/* Math Workbench — styles for the wb-*.js board extensions.
 * Tokens (--ink, --line, --teal, ...) come from index.html. Controls are >=44px,
 * focus rings are visible, and nothing animates in calm mode. */

.wbx {
  display: grid;
  gap: 8px;
  padding: 10px 12px;
  background: #fff;
  border: 1px solid var(--line, #d7e0ec);
  border-radius: 12px;
  font-family: "Atkinson Hyperlegible", "Nunito", system-ui, sans-serif;
  color: var(--ink, #14223a);
}

.wbx-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.wbx-title {
  margin: 0;
  font-size: 0.8rem;
  font-weight: 900;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  color: var(--muted, #5b6b82);
}

.wbx-num,
.wbx-txt {
  min-height: 44px;
  box-sizing: border-box;
  padding: 4px 8px;
  border: 1.5px solid var(--line, #d7e0ec);
  border-radius: 8px;
  font: 800 0.9rem/1.2 inherit;
  color: var(--ink, #14223a);
  background: #fff;
}

.wbx-num {
  width: 64px;
}

.wbx-txt {
  width: 92px;
}

.wbx-num:focus-visible,
.wbx-txt:focus-visible,
.wbx-btn:focus-visible,
.wbx [tabindex]:focus-visible {
  outline: 3px solid #fbbf24;
  outline-offset: 2px;
}

.wbx-btn {
  min-height: 44px;
  min-width: 44px;
  padding: 6px 12px;
  border: 1.5px solid var(--line, #d7e0ec);
  border-radius: 10px;
  background: #fff;
  color: var(--ink, #14223a);
  font: 800 0.82rem/1.1 inherit;
  cursor: pointer;
}

.wbx-btn:hover {
  background: var(--teal-light, rgba(32, 95, 166, 0.1));
}

.wbx-btn[aria-pressed="true"],
.wbx-btn.on {
  border-color: var(--teal, #205fa6);
  background: var(--teal-light, rgba(32, 95, 166, 0.1));
  color: var(--teal-d, #17487f);
}

.wbx-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.wbx-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.wbx-live {
  margin: 0;
  min-height: 1.1em;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--muted, #5b6b82);
}

.wbx-read {
  margin: 0;
  font-size: 0.9rem;
  font-weight: 900;
}

.wbx svg {
  display: block;
  max-width: none;
}

.wbx .cell {
  cursor: pointer;
}

.wbx .cell:focus-visible {
  outline: none;
}

.wbx-cursor {
  fill: none;
  stroke: #fbbf24;
  stroke-width: 3;
  pointer-events: none;
}

body.a11y-contrast .wbx {
  border-color: #14223a;
}

@media (prefers-reduced-motion: reduce) {
  .wbx * {
    transition: none !important;
    animation: none !important;
  }
}

body.a11y-calm .wbx * {
  transition: none !important;
  animation: none !important;
}

@media print {
  .wbx-btn,
  .wbx-num,
  .wbx-txt {
    border-color: #999;
  }

  /* controls and hints are for the screen; the model and the student's entries print */
  .obj .wbx-btn,
  .obj .wbx-range,
  .obj .wbx-live,
  .obj .wbx-ftn.split + .wbx-row {
    display: none !important;
  }
}

/* ---------- grids, area model, balance ---------- */
.wbx-hundred svg {
  touch-action: none;
  cursor: pointer;
}

.wbx-dectable {
  border-collapse: separate;
  border-spacing: 4px;
}

.wbx-dectable th {
  font-size: 0.85rem;
  font-weight: 900;
  color: var(--teal-d, #17487f);
  text-align: center;
}

.wbx-balstage {
  display: grid;
  place-items: center;
}

.wbx-baltwo {
  display: grid;
  gap: 6px;
}

.wbx-hundred {
  max-width: 300px;
}

.wbx-balance {
  width: 400px;
}

.wbx-hundred svg:not(:focus) .wbx-cursor {
  display: none;
}

/* ---------- factor tree ---------- */
.wbx-ft {
  overflow: visible;
}

.wbx-ftcol {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.wbx-ftrow {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding-top: 8px;
  border-top: 2px solid var(--line, #d7e0ec);
}

.wbx-ftn {
  min-width: 44px;
  min-height: 44px;
  border-radius: 999px;
  border: 2px solid var(--teal, #205fa6);
  background: #fff;
  font: 900 1rem/1 inherit;
  color: var(--ink, #14223a);
  cursor: pointer;
}

