:root {
  color-scheme: light;
  --ink: #17142a;
  --muted: #675f76;
  --canvas: #f7f6fb;
  --panel: #ffffff;
  --line: #e3deed;
  --purple: #6f3df4;
  --purple-soft: #eee8ff;
  --success: #238b6b;
  --warning: #f1cf67;
  --danger: #b75b50;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

button,
select,
input {
  font: inherit;
}

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

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

h1 {
  margin-bottom: 10px;
  font-size: 42px;
  line-height: 1.05;
  letter-spacing: 0;
  font-weight: 850;
}

h2 {
  margin-bottom: 8px;
  font-size: 30px;
  line-height: 1.15;
  letter-spacing: 0;
  font-weight: 850;
}

h3 {
  margin-bottom: 8px;
  font-size: 20px;
  line-height: 1.25;
  letter-spacing: 0;
  font-weight: 800;
}

p {
  color: var(--muted);
}

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

.platform-main {
  min-width: 0;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 70px;
  padding: 12px 22px;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}

.workspace-label,
.kicker {
  display: block;
  color: var(--purple);
  font-size: 12px;
  font-weight: 850;
  text-transform: uppercase;
}

.topbar strong {
  display: block;
  color: var(--ink);
  font-size: 18px;
  line-height: 1.1;
  overflow-wrap: anywhere;
}

.topbar-title {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.topbar-brand {
  display: block;
  width: 30px;
  height: 30px;
  overflow: hidden;
  flex: 0 0 auto;
}

.topbar-brand img {
  display: block;
  width: auto;
  max-width: none;
  height: 30px;
}

.topbar-context {
  padding-left: 14px;
  border-left: 1px solid var(--line);
}

.topbar .workspace-label {
  color: var(--purple);
}

.top-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.topbar-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  flex-wrap: wrap;
}

.top-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  padding: 8px 11px;
  border-radius: var(--radius);
  color: var(--muted);
  font-weight: 800;
}

.top-nav a:hover,
.top-nav a:focus-visible,
.top-nav a.active {
  background: var(--purple-soft);
  color: var(--purple);
  outline: none;
}

.learner-chip {
  display: inline-grid;
  grid-template-columns: auto auto auto auto;
  align-items: center;
  gap: 7px;
  min-height: 38px;
  padding: 5px 6px 5px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--canvas);
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.learner-chip strong {
  display: inline;
  color: var(--ink);
  font-size: 12px;
  line-height: 1;
}

#profile-sync-state {
  padding: 3px 6px;
  border-radius: var(--radius);
  background: #fff;
  color: var(--purple);
  font-size: 11px;
}

.learner-chip button {
  min-height: 28px;
  padding: 4px 8px;
  border: 1px solid #d9cdfb;
  border-radius: var(--radius);
  background: #fff;
  color: var(--purple);
  cursor: pointer;
  font-weight: 850;
}

.learner-chip button:hover,
.learner-chip button:focus-visible {
  border-color: var(--purple);
  outline: none;
}

.workspace {
  display: grid;
  gap: 18px;
  padding: 22px;
}

.page-section,
.track-card,
.quiz-controls,
.quiz-card,
.exam-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.page-section {
  scroll-margin-top: 88px;
}

.page-section {
  padding: 22px;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 18px;
}

.section-heading p {
  width: min(470px, 100%);
  margin-bottom: 0;
}

.button-row,
.quiz-actions,
.panel-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.primary-action,
.secondary-action,
.text-button,
.danger-button,
.segmented {
  min-height: 42px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  font-weight: 800;
}

.primary-action,
.secondary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 15px;
}

.primary-action {
  background: var(--purple);
  color: #fff;
}

.primary-action:hover,
.primary-action:focus-visible {
  background: #5c2ed1;
  outline: none;
}

.primary-action:disabled,
.secondary-action:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.secondary-action {
  background: var(--purple-soft);
  color: var(--ink);
  border-color: #d9cdfb;
}

.secondary-action:hover,
.secondary-action:focus-visible {
  border-color: var(--purple);
  outline: none;
}

.dashboard-actions {
  margin-top: 0;
}

.track-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.track-card {
  display: grid;
  align-content: start;
  min-height: 220px;
  padding: 15px;
}

