/* CALCULUS.CSS
   Calculus operator styles for Calcunator.
   Built to work with math-input-core.js.
*/

/* Shared calculus slots */

.calcunator-calculus-slot {
  display: inline-block;
  min-width: 0;
  min-height: 1em;
  padding: 0 2px;
  border: 1px solid transparent;
  box-sizing: border-box;
  text-align: center;
  white-space: nowrap;
  line-height: 1.15;
  outline: none;
  pointer-events: auto;
  vertical-align: baseline;
  font-weight: 400;
  background: transparent;
}

.calcunator-calculus-slot[data-empty="true"] {
  min-width: 30px;
  padding-left: 4px;
  padding-right: 4px;
}

.calcunator-calculus-small-slot {
  min-width: 14px;
  padding-left: 2px;
  padding-right: 2px;
  font-size: 0.72em;
  line-height: 1;
}

.calcunator-calculus-small-slot[data-empty="true"] {
  min-width: 14px;
  padding-left: 3px;
  padding-right: 3px;
}

.calcunator-calculus-slot[data-empty="false"] {
  min-width: 0;
  padding-left: 2px;
  padding-right: 2px;
}

.calcunator-calculus-slot:focus {
  border-color: #cccccc;
}

/* Derivatives */

.calcunator-derivative-container {
  position: relative;
  display: inline-flex;
  align-items: center;
  vertical-align: middle;
  white-space: nowrap;
  line-height: 1;
  min-height: 44px;
  margin: 0 2px;
  pointer-events: none;
  overflow: visible;
}

.calcunator-derivative-operator {
  display: inline-grid;
  grid-template-rows: auto 1px auto;
  justify-items: center;
  align-items: center;
  min-width: 34px;
  margin-right: 5px;
  line-height: 1;
  pointer-events: none;
  vertical-align: middle;
}

.calcunator-derivative-top,
.calcunator-derivative-bottom {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 14px;
  font-size: 0.9em;
  line-height: 1;
  pointer-events: none;
  white-space: nowrap;
}

.calcunator-derivative-line {
  display: block;
  width: 100%;
  min-width: 28px;
  height: 1px;
  background: #000000;
  pointer-events: none;
}

.calcunator-derivative-variable {
  display: inline-block;
  min-width: 0;
  min-height: 1em;
  padding: 0 1px;
  border: 1px solid transparent;
  box-sizing: border-box;
  text-align: center;
  white-space: nowrap;
  line-height: 1;
  outline: none;
  pointer-events: auto;
  background: transparent;
}

.calcunator-derivative-variable[data-empty="true"] {
  min-width: 10px;
  border-color: #cccccc;
}

.calcunator-derivative-variable[data-empty="false"] {
  min-width: 0;
}

.calcunator-derivative-container:focus-within .calcunator-derivative-variable,
.calcunator-derivative-container:focus-within .calcunator-derivative-argument {
  border-color: #cccccc;
}

.calcunator-derivative-argument {
  display: inline-block;
  min-width: 30px;
  min-height: 1em;
  padding: 0 4px;
  border: 1px solid transparent;
  box-sizing: border-box;
  text-align: center;
  white-space: nowrap;
  line-height: 1.25;
  outline: none;
  pointer-events: auto;
  vertical-align: middle;
  background: transparent;
}

.calcunator-derivative-argument[data-empty="false"] {
  min-width: 0;
  padding-left: 2px;
  padding-right: 2px;
}

/* Limits */

.calcunator-limit-container {
  position: relative;
  display: inline-flex;
  align-items: center;
  vertical-align: middle;
  white-space: nowrap;
  line-height: 1;
  min-height: 42px;
  margin: 0 2px;
  pointer-events: none;
  overflow: visible;
}

.calcunator-limit-operator {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin-right: 5px;
  line-height: 1;
  pointer-events: none;
}

.calcunator-limit-label {
  display: inline-block;
  font-size: 1em;
  line-height: 1;
  pointer-events: none;
}

.calcunator-limit-sub {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 1px;
  font-size: 0.72em;
  line-height: 1;
  pointer-events: none;
}

.calcunator-limit-variable,
.calcunator-limit-target {
  display: inline-block;
  min-width: 0;
  min-height: 1em;
  padding: 0 1px;
  border: 1px solid transparent;
  box-sizing: border-box;
  text-align: center;
  white-space: nowrap;
  line-height: 1;
  outline: none;
  pointer-events: auto;
  background: transparent;
}

.calcunator-limit-variable[data-empty="true"],
.calcunator-limit-target[data-empty="true"] {
  min-width: 12px;
  border-color: #cccccc;
}

