:root {
  color-scheme: light dark;
  --bg: #f7f4ee;
  --surface: #fffdf8;
  --surface-2: #ebe7dd;
  --text: #1f2421;
  --muted: #62685f;
  --border: #d7d0c2;
  --primary: #0f766e;
  --primary-2: #134e4a;
  --accent: #b45309;
  --good: #15803d;
  --bad: #b91c1c;
  --shadow: 0 18px 45px rgba(48, 41, 32, 0.12);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161915;
    --surface: #20251f;
    --surface-2: #2b3029;
    --text: #f3f1e9;
    --muted: #b9b7ad;
    --border: #3d453a;
    --primary: #2dd4bf;
    --primary-2: #5eead4;
    --accent: #f59e0b;
    --shadow: 0 18px 45px rgba(0, 0, 0, 0.28);
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem clamp(1rem, 4vw, 3rem);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(14px);
}

.brand {
  color: var(--text);
  font-weight: 800;
  text-decoration: none;
}

nav {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

nav a, .button {
  min-height: 2.55rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.65rem 0.9rem;
  color: var(--text);
  background: var(--surface);
  text-decoration: none;
  font: inherit;
  cursor: pointer;
}

nav a { border-color: transparent; background: transparent; }
nav a:hover, nav a[aria-current="page"], .button:hover { border-color: var(--primary); }
.auth-button {
  min-height: 2.35rem;
  padding: 0.55rem 0.8rem;
}
.user-menu {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  min-height: 2.55rem;
  color: var(--text);
}
.user-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border);
  object-fit: cover;
  background: var(--surface-2);
}
.user-name {
  max-width: 8rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 700;
}
.icon-button {
  width: 2.55rem;
  height: 2.55rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 0;
  color: var(--text);
  background: transparent;
  cursor: pointer;
}
.icon-button:hover, .icon-button:focus-visible {
  border-color: var(--primary);
  outline: none;
}
.icon-button svg {
  width: 1.25rem;
  height: 1.25rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.button.primary {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  font-weight: 700;
}
.button.disabled {
  color: var(--muted);
  border-color: var(--border);
  background: var(--surface-2);
  cursor: not-allowed;
}

main {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
}

.view { display: none; padding: 2rem 0 3rem; }
.view.active { display: block; }
.hidden { display: none !important; }

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(280px, 0.8fr);
  gap: 1.25rem;
  min-height: calc(100vh - 9rem);
  align-items: center;
}

.eyebrow {
  margin: 0 0 0.65rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1 {
  max-width: 850px;
  margin: 0;
  font-size: clamp(2.1rem, 7vw, 4.7rem);
  line-height: 0.97;
  letter-spacing: 0;
}

h2, h3 { letter-spacing: 0; }
.lead {
  max-width: 760px;
  color: var(--muted);
  font-size: 1.15rem;
  line-height: 1.6;
}

.actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 1.4rem;
}

.score-panel, .builder, .question-card, .results-card, details, .stats-output {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.score-panel { padding: 1.25rem; }
.score-panel h2 { margin-top: 0; }
.weight-list { display: grid; gap: 0.9rem; }
.weight-row { display: grid; gap: 0.35rem; }
.weight-label { display: flex; justify-content: space-between; gap: 0.75rem; font-weight: 700; }
.bar { height: 0.55rem; border-radius: 999px; background: var(--surface-2); overflow: hidden; }
.bar span { display: block; height: 100%; background: var(--primary); }

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 1rem;
  margin-bottom: 1rem;
}

.section-head h1 { font-size: clamp(1.9rem, 5vw, 3.25rem); }

.builder {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, minmax(150px, 0.7fr)) auto;
  gap: 1rem;
  align-items: end;
  padding: 1rem;
}

fieldset {
  border: 0;
  padding: 0;
  margin: 0;
}

legend, .field span {
  display: block;
  margin-bottom: 0.45rem;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 700;
}

.segmented {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.35rem;
}

.segmented label {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.35rem;
  min-height: 2.55rem;
  padding: 0.5rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-2);
  cursor: pointer;
}

.field input, .field select {
  width: 100%;
  min-height: 2.55rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.55rem 0.65rem;
  background: var(--surface);
  color: var(--text);
  font: inherit;
}

.runner, .results { margin-top: 1.25rem; }
.quiz-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
  margin-bottom: 1rem;
}