.track-number {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  margin-bottom: 12px;
  border-radius: var(--radius);
  background: var(--purple-soft);
  color: var(--purple);
  font-weight: 850;
}

.track-card h3 {
  min-height: 52px;
  font-size: 18px;
}

.track-card p {
  color: var(--purple);
  font-weight: 750;
}

.track-card ul {
  display: grid;
  gap: 6px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
  font-size: 14px;
}

.track-card li {
  padding-left: 10px;
  border-left: 3px solid var(--purple-soft);
}

.text-button {
  padding: 9px 12px;
  background: var(--purple-soft);
  color: var(--purple);
}

.text-button:hover,
.text-button:focus-visible {
  background: #dfd3ff;
  outline: none;
}

.quiz-meta span {
  display: inline-flex;
  margin-bottom: 10px;
  padding: 4px 8px;
  border-radius: var(--radius);
  background: var(--purple-soft);
  color: var(--purple);
  font-size: 12px;
  font-weight: 850;
  text-transform: uppercase;
}

.quiz-layout {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.quiz-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--muted);
  font-weight: 750;
}

.quiz-stats span {
  padding: 7px 9px;
  border-radius: var(--radius);
  background: var(--canvas);
}

.quiz-controls,
.quiz-card,
.exam-card {
  padding: 16px;
}

.quiz-controls .primary-action,
.quiz-controls .danger-button,
.exam-overview .primary-action,
.exam-overview .secondary-action {
  width: 100%;
}

.control-group {
  display: grid;
  gap: 7px;
  margin-bottom: 16px;
}

.segmented {
  padding: 9px 11px;
  background: var(--canvas);
  color: var(--muted);
  text-align: left;
}

.segmented.active {
  background: var(--purple);
  color: #fff;
}

.select-label {
  display: block;
  margin-bottom: 7px;
  color: var(--ink);
  font-weight: 800;
}

select {
  width: 100%;
  min-height: 42px;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
}

input {
  width: 100%;
  min-height: 42px;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
}

input:focus-visible {
  border-color: var(--purple);
  outline: 2px solid #d9cdfb;
  outline-offset: 1px;
}

.profile-dialog {
  position: fixed;
  inset: 0;
  z-index: 30;
  display: grid;
  place-items: center;
  padding: 18px;
  background: rgba(23, 20, 42, 0.44);
}

.profile-dialog[hidden],
.learner-chip[hidden],
.secondary-action[hidden] {
  display: none;
}

.profile-card {
  display: grid;
  gap: 10px;
  width: min(420px, 100%);
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: 0 22px 70px rgba(23, 20, 42, 0.22);
}

.profile-card h2 {
  margin-bottom: 2px;
}

.profile-card p {
  margin: 4px 0 0;
  font-size: 13px;
}

.field-label {
  margin-top: 5px;
  color: var(--ink);
  font-weight: 850;
}

.form-error {
  color: var(--danger);
  font-weight: 800;
}

.form-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.danger-button {
  width: 100%;
  margin-top: 16px;
  padding: 9px 11px;
  background: #fff5f3;
  color: var(--danger);
  border-color: #edc7c1;
}

.danger-button:hover,
.danger-button:focus-visible {
  background: #ffe9e5;
  outline: none;
}

.quiz-card {
  min-height: 430px;
}

.exam-layout {
  display: grid;
  grid-template-columns: 214px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.exam-overview {
  display: grid;
  align-content: start;
  gap: 10px;
  padding: 4px 14px 4px 0;
  border-right: 1px solid var(--line);
}

.exam-overview-head {
  display: grid;
  gap: 2px;
}

.exam-overview-head strong {
  color: var(--ink);
  font-size: 14px;
}

.exam-overview-head span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 750;
}

.exam-question-nav {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 5px;
}

.exam-nav-button {
  display: grid;
  place-items: center;
  width: 100%;
  min-height: 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--canvas);
  color: var(--muted);
  cursor: pointer;
  font-size: 13px;
  font-weight: 850;
}

.exam-nav-button:hover,
.exam-nav-button:focus-visible {
  border-color: var(--purple);
  color: var(--purple);
  outline: none;
}

.exam-nav-button.saved {
  border-color: #b7dfcf;
  background: #eefaf5;
  color: var(--success);
}

.exam-nav-button.current {
  border-color: var(--purple);
  background: var(--purple);
  color: #fff;
}

