/*
  Visual angle calculator (javascripts/visual-angle.js).

  Usage on a page:
    <div class="va-calc" data-setup="mr11">
      <p>Fallback text shown without JavaScript.</p>
    </div>

  Colours come from the theme (Material variables and the --hl-* list
  tokens in extra.css), so light and dark mode follow automatically.
  The drawing is made at the figure's real width (1 SVG unit = 1 CSS
  pixel), so the SVG font sizes below are real pixel sizes.
*/

.md-typeset .va-calc {
  --va-accent: var(--hl-marker);
  --va-line: var(--md-default-fg-color--lightest);
  --va-muted: var(--md-default-fg-color--light);
  --va-panel: color-mix(in srgb, var(--va-accent) 6%, var(--md-default-bg-color));
  --va-screen: color-mix(in srgb, var(--md-default-fg-color) 4%, var(--md-default-bg-color));
  margin: 1.4em 0;
  border: 1px solid var(--va-line);
  border-radius: 10px;
  box-shadow: 0 2px 10px rgb(0 0 0 / 5%);
  background: var(--md-default-bg-color);
  overflow: hidden;
  font-variant-numeric: tabular-nums;
}

.md-typeset .va-calc > p:only-child {
  margin: 0;
  padding: .8rem 1rem;
  color: var(--va-muted);
}

/* Shared field parts */

.md-typeset .va-field,
.md-typeset .va-preset,
.md-typeset .va-ecc {
  display: flex;
  flex-direction: column;
  gap: .25rem;
  margin: 0;
  min-width: 0;
}

.md-typeset .va-field__label {
  font-size: .68rem;
  line-height: 1.3;
  color: var(--va-muted);
}

.md-typeset .va-field__box {
  display: flex;
  align-items: center;
  border: 1px solid var(--va-line);
  border-radius: 6px;
  background: var(--md-default-bg-color);
  transition: border-color .15s ease;
}

.md-typeset .va-field__box:focus-within {
  border-color: var(--va-accent);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--va-accent) 20%, transparent);
}

.md-typeset .va-field__box input {
  flex: 1 1 0;
  min-width: 0;
  font: inherit;
  font-size: .8rem;
  font-variant-numeric: tabular-nums;
  color: var(--md-default-fg-color);
  background: transparent;
  border: 0;
  padding: .4rem .55rem;
  outline: none;
}

.md-typeset .va-field__times {
  flex: 0 0 auto;
  font-size: .72rem;
  color: var(--va-muted);
}

.md-typeset .va-field__unit {
  flex: 0 0 auto;
  padding: 0 .6rem 0 .3rem;
  font-size: .7rem;
  color: var(--va-muted);
}

/* Set-up panel */

.md-typeset .va-calc__setup {
  padding: 1rem 1.1rem 1.1rem;
  background: var(--va-panel);
  border-bottom: 1px solid var(--va-line);
}

.md-typeset .va-calc__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: .5rem 1.2rem;
  margin-bottom: .9rem;
}

.md-typeset .va-calc__note {
  flex: 1 1 16rem;
  max-width: 34rem;
  margin: 0;
  font-size: .68rem;
  line-height: 1.45;
  color: var(--va-muted);
}

.md-typeset .va-preset select {
  font: inherit;
  font-size: .78rem;
  font-weight: 600;
  color: var(--hl-badge-fg);
  background: var(--hl-badge-bg);
  border: 0;
  border-radius: 999px;
  padding: .35rem 2rem .35rem .85rem;
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, currentColor 50%),
    linear-gradient(135deg, currentColor 50%, transparent 50%);
  background-position: calc(100% - 1rem) 55%, calc(100% - .7rem) 55%;
  background-size: .3rem .3rem;
  background-repeat: no-repeat;
  cursor: pointer;
}

.md-typeset .va-preset select:focus-visible {
  outline: 2px solid var(--md-accent-fg-color);
  outline-offset: 2px;
}

.md-typeset .va-calc__fields {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1.15fr) minmax(0, .8fr);
  gap: .7rem .9rem;
}

/* Converter */

.md-typeset .va-calc__convert {
  padding: 1.1rem 1.1rem 1.2rem;
}

.md-typeset .va-calc__lead {
  margin: 0 0 .8rem;
  font-size: .72rem;
  line-height: 1.45;
  color: var(--va-muted);
}

.md-typeset .va-equation {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: start;
  gap: 0 .7rem;
}

.md-typeset .va-eq {
  display: flex;
  flex-direction: column;
  gap: .25rem;
  margin: 0;
  min-width: 0;
}

