.escuela_math_cross3d-sandbox {
  --escuela_math_cross3d-ruby: #9B111E;
  --escuela_math_cross3d-ruby-soft: #E03A50;
  --escuela_math_cross3d-blue: #0000FF;
  --escuela_math_cross3d-blue-soft: #3D3DFF;
  --escuela_math_cross3d-gold: #BDA838;
  --escuela_math_cross3d-gold-dim: rgba(189, 168, 56, 0.55);
  --escuela_math_cross3d-gold-faint: rgba(189, 168, 56, 0.16);
  --escuela_math_cross3d-ink: #04050e;
  --escuela_math_cross3d-panel: rgba(10, 12, 29, 0.92);
  --escuela_math_cross3d-panel-deep: rgba(6, 7, 18, 0.94);
  --escuela_math_cross3d-line: rgba(122, 132, 255, 0.16);
  --escuela_math_cross3d-grad: linear-gradient(135deg, #9B111E 0%, #6A0D8F 52%, #0000FF 100%);
  --escuela_math_cross3d-grad-soft: linear-gradient(135deg, rgba(155, 17, 30, 0.22) 0%, rgba(0, 0, 255, 0.22) 100%);
  --escuela_math_cross3d-font: "Merriweather", "SF Pro Display", Roboto, "Helvetica Neue", Arial, sans-serif;
  --escuela_math_cross3d-font-mono: "Merriweather", "SF Mono", Consolas, "Roboto Mono", monospace;
  --escuela_math_cross3d-radius: 16px;


  position: relative;
  min-height: 100vh;
  padding: 34px clamp(14px, 3vw, 42px) 46px;
  font-family: var(--escuela_math_cross3d-font);
  color: #E8EAF6;
  background:
    radial-gradient(1200px 700px at 12% -6%, rgba(155, 17, 30, 0.20), transparent 60%),
    radial-gradient(1100px 800px at 88% 108%, rgba(0, 0, 255, 0.22), transparent 62%),
    radial-gradient(900px 500px at 55% 42%, rgba(88, 40, 168, 0.10), transparent 65%),
    linear-gradient(180deg, #04050e 0%, #060818 55%, #04050e 100%);
  overflow-x: hidden;
}

.escuela_math_cross3d-sandbox *,
.escuela_math_cross3d-sandbox *::before,
.escuela_math_cross3d-sandbox *::after { box-sizing: border-box; }

body { margin: 0; background: #04050e; } /* gentle reset for standalone use */

.escuela_math_cross3d-shell {
  max-width: 1460px;
  margin: 0 auto;
}

.escuela_math_cross3d-header { margin-bottom: 22px; }

.escuela_math_cross3d-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 3.5px;
  text-transform: uppercase;
  color: var(--escuela_math_cross3d-gold-dim);
  padding: 6px 14px;
  border: 1px solid var(--escuela_math_cross3d-gold-faint);
  border-radius: 999px;
  background: rgba(189, 168, 56, 0.05);
}

.escuela_math_cross3d-eyebrow::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--escuela_math_cross3d-gold);
  box-shadow: 0 0 10px rgba(189, 168, 56, 0.9);
  animation: escuela_math_cross3dPulse 2.6s ease-in-out infinite;
}

.escuela_math_cross3d-title {
  margin: 14px 0 8px;
  font-size: clamp(26px, 3.6vw, 44px);
  font-weight: 800;
  letter-spacing: 0.5px;
  line-height: 1.08;
  background: linear-gradient(92deg, #ff8f9a 0%, #9B111E 22%, #BDA838 46%, #7d7dff 72%, #0000FF 100%);
  background-size: 220% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  animation: escuela_math_cross3dTitleShift 9s ease-in-out infinite alternate;
}

.escuela_math_cross3d-subtitle {
  margin: 0;
  max-width: 760px;
  font-size: 14px;
  line-height: 1.65;
  color: rgba(232, 234, 246, 0.62);
}

.escuela_math_cross3d-subtitle b { color: var(--escuela_math_cross3d-gold); font-weight: 600; }

.escuela_math_cross3d-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 392px;
  gap: 20px;
  align-items: start;
}

.escuela_math_cross3d-viewport {
  position: relative;
  height: clamp(440px, 62vh, 660px);
  border-radius: var(--escuela_math_cross3d-radius);
  border: 1px solid transparent;
  background:
    linear-gradient(180deg, rgba(4, 5, 14, 0.96), rgba(6, 7, 20, 0.98)) padding-box,
    var(--escuela_math_cross3d-grad) border-box;
  box-shadow:
    0 24px 70px rgba(0, 0, 0, 0.55),
    0 0 42px rgba(155, 17, 30, 0.14),
    0 0 46px rgba(0, 0, 255, 0.16);
  overflow: hidden;
}

