:root {
  color-scheme: light;
  font-family: Arial, sans-serif;
  background: #f5f7fb;
  color: #18212f;
  line-height: 1.45;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
}

button,
a {
  touch-action: manipulation;
}

.app-shell {
  min-height: 100vh;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 64px;
  padding: 12px clamp(16px, 4vw, 40px);
  background: #ffffff;
  border-bottom: 1px solid #d9e0ea;
}

.brand {
  font-size: 18px;
  font-weight: 700;
}

.nav {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.demo-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.nav a,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 16px;
  border: 1px solid #b8c4d5;
  border-radius: 8px;
  background: #ffffff;
  color: #18212f;
  text-decoration: none;
  font-weight: 700;
}

.button.primary {
  background: #1f6feb;
  border-color: #1f6feb;
  color: #ffffff;
}

.button:disabled,
button:disabled {
  cursor: wait;
  opacity: 0.66;
}

.page {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 48px;
}

.hero {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: end;
  margin-bottom: 24px;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 8px;
  font-size: clamp(28px, 5vw, 44px);
}

h2 {
  margin-bottom: 14px;
  font-size: 22px;
}

.muted {
  color: #526174;
}

.grid {
  display: grid;
  gap: 16px;
}

.grid.two {
  grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
}

.dashboard-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(260px, 0.65fr);
  gap: 16px;
  margin-top: 16px;
  align-items: start;
}

.welcome-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.4fr);
  gap: 16px;
  align-items: start;
}

.lesson-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: 16px;
  align-items: start;
}

.lesson-layout.lower {
  margin-top: 16px;
}

.voice-panel {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 18px;
  border: 1px solid #d7dfeb;
  border-radius: 8px;
  background: #ffffff;
}

.voice-panel h2 {
  margin-bottom: 6px;
}

.voice-controls {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.stat {
  display: grid;
  gap: 4px;
  min-height: 112px;
  padding: 18px;
  border: 1px solid #d7dfeb;
  border-radius: 8px;
  background: #ffffff;
}

.stat strong {
  font-size: 30px;
  line-height: 1.1;
}

.metric {
  margin-bottom: 4px;
  font-size: 28px;
  font-weight: 700;
}

.section-block {
  margin-top: 24px;
}

.current-lesson {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: center;
  margin: 16px 0;
  padding: 18px;
  border: 1px solid #b8c4d5;
  border-radius: 8px;
  background: #ffffff;
}

.weekly-progress {
  display: grid;
  gap: 14px;
  margin: 16px 0 24px;
  padding: 18px;
  border: 1px solid #b8c4d5;
  border-radius: 8px;
  background: #ffffff;
}

.weekly-progress h2 {
  margin-bottom: 6px;
}

.current-lesson h2 {
  margin-bottom: 6px;
}

.eyebrow {
  margin-bottom: 6px;
  color: #526174;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

.card {
  min-width: 0;
  padding: 18px;
  border: 1px solid #d7dfeb;
  border-radius: 8px;
  background: #ffffff;
}

.card h3 {
  margin-bottom: 8px;
  font-size: 20px;
}

.meta {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin: 12px 0;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 10px;
  border-radius: 999px;
  background: #e8eef7;
  color: #27384f;
  font-size: 14px;
  font-weight: 700;
}

.pill.success {
  background: #e8f6ee;
  color: #235c3b;
}

.pill.active {
  background: #fff7e0;
  color: #674e00;
}

.lesson-card {
  display: grid;
  align-content: start;
  gap: 8px;
}

.lesson-admin-card {
  display: grid;
  gap: 10px;
}

.feature-card {
  min-height: 170px;
}

.parent-student-card {
  display: grid;
  gap: 14px;
}

.parent-summary-list {
  display: grid;
  gap: 12px;
  margin: 0;
}

.parent-summary-list div {
  display: grid;
  gap: 2px;
}

.parent-summary-list dt {
  color: #526174;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

.parent-summary-list dd {
  margin: 0;
  color: #18212f;
}

.progress-track {
  width: 100%;
  height: 10px;
  overflow: hidden;
  border-radius: 999px;
  background: #e8eef7;
}

.progress-track span {
  display: block;
  height: 100%;
  min-width: 2px;
  border-radius: inherit;
  background: #2f7d4f;
}

.list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.list li {
  padding: 12px;
  border: 1px solid #d7dfeb;
  border-radius: 8px;
  background: #ffffff;
}

.status {
  padding: 16px;
  border-radius: 8px;
  background: #fff7e0;
  border: 1px solid #e3c66d;
}

