/* "Invisible plate" (lecture 11): same palette as refraction_labs.css. */
.invisible-plate {
  box-sizing: border-box;
  width: min(1760px, 100%);
  margin: 0.2rem auto;
  padding: 0.45rem 0.7rem 0.35rem;
  border: 1px solid rgba(126, 189, 224, 0.36);
  border-radius: 0.35rem;
  background: #08131e;
  color: #edf6fc;
  font: 29px/1.25 system-ui, sans-serif;
  container-type: inline-size;
}

.invisible-plate * {
  box-sizing: border-box;
}

.invisible-plate__bar,
.invisible-plate__controls,
.invisible-plate__replica,
.invisible-plate__formulas {
  font-size: clamp(14px, 1.55cqi, 26px);
}

.invisible-plate__bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.1rem 0.2rem 0.4rem;
}

.invisible-plate__steps,
.invisible-plate__actions,
.invisible-plate__prep {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.invisible-plate button {
  padding: 0.2em 0.65em;
  border: 1px solid rgba(126, 189, 224, 0.55);
  border-radius: 0.3rem;
  background: #10263a;
  color: #e7f1f8;
  font: inherit;
  cursor: pointer;
}

.invisible-plate button[aria-pressed="true"] {
  background: #1d4561;
  border-color: #73d6eb;
}

.invisible-plate__controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.4rem 1.4rem;
  padding: 0 0.25rem 0.35rem;
}

.invisible-plate__controls label {
  position: relative;
  display: block;
  color: #dcecf6;
}

.invisible-plate__controls label > span:not(.invisible-plate__name):not(.invisible-plate__ticks) {
  float: right;
  color: #ffd386;
  font-variant-numeric: tabular-nums;
}

.invisible-plate input[type="range"] {
  display: block;
  width: 100%;
  margin: 0.3rem 0 0;
  accent-color: #73d6eb;
}

.invisible-plate__ticks {
  position: relative;
  display: block;
  height: 1.2em;
  font-size: 0.7em;
  color: #a9bdca;
}

.invisible-plate__ticks span {
  position: absolute;
  top: 0;
  transform: translateX(-50%);
  white-space: nowrap;
}

.invisible-plate__ticks span:first-child,
.invisible-plate__ticks span.is-start {
  transform: none;
}

.invisible-plate__prep {
  align-items: center;
}

.invisible-plate svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
  font: 20px/1.2 system-ui, sans-serif;
}

.invisible-plate svg text {
  fill: #e5eff7;
}

.invisible-plate svg .invisible-plate__muted,
.invisible-plate svg .invisible-plate__note {
  fill: #a9bdca;
}

.invisible-plate svg .invisible-plate__note {
  font-size: 17px;
}

.invisible-plate svg .invisible-plate__big {
  font-size: 30px;
  font-weight: 700;
  fill: #ffd386;
}

.invisible-plate svg [data-layer],
.invisible-plate svg [data-inset],
.invisible-plate svg [data-dials],
.invisible-plate svg [data-sum],
.invisible-plate svg [data-bars],
.invisible-plate svg [data-brightness],
.invisible-plate svg [data-vac-axes] {
  transition: opacity 0.6s ease;
}

.invisible-plate.is-static svg * {
  transition: none !important;
}

.invisible-plate .is-hidden {
  opacity: 0;
  pointer-events: none;
}

.invisible-plate label.is-hidden,
.invisible-plate div.is-hidden,
.invisible-plate button.is-hidden {
  display: none;
}

.invisible-plate svg .is-lit {
  filter: drop-shadow(0 0 6px #ffd386);
}

.invisible-plate__device {
  fill: #0d2232;
  stroke: rgba(221, 237, 248, 0.6);
  stroke-width: 2.5;
}

.invisible-plate svg .invisible-plate__device-label {
  font-size: 28px;
  font-weight: 600;
}

.invisible-plate__pol-h,
.invisible-plate__pol-v {
  stroke-width: 5;
  stroke-linecap: round;
}

.invisible-plate__pol-h {
  stroke: #6ee0ec;
}

.invisible-plate__pol-v {
  stroke: #b8a2ff;
}

.invisible-plate__beam {
  stroke: rgba(221, 237, 248, 0.55);
  stroke-width: 3;
}

.invisible-plate__plate {
  fill: rgba(110, 224, 236, 0.16);
  stroke: rgba(110, 224, 236, 0.75);
  stroke-width: 2;
}

