:root {
  --bg: #f8fafc;
  --ink: #172033;
  --muted: #5f6776;
  --line: #d7dce8;
  --field: #fafbff;
  --primary: #7c3aed;
  --primary-dark: #6d28d9;
  --teal: #0f766e;
  --danger: #b42318;
  --panel: #ffffff;
  --gold: #faa634;
  --sky: #2563eb;
  --yellow: #facc15;
  --green: #22c55e;
  --orange: #f97316;
  --red: #ef4444;
  --shadow: 0 16px 34px rgba(64, 64, 65, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
}

body.splash-open {
  overflow: hidden;
}

.top-bar {
  height: 10px;
  background: linear-gradient(90deg, var(--primary) 0 28%, #a855f7 28% 46%, var(--orange) 46% 58%, var(--red) 58% 70%, var(--sky) 70% 84%, var(--green) 84% 94%, var(--yellow) 94% 100%);
}

.splash-page {
  position: fixed;
  inset: 0;
  z-index: 1000000;
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(320px, 1fr);
  gap: clamp(18px, 4vw, 48px);
  align-items: center;
  padding: clamp(18px, 5vw, 72px);
  background: #f5f7fb;
  color: var(--ink);
  overflow: auto;
}

.splash-page.is-hidden {
  display: none;
}

.splash-media {
  position: relative;
  min-height: min(64vw, 620px);
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.splash-grid {
  position: absolute;
  inset: clamp(18px, 4vw, 44px);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(4, 1fr);
  border: 1px solid #cbd5e1;
}

.splash-grid span {
  border: 1px solid #dbe3f0;
  background: #fafbff;
}

.splash-grid span:nth-child(3),
.splash-grid span:nth-child(8),
.splash-grid span:nth-child(11) {
  background: #eef2ff;
}

.splash-bot,
.splash-goal {
  position: absolute;
  width: clamp(48px, 9vw, 84px);
  aspect-ratio: 1;
  border-radius: 12px;
}

.splash-bot {
  left: 22%;
  bottom: 25%;
  background: var(--primary);
}

.splash-bot::before,
.splash-bot::after {
  content: "";
  position: absolute;
  top: 24%;
  width: 18%;
  height: 18%;
  border-radius: 3px;
  background: #111827;
}

.splash-bot::before {
  left: 23%;
}

.splash-bot::after {
  right: 23%;
}

.splash-goal {
  right: 20%;
  top: 28%;
  background: var(--gold);
}

.splash-copy {
  max-width: 660px;
}

.splash-copy h1 {
  margin: 0 0 12px;
  color: var(--primary);
  font-size: clamp(2.4rem, 7vw, 5.4rem);
  line-height: 0.92;
}

.splash-copy p {
  color: #475467;
  font-size: clamp(1rem, 2vw, 1.2rem);
  line-height: 1.55;
}

.splash-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 22px 0;
}

.splash-actions button {
  min-width: 150px;
}

.splash-chapters {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.splash-chapters article {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  padding: 12px;
}

.splash-chapters strong,
.splash-chapters span {
  display: block;
}

.splash-chapters strong {
  margin-bottom: 4px;
  font-size: 0.92rem;
}

.splash-chapters span {
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.35;
}

button,
select,
textarea {
  font: inherit;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px clamp(16px, 3vw, 32px);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.94);
  position: sticky;
  top: 0;
  z-index: 4;
}

.subtitle {
  max-width: 780px;
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.35;
}

.eyebrow {
  margin: 0 0 2px;
  color: #a855f7;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.eyebrow a {
  color: inherit;
  text-decoration: none;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 0;
  color: var(--primary);
  font-size: clamp(1.3rem, 2.6vw, 2rem);
  line-height: 1.05;
}

h2 {
  font-size: 1.1rem;
}

.topbar-actions,
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.topbar-actions select {
  width: auto;
  min-width: 116px;
}

button,
select {
  min-height: 40px;
  border: 2px solid transparent;
  border-radius: 8px;
  padding: 0 14px;
  cursor: pointer;
}

button:focus-visible,
select:focus-visible,
textarea:focus-visible,
input:focus-visible,
a:focus-visible {
  outline: 3px solid rgba(250, 166, 52, 0.55);
  outline-offset: 2px;
}

.primary-btn {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
  font-weight: 800;
}

.primary-btn:hover {
  background: var(--primary-dark);
}

.danger-btn {
  background: #fff3f1;
  border-color: #f2b8b0;
  color: var(--danger);
  font-weight: 800;
}