.calcunator-limit-side {
  display: inline-block;
  font-size: 0.78em;
  line-height: 1;
  margin-left: 1px;
  pointer-events: none;
}

.calcunator-limit-argument {
  display: inline-block;
  min-width: 30px;
  min-height: 1em;
  padding: 0 4px;
  border: 1px solid transparent;
  box-sizing: border-box;
  text-align: center;
  white-space: nowrap;
  line-height: 1.25;
  outline: none;
  pointer-events: auto;
  vertical-align: middle;
  background: transparent;
}

.calcunator-limit-argument[data-empty="false"] {
  min-width: 0;
  padding-left: 2px;
  padding-right: 2px;
}

.calcunator-limit-container:focus-within .calcunator-limit-variable,
.calcunator-limit-container:focus-within .calcunator-limit-target,
.calcunator-limit-container:focus-within .calcunator-limit-argument {
  border-color: #cccccc;
}

/* Single integral */

.calcunator-integral-container {
  position: relative;
  display: inline-flex;
  align-items: center;
  vertical-align: middle;
  white-space: nowrap;
  line-height: 1;
  min-height: 42px;
  margin: 0 2px;
  pointer-events: none;
  overflow: visible;
}

.calcunator-integral-symbol {
  display: inline-block;
  font-size: 1.85em;
  line-height: 1;
  font-weight: 400;
  margin-right: 4px;
  pointer-events: none;
  user-select: none;
}

.calcunator-integral-integrand {
  display: inline-block;
  min-width: 30px;
  min-height: 1em;
  padding: 0 4px;
  border: 1px solid transparent;
  box-sizing: border-box;
  text-align: center;
  white-space: nowrap;
  line-height: 1.25;
  outline: none;
  pointer-events: auto;
  vertical-align: middle;
  background: transparent;
}

.calcunator-integral-integrand[data-empty="false"] {
  min-width: 0;
  padding-left: 2px;
  padding-right: 2px;
}

.calcunator-integral-d {
  display: inline-block;
  margin-left: 5px;
  pointer-events: none;
}

.calcunator-integral-variable {
  display: inline-block;
  min-width: 0;
  min-height: 1em;
  padding: 0 1px;
  border: 1px solid transparent;
  box-sizing: border-box;
  text-align: center;
  white-space: nowrap;
  line-height: 1;
  outline: none;
  pointer-events: auto;
  background: transparent;
}

.calcunator-integral-variable[data-empty="true"] {
  min-width: 10px;
  border-color: #cccccc;
}

.calcunator-integral-container:focus-within .calcunator-integral-integrand,
.calcunator-integral-container:focus-within .calcunator-integral-variable {
  border-color: #cccccc;
}

/* Definite integral */

.calcunator-def-integral-container {
  --integral-size: 1.75em;
  --stack-width: 34px;
  --limit-size: 16px;
  --container-height: 62px;

  position: relative;
  display: inline-flex;
  align-items: center;
  vertical-align: middle;
  white-space: nowrap;
  line-height: 1;
  height: var(--container-height);
  min-height: var(--container-height);
  margin: 0 2px;
  pointer-events: none;
  overflow: visible;
}

.calcunator-def-integral-stack {
  position: relative;
  display: inline-block;
  width: var(--stack-width);
  min-width: var(--stack-width);
  height: var(--container-height);
  min-height: var(--container-height);
  line-height: 1;
  pointer-events: none;
  overflow: visible;
}

.calcunator-def-integral-symbol {
  position: absolute;
  left: calc(var(--stack-width) / 2);
  top: 50%;
  display: inline-block;
  font-size: var(--integral-size);
  line-height: 1;
  transform: translate(-50%, -50%);
  pointer-events: none;
  user-select: none;
}

.calcunator-def-integral-limit {
  position: absolute;
  left: calc((var(--stack-width) - var(--limit-size)) / 2);
  z-index: 3;
  display: inline-block;
  width: var(--limit-size);
  min-width: var(--limit-size);
  height: var(--limit-size);
  min-height: var(--limit-size);
  padding: 0;
  border: 0;
  box-sizing: border-box;
  text-align: center;
  white-space: nowrap;
  font-size: 0.72em;
  line-height: var(--limit-size);
  outline: none;
  pointer-events: auto;
  background: transparent;
}

.calcunator-def-integral-upper {
  top: 0;
}

.calcunator-def-integral-lower {
  bottom: 0;
}

.calcunator-def-integral-limit[data-empty="true"] {
  box-shadow: inset 0 0 0 1px #cccccc;
}

.calcunator-def-integral-limit[data-empty="false"] {
  width: auto;
  min-width: var(--limit-size);
  padding-left: 2px;
  padding-right: 2px;
}

