/* =========================================================
   DESIMALTALL
   Kun styles som er spesifikke for Desimaltall.
   Felles verktøystil styres av school-tool-standard.css
   ========================================================= */


/* OPERASJONER */

.decimal-operation-picker {
  width: min(100%, 560px);
  margin: 0 auto;

  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));

  gap: 10px;
}

.decimal-operation {
  min-height: 68px;

  padding: 11px 12px;

  border: 1px solid var(--line);
  border-radius: 9px;

  background: var(--surface);
  color: var(--text);

  text-align: left;

  cursor: pointer;
}

.decimal-operation strong {
  display: block;

  margin-bottom: 4px;

  font-size: 14px;
  font-weight: 700;
}

.decimal-operation span {
  display: block;

  color: var(--muted);

  font-size: 12px;
  line-height: 1.35;
}

.decimal-operation.active {
  border-color: var(--accent);

  box-shadow: inset 0 0 0 1px var(--accent);
}


/* INPUTS */

.decimal-input-grid {
  width: min(100%, 460px);
  margin: 0 auto;

  display: grid;
  grid-template-columns:
    minmax(120px, 180px)
    24px
    minmax(120px, 180px);

  gap: 18px;

  justify-content: center;
  align-items: end;
}

.decimal-input-grid > div:not(.operator) {
  width: 100%;
}

.decimal-input-grid label {
  display: block;

  margin-bottom: 8px;

  color: var(--muted);

  font-size: 13px;
  font-weight: 700;
}

.decimal-input-grid input {
  width: 100%;
  max-width: 180px;
  height: 50px;

  padding: 0 14px;

  border: 1px solid var(--line);
  border-radius: 8px;

  background: var(--bg);
  color: var(--text);

  font-size: 18px;
  font-weight: 700;
}

.decimal-input-grid input::placeholder {
  font-size: 14px;
  font-weight: 400;

  opacity: .7;
}

.operator {
  width: 24px;

  padding-bottom: 10px;

  color: var(--text);

  font-size: 28px;
  font-weight: 700;

  text-align: center;
}


/* PLASSVERDI – KORTVISNING */

.place-value {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));

  gap: 6px;

  margin-top: 12px;
}

.place-value div {
  padding: 10px 8px;

  border: 1px solid var(--line);
  border-radius: 8px;

  background: var(--bg);

  text-align: center;
}

.place-value strong {
  display: block;

  color: var(--text);

  font-size: 16px;
}

.place-value span {
  display: block;

  margin-top: 2px;

  color: var(--muted);

  font-size: 11px;
}


/* PLASSVERDI – FORKLARINGSTABELL */

.placevalue-table {
  display: grid;

  gap: 7px;

  margin-top: 14px;
}

.placevalue-row {
  display: grid;
  grid-template-columns:
    42px
    minmax(100px, 1fr)
    minmax(110px, 1fr);

  gap: 12px;

  align-items: center;

  padding: 9px 0;

  border-bottom: 1px solid var(--line);
}

.placevalue-row:last-child {
  border-bottom: 0;
}

.placevalue-digit {
  color: var(--text);

  font-size: 20px;
  font-weight: 800;
}

.placevalue-value {
  color: var(--muted);
}


/* ENKEL MELLOMREGNING */

.calculation-stack {
  display: inline-grid;

  gap: 4px;

  margin-top: 12px;
  padding: 12px 16px;

  font-variant-numeric: tabular-nums;

  font-size: 20px;
  font-weight: 700;
}

.calculation-row {
  display: grid;
  grid-template-columns: 24px 1fr;

  gap: 8px;

  text-align: right;
}

.calculation-result {
  padding-top: 5px;

  border-top: 2px solid var(--text);
}


/* KLASSISK SKOLEOPPSTILLING */

.classic-calculation {
  display: inline-block;

  margin: 18px 0 8px;
  padding: 14px 18px;

  overflow-x: auto;

  border: 1px solid var(--line);
  border-radius: 8px;