.md-typeset .va-eq input {
  width: 100%;
  font: inherit;
  font-size: 1.35rem;
  font-weight: 600;
  line-height: 1.25;
  font-variant-numeric: tabular-nums;
  color: var(--md-default-fg-color);
  background: transparent;
  border: 0;
  border-bottom: 2px solid var(--va-line);
  border-radius: 0;
  padding: .1rem .1rem .15rem;
  outline: none;
  transition: border-color .15s ease;
}

.md-typeset .va-eq input:focus {
  border-bottom-color: var(--va-accent);
}

.md-typeset .va-eq span {
  font-size: .68rem;
  color: var(--va-muted);
}

.md-typeset .va-equation__sign {
  padding-top: .2rem;
  font-size: 1.2rem;
  line-height: 1.25;
  color: var(--va-muted);
}

.md-typeset .va-ecc {
  max-width: 24rem;
  margin: 1rem 0 0;
}

/* Drawing and results */

.md-typeset .va-views {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(15rem, 1fr);
  gap: 1rem 1.6rem;
  align-items: start;
  margin: 1.3rem 0 0;
}

.md-typeset .va-view {
  margin: 0;
  width: 100%;
  min-width: 0;
}

.md-typeset .va-view figcaption p {
  margin: 0 0 .5rem;
}

.md-typeset .va-view figcaption p:last-child {
  margin-bottom: 0;
}

.md-typeset .va-symbols {
  display: grid;
  gap: .15rem;
}

.md-typeset .va-symbols span {
  display: grid;
  grid-template-columns: 1.1rem minmax(0, 1fr);
}

.md-typeset .va-symbols i {
  font-weight: 600;
  color: var(--md-default-fg-color);
}

.md-typeset .va-view figcaption {
  margin: .6rem 0 0;
  max-width: none;
  font-size: .68rem;
  font-style: normal;
  line-height: 1.45;
  color: var(--va-muted);
  text-align: left;
}

.md-typeset .va-front {
  display: block;
  max-width: 100%;
  height: auto;
  touch-action: none;
  user-select: none;
  font-family: inherit;
  font-variant-numeric: tabular-nums;
}

.va-front text {
  paint-order: stroke;
  stroke-linejoin: round;
  stroke-width: 4px;
  stroke: var(--md-default-bg-color);
}

.va-front__screen { fill: var(--va-screen); stroke: var(--md-default-fg-color--light); stroke-width: 1.5; }
.va-front__axis   { stroke: var(--md-default-fg-color--lightest); stroke-width: 1; }
.va-front__ring   { fill: none; stroke: var(--md-default-fg-color--lighter); stroke-width: 1; stroke-dasharray: 2 3; }
.va-front .va-front__ringlabel {
  font-size: 11px;
  fill: var(--md-default-fg-color--light);
  stroke: var(--va-screen);
}
.va-front__fix    { fill: var(--md-default-fg-color); }
.va-front__ecc    { stroke: var(--va-accent); stroke-width: 1.5; stroke-dasharray: 4 3; }
.va-front__stim   {
  fill: color-mix(in srgb, var(--va-accent) 22%, transparent);
  stroke: var(--va-accent);
  stroke-width: 1.5;
  cursor: grab;
}
.va-front__stim:focus { outline: none; }
.va-front__stim:focus-visible { stroke: var(--md-accent-fg-color); stroke-width: 2.5; }
.va-front__centre { fill: var(--va-accent); }
.va-front__reach  { fill: none; stroke: var(--va-accent); stroke-width: 1.2; stroke-opacity: .5; }
.va-front__reach--centre { stroke-opacity: .35; stroke-dasharray: 5 3; }
.va-front__handle { cursor: ew-resize; }
.va-front__hit    { fill: transparent; }
.va-front__knob   { fill: var(--md-default-bg-color); stroke: var(--va-accent); stroke-width: 2; }
.va-front .va-front__label {
  font-size: 12px;
  font-weight: 600;
  fill: var(--va-accent);
  stroke: var(--va-screen);
}
.md-typeset .va-calc--dragging .va-front__stim { cursor: grabbing; }