.progress {
  flex: 1;
  height: 0.65rem;
  background: var(--surface-2);
  border-radius: 999px;
  overflow: hidden;
}
.progress span { display: block; height: 100%; background: var(--primary); }
.question-list { display: grid; gap: 1rem; }
.question-card { padding: 1rem; box-shadow: none; }
.question-meta {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 0.86rem;
}
.question-card p { line-height: 1.5; }
.options { display: grid; gap: 0.5rem; }
.options label {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.6rem;
  align-items: start;
  padding: 0.65rem;
  border: 1px solid var(--border);
  border-radius: 8px;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1rem;
}
.results-card { padding: 1rem; box-shadow: none; }
.metric { font-size: 2.3rem; font-weight: 850; color: var(--primary-2); }
.review-item.correct { border-left: 5px solid var(--good); }
.review-item.incorrect { border-left: 5px solid var(--bad); }
.review-options {
  display: grid;
  gap: 0.5rem;
  margin: 0.6rem 0;
}
.review-option {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.6rem;
  align-items: center;
  padding: 0.6rem 0.7rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  line-height: 1.45;
}
.review-option.correct {
  border-color: var(--good);
  background: color-mix(in srgb, var(--good) 14%, transparent);
}
.review-option.chosen-wrong {
  border-color: var(--bad);
  background: color-mix(in srgb, var(--bad) 14%, transparent);
}
.option-tag {
  font-size: 0.78rem;
  font-weight: 800;
  white-space: nowrap;
}
.option-tag.good { color: var(--good); }
.option-tag.bad { color: var(--bad); }
.review-why {
  margin-top: 0.6rem;
  color: var(--text);
  line-height: 1.5;
}
.no-answer {
  color: var(--muted);
  font-style: italic;
}
.answer-good { color: var(--good); font-weight: 800; }
.answer-bad { color: var(--bad); font-weight: 800; }

.topics-browser {
  display: grid;
  gap: 0.85rem;
}
.topic-search {
  display: grid;
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.topic-search .field {
  display: grid;
  max-width: 620px;
}
.search-results {
  padding: 0.85rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.search-result-list {
  display: grid;
  gap: 0.6rem;
}
.search-result {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.25rem 0.6rem;
  padding: 0.75rem;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  text-decoration: none;
}
.search-result:hover, .search-result:focus-visible {
  border-color: var(--primary);
  outline: none;
}
.search-result strong,
.search-result span:not(.kind-badge),
.search-result p {
  min-width: 0;
}
.search-result span:not(.kind-badge) {
  grid-column: 2;
  color: var(--muted);
}
.search-result p {
  grid-column: 1 / -1;
  margin: 0.2rem 0 0;
  color: var(--muted);
  line-height: 1.45;
}
.kind-badge {
  align-self: start;
  padding: 0.16rem 0.45rem;
  color: var(--primary-2);
  background: color-mix(in srgb, var(--primary) 12%, transparent);
  border: 1px solid color-mix(in srgb, var(--primary) 35%, var(--border));
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 850;
  text-transform: uppercase;
}
details { padding: 0.5rem 1rem; box-shadow: none; }
summary { cursor: pointer; font-weight: 800; padding: 0.7rem 0; }
.topic-domain {
  display: grid;
  gap: 0.75rem;
}
.topic-domain-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: center;
}
.topic-domain-head h2 { margin: 0; }
.topic-domain-head span {
  color: var(--accent);
  font-weight: 800;
}
.topic-card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 0.75rem;
}
.topic-card {
  display: grid;
  gap: 0.45rem;
  min-height: 12rem;
  padding: 0.9rem;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  text-decoration: none;
}
.topic-card:hover { border-color: var(--primary); }
.topic-card strong { font-size: 1.1rem; }
.topic-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}
.resource-groups {
  display: grid;
  gap: 1.5rem;
}
.resource-group {
  display: grid;
  gap: 0.75rem;
}
.resource-card {
  min-height: 9rem;
}
.topic-block {
  border-top: 1px solid var(--border);
  padding: 0.9rem 0;
}
.concept-list { margin: 0.45rem 0 0; color: var(--muted); line-height: 1.55; }
.topic-page {
  display: grid;
  gap: 1.15rem;
  max-width: 880px;
  margin: 0 auto;
}
.topic-page h1 { font-size: clamp(2rem, 5vw, 3.6rem); }
.topic-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  color: var(--muted);
  font-size: 0.9rem;
}
.topic-breadcrumb a { color: var(--primary-2); font-weight: 800; }
.topic-position {
  margin: 0;
  color: var(--muted);
  font-weight: 800;
}
.topic-summary {
  color: var(--text);
  font-size: 1.1rem;
  line-height: 1.65;
}
.topic-summary p { margin: 0; }
.topic-section {
  display: grid;
  gap: 0.35rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
}
.topic-section h2 {
  margin: 0;
  font-size: 1.25rem;
}
.topic-nav {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 0.75rem;
  margin-top: 1rem;
}
.topic-nav .button:first-child { justify-self: start; }
.topic-nav .button:last-child { justify-self: end; }
.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 0.75rem;
  margin-top: 1rem;
}
.service-item {
  display: grid;
  gap: 0.45rem;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.85rem;
  background: var(--surface-2);
  text-decoration: none;
  cursor: pointer;
}
.service-item:hover, .service-item:focus-visible {
  border-color: var(--primary);
  outline: none;
}
.service-item strong { font-size: 1.05rem; }
.service-item p {
  margin: 0;
  line-height: 1.5;
}
.service-page .topic-summary {
  padding-bottom: 0.25rem;
}

footer {
  width: min(1180px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.5rem 0 2.5rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
}