.exam-card {
  min-height: 468px;
}

.exam-actions {
  justify-content: space-between;
}

.exam-overview .primary-action,
.exam-overview .secondary-action {
  min-height: 38px;
  padding: 8px 10px;
}

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

.answer-options {
  display: grid;
  gap: 9px;
  margin-top: 18px;
}

.answer-option {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  align-items: center;
  gap: 11px;
  width: 100%;
  min-height: 56px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
}

.answer-option:hover,
.answer-option:focus-visible {
  border-color: var(--purple);
  outline: none;
}

.answer-option.selected {
  border-color: var(--purple);
  background: var(--purple-soft);
}

.answer-option.correct {
  border-color: var(--success);
  background: #e8f8f2;
}

.answer-option.incorrect {
  border-color: var(--danger);
  background: #fff1ee;
}

.answer-key {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius);
  background: var(--purple-soft);
  color: var(--purple);
  font-weight: 850;
}

.feedback {
  margin-top: 14px;
  padding: 13px;
  border: 1px solid #d9cdfb;
  border-radius: var(--radius);
  background: #f8f4ff;
  color: #3e315d;
}

.exam-result {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.score-box {
  display: grid;
  gap: 5px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--canvas);
}

.score-box.passed {
  border-color: #b7dfcf;
  background: #eefaf5;
}

.score-box.failed {
  border-color: #efc4bc;
  background: #fff2ef;
}

.score-box span,
.score-box small {
  color: var(--muted);
  font-weight: 800;
}

.score-box strong {
  font-size: 34px;
  line-height: 1;
}

.exam-breakdown {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.exam-breakdown li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.recommendation {
  margin-bottom: 0;
  padding: 13px;
  border: 1px solid #d9cdfb;
  border-radius: var(--radius);
  background: #f8f4ff;
  color: #3e315d;
  font-weight: 700;
}

.exam-review {
  display: grid;
  gap: 8px;
}

.exam-review h4 {
  margin: 4px 0 2px;
  color: var(--ink);
  font-size: 18px;
}

.exam-review-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.exam-review-item.correct {
  border-color: #b7dfcf;
}

.exam-review-item.incorrect {
  border-color: #efc4bc;
}

.exam-review-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 12px;
  cursor: pointer;
  color: var(--ink);
  font-weight: 850;
}

.exam-review-item summary::marker {
  color: var(--purple);
}

.exam-review-item summary strong {
  color: var(--muted);
  font-size: 13px;
}

.exam-review-item.correct summary strong {
  color: var(--success);
}

.exam-review-item.incorrect summary strong {
  color: var(--danger);
}

.exam-review-item p {
  margin: 0;
  padding: 0 12px 10px;
}

.exam-review-item dl {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0 12px 12px;
}

.exam-review-item dl div {
  display: grid;
  gap: 2px;
}

.exam-review-item dt {
  color: var(--muted);
  font-size: 12px;
  font-weight: 850;
  text-transform: uppercase;
}

.exam-review-item dd {
  margin: 0;
  color: var(--ink);
}

@media (max-width: 1180px) {
  .track-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .control-group {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  h1 {
    font-size: 36px;
  }

  h2 {
    font-size: 28px;
  }

  .app-shell {
    grid-template-columns: 1fr;
  }

  .topbar {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  .topbar-actions {
    justify-content: flex-start;
  }

  .workspace {
    padding: 14px;
  }

  .page-section {
    padding: 16px;
  }

  .section-heading {
    align-items: start;
    flex-direction: column;
  }

  .track-list {
    grid-template-columns: 1fr;
  }

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

  .exam-overview {
    padding: 0 0 14px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .control-group {
    grid-template-columns: 1fr;
  }

  .exam-question-nav {
    grid-template-columns: repeat(10, minmax(0, 1fr));
  }
}

@media (max-width: 540px) {
  h1 {
    font-size: 34px;
  }

  h2 {
    font-size: 26px;
  }

  .top-nav {
    justify-content: flex-start;
  }

  .topbar-brand {
    width: 30px;
    height: 30px;
  }

  .topbar-context {
    padding-left: 12px;
  }

  .page-section {
    scroll-margin-top: 136px;
  }

  .exam-question-nav {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .exam-actions {
    display: grid;
    grid-template-columns: 1fr;
  }
}