.calcunator-def-integral-integrand {
  display: inline-block;
  min-width: 30px;
  min-height: 1em;
  padding: 0 4px;
  margin-left: 6px;
  border: 1px solid transparent;
  box-sizing: border-box;
  text-align: center;
  white-space: nowrap;
  line-height: 1.25;
  outline: none;
  pointer-events: auto;
  vertical-align: middle;
  background: transparent;
}

.calcunator-def-integral-integrand[data-empty="false"] {
  min-width: 0;
  padding-left: 2px;
  padding-right: 2px;
}

.calcunator-def-integral-container:focus-within .calcunator-def-integral-limit {
  box-shadow: inset 0 0 0 1px #cccccc;
}

.calcunator-def-integral-container:focus-within .calcunator-def-integral-integrand,
.calcunator-def-integral-container:focus-within .calcunator-integral-variable {
  border-color: #cccccc;
}

/* Double integral */

.double-integral-container,
.calcunator-double-integral-container {
  --integral-size: 1.62em;
  --stack-base-width: 34px;
  --limit-size: 16px;
  --container-height: 66px;

  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;

  height: var(--container-height);
  min-height: var(--container-height);

  margin: 0 2px;
  padding: 0;

  vertical-align: middle;
  align-self: center;
  line-height: 1;
  white-space: nowrap;
  overflow: visible;
  pointer-events: none;
  font-family: inherit;
}

.double-integral-outer-stack,
.double-integral-inner-stack,
.calcunator-double-integral-outer-stack,
.calcunator-double-integral-inner-stack {
  position: relative;
  display: inline-block;

  flex: 0 0 var(--stack-base-width);
  width: var(--stack-base-width);
  min-width: var(--stack-base-width);

  height: var(--container-height);
  min-height: var(--container-height);

  line-height: 1;
  vertical-align: middle;
  overflow: visible;
  pointer-events: none;
}

.double-integral-inner-stack,
.calcunator-double-integral-inner-stack {
  margin-left: -14px;
}

.double-integral-symbol,
.calcunator-double-integral-symbol {
  position: absolute;
  left: calc(var(--stack-base-width) / 2);
  top: 50%;

  display: inline-block;
  font-size: var(--integral-size);
  line-height: 1;
  font-weight: 400;

  transform: translate(-50%, -50%);
  pointer-events: none;
  user-select: none;
}

.double-integral-limit,
.calcunator-double-integral-limit,
.double-integral-outer-upper,
.double-integral-outer-lower,
.double-integral-inner-upper,
.double-integral-inner-lower,
.calcunator-double-integral-outer-upper,
.calcunator-double-integral-outer-lower,
.calcunator-double-integral-inner-upper,
.calcunator-double-integral-inner-lower {
  position: absolute;
  left: calc((var(--stack-base-width) - var(--limit-size)) / 2);
  z-index: 3;

  display: inline-block;
  width: var(--limit-size);
  min-width: var(--limit-size);
  height: var(--limit-size);
  min-height: var(--limit-size);

  padding: 0;
  margin: 0;
  border: 0;
  box-sizing: border-box;

  text-align: center;
  white-space: nowrap;
  font-family: inherit;
  font-size: 0.72em;
  line-height: var(--limit-size);
  font-weight: 400;

  background: transparent;
  outline: none;
  pointer-events: auto;
  vertical-align: middle;
  overflow: visible;
}

.double-integral-outer-upper,
.double-integral-inner-upper,
.calcunator-double-integral-outer-upper,
.calcunator-double-integral-inner-upper {
  top: 0;
}

.double-integral-outer-lower,
.double-integral-inner-lower,
.calcunator-double-integral-outer-lower,
.calcunator-double-integral-inner-lower {
  bottom: 0;
}

.double-integral-limit[data-empty="true"],
.calcunator-double-integral-limit[data-empty="true"] {
  box-shadow: inset 0 0 0 1px #cccccc;
}

.double-integral-limit[data-empty="false"],
.calcunator-double-integral-limit[data-empty="false"] {
  width: auto;
  min-width: var(--limit-size);
  padding-left: 2px;
  padding-right: 2px;
  box-shadow: none;
}

.double-integral-integrand,
.calcunator-double-integral-integrand {
  display: inline-block;
  min-width: 30px;
  min-height: 1em;
  height: auto;

  padding: 0 2px;
  margin: 0 0 0 7px;

  border: 1px solid transparent;
  box-shadow: none;
  box-sizing: border-box;

  text-align: center;
  white-space: nowrap;
  font-family: inherit;
  font-size: 1em;
  line-height: 1.35;
  font-weight: 400;

  outline: none;
  pointer-events: auto;
  vertical-align: baseline;
  background: transparent;
  overflow: visible;
}