.invisible-plate__screen {
  stroke: #4e606d;
  stroke-width: 2;
}

.invisible-plate__medium {
  fill: #ffcb72;
  transition: opacity 0.4s ease;
}

.invisible-plate__axis {
  stroke: rgba(221, 237, 248, 0.46);
  stroke-width: 2;
}

.invisible-plate__vac-axis {
  stroke: #b8a2ff;
  stroke-width: 1.6;
  stroke-dasharray: 3 5;
  opacity: 0.7;
}

.invisible-plate__eigen {
  stroke-width: 2;
  stroke-dasharray: 9 6;
}

.invisible-plate__eigen--1 {
  stroke: #6ee0ec;
}

.invisible-plate__eigen--2 {
  stroke: #ffd386;
}

.invisible-plate svg .invisible-plate__eigen-label--1 {
  fill: #6ee0ec;
}

.invisible-plate svg .invisible-plate__eigen-label--2 {
  fill: #ffd386;
}

.invisible-plate__state {
  stroke: #e5eff7;
  stroke-width: 5;
  stroke-linecap: round;
}

.invisible-plate__state-head {
  fill: #e5eff7;
}

.invisible-plate__comp--1,
.invisible-plate__comp--2 {
  stroke-width: 5;
  stroke-linecap: round;
}

.invisible-plate__comp--1 {
  stroke: #6ee0ec;
}

.invisible-plate__comp-head--1 {
  fill: #6ee0ec;
}

.invisible-plate__comp--2 {
  stroke: #ffd386;
}

.invisible-plate__comp-head--2 {
  fill: #ffd386;
}

.invisible-plate__dotted {
  stroke: #a9bdca;
  stroke-width: 1.4;
  stroke-dasharray: 3 4;
}

.invisible-plate__ellipse {
  fill: none;
  stroke: #ffd386;
  stroke-width: 2.5;
  opacity: 0.7;
}

.invisible-plate__dial {
  fill: none;
  stroke: rgba(221, 237, 248, 0.35);
  stroke-width: 2;
}

.invisible-plate__locus {
  fill: none;
  stroke: rgba(255, 211, 134, 0.42);
  stroke-width: 2;
  stroke-dasharray: 7 7;
}

.invisible-plate__sum {
  stroke: #ff8f7a;
  stroke-width: 8;
  stroke-linecap: round;
  opacity: 0.85;
}

.invisible-plate__sum-head {
  fill: #ff8f7a;
}

.invisible-plate svg .invisible-plate__sum-label {
  fill: #ff8f7a;
  font-weight: 700;
}

.invisible-plate__bar-e {
  fill: #6ee0ec;
}

.invisible-plate__bar-x {
  fill: #ffd386;
}

.invisible-plate__curve {
  fill: none;
  stroke: #6ee0ec;
  stroke-width: 3;
}

.invisible-plate__marker {
  fill: #ffd386;
}

.invisible-plate__text {
  position: relative;
  min-height: 2.6em;
}

.invisible-plate.is-formula .invisible-plate__replica {
  visibility: hidden;
}

.invisible-plate__replica {
  margin: 0.1rem 0 0;
  padding: 0.2rem 0.5rem;
  color: #e7f1f8;
  text-align: center;
}

.invisible-plate__formulas {
  position: absolute;
  inset: 0;
  text-align: center;
}

.invisible-plate__formulas > div {
  position: absolute;
  inset: 0;
  overflow-x: auto;
  overflow-y: hidden;
  visibility: hidden;
}

.invisible-plate__formulas > div.is-active {
  visibility: visible;
}

.invisible-plate__hint {
  display: none;
  margin: 0 0 0.2rem;
  color: #a9bdca;
  font-size: 14px;
}

/* Applet pages on narrow screens: the scheme keeps a readable size and
   scrolls sideways inside the lab; the page itself does not scroll. */
@media (max-width: 900px) {
  body:not(.reveal-viewport) .invisible-plate__controls {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 700px) {
  body:not(.reveal-viewport) .invisible-plate {
    padding: 0.4rem 0.35rem 0.25rem;
  }
  body:not(.reveal-viewport) .invisible-plate__hint {
    display: block;
  }
  body:not(.reveal-viewport) .invisible-plate__scroll {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  body:not(.reveal-viewport) .invisible-plate__scroll svg {
    min-width: 860px;
  }
}