/* IED Unit 1 lesson-specific interactives */
body.immersive-lesson-page .u1-interactive {
  --u1-navy: #0b1f3a;
  --u1-blue: #0c5a91;
  --u1-blue-dark: #073f66;
  --u1-gold: #f3c95c;
  --u1-green: #17653a;
  --u1-red: #9a2f2f;
  --u1-surface: #f7fafc;
  --u1-border: #9db2c4;
  color: var(--u1-navy) !important;
  -webkit-text-fill-color: var(--u1-navy) !important;
}

body.immersive-lesson-page .u1-interactive h2,
body.immersive-lesson-page .u1-interactive h3,
body.immersive-lesson-page .u1-interactive p,
body.immersive-lesson-page .u1-interactive li,
body.immersive-lesson-page .u1-interactive label,
body.immersive-lesson-page .u1-interactive legend,
body.immersive-lesson-page .u1-interactive th,
body.immersive-lesson-page .u1-interactive td,
body.immersive-lesson-page .u1-interactive span,
body.immersive-lesson-page .u1-interactive strong {
  color: var(--u1-navy) !important;
  -webkit-text-fill-color: var(--u1-navy) !important;
  opacity: 1 !important;
}

.u1-interactive .u1-intro {
  max-width: 850px;
  margin-bottom: 1.25rem;
}

.u1-interactive .u1-workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(280px, .8fr);
  gap: 1.25rem;
  align-items: start;
}

.u1-interactive .u1-workspace.equal {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.u1-interactive .u1-panel {
  background: #fff;
  border: 2px solid var(--u1-border);
  border-radius: 16px;
  padding: 1rem;
}

.u1-interactive .u1-panel.soft {
  background: var(--u1-surface);
}

.u1-interactive .u1-panel h3 {
  margin-top: 0;
}

.u1-interactive .u1-visual {
  background: #fff;
  border: 2px solid #bfd0dc;
  border-radius: 14px;
  padding: .75rem;
  min-height: 260px;
  display: grid;
  place-items: center;
}

.u1-interactive svg {
  width: 100%;
  height: auto;
  max-height: 420px;
}

.u1-interactive fieldset {
  border: 0;
  margin: 0;
  padding: 0;
  min-width: 0;
}

.u1-interactive legend {
  font-weight: 800;
  margin-bottom: .75rem;
}

.u1-interactive .u1-option-list {
  display: grid;
  gap: .65rem;
}

.u1-interactive .u1-option {
  display: flex;
  gap: .65rem;
  align-items: flex-start;
  padding: .75rem;
  border: 2px solid #c9d5de;
  border-radius: 12px;
  background: #fff;
}

.u1-interactive .u1-option:hover {
  border-color: var(--u1-blue);
}

.u1-interactive .u1-option input {
  margin-top: .2rem;
  width: 1.1rem;
  height: 1.1rem;
  accent-color: var(--u1-blue);
  flex: 0 0 auto;
}

.u1-interactive .u1-button-row {
  display: flex;
  flex-wrap: wrap;
  gap: .65rem;
  margin-top: 1rem;
}

body.immersive-lesson-page .u1-interactive button,
body.immersive-lesson-page .u1-interactive .u1-button {
  min-height: 44px;
  border: 2px solid var(--u1-blue-dark);
  border-radius: 10px;
  padding: .65rem .95rem;
  background: var(--u1-blue);
  color: #fff !important;
  -webkit-text-fill-color: #fff !important;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

body.immersive-lesson-page .u1-interactive button * {
  color: inherit !important;
  -webkit-text-fill-color: inherit !important;
}

body.immersive-lesson-page .u1-interactive button.secondary {
  background: #fff;
  color: var(--u1-navy) !important;
  -webkit-text-fill-color: var(--u1-navy) !important;
  border-color: var(--u1-border);
}

body.immersive-lesson-page .u1-interactive button.choice-button {
  width: 100%;
  text-align: left;
  background: #fff;
  color: var(--u1-navy) !important;
  -webkit-text-fill-color: var(--u1-navy) !important;
  border-color: #aebfcc;
}

body.immersive-lesson-page .u1-interactive button.choice-button[aria-pressed="true"],
body.immersive-lesson-page .u1-interactive button.selected {
  background: #dcecf8;
  border-color: var(--u1-blue);
  color: var(--u1-navy) !important;
  -webkit-text-fill-color: var(--u1-navy) !important;
}

body.immersive-lesson-page .u1-interactive button:hover {
  filter: brightness(.94);
}

body.immersive-lesson-page .u1-interactive button:focus-visible,
body.immersive-lesson-page .u1-interactive input:focus-visible,
body.immersive-lesson-page .u1-interactive select:focus-visible,
body.immersive-lesson-page .u1-interactive textarea:focus-visible {
  outline: 4px solid #ffbf47 !important;
  outline-offset: 2px;
}

.u1-interactive .u1-feedback {
  margin-top: 1rem;
  border-left: 6px solid var(--u1-blue);
  background: #eaf4fb;
  padding: .85rem 1rem;
  border-radius: 10px;
  min-height: 3rem;
}

.u1-interactive .u1-feedback[data-state="success"] {
  border-left-color: var(--u1-green);
  background: #e6f5ec;
}

.u1-interactive .u1-feedback[data-state="error"] {
  border-left-color: var(--u1-red);
  background: #faeaea;
}

.u1-interactive .u1-feedback strong,
.u1-interactive .u1-feedback span {
  color: inherit !important;
  -webkit-text-fill-color: inherit !important;
}

.u1-interactive .u1-note {
  margin-top: .9rem;
  background: #fff8da;
  border: 2px solid #e2bf4f;
  padding: .8rem 1rem;
  border-radius: 12px;
}