.escuela_math_cross3d-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  cursor: grab;
  touch-action: none;
  outline: none;
}

.escuela_math_cross3d-canvas--dragging { cursor: grabbing; }

.escuela_math_cross3d-hint {
  position: absolute;
  right: 14px;
  bottom: 12px;
  font-size: 11px;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  color: var(--escuela_math_cross3d-gold-dim);
  pointer-events: none;
  user-select: none;
}

.escuela_math_cross3d-chip {
  position: absolute;
  top: 14px;
  left: 14px;
  max-width: min(78%, 460px);
  padding: 9px 14px;
  font-size: 12.5px;
  line-height: 1.45;
  letter-spacing: 0.3px;
  color: var(--escuela_math_cross3d-gold);
  background: rgba(6, 7, 18, 0.82);
  border: 1px solid var(--escuela_math_cross3d-gold-faint);
  border-left: 3px solid var(--escuela_math_cross3d-gold);
  border-radius: 10px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  pointer-events: none;
  animation: escuela_math_cross3dChipIn 0.25s ease-out;
}

.escuela_math_cross3d-chip--warn {
  border-left-color: #FFB74D;
  box-shadow: 0 0 18px rgba(255, 183, 77, 0.18);
}

.escuela_math_cross3d-chip--error {
  border-left-color: #FF5A6E;
  color: #FFD9DD;
  box-shadow: 0 0 18px rgba(255, 90, 110, 0.22);
}

.escuela_math_cross3d-panel {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-height: clamp(440px, 62vh, 660px);
  overflow-y: auto;
  padding-right: 6px;
  scrollbar-width: thin;
  scrollbar-color: #9B111E #0a0c1d;
}

.escuela_math_cross3d-panel::-webkit-scrollbar { width: 8px; }
.escuela_math_cross3d-panel::-webkit-scrollbar-track { background: #0a0c1d; border-radius: 8px; }
.escuela_math_cross3d-panel::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #9B111E, #0000FF);
  border-radius: 8px;
}

.escuela_math_cross3d-card {
  border: 1px solid transparent;
  border-radius: 14px;
  background:
    linear-gradient(180deg, var(--escuela_math_cross3d-panel), var(--escuela_math_cross3d-panel-deep)) padding-box,
    var(--escuela_math_cross3d-grad-soft) border-box;
  padding: 14px 16px 16px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

.escuela_math_cross3d-card-title {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 12px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2.6px;
  text-transform: uppercase;
  color: var(--escuela_math_cross3d-gold-dim);
}

.escuela_math_cross3d-card-title::before {
  content: "";
  width: 16px;
  height: 3px;
  border-radius: 2px;
  background: var(--escuela_math_cross3d-grad);
  box-shadow: 0 0 8px rgba(155, 17, 30, 0.8);
}

.escuela_math_cross3d-shape-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 7px;
}

.escuela_math_cross3d-shape-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 9px 4px 7px;
  font-family: inherit;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: rgba(232, 234, 246, 0.72);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(122, 132, 255, 0.22);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.22s ease;
}

.escuela_math_cross3d-shape-btn svg {
  width: 24px;
  height: 24px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.escuela_math_cross3d-shape-btn:hover {
  color: #fff;
  border-color: rgba(189, 168, 56, 0.55);
  background: rgba(189, 168, 56, 0.07);
  transform: translateY(-1px);
}

.escuela_math_cross3d-shape-btn--active {
  color: #fff;
  border-color: transparent;
  background: var(--escuela_math_cross3d-grad);
  box-shadow:
    0 6px 20px rgba(155, 17, 30, 0.45),
    0 6px 24px rgba(0, 0, 255, 0.40),
    inset 0 0 14px rgba(255, 255, 255, 0.12);
}

.escuela_math_cross3d-shape-btn--active:hover { background: var(--escuela_math_cross3d-grad); }

.escuela_math_cross3d-field { margin-top: 12px; }
.escuela_math_cross3d-field:first-child { margin-top: 0; }

.escuela_math_cross3d-field-label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 7px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 1.1px;
  text-transform: uppercase;
  color: var(--escuela_math_cross3d-gold);
}

.escuela_math_cross3d-field-label b {
  font-family: var(--escuela_math_cross3d-font-mono);
  font-weight: 700;
  font-size: 12px;
  color: var(--escuela_math_cross3d-gold);
  text-shadow: 0 0 12px rgba(189, 168, 56, 0.5);
}

.escuela_math_cross3d-seg {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
}