  background: var(--bg);
  color: var(--text);

  font-family: "Courier New", monospace;

  font-size: 21px;
  font-weight: 700;
  line-height: 1.35;

  white-space: pre;
}

.classic-calculation::first-line {
  color: var(--accent);

  font-size: 15px;
}


/* KOLONNEOPPSTILLING */

.school-calculation {
  display: inline-grid;

  gap: 2px;

  margin: 18px 0 8px;

  font-family: inherit;

  font-variant-numeric: tabular-nums;
}

.column-row {
  display: grid;
  grid-template-columns:
    16px
    repeat(var(--columns), 11px);

  align-items: end;

  min-height: 30px;
}

.column-symbol {
  font-family: inherit;

  font-size: 18px;
  font-weight: 700;

  text-align: center;
}

.column-cell {
  font-family: inherit;

  color: var(--text);

  font-size: 18px;
  font-weight: 700;
  line-height: 1.2;

  text-align: center;
}

.carry-line .column-cell {
  min-height: 18px;

  color: var(--accent);

  font-family: inherit;

  font-size: 12px;
  font-weight: 700;
}

.result-line {
  padding-top: 5px;

  border-top: 2px solid var(--text);
}


/* SKRIFTLIG OPPSTILLING */

.written-calculation {
  display: inline-flex;
  flex-direction: column;

  margin: 16px 0 8px;

  font-family: inherit;

  font-variant-numeric: tabular-nums;
}

.written-row {
  display: flex;

  align-items: flex-end;

  min-height: 23px;
}

.calc-sign {
  width: 18px;
  height: 20px;

  flex: 0 0 18px;

  display: flex;
  align-items: center;
  justify-content: center;

  color: var(--text);

  font-size: 18px;
  font-weight: 700;
  line-height: 20px;

  text-align: center;
}

.calc-cell {
  width: 13px;

  flex: 0 0 13px;

  color: var(--text);

  font-size: 18px;
  font-weight: 700;
  line-height: 1.1;

  text-align: center;
}

.carry-row {
  min-height: 14px;
}

.calc-carry {
  color: var(--accent);

  font-size: 11px;
  font-weight: 700;
}

.answer-row {
  margin-top: 3px;
  padding-top: 4px;

  border-top: 2px solid var(--text);
}


/* LÅNING VED SUBTRAKSJON */

.subtraction-top-row {
  margin-top: 20px;
}

.borrow-cell,
.changed-cell,
.borrowed-digit {
  position: relative;
}

.borrow-ten {
  position: absolute;

  left: -5px;
  top: -9px;

  color: var(--accent);

  font-size: 10px;
  font-weight: 700;
}

.changed-value {
  position: absolute;

  left: 50%;
  top: -11px;

  transform: translateX(-50%);

  color: var(--accent);

  font-size: 10px;
  font-weight: 700;
}

.old-value,
.borrowed-old {
  text-decoration: line-through;
  text-decoration-thickness: 1px;
}

.borrowed-new {
  position: absolute;

  left: 50%;
  bottom: 18px;

  transform: translateX(-50%);

  color: var(--accent);

  font-size: 11px;
  font-weight: 700;
  line-height: 1;

  white-space: nowrap;
}


/* ETT TALLFELT */

.decimal-input-grid.single-input-mode {
  display: flex;

  justify-content: center;
}

.decimal-input-grid.single-input-mode > div:not(.operator) {
  width: 180px;

  margin: 0;
}

.decimal-input-grid.single-input-mode input {
  width: 180px;
  max-width: 180px;
}


/* HOVER */

@media (hover: hover) and (pointer: fine) {
  .decimal-operation:hover {
    border-color: var(--accent);
  }
}


/* DARK MODE */

@media (prefers-color-scheme: dark) {
  .decimal-input-grid input {
    color-scheme: dark;
  }
}