.u1-interactive .u1-line-sample {
  display: inline-block;
  width: 80px;
  height: 0;
  border-top: 4px solid #0b1f3a;
  vertical-align: middle;
}

.u1-interactive .u1-line-sample.hidden {
  border-top-style: dashed;
  border-top-width: 3px;
}

.u1-interactive .u1-line-sample.center {
  width: 105px;
  border-top: 0;
  height: 3px;
  background: repeating-linear-gradient(to right, #0b1f3a 0 22px, transparent 22px 27px, #0b1f3a 27px 31px, transparent 31px 37px);
}

.u1-interactive .u1-table-wrap {
  overflow-x: auto;
}

.u1-interactive table {
  border-collapse: collapse;
  width: 100%;
  background: #fff;
}

.u1-interactive th,
.u1-interactive td {
  border: 1px solid #aebfcc;
  padding: .7rem;
  text-align: left;
  vertical-align: middle;
}

.u1-interactive th {
  background: #e8f0f5;
  font-weight: 800;
}

.u1-interactive select,
.u1-interactive input[type="number"],
.u1-interactive input[type="text"],
.u1-interactive textarea {
  width: 100%;
  min-height: 44px;
  border: 2px solid #879dac;
  border-radius: 9px;
  background: #fff;
  color: var(--u1-navy) !important;
  -webkit-text-fill-color: var(--u1-navy) !important;
  padding: .55rem .7rem;
  font: inherit;
}

.u1-interactive textarea {
  min-height: 90px;
  resize: vertical;
}

.u1-interactive input[type="range"] {
  width: 100%;
  accent-color: var(--u1-blue);
}

.u1-interactive .u1-control-stack {
  display: grid;
  gap: .85rem;
}

.u1-interactive .u1-control-stack label > span:first-child {
  display: block;
  font-weight: 800;
  margin-bottom: .35rem;
}

.u1-interactive .u1-value {
  display: inline-block;
  min-width: 3ch;
  font-weight: 900;
}

.u1-interactive .u1-candidate-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .8rem;
}

.u1-interactive .u1-candidate-grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.u1-interactive .u1-candidate {
  border: 2px solid #aebfcc;
  border-radius: 12px;
  background: #fff;
  padding: .6rem;
  min-width: 0;
}

.u1-interactive .u1-candidate button {
  margin-top: .5rem;
}

.u1-interactive .u1-sort-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: .6rem;
}

.u1-interactive .u1-sort-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: .7rem;
  align-items: center;
  background: #fff;
  border: 2px solid #aebfcc;
  border-radius: 12px;
  padding: .7rem;
}

.u1-interactive .u1-sort-controls {
  display: flex;
  gap: .35rem;
}

body.immersive-lesson-page .u1-interactive .u1-sort-controls button {
  min-width: 44px;
  padding: .45rem;
}

.u1-interactive .u1-chain {
  display: flex;
  align-items: stretch;
  flex-wrap: wrap;
  gap: .55rem;
  margin-top: 1rem;
}

.u1-interactive .u1-chain-node {
  flex: 1 1 145px;
  border: 2px solid #8da6b8;
  background: #fff;
  border-radius: 12px;
  padding: .75rem;
  text-align: center;
  font-weight: 750;
}

.u1-interactive .u1-chain-arrow {
  display: grid;
  place-items: center;
  font-weight: 900;
  font-size: 1.4rem;
}

.u1-interactive .u1-metric-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .75rem;
  margin: .9rem 0;
}

.u1-interactive .u1-metric {
  background: #eef5f9;
  border: 2px solid #b3c5d1;
  border-radius: 12px;
  padding: .75rem;
  text-align: center;
}

.u1-interactive .u1-metric strong {
  display: block;
  font-size: 1.35rem;
}

.u1-interactive .u1-hotspot {
  cursor: pointer;
  transition: opacity .2s ease, stroke-width .2s ease;
}

.u1-interactive .u1-hotspot[aria-pressed="true"] {
  stroke: #b22424 !important;
  stroke-width: 6 !important;
  opacity: 1 !important;
}

.u1-interactive .u1-center-target {
  cursor: crosshair;
  touch-action: manipulation;
}

.u1-interactive .u1-key {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem 1rem;
  margin-top: .75rem;
  font-size: .95rem;
}

.u1-interactive .u1-key span {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
}

.u1-interactive .u1-swatch {
  width: 22px;
  height: 22px;
  border: 2px solid #526a7c;
  border-radius: 4px;
}

.u1-interactive .u1-swatch.light { background: #eef3f6; }
.u1-interactive .u1-swatch.medium { background: #9eb1bd; }
.u1-interactive .u1-swatch.dark { background: #465c6b; }

@media (max-width: 850px) {
  .u1-interactive .u1-workspace,
  .u1-interactive .u1-workspace.equal {
    grid-template-columns: 1fr;
  }
  .u1-interactive .u1-candidate-grid {
    grid-template-columns: 1fr;
  }
  .u1-interactive .u1-candidate-grid.two {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .u1-interactive .u1-panel,
  .u1-interactive .u1-visual {
    padding: .7rem;
  }
  .u1-interactive .u1-metric-grid {
    grid-template-columns: 1fr;
  }
  .u1-interactive .u1-sort-item {
    grid-template-columns: 1fr;
  }
  .u1-interactive .u1-sort-controls {
    justify-content: flex-end;
  }
  .u1-interactive .u1-chain-arrow {
    flex-basis: 100%;
    transform: rotate(90deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .u1-interactive *,
  .u1-interactive *::before,
  .u1-interactive *::after {
    scroll-behavior: auto !important;
    transition: none !important;
    animation: none !important;
  }
}