:root {
  color-scheme: light;
  --bg: #f5f7f4;
  --panel: #ffffff;
  --panel-soft: #f1f5ed;
  --ink: #17211b;
  --muted: #5e6b62;
  --line: #d9e1d7;
  --green: #2f6f4e;
  --green-dark: #1d5338;
  --teal: #216b73;
  --amber: #a66316;
  --red: #a63b2f;
  --shadow: 0 16px 38px rgba(37, 55, 43, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(135deg, rgba(47, 111, 78, 0.08), transparent 34%),
    linear-gradient(225deg, rgba(166, 99, 22, 0.09), transparent 30%),
    var(--bg);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

button,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  width: min(1240px, calc(100vw - 32px));
  margin: 24px auto;
}

.topbar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.topbar h1 {
  margin: 4px 0 0;
  font-size: clamp(2rem, 5vw, 4.3rem);
  line-height: 0.95;
  letter-spacing: 0;
}

.eyebrow {
  margin: 0;
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status-pill {
  min-width: 160px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 10px 12px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
  text-align: center;
  box-shadow: var(--shadow);
}

.layout {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.setup-panel,
.workspace {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow);
}

.setup-panel {
  position: sticky;
  top: 18px;
  display: grid;
  gap: 14px;
  padding: 18px;
}

.workspace {
  min-height: 640px;
  padding: 20px;
}

.panel-heading,
.control-row,
.quiz-actions,
.results-header,
.quiz-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.panel-heading h2,
.intro-panel h2,
.quiz-header h2,
.results-header h2,
.results-view h3 {
  margin: 0;
}

.panel-heading h2 {
  font-size: 1.1rem;
}

.control-label {
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 800;
}

select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 10px 12px;
  color: var(--ink);
}

.control-block {
  display: grid;
  gap: 8px;
}

.domain-list {
  display: grid;
  gap: 8px;
}

.domain-toggle {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 8px;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  background: var(--panel-soft);
}

.domain-toggle input {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--green);
}

.domain-title {
  display: block;
  font-size: 0.9rem;
  font-weight: 800;
}

.domain-weight {
  color: var(--muted);
  font-size: 0.78rem;
}

.domain-count {
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 800;
}

.primary-button,
.secondary-button,
.ghost-button,
.text-button {
  border-radius: 8px;
  border: 1px solid transparent;
  min-height: 40px;
  padding: 9px 12px;
  font-weight: 800;
}

.primary-button {
  background: var(--green);
  color: #fff;
}

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

.secondary-button {
  background: var(--teal);
  color: #fff;
}

.secondary-button:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.ghost-button {
  border-color: var(--line);
  background: var(--panel);
  color: var(--ink);
}

.text-button {
  min-height: auto;
  padding: 0;
  background: transparent;
  color: var(--teal);
}

.setup-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.4;
}

.summary-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 18px;
}

.summary-strip > div,
.intro-panel,
.domain-card,
.result-card,
.review-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.summary-strip > div {
  padding: 14px;
}

.metric {
  display: block;
  font-size: 1.6rem;
  font-weight: 900;
}

.metric-label {
  color: var(--muted);
  font-size: 0.82rem;
}

.intro-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 12px;
  margin-bottom: 18px;
}

.intro-panel {
  padding: 18px;
}

.intro-panel h2 {
  font-size: 1.35rem;
}

.intro-panel p {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.55;
}

.intro-panel.subdued {
  background: #fbf8ef;
}

.domain-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.domain-card {
  display: grid;
  gap: 10px;
  padding: 16px;
}

.domain-card h3 {
  margin: 0;
  font-size: 1rem;
}

.domain-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.45;
}

.domain-card .bar {
  height: 8px;
  overflow: hidden;
  border-radius: 8px;
  background: #e4eadf;
}

.domain-card .bar span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--green), var(--teal));
}

.hidden {
  display: none !important;
}

.quiz-view {
  display: grid;
  gap: 16px;
}

.quiz-header h2 {
  margin-top: 6px;
  max-width: 820px;
  font-size: 1.55rem;
  line-height: 1.25;
}

.question-meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.progress-track {
  height: 10px;
  overflow: hidden;
  border-radius: 8px;
  background: #e1e8dc;
}

.progress-fill {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--green), var(--amber));
  transition: width 160ms ease;
}

.choices {
  display: grid;
  gap: 10px;
}

.choice-button {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 10px;
  align-items: start;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  padding: 14px;
  color: var(--ink);
  text-align: left;
}

.choice-button:hover {
  border-color: var(--teal);
}

.choice-button.selected {
  border-color: var(--teal);
  background: #edf7f5;
}

.choice-button.correct {
  border-color: var(--green);
  background: #ecf7ef;
}

.choice-button.incorrect {
  border-color: var(--red);
  background: #fff0ed;
}

.choice-key {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 50%;
  background: #e5ece0;
  color: var(--ink);
  font-weight: 900;
}