.ghost-btn,
.tab,
.link-btn,
.i18n-picker select {
  background: white;
  border-color: var(--line);
  color: var(--ink);
  font-weight: 750;
}

.ghost-btn:hover,
.tab:hover,
.link-btn:hover {
  border-color: var(--primary);
  background: #eef2ff;
}

.link-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 14px;
  border: 2px solid var(--line);
  border-radius: 8px;
  text-decoration: none;
  white-space: nowrap;
}

.home-link {
  border-color: var(--primary);
  background: var(--primary);
  color: white;
}

.home-link:hover {
  background: var(--primary-dark);
  color: white;
}

.full {
  width: 100%;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(300px, 0.95fr) minmax(360px, 1.2fr) minmax(220px, 0.55fr);
  gap: 16px;
  padding: 16px clamp(16px, 3vw, 32px) 28px;
}

.sim-panel,
.builder-panel,
.coach-panel {
  background: var(--panel);
  border: 2px solid #ddd6fe;
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.sim-panel {
  padding: 14px;
}

.mission-strip {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 10px;
  align-items: center;
  margin-bottom: 12px;
}

.mission-strip label {
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 800;
}

select {
  width: 100%;
  background: white;
  border-color: var(--line);
}

.grade-pill {
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  padding: 6px 10px;
  color: #344054;
  font-size: 0.78rem;
  font-weight: 800;
  white-space: nowrap;
}

canvas {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--field);
}

.status-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  margin-top: 12px;
}

.status-grid div {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 8px;
  background: #fafbff;
}

.status-grid span {
  display: block;
  color: var(--muted);
  font-size: 0.73rem;
  font-weight: 800;
}

.status-grid strong {
  display: block;
  overflow-wrap: anywhere;
  font-size: 0.9rem;
}

.device-panel {
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fafbff;
  padding: 12px;
}

.lab-panel {
  display: grid;
  gap: 10px;
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 12px;
}

.lab-panel details {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fafbff;
  padding: 9px 10px;
}

.lab-panel summary {
  cursor: pointer;
  color: var(--primary);
  font-weight: 900;
}

.jog-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  margin-top: 9px;
}

.lab-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-top: 8px;
}

.lab-actions span,
.constraint-readout {
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 850;
}

.constraint-readout {
  border: 1px dashed #c7d2fe;
  border-radius: 8px;
  background: #eef2ff;
  padding: 8px 10px;
  color: #3730a3;
}

.qr-output {
  display: grid;
  place-items: center;
  min-height: 120px;
  margin-top: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  overflow: auto;
}

.qr-output table {
  border-collapse: collapse;
}

.qr-output td {
  width: 4px;
  height: 4px;
  padding: 0;
}

#shareCode {
  min-height: 72px;
  margin-top: 8px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.78rem;
}

.device-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.device-header h2 {
  margin: 0;
  font-size: 1rem;
}

.device-header span {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.device-grid {
  display: grid;
  grid-template-columns: minmax(120px, 0.7fr) minmax(160px, 1fr);
  gap: 10px;
}

.signal-device,
.message-device,
.sound-device {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: white;
  padding: 10px;
}

.signal-device {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2px 10px;
  align-items: center;
}

.signal-light {
  grid-row: span 2;
  width: 34px;
  height: 34px;
  border: 2px solid #cbd5e1;
  border-radius: 999px;
  background: #e5e7eb;
  box-shadow: inset 0 1px 4px #11182733;
}

.signal-light.is-on {
  border-color: #df8c00;
  background: var(--gold);
  box-shadow: 0 0 18px #faa63499, inset 0 1px 5px #ffffffaa;
}

.signal-device strong,
.message-device strong,
.sound-device strong {
  color: var(--ink);
  font-size: 0.92rem;
}

.signal-device em,
.sound-device em {
  color: var(--muted);
  font-size: 0.85rem;
  font-style: normal;
  font-weight: 800;
}

.sound-device {
  display: grid;
  gap: 5px;
}

.message-device ol {
  display: grid;
  gap: 4px;
  min-height: 38px;
  max-height: 92px;
  overflow: auto;
  margin: 6px 0 0;
  padding-left: 20px;
  color: var(--muted);
  font-size: 0.85rem;
}

.builder-panel {
  min-height: 620px;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.tabs {
  padding: 10px;
  border-bottom: 1px solid var(--line);
}