.escuela_math_cross3d-seg-btn {
  padding: 8px 6px;
  font-family: inherit;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.4px;
  color: rgba(232, 234, 246, 0.68);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(122, 132, 255, 0.22);
  border-radius: 9px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.escuela_math_cross3d-seg-btn:hover { color: #fff; border-color: rgba(189, 168, 56, 0.5); }

.escuela_math_cross3d-seg-btn--active {
  color: #fff;
  border-color: transparent;
  background: var(--escuela_math_cross3d-grad);
  box-shadow: 0 4px 16px rgba(0, 0, 255, 0.35);
}

.escuela_math_cross3d-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 22px;
  background: transparent;
  cursor: pointer;
}

.escuela_math_cross3d-slider::-webkit-slider-runnable-track {
  height: 6px;
  border-radius: 3px;
  background: linear-gradient(90deg, #9B111E, #6A0D8F 55%, #0000FF);
  box-shadow: inset 0 0 6px rgba(0, 0, 0, 0.6), 0 0 10px rgba(0, 0, 255, 0.25);
}

.escuela_math_cross3d-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 17px;
  height: 17px;
  margin-top: -5.5px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 32%, #FFE9A6, #BDA838 62%, #7a6a1e);
  border: 2px solid #04050e;
  box-shadow: 0 0 12px rgba(189, 168, 56, 0.75);
}

.escuela_math_cross3d-slider::-moz-range-track {
  height: 6px;
  border-radius: 3px;
  background: linear-gradient(90deg, #9B111E, #6A0D8F 55%, #0000FF);
}

.escuela_math_cross3d-slider::-moz-range-thumb {
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 32%, #FFE9A6, #BDA838 62%, #7a6a1e);
  border: 2px solid #04050e;
  box-shadow: 0 0 12px rgba(189, 168, 56, 0.75);
}

.escuela_math_cross3d-slider:focus-visible { outline: 2px solid var(--escuela_math_cross3d-gold); outline-offset: 4px; border-radius: 6px; }

.escuela_math_cross3d-input {
  width: 100%;
  padding: 8px 10px;
  font-family: var(--escuela_math_cross3d-font-mono);
  font-size: 13px;
  color: var(--escuela_math_cross3d-gold);
  text-shadow: 0 0 8px rgba(189, 168, 56, 0.35);
  background: rgba(8, 10, 24, 0.85);
  border: 1px solid rgba(189, 168, 56, 0.32);
  border-radius: 9px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.escuela_math_cross3d-input::-webkit-outer-spin-button,
.escuela_math_cross3d-input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.escuela_math_cross3d-input[type="number"] { -moz-appearance: textfield; appearance: textfield; }

.escuela_math_cross3d-input:focus {
  outline: none;
  border-color: var(--escuela_math_cross3d-gold);
  box-shadow: 0 0 0 1px rgba(189, 168, 56, 0.35), 0 0 16px rgba(189, 168, 56, 0.28);
}

.escuela_math_cross3d-input--coord { padding: 7px 7px; text-align: center; }

.escuela_math_cross3d-edge-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(86px, 1fr));
  gap: 7px;
}

.escuela_math_cross3d-edge-item { display: flex; flex-direction: column; gap: 4px; }

.escuela_math_cross3d-edge-label {
  font-family: var(--escuela_math_cross3d-font-mono);
  font-size: 11px;
  color: var(--escuela_math_cross3d-gold-dim);
}

.escuela_math_cross3d-points {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 12px;
}

.escuela_math_cross3d-point-row {
  display: grid;
  grid-template-columns: 26px 1fr 1fr 1fr 66px;
  gap: 6px;
  align-items: center;
}

.escuela_math_cross3d-point-name {
  font-family: var(--escuela_math_cross3d-font-mono);
  font-size: 12.5px;
  font-weight: 700;
  color: var(--escuela_math_cross3d-gold);
  text-shadow: 0 0 10px rgba(189, 168, 56, 0.55);
}

.escuela_math_cross3d-point-flag {
  font-size: 10.5px;
  letter-spacing: 0.4px;
  text-align: center;
  color: var(--escuela_math_cross3d-gold-dim);
  padding: 5px 2px;
  border-radius: 7px;
  border: 1px dashed rgba(189, 168, 56, 0.25);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.escuela_math_cross3d-point-flag--in {
  color: var(--escuela_math_cross3d-gold);
  border: 1px solid rgba(189, 168, 56, 0.55);
  background: rgba(189, 168, 56, 0.10);
}

.escuela_math_cross3d-point-flag--out {
  color: rgba(255, 138, 150, 0.95);
  border: 1px solid rgba(255, 90, 110, 0.45);
  background: rgba(155, 17, 30, 0.14);
}