.va-proj          { stroke: var(--md-default-fg-color--lighter); stroke-width: 1; stroke-dasharray: 1 3; stroke-linecap: round; }
.va-plan__screen  { stroke: var(--md-default-fg-color--light); stroke-width: 3; stroke-linecap: round; }
.va-plan__stim    { stroke: var(--va-accent); stroke-width: 5; stroke-linecap: butt; }
.va-plan__axis    { stroke: var(--md-default-fg-color--lightest); stroke-width: 1; }
.va-plan__ray     { stroke: var(--md-default-fg-color--light); stroke-width: 1.2; stroke-dasharray: 4 3; }
.va-plan__arc     { fill: none; stroke: var(--va-accent); stroke-width: 1.8; }
.va-plan__eye     { fill: var(--md-default-bg-color); stroke: var(--md-default-fg-color); stroke-width: 1.5; stroke-linejoin: round; }
.va-plan__pupil   { fill: var(--md-default-fg-color); }
.va-plan__dim     { stroke: var(--md-default-fg-color--light); stroke-width: 1; }
.va-front .va-plan__label {
  font-size: 12px;
  fill: var(--md-default-fg-color);
}
.va-front .va-plan__label--accent {
  font-weight: 600;
  fill: var(--va-accent);
}

/* Only the stimulus and its handle take pointer input in the drawing. */
.va-front > :not(g),
.va-front > g:not(.va-front__handle) > :not(.va-front__stim) {
  pointer-events: none;
}

/* Result table: degrees, mm and pixels */

.md-typeset .va-table {
  display: table;
  width: 100%;
  margin: 0;
  border-collapse: collapse;
  font-size: .72rem;
  line-height: 1.35;
  font-variant-numeric: tabular-nums;
  background: transparent;
  border: 0;
  box-shadow: none;
}

/* Undo the wiki's table stripes and sticky header (extra.css) here. */
[data-md-color-scheme] .md-typeset .va-calc .va-table.va-table :is(th, td) {
  position: static;
  background: transparent;
  border: 0;
}

.md-typeset .va-table th,
.md-typeset .va-table td {
  padding: .32rem 0 .32rem .7rem;
  border: 0;
  vertical-align: baseline;
  background: transparent;
}

.md-typeset .va-table thead th {
  padding-top: 0;
  font-size: .64rem;
  font-weight: 400;
  color: var(--va-muted);
  text-align: right;
}

.md-typeset .va-table tbody th[scope="row"] {
  padding-left: 0;
  font-weight: 400;
  color: var(--va-muted);
  text-align: left;
}

.md-typeset .va-table td {
  font-weight: 600;
  color: var(--md-default-fg-color);
  text-align: right;
  white-space: nowrap;
}

[data-md-color-scheme] .md-typeset .va-calc .va-table.va-table tbody tr + tr > :is(th, td) {
  border-top: 1px solid var(--va-line);
}

.md-typeset .va-table__group th {
  padding: .9rem 0 .25rem;
  font-size: .68rem;
  font-weight: 700;
  color: var(--md-default-fg-color);
  text-align: left;
}

.md-typeset .va-table tbody:first-of-type .va-table__group th {
  padding-top: .35rem;
}

.md-typeset .va-table__swatch {
  display: inline-block;
  width: .9rem;
  margin-right: .4rem;
  vertical-align: middle;
  border-top: 2px solid color-mix(in srgb, var(--va-accent) 60%, transparent);
}

.md-typeset .va-table__swatch--centre {
  border-top-style: dashed;
  border-top-color: color-mix(in srgb, var(--va-accent) 45%, transparent);
}

.md-typeset .va-table__note {
  margin: .7rem 0 0;
  font-size: .64rem;
  line-height: 1.45;
  color: var(--va-muted);
}

.md-typeset .va-calc__warn {
  margin: .6rem 0 0;
  font-size: .72rem;
  line-height: 1.45;
  color: var(--md-default-fg-color);
  border-left: 3px solid var(--va-accent);
  padding-left: .55rem;
}

@media screen and (max-width: 59.9375em) {
  .md-typeset .va-calc__fields {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
  .md-typeset .va-views {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media screen and (max-width: 29.9375em) {
  .md-typeset .va-calc__setup,
  .md-typeset .va-calc__convert {
    padding-left: .8rem;
    padding-right: .8rem;
  }
  .md-typeset .va-calc__fields {
    grid-template-columns: minmax(0, 1fr);
  }
  .md-typeset .va-equation {
    gap: 0 .35rem;
  }
  .md-typeset .va-eq input {
    font-size: 1.05rem;
  }
  .md-typeset .va-equation__sign {
    font-size: .95rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .md-typeset .va-calc * {
    transition: none !important;
  }
}

@media print {
  .md-typeset .va-calc {
    box-shadow: none;
  }
}