.tab.is-active {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
}

.pane {
  display: none;
  flex: 1;
  min-height: 0;
}

.pane.is-active {
  display: flex;
  flex-direction: column;
}

#blocklyDiv {
  width: 100%;
  height: 100%;
  min-height: 560px;
}

#wordsPane {
  padding: 12px;
}

textarea {
  width: 100%;
  min-height: 380px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  color: var(--ink);
  background: #fafbff;
  line-height: 1.55;
}

.word-help {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.9rem;
}

.code-portability {
  border-top: 1px solid var(--line);
  background: #fbfcff;
  padding: 10px;
}

.code-portability summary {
  cursor: pointer;
  color: var(--primary);
  font-weight: 900;
}

.code-toolbar {
  display: grid;
  grid-template-columns: minmax(150px, 1fr) repeat(4, auto);
  gap: 8px;
  align-items: end;
  margin-top: 10px;
}

.code-toolbar label {
  display: grid;
  gap: 4px;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 900;
}

#portableCode {
  min-height: 220px;
  margin-top: 10px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.8rem;
  line-height: 1.45;
}

.code-note {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.82rem;
}

code {
  background: #eef2ff;
  border: 1px solid #c7d2fe;
  border-radius: 6px;
  padding: 2px 5px;
}

.coach-panel {
  padding: 16px;
}

.coach-panel p {
  color: var(--muted);
  line-height: 1.5;
}

.mission-meta {
  display: grid;
  gap: 8px;
  margin: 12px 0;
}

.mission-meta div,
.teacher-note {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fafbff;
  padding: 9px 10px;
}

.mission-meta dt {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 900;
  text-transform: uppercase;
}

.mission-meta dd {
  margin: 2px 0 0;
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 750;
  line-height: 1.35;
}

.progress-steps {
  display: grid;
  gap: 8px;
  margin: 14px 0;
}

.teacher-note {
  margin: 0 0 12px;
}

.thinking-lab {
  margin: 0 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 10px;
}

.teacher-note summary,
.mission-builder summary,
.thinking-lab summary {
  cursor: pointer;
  color: var(--primary);
  font-weight: 900;
}

body[data-role="student"] .teacher-note,
body[data-role="student"] .mission-builder,
body[data-role="student"] .device-panel,
body[data-role="student"] .lab-panel,
body[data-role="student"] .code-portability,
body[data-role="student"] .thinking-lab,
body[data-role="student"] #standardsSelect,
body[data-role="student"] #saveBtn,
body[data-role="student"] #exportBtn,
body[data-role="student"] #importBtn,
body[data-role="student"] #constraintBtn,
body[data-role="student"] #importMissionsBtn,
body[data-role="student"] #exportMissionsBtn {
  display: none;
}

.teacher-note p {
  margin: 8px 0 0;
  font-size: 0.92rem;
}

.mission-builder {
  margin: 0 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 10px;
}

.builder-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-top: 10px;
}

.mission-builder label {
  display: grid;
  gap: 4px;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 900;
}

.mission-builder input,
.mission-builder select,
.mission-builder textarea {
  width: 100%;
  min-height: 34px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fafbff;
  color: var(--ink);
  padding: 7px 8px;
  font: inherit;
  font-size: 0.86rem;
  font-weight: 650;
}

.builder-full {
  margin-top: 8px;
}

.builder-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 10px;
}

.thinking-lab label {
  display: grid;
  gap: 4px;
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 900;
}

.thinking-poster {
  display: block;
  width: 100%;
  margin-top: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fafbff;
}

#thinkingTagline {
  margin: 9px 0;
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 800;
  line-height: 1.35;
}

.thinking-activities {
  display: grid;
  gap: 8px;
  max-height: 420px;
  overflow: auto;
  padding-right: 2px;
}

.activity-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fafbff;
  padding: 9px 10px;
}

.activity-card h3 {
  margin: 0 0 4px;
  color: var(--ink);
  font-size: 0.9rem;
  line-height: 1.25;
}

.activity-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.35;
}

.activity-card em {
  display: block;
  margin-top: 6px;
  color: #475467;
  font-size: 0.8rem;
  font-style: normal;
  font-weight: 800;
  line-height: 1.35;
}

.standards-readout {
  display: grid;
  gap: 6px;
  margin-top: 10px;
  border: 1px dashed #c7d2fe;
  border-radius: 8px;
  background: #eef2ff;
  padding: 9px 10px;
}