.escuela_math_cross3d-btn-row { display: flex; gap: 7px; flex-wrap: wrap; }

.escuela_math_cross3d-btn {
  flex: 1 1 auto;
  padding: 8px 12px;
  font-family: inherit;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  color: var(--escuela_math_cross3d-gold);
  background:
    linear-gradient(180deg, rgba(12, 14, 32, 0.9), rgba(8, 9, 22, 0.9)) padding-box,
    var(--escuela_math_cross3d-grad) border-box;
  border: 1px solid transparent;
  border-radius: 9px;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.escuela_math_cross3d-btn:hover {
  color: #FFE9A6;
  box-shadow: 0 0 20px rgba(155, 17, 30, 0.35), 0 0 24px rgba(0, 0, 255, 0.30);
  transform: translateY(-1px);
}

.escuela_math_cross3d-btn:active { transform: translateY(0); }
.escuela_math_cross3d-btn:focus-visible { outline: 2px solid var(--escuela_math_cross3d-gold); outline-offset: 3px; }

.escuela_math_cross3d-switch-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 1.1px;
  text-transform: uppercase;
  color: var(--escuela_math_cross3d-gold);
  cursor: pointer;
  user-select: none;
}

.escuela_math_cross3d-switch-row input { position: absolute; opacity: 0; pointer-events: none; }

.escuela_math_cross3d-switch {
  position: relative;
  width: 40px;
  height: 20px;
  border-radius: 999px;
  background: rgba(122, 132, 255, 0.18);
  border: 1px solid rgba(122, 132, 255, 0.35);
  transition: all 0.25s ease;
  flex: 0 0 auto;
}

.escuela_math_cross3d-switch::after {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #8f93c9;
  transition: all 0.25s ease;
}

.escuela_math_cross3d-switch-row input:checked + .escuela_math_cross3d-switch {
  background: var(--escuela_math_cross3d-grad);
  border-color: transparent;
  box-shadow: 0 0 14px rgba(0, 0, 255, 0.45);
}

.escuela_math_cross3d-switch-row input:checked + .escuela_math_cross3d-switch::after {
  left: 22px;
  background: #fff;
  box-shadow: 0 0 8px rgba(255, 255, 255, 0.9);
}

.escuela_math_cross3d-switch-row input:focus-visible + .escuela_math_cross3d-switch {
  outline: 2px solid var(--escuela_math_cross3d-gold);
  outline-offset: 3px;
}

.escuela_math_cross3d-equation {
  margin-bottom: 11px;
  padding: 10px 12px;
  font-family: var(--escuela_math_cross3d-font-mono);
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--escuela_math_cross3d-gold);
  text-shadow: 0 0 10px rgba(189, 168, 56, 0.35);
  background: rgba(189, 168, 56, 0.06);
  border: 1px solid rgba(189, 168, 56, 0.22);
  border-left: 3px solid var(--escuela_math_cross3d-gold);
  border-radius: 9px;
  word-break: break-word;
}

.escuela_math_cross3d-readouts {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.escuela_math_cross3d-readouts > div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
}

.escuela_math_cross3d-readouts dt {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 1.4px;
  text-transform: uppercase;
  color: var(--escuela_math_cross3d-gold-dim);
  white-space: nowrap;
}

.escuela_math_cross3d-readouts dd {
  margin: 0;
  font-family: var(--escuela_math_cross3d-font-mono);
  font-size: 13px;
  color: var(--escuela_math_cross3d-gold);
  text-align: right;
  text-shadow: 0 0 10px rgba(189, 168, 56, 0.35);
  word-break: break-word;
}

@keyframes escuela_math_cross3dPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.82); }
}

@keyframes escuela_math_cross3dTitleShift {
  from { background-position: 0% 50%; }
  to { background-position: 100% 50%; }
}

@keyframes escuela_math_cross3dChipIn {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 1120px) {
  .escuela_math_cross3d-layout { grid-template-columns: 1fr; }
  .escuela_math_cross3d-panel { max-height: none; overflow-y: visible; }
  .escuela_math_cross3d-viewport { height: clamp(380px, 58vh, 560px); }
}

@media (max-width: 640px) {
  .escuela_math_cross3d-sandbox { padding: 22px 12px 34px; }
  .escuela_math_cross3d-shape-grid { grid-template-columns: repeat(3, 1fr); }
  .escuela_math_cross3d-point-row { grid-template-columns: 24px 1fr 1fr 1fr; }
  .escuela_math_cross3d-point-flag { grid-column: 2 / -1; }
  .escuela_math_cross3d-hint { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .escuela_math_cross3d-sandbox *,
  .escuela_math_cross3d-sandbox *::before,
  .escuela_math_cross3d-sandbox *::after {
    animation-duration: 0.001s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001s !important;
  }
}