.feedback {
  border: 1px solid var(--line);
  border-left: 5px solid var(--teal);
  border-radius: 8px;
  padding: 14px;
  background: #f5faf8;
}

.feedback.correct {
  border-left-color: var(--green);
}

.feedback.incorrect {
  border-left-color: var(--red);
}

.feedback h3 {
  margin: 0 0 8px;
}

.feedback p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.results-view {
  display: grid;
  gap: 18px;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.result-card {
  padding: 16px;
}

.result-wide {
  grid-column: 1 / -1;
}

.result-card strong {
  display: block;
  font-size: 1.5rem;
}

.result-card span {
  color: var(--muted);
  font-size: 0.85rem;
}

.score-dashboard {
  display: grid;
  grid-template-columns: minmax(180px, 240px) minmax(0, 1fr);
  gap: 20px;
  align-items: center;
}

.score-chart {
  display: grid;
  justify-items: center;
  gap: 12px;
}

.donut-chart {
  width: 168px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: conic-gradient(var(--green) 0 var(--correct-pct), var(--red) var(--correct-pct) 100%);
  display: grid;
  grid-template-rows: auto auto;
  align-content: center;
  place-items: center;
  row-gap: 4px;
  position: relative;
  box-shadow: inset 0 0 0 1px rgba(23, 33, 27, 0.05);
}

.donut-chart::after {
  content: "";
  position: absolute;
  width: 104px;
  aspect-ratio: 1;
  border-radius: 50%;
  background: var(--panel);
  box-shadow: inset 0 0 0 1px var(--line);
}

.donut-chart strong,
.donut-chart span {
  position: relative;
  z-index: 1;
  text-align: center;
}

.donut-chart strong {
  font-size: 1.8rem;
  line-height: 1;
}

.donut-chart span {
  font-weight: 800;
}

.chart-legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
}

.chart-legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--ink);
  font-weight: 800;
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.correct-dot {
  background: var(--green);
}

.incorrect-dot {
  background: var(--red);
}

.score-detail {
  display: grid;
  gap: 12px;
}

.score-detail h3,
.domain-performance h3,
.study-plan h3,
.study-plan h4 {
  margin: 0;
}

.score-detail p,
.study-plan p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
}

.stacked-bar,
.domain-score-bar {
  height: 10px;
  overflow: hidden;
  border-radius: 999px;
  background: #ead8d5;
}

.stacked-bar {
  display: flex;
}

.correct-segment,
.incorrect-segment,
.domain-score-bar span {
  display: block;
  height: 100%;
}

.correct-segment,
.domain-score-bar span {
  background: linear-gradient(90deg, var(--green), var(--teal));
}

.incorrect-segment {
  background: var(--red);
}

.domain-performance {
  display: grid;
  gap: 14px;
}

.domain-score-list {
  display: grid;
  gap: 12px;
}

.domain-score-row {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) minmax(140px, 280px) 48px;
  align-items: center;
  gap: 12px;
}

.domain-score-row strong {
  display: block;
  font-size: 0.98rem;
}

.domain-score-row span {
  color: var(--muted);
}

.domain-score-row b {
  text-align: right;
}

.study-plan {
  display: grid;
  gap: 18px;
}

.study-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.study-grid section,
.remediation-list section {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-soft);
  padding: 14px;
}

.study-plan ul {
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--muted);
  line-height: 1.55;
}

.study-plan li + li {
  margin-top: 8px;
}

.remediation-list {
  display: grid;
  gap: 12px;
}

.review-list {
  display: grid;
  gap: 10px;
}

.review-item {
  display: grid;
  gap: 8px;
  padding: 14px;
}

.review-item h4 {
  margin: 0;
}

.review-item p {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.review-badge {
  justify-self: start;
  border-radius: 8px;
  padding: 4px 8px;
  background: var(--panel-soft);
  color: var(--green-dark);
  font-size: 0.76rem;
  font-weight: 900;
}

@media (max-width: 960px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .setup-panel {
    position: static;
  }

  .domain-grid,
  .intro-grid,
  .score-dashboard,
  .study-grid,
  .results-grid {
    grid-template-columns: 1fr;
  }

  .domain-score-row {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .domain-score-row b {
    text-align: left;
  }
}

@media (max-width: 640px) {
  .app-shell {
    width: min(100% - 20px, 1240px);
    margin: 10px auto;
  }

  .topbar,
  .quiz-header,
  .results-header,
  .quiz-actions {
    align-items: stretch;
    flex-direction: column;
  }

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

  .workspace,
  .setup-panel {
    padding: 14px;
  }
}