.stats-output {
  margin-top: 1rem;
  padding: 1rem;
  white-space: pre-wrap;
  overflow: auto;
}

.modal-open { overflow: hidden; }
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 20;
  display: grid;
  place-items: center;
  padding: 1rem;
  background: rgba(0, 0, 0, 0.38);
}
.stats-dialog {
  width: min(760px, 100%);
  max-height: min(82vh, 760px);
  display: grid;
  grid-template-rows: auto 1fr;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: var(--shadow);
  overflow: hidden;
}
.stats-dialog-head {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem;
  border-bottom: 1px solid var(--border);
}
.stats-dialog-head h2 {
  margin: 0;
  font-size: 1.45rem;
}
.stats-panel {
  display: grid;
  gap: 1rem;
  padding: 1rem;
  overflow: auto;
}
.stat-tile-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
}
.stat-tile {
  min-height: 6rem;
  display: grid;
  align-content: center;
  gap: 0.35rem;
  padding: 0.85rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
}
.stat-tile span {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
}
.stat-tile strong {
  color: var(--primary-2);
  font-size: 1.85rem;
  line-height: 1;
}
.stats-breakdown {
  display: grid;
  gap: 0.6rem;
}
.stats-breakdown h3 {
  margin: 0;
  font-size: 1rem;
}
.stats-row-list {
  display: grid;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.stats-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: center;
  padding: 0.75rem 0.85rem;
  background: var(--surface);
}
.stats-row + .stats-row { border-top: 1px solid var(--border); }
.stats-row span {
  min-width: 0;
  overflow-wrap: anywhere;
}
.stats-row strong {
  color: var(--primary-2);
  white-space: nowrap;
}
.empty-state {
  margin: 0;
  color: var(--muted);
  line-height: 1.5;
}

.admin-root, .admin-grid {
  display: grid;
  gap: 1rem;
}
.admin-grid { margin-top: 1rem; }
.admin-table {
  display: grid;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.admin-table-row {
  display: grid;
  grid-template-columns: 1.2fr 1.4fr 1fr 1fr;
  gap: 1rem;
  align-items: center;
  padding: 0.75rem 0.85rem;
  background: var(--surface);
}
.admin-table-row + .admin-table-row { border-top: 1px solid var(--border); }
.admin-table-row span {
  min-width: 0;
  overflow-wrap: anywhere;
}
.admin-table-head {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 800;
  background: var(--surface-2);
}
.table-sort-button {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  border: 0;
  padding: 0;
  background: transparent;
  color: inherit;
  cursor: pointer;
  font: inherit;
  font-weight: inherit;
  text-align: left;
}
.table-sort-button:hover,
.table-sort-button:focus-visible {
  color: var(--primary-2);
}
.sort-indicator {
  display: inline-block;
  min-width: 0.8rem;
}
.member-cell {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.topic-pages-table .admin-table-row,
.pages-table .admin-table-row {
  grid-template-columns: minmax(0, 1fr) 7rem 1fr;
}
.admin-table-body {
  display: grid;
}
.admin-table-head + .admin-table-body .admin-table-row:first-child {
  border-top: 1px solid var(--border);
}

@media (max-width: 900px) {
  .hero, .builder, .results-grid { grid-template-columns: 1fr; }
  .hero { min-height: auto; padding-top: 2rem; }
  .segmented { grid-template-columns: repeat(2, 1fr); }
  .topbar { align-items: flex-start; flex-direction: column; }
  .stat-tile-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .admin-table-row { grid-template-columns: 1fr 1fr; }
  .topic-pages-table .admin-table-row,
  .pages-table .admin-table-row { grid-template-columns: 1fr 1fr; }
  .topic-nav { grid-template-columns: 1fr; }
  .topic-nav .button { justify-self: stretch; }
}

@media (max-width: 540px) {
  .modal-overlay { align-items: stretch; padding: 0.75rem; }
  .stats-dialog { max-height: 100%; }
  .stat-tile-grid { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: 1fr; gap: 0.3rem; }
  .stats-row strong { white-space: normal; }
  .admin-table-row { grid-template-columns: 1fr; gap: 0.35rem; }
  .topic-pages-table .admin-table-row,
  .pages-table .admin-table-row { grid-template-columns: 1fr; }
}