/* MOBIL */

@media (max-width: 700px) {

  .decimal-input-grid {
    width: 100%;

    grid-template-columns: 1fr;
  }

  .decimal-input-grid > div:not(.operator) {
    width: min(100%, 260px);

    margin: 0 auto;
  }

  .decimal-input-grid input {
    max-width: none;
  }

  .operator {
    width: auto;

    margin: 2px 0;
    padding: 0;

    text-align: center;
  }

  .decimal-input-grid.single-input-mode > div:not(.operator) {
    width: min(100%, 220px);
  }

  .decimal-input-grid.single-input-mode input {
    width: 100%;
    max-width: none;
  }

}

@media (max-width: 620px) {

  .decimal-operation-picker {
    grid-template-columns: 1fr;
  }

}

@media (max-width: 520px) {

  .place-value {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .placevalue-row {
    grid-template-columns: 32px 1fr;
  }

  .placevalue-value {
    grid-column: 2;
  }

}

/* DESIMALTALL PÅ TALLINJA */

.decimal-numberline-wrap {
  margin-top: 14px;
  overflow-x: auto;
  padding-bottom: 4px;
}

.decimal-numberline {
  display: block;
  width: 100%;
  min-width: 520px;
  height: auto;
}

.numberline-main,
.numberline-tick {
  stroke: var(--text);
}

.numberline-main {
  stroke-width: 2.5;
}

.numberline-tick {
  stroke-width: 1.5;
}

.numberline-label {
  fill: var(--muted);
  font-size: 12px;
}

.numberline-marker-line {
  stroke: var(--accent);
  stroke-width: 2.5;
  stroke-dasharray: 5 4;
}

.numberline-marker {
  fill: var(--accent);
}

.numberline-point-label {
  fill: var(--text);
  font-size: 13px;
  font-weight: 800;
}

@media (max-width: 620px) {
  .decimal-operation-picker {
    grid-template-columns: 1fr;
  }

  .decimal-numberline {
    min-width: 460px;
  }
}

.numberline-solution-layout {
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, .85fr);
  gap: 28px;
}

.numberline-side {
  padding: 20px;
  border-radius: 12px;
}

.numberline-side .decimal-numberline-wrap {
  width: 100%;
  margin-top: 10px;
  overflow: visible;
}

.numberline-side .decimal-numberline {
  display: block;
  width: 100%;
  min-width: 0;
  height: auto;
}

.numberline-side .side-calculator-note strong {
  display: block;
  margin-top: 6px;
  color: var(--text);
  font-weight: 800;
  line-height: 1.7;
}

@media (max-width: 760px) {
  .numberline-solution-layout {
    grid-template-columns: 1fr;
  }

  .numberline-side {
    position: static;
  }
}

/* Tallinje i visuelt sidepanel – lesbar standard */
.numberline-side .numberline-label {
  font-size: 14px;
  font-weight: 700;
}

.numberline-side .numberline-point-label {
  font-size: 18px;
  font-weight: 900;
}

.numberline-side .numberline-main {
  stroke-width: 3;
}

.numberline-side .numberline-tick {
  stroke-width: 2;
}

.numberline-side .numberline-marker-line {
  stroke-width: 3;
}

.numberline-side .numberline-marker {
  r: 9;
}

/* Tallinje trenger større arbeidsflate enn standardverktøyet på desktop */
.solution-section.numberline-mode .tool-width {
  max-width: 1080px;
}

.solution-section.numberline-mode .numberline-solution-layout {
  grid-template-columns: minmax(0, 1fr) minmax(420px, .9fr);
}

@media (max-width: 900px) {
  .solution-section.numberline-mode .tool-width {
    max-width: 820px;
  }

  .solution-section.numberline-mode .numberline-solution-layout {
    grid-template-columns: 1fr;
  }

  .solution-section.numberline-mode .numberline-side {
    position: static;
  }
}

.numberline-zoom-note {
  margin: 0 0 8px;
  padding: 8px 10px;
  border-radius: 8px;
  background: var(--surface);
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  text-align: center;
}