.standards-readout strong {
  color: #3730a3;
  font-size: 0.82rem;
}

.standards-readout span {
  color: #344054;
  font-size: 0.78rem;
  line-height: 1.3;
}

.quest-section {
  margin-top: 12px;
}

.quest-section h3 {
  margin: 0 0 8px;
  color: var(--ink);
  font-size: 0.94rem;
  line-height: 1.2;
}

.quest-challenges {
  display: grid;
  gap: 8px;
  max-height: 360px;
  overflow: auto;
}

.quest-card {
  border: 1px solid #dbeafe;
  border-radius: 8px;
  background: #f8fbff;
  padding: 9px 10px;
}

.quest-card h4 {
  margin: 0 0 4px;
  color: #1d4ed8;
  font-size: 0.88rem;
  line-height: 1.25;
}

.quest-card p,
.quest-card em,
.quest-card span {
  display: block;
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
  font-style: normal;
  line-height: 1.35;
}

.quest-card em {
  margin-top: 5px;
  color: var(--ink);
}

.quest-card span {
  margin-top: 5px;
  font-weight: 800;
}

.story-section {
  margin-top: 12px;
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.story-section h3 {
  margin: 0 0 6px;
  color: var(--ink);
  font-size: 0.94rem;
  line-height: 1.2;
}

#storyPremise {
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 0.84rem;
  line-height: 1.4;
}

.story-chapters {
  display: grid;
  gap: 8px;
  max-height: 380px;
  overflow: auto;
}

.story-card {
  border: 1px solid #bbf7d0;
  border-radius: 8px;
  background: #f6fef9;
  padding: 9px 10px;
}

.story-card h4 {
  margin: 0 0 4px;
  color: #166534;
  font-size: 0.88rem;
  line-height: 1.25;
}

.story-card p,
.story-card em,
.story-card span {
  display: block;
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
  font-style: normal;
  line-height: 1.35;
}

.story-card em {
  margin-top: 5px;
  color: var(--ink);
  font-weight: 800;
}

.story-card span {
  margin-top: 5px;
  font-weight: 800;
}

.progress-steps div {
  border-left: 4px solid var(--line);
  padding: 8px 10px;
  background: #fbfcfa;
  border-radius: 6px;
  color: #344054;
  font-size: 0.92rem;
}

.progress-steps .done {
  border-left-color: var(--teal);
  color: var(--ink);
  font-weight: 750;
}

.run-message {
  min-height: 42px;
  margin: 12px 0;
  border: 1px solid #c7d2fe;
  border-radius: 8px;
  padding: 10px 12px;
  background: #eef2ff;
  color: #3730a3;
  font-size: 0.92rem;
  font-weight: 800;
  line-height: 1.35;
}

.run-message.success {
  border-color: #bbf7d0;
  background: #ecfdf5;
  color: #166534;
}

.run-message.warn {
  border-color: #fed7aa;
  background: #fff7ed;
  color: #9a3412;
}

.run-message.error {
  border-color: #fecaca;
  background: #fff3f1;
  color: #991b1b;
}

.blocklyToolboxDiv {
  background: #f7faf8;
}

.blocklyTreeLabel {
  font-family: inherit;
}

@media (max-width: 1120px) {
  .app-shell {
    grid-template-columns: minmax(280px, 0.9fr) minmax(360px, 1.1fr);
  }

  .coach-panel {
    grid-column: 1 / -1;
  }
}

@media (max-width: 760px) {
  .splash-page {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .splash-media {
    min-height: 300px;
  }

  .splash-chapters {
    grid-template-columns: 1fr;
  }

  .topbar {
    align-items: stretch;
    flex-direction: column;
  }

  .topbar-actions {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
  }

  .topbar-actions .i18n-picker,
  .topbar-actions .link-btn {
    min-width: 0;
  }

  .topbar-actions select {
    width: 100%;
    min-width: 0;
  }

  .app-shell {
    grid-template-columns: 1fr;
    padding-inline: 10px;
  }

  .mission-strip {
    grid-template-columns: 1fr;
    align-items: stretch;
  }

  .status-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .device-grid {
    grid-template-columns: 1fr;
  }

  .jog-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .builder-panel {
    min-height: 520px;
  }

  #blocklyDiv {
    min-height: 480px;
  }

  .code-toolbar {
    grid-template-columns: repeat(2, 1fr);
  }

  .code-toolbar label {
    grid-column: 1 / -1;
  }
}