.double-integral-integrand[data-empty="true"],
.calcunator-double-integral-integrand[data-empty="true"] {
  min-width: 30px;
  padding-left: 4px;
  padding-right: 4px;
}

.double-integral-integrand[data-empty="false"],
.calcunator-double-integral-integrand[data-empty="false"] {
  min-width: 0;
  padding-left: 2px;
  padding-right: 2px;
}

.calcunator-double-integral-container:focus-within .calcunator-double-integral-limit,
.double-integral-container:focus-within .double-integral-limit {
  box-shadow: inset 0 0 0 1px #cccccc;
}

.calcunator-double-integral-container:focus-within .calcunator-double-integral-integrand,
.double-integral-container:focus-within .double-integral-integrand {
  border-color: #cccccc;
}

/* Summation / product */

.calcunator-big-operator-container {
  --operator-size: 1.6em;
  --operator-width: 34px;
  --limit-size: 16px;
  --operator-height: 62px;

  position: relative;
  display: inline-flex;
  align-items: center;
  vertical-align: middle;
  white-space: nowrap;
  line-height: 1;
  height: var(--operator-height);
  min-height: var(--operator-height);
  margin: 0 2px;
  pointer-events: none;
  overflow: visible;
}

.calcunator-big-operator-stack {
  position: relative;
  display: inline-block;
  width: var(--operator-width);
  min-width: var(--operator-width);
  height: var(--operator-height);
  min-height: var(--operator-height);
  line-height: 1;
  pointer-events: none;
}

.calcunator-big-operator-symbol {
  position: absolute;
  left: calc(var(--operator-width) / 2);
  top: 50%;
  display: inline-block;
  font-size: var(--operator-size);
  line-height: 1;
  transform: translate(-50%, -50%);
  pointer-events: none;
  user-select: none;
}

.calcunator-big-operator-limit {
  position: absolute;
  left: calc((var(--operator-width) - var(--limit-size)) / 2);
  z-index: 3;
  display: inline-block;
  width: var(--limit-size);
  min-width: var(--limit-size);
  height: var(--limit-size);
  min-height: var(--limit-size);
  padding: 0;
  border: 0;
  box-sizing: border-box;
  text-align: center;
  white-space: nowrap;
  font-size: 0.72em;
  line-height: var(--limit-size);
  outline: none;
  pointer-events: auto;
  background: transparent;
}

.calcunator-big-operator-upper {
  top: 0;
}

.calcunator-big-operator-lower {
  bottom: 0;
}

.calcunator-big-operator-limit[data-empty="true"] {
  box-shadow: inset 0 0 0 1px #cccccc;
}

.calcunator-big-operator-limit[data-empty="false"] {
  width: auto;
  min-width: var(--limit-size);
  padding-left: 2px;
  padding-right: 2px;
}

.calcunator-big-operator-expression {
  display: inline-block;
  min-width: 30px;
  min-height: 1em;
  padding: 0 4px;
  margin-left: 6px;
  border: 1px solid transparent;
  box-sizing: border-box;
  text-align: center;
  white-space: nowrap;
  line-height: 1.25;
  outline: none;
  pointer-events: auto;
  vertical-align: middle;
  background: transparent;
}

.calcunator-big-operator-expression[data-empty="false"] {
  min-width: 0;
  padding-left: 2px;
  padding-right: 2px;
}

.calcunator-big-operator-container:focus-within .calcunator-big-operator-limit {
  box-shadow: inset 0 0 0 1px #cccccc;
}

.calcunator-big-operator-container:focus-within .calcunator-big-operator-expression {
  border-color: #cccccc;
}

/* Nested scaling */

.calcunator-derivative-container .calcunator-derivative-container,
.calcunator-limit-container .calcunator-limit-container,
.calcunator-integral-container .calcunator-integral-container,
.calcunator-def-integral-container .calcunator-def-integral-container,
.calcunator-double-integral-container .calcunator-double-integral-container,
.calcunator-big-operator-container .calcunator-big-operator-container {
  font-size: 0.7em;
}

.calcunator-derivative-container .fraction,
.calcunator-limit-container .fraction,
.calcunator-integral-container .fraction,
.calcunator-def-integral-container .fraction,
.calcunator-double-integral-container .fraction,
.calcunator-big-operator-container .fraction,
.calcunator-derivative-container .calc-fraction,
.calcunator-limit-container .calc-fraction,
.calcunator-integral-container .calc-fraction,
.calcunator-def-integral-container .calc-fraction,
.calcunator-double-integral-container .calc-fraction,
.calcunator-big-operator-container .calc-fraction {
  vertical-align: middle;
}