.wbx-ftn.prime {
  background: #d1fae5;
  border-color: #2c7d6b;
}

.wbx-ftn.split {
  border-style: dashed;
}

.wbx-ftn.done {
  background: #eef3f9;
}

.wbx-ftn:focus-visible {
  outline: 3px solid #fbbf24;
  outline-offset: 2px;
}

/* ---------- ladder, fraction strip, conversions ---------- */
.wbx-ladtable {
  display: grid;
  gap: 4px;
}

.wbx-ladrow {
  display: grid;
  grid-template-columns: 54px 70px 70px;
  align-items: center;
  gap: 6px;
  font-size: 1.05rem;
  text-align: center;
}

.wbx-ladrow b {
  padding: 4px 0;
  border-top: 2px solid var(--ink, #14223a);
}

.wbx-ladd {
  text-align: right;
  font-weight: 900;
  color: var(--teal-d, #17487f);
}

.wbx-fdstage {
  overflow-x: auto;
}

.wbx-convrow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 2px 0;
  border-bottom: 1px solid var(--line-2, #e8eef6);
  font-weight: 800;
}

/* ---------- nets, composite, prism volume ---------- */
.wbx-range {
  width: 150px;
  min-height: 44px;
  accent-color: var(--teal, #205fa6);
}

.wbx-netstage,
.wbx-compstage,
.wbx-pvstage {
  overflow: visible;
  display: grid;
  place-items: center;
}

/* ---------- linked ratio set, plot and connect ---------- */
.wbx-lktable {
  border-collapse: separate;
  border-spacing: 4px;
}

.wbx-lktable th {
  padding-right: 6px;
  font-size: 0.75rem;
  font-weight: 900;
  text-align: right;
  color: var(--muted, #5b6b82);
}

.wbx-lktable .top {
  color: #205fa6;
}

.wbx-lktable .bottom {
  color: #2c7d6b;
}

.wbx-lkbody {
  display: grid;
  gap: 10px;
}

.wbx-plot svg {
  touch-action: none;
}

.wbx-plot svg:not(:focus) .wbx-cursor {
  display: none;
}

.wbx-pt {
  cursor: grab;
}

.wbx-pt:focus-visible circle {
  stroke: #fbbf24;
  stroke-width: 4;
}

.wbx-plist {
  margin: 0;
  padding-left: 18px;
  font-size: 0.82rem;
  font-weight: 700;
}

/* ---------- mean & spread panel, explain card ---------- */
.wbx-stat {
  margin-top: 8px;
}

.wbx-explain {
  position: fixed;
  z-index: 10050;
  width: 360px;
  max-width: calc(100vw - 24px);
  max-height: calc(100vh - 120px);
  overflow: auto;
  box-shadow: var(--shadow-lg, 0 18px 50px rgba(15, 23, 42, 0.18));
}

.wbx-explain-text {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.5;
}

.wbx-explain-challenge {
  margin: 0;
  padding: 8px 10px;
  border-radius: 10px;
  background: #fffaf0;
  border: 1px solid var(--cream-line, #eadfc9);
  font-weight: 800;
  line-height: 1.45;
}

.wbx-chip {
  min-height: 44px;
}

/* ---------- selection, locking, guides, Board tools panel ---------- */
.obj.msel > .obj-inner,
.obj.msel .obj-scale {
  outline: 3px dashed #7c3aed;
  outline-offset: 3px;
  border-radius: 6px;
}

.obj.locked .rs {
  display: none !important;
}

.obj.locked .obj-tools button:not(.wbx-lockbtn) {
  display: none;
}

.obj.is-trace {
  opacity: 0.35;
}

.obj.is-trace svg [data-stroke] {
  stroke-dasharray: 7 5;
}

body[data-draw="1"] .obj.is-trace {
  pointer-events: none !important;
}

.wbx-lasso {
  position: absolute;
  z-index: 40;
  border: 2px dashed #7c3aed;
  background: rgba(124, 58, 237, 0.08);
  pointer-events: none;
}

.wbx-guide {
  position: absolute;
  z-index: 39;
  pointer-events: none;
  background: #f43f5e;
}

.wbx-guide.v {
  width: 1px;
}

.wbx-guide.h {
  height: 1px;
}

.wbx-boardbtn {
  position: fixed;
  right: 92px;
  bottom: 60px;
  z-index: 9000;
  min-height: 44px;
  padding: 8px 14px;
  border: 2px solid var(--teal, #205fa6);
  border-radius: 999px;
  background: #fff;
  color: var(--teal-d, #17487f);
  font: 900 0.85rem/1 "Atkinson Hyperlegible", "Nunito", system-ui, sans-serif;
  box-shadow: var(--shadow, 0 6px 20px rgba(15, 23, 42, 0.1));
  cursor: pointer;
}

