-register dl {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 16px;
    margin: 0;
  }

  .problem-register dl div {
    padding: 7px 0;
  }

  .problem-main {
    padding: 34px 22px 46px 32px;
  }

  .problem-heading {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .problem-state {
    justify-self: start;
  }

  .task-paper {
    font-size: 1.08rem;
  }

  #brudnopis-widok {
    height: 360px;
  }

  .assessment-grid {
    grid-template-columns: 1fr;
  }

  .assessment-button {
    min-height: 78px;
    border-right: 0;
    border-bottom: 1px solid var(--linia-mocna);
  }

  .assessment-button:last-child {
    border-bottom: 0;
  }
}