.status.compact {
  padding: 12px;
}

.safety-banner {
  border-color: #c9d7e8;
  background: #f8fbff;
  color: #27384f;
}

.error {
  padding: 16px;
  border-radius: 8px;
  background: #fdecec;
  border: 1px solid #e19a9a;
}

.lesson-placeholder {
  aspect-ratio: 16 / 9;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: #172033;
  color: #ffffff;
  text-align: center;
  padding: 24px;
  min-height: 220px;
}

.lesson-placeholder.intentional {
  background: linear-gradient(135deg, #172033 0%, #234454 100%);
}

.mission-box {
  margin-top: 18px;
  padding: 16px;
  border: 1px solid #d7dfeb;
  border-radius: 8px;
  background: #f8fbff;
}

.mission-box h2 {
  margin-bottom: 6px;
}

.lesson-flow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.flow-step {
  display: grid;
  gap: 4px;
  min-height: 118px;
  padding: 14px;
  border: 1px solid #d7dfeb;
  border-radius: 8px;
  background: #ffffff;
}

.flow-step strong {
  font-size: 18px;
}

.flow-step span {
  color: #526174;
  font-size: 14px;
}

.stack {
  display: grid;
  gap: 14px;
}

.question {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 14px;
  border: 1px solid #d7dfeb;
  border-radius: 8px;
}

.question legend {
  padding: 0 4px;
  font-weight: 700;
}

.question label {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
}

.checkpoint-summary {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-bottom: 12px;
}

.checkpoint-summary strong {
  font-size: 28px;
}

.checkpoint-question {
  background: #f8fbff;
}

.checkpoint-question legend::before {
  content: "Checkpoint " attr(data-checkpoint-index) " ";
}

.choice-button {
  width: 100%;
  min-height: 48px;
  padding: 10px 12px;
  border: 1px solid #b8c4d5;
  border-radius: 8px;
  background: #ffffff;
  color: #18212f;
  font: inherit;
  font-weight: 700;
  text-align: left;
}

.choice-button:hover {
  border-color: #1f6feb;
  background: #f4f8ff;
}

.choice-button.selected {
  border-width: 2px;
}

.choice-button.correct {
  border-color: #2f7d4f;
  background: #e8f6ee;
}

.choice-button.incorrect {
  border-color: #b85c5c;
  background: #fdecec;
}

.choice-feedback {
  min-height: 22px;
}

textarea {
  width: 100%;
  margin-top: 6px;
  padding: 12px;
  border: 1px solid #b8c4d5;
  border-radius: 8px;
  font: inherit;
  resize: vertical;
}

select {
  width: 100%;
  min-height: 48px;
  margin-top: 6px;
  padding: 0 12px;
  border: 1px solid #b8c4d5;
  border-radius: 8px;
  background: #ffffff;
  font: inherit;
}

.inline-result {
  margin-top: 12px;
}

.messages {
  display: grid;
  gap: 10px;
  max-height: 320px;
  margin: 0 0 14px;
  padding: 0;
  overflow-y: auto;
  list-style: none;
}

.message {
  padding: 12px;
  border-radius: 8px;
  background: #eef3f9;
}

.message.assistant {
  background: #e8f6ee;
}

.message p {
  margin-bottom: 0;
}

.table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: 8px;
  background: #ffffff;
}

.table th,
.table td {
  padding: 14px;
  border-bottom: 1px solid #d7dfeb;
  text-align: left;
}

.table th {
  background: #eef3f9;
  font-size: 14px;
}

@media (max-width: 760px) {
  .topbar,
  .hero {
    align-items: stretch;
    flex-direction: column;
    grid-template-columns: 1fr;
  }

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

  .dashboard-layout,
  .welcome-grid,
  .current-lesson,
  .lesson-flow {
    grid-template-columns: 1fr;
  }

  .lesson-layout {
    grid-template-columns: 1fr;
  }

  .voice-panel {
    grid-template-columns: 1fr;
  }

  .voice-controls {
    justify-content: stretch;
  }

  .demo-links {
    display: grid;
  }

  .nav a,
  .actions,
  .button {
    width: 100%;
  }

  .actions {
    justify-content: stretch;
  }

  .table {
    display: block;
    overflow-x: auto;
  }
}

@media (min-width: 761px) and (max-width: 1040px) {
  .page {
    width: min(100% - 28px, 960px);
  }

  .lesson-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .dashboard-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .welcome-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .voice-panel {
    grid-template-columns: minmax(0, 1fr);
  }

  .lesson-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .voice-controls {
    justify-content: stretch;
  }

  .lesson-layout .card {
    padding: 20px;
  }

  .messages {
    max-height: 380px;
  }
}