.wbx-boardbtn:focus-visible {
  outline: 3px solid #fbbf24;
  outline-offset: 2px;
}

.wbx-panel {
  position: fixed;
  right: 92px;
  bottom: 112px;
  z-index: 9001;
  width: 360px;
  max-width: calc(100vw - 100px);
  max-height: calc(100vh - 190px);
  overflow: auto;
  box-shadow: var(--shadow-lg, 0 18px 50px rgba(15, 23, 42, 0.18));
}

.wbx-panel[hidden] {
  display: none;
}

.wbx-sec > summary {
  min-height: 44px;
  display: flex;
  align-items: center;
  cursor: pointer;
  font-weight: 900;
}

.wbx-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(104px, 1fr));
  gap: 6px;
}

.wbx-stack {
  display: grid;
  gap: 8px;
}

@media (max-width: 760px) {
  .wbx-boardbtn {
    right: 70px;
    bottom: 96px;
  }

  .wbx-panel {
    left: 8px;
    right: 8px;
    width: auto;
    max-width: none;
    bottom: 148px;
  }
}

@media print {
  .wbx-boardbtn,
  .wbx-panel,
  .wbx-explain,
  .wbx-lasso,
  .wbx-guide {
    display: none !important;
  }
}

/* ---------- straightedge guide and pen palette extras ---------- */
.wbx-ruler {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 45;
  transform-origin: 0 0;
  pointer-events: none;
}

.wbx-ruler[hidden] {
  display: none;
}

.wbx-ruler-body {
  position: relative;
  height: 22px;
  margin-top: -11px;
  border: 2px solid #b45309;
  border-radius: 4px;
  background: rgba(253, 230, 138, 0.55);
}

.wbx-ruler-ticks i {
  position: absolute;
  top: 0;
  width: 1px;
  background: #92400e;
}

.wbx-ruler-end,
.wbx-ruler-grip {
  position: absolute;
  top: 0;
  width: 44px;
  height: 44px;
  margin: -22px 0 0 -22px;
  border: 2px solid #b45309;
  border-radius: 50%;
  background: #fff7e0;
  color: #92400e;
  font-weight: 900;
  cursor: grab;
  pointer-events: auto;
  touch-action: none;
}

.wbx-ruler-end.a {
  left: 0;
}

.wbx-ruler-end:focus-visible,
.wbx-ruler-grip:focus-visible {
  outline: 3px solid #fbbf24;
  outline-offset: 2px;
}

.wbx-ruler-angle {
  position: absolute;
  top: -34px;
  transform: translateX(-50%);
  padding: 1px 6px;
  border-radius: 6px;
  background: #fff;
  border: 1px solid #b45309;
  font: 900 0.75rem/1.2 "Atkinson Hyperlegible", "Nunito", system-ui, sans-serif;
  color: #92400e;
}

.wbx-colorpick {
  width: 56px;
  height: 44px;
  padding: 0;
  border: 1.5px solid var(--line, #d7e0ec);
  border-radius: 8px;
  background: #fff;
}

@media print {
  .wbx-ruler {
    display: none !important;
  }
}

/* ---------- math menu, pictures, saved pages ---------- */
.wbx-mathmenu {
  position: absolute;
  left: 0;
  top: calc(100% + 6px);
  display: grid;
  grid-template-columns: repeat(4, 44px);
  gap: 4px;
  z-index: 8;
}

.wbx-mathmenu[hidden] {
  display: none;
}

.wbx-image img {
  display: block;
  max-width: none;
  mix-blend-mode: multiply;
  pointer-events: none;
  user-select: none;
}

.wbx-image {
  padding: 4px;
  background: transparent;
  border: 1px dashed var(--line, #d7e0ec);
}

.wbx-alt {
  width: 100%;
}

@media print {
  .wbx-alt {
    display: none;
  }

  .wbx-image {
    border: 0;
  }
}

.wbx-saverow {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 6px 8px;
  align-items: center;
  padding: 6px 0;
  border-bottom: 1px solid var(--line-2, #e8eef6);
}

.wbx-saverow .wbx-btn {
  grid-column: 1 / -1;
  justify-self: start;
}

.wbx-savemeta {
  display: grid;
}

.wbx-thumb {
  width: 80px;
  height: auto;
  max-height: 60px;
  object-fit: cover;
  border: 1px solid var(--line, #d7e0ec);
  border-radius: 6px;
}