:root {
  color-scheme: light;
  --ink: oklch(19% 0.025 250);
  --muted: oklch(45% 0.035 245);
  --soft: oklch(62% 0.028 245);
  --paper: oklch(98% 0.012 78);
  --surface: oklch(94% 0.018 78);
  --line: oklch(84% 0.025 78);
  --accent: oklch(57% 0.145 32);
  --accent-deep: oklch(36% 0.12 32);
  --blue: oklch(50% 0.11 242);
  --green: oklch(51% 0.12 152);
  --amber: oklch(70% 0.14 78);
  --red: oklch(55% 0.16 25);
  --shadow: 0 18px 48px oklch(25% 0.04 250 / 12%);
  --font: Avenir Next, Avenir, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --radius: 8px;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(90deg, oklch(92% 0.035 78) 0 1px, transparent 1px 100%) 0 0 / 44px 44px,
    var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.5;
}

button,
input,
select {
  font: inherit;
}

button,
select,
input {
  border-radius: var(--radius);
}

button:focus,
input:focus,
select:focus {
  outline: none;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
a:focus-visible {
  outline: 3px solid color-mix(in oklch, var(--accent), white 18%);
  outline-offset: 2px;
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 10;
  transform: translateY(-140%);
  background: var(--ink);
  color: var(--paper);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius);
}

.skip-link:focus {
  transform: translateY(0);
}

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

.sidebar {
  background: oklch(23% 0.035 250);
  color: oklch(96% 0.012 78);
  display: grid;
  grid-template-rows: auto auto 1fr;
  min-height: 100vh;
}

.brand {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-6);
  border-bottom: 1px solid oklch(42% 0.035 250);
}

.brand h1,
.detail-header h2 {
  margin: 0;
  font-size: 1.35rem;
  line-height: 1.12;
  letter-spacing: 0;
}

.eyebrow {
  margin: 0 0 var(--space-1);
  color: var(--soft);
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
}

.small-button,
.review-button {
  min-height: 40px;
  border: 1px solid currentColor;
  background: transparent;
  color: inherit;
  padding: var(--space-2) var(--space-3);
  cursor: pointer;
  transition: transform 150ms var(--ease), background 150ms var(--ease);
}

.small-button:hover,
.review-button:hover {
  transform: translateY(-1px);
}

.filters {
  display: grid;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid oklch(42% 0.035 250);
}

label {
  display: grid;
  gap: var(--space-1);
  color: color-mix(in oklch, currentColor, transparent 18%);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
}

input,
select {
  width: 100%;
  min-height: 44px;
  border: 1px solid oklch(49% 0.035 250);
  background: oklch(18% 0.03 250);
  color: oklch(97% 0.012 78);
  padding: var(--space-2) var(--space-3);
  text-transform: none;
}

.filter-row {
  display: grid;
  grid-template-columns: 0.7fr 1fr;
  gap: var(--space-3);
}

.question-list {
  overflow: auto;
  padding: var(--space-3);
}

.question-item {
  width: 100%;
  border: 0;
  border-left: 4px solid transparent;
  background: transparent;
  color: inherit;
  display: grid;
  gap: var(--space-2);
  padding: var(--space-3);
  text-align: left;
  cursor: pointer;
  border-radius: 0 var(--radius) var(--radius) 0;
}

.question-item:hover {
  background: oklch(28% 0.035 250);
}

.question-item.is-active {
  background: oklch(31% 0.04 250);
  border-left-color: var(--accent);
}

.question-line {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  font-weight: 700;
}

.question-snippet {
  color: oklch(80% 0.018 250);
  font-size: 0.88rem;
  line-height: 1.35;
}

.claim-pill {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  width: fit-content;
  border: 1px solid currentColor;
  border-radius: 999px;
  padding: 0 var(--space-2);
  color: var(--soft);
  font-size: 0.75rem;
  font-weight: 800;
  white-space: nowrap;
}

.claim-strong_investor_evidence {
  color: var(--green);
}

.claim-good_similarity {
  color: var(--blue);
}

.claim-same_skill_only {
  color: var(--amber);
}

.claim-weak_or_unrelated {
  color: var(--red);
}

.workspace {
  display: grid;
  grid-template-rows: auto auto 1fr;
  gap: var(--space-6);
  min-width: 0;
  padding: var(--space-4);
}

.metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
}

.metrics article {
  background: color-mix(in oklch, var(--surface), white 30%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: var(--space-4);
}

.metrics span {
  display: block;
  font-variant-numeric: tabular-nums;
  font-size: 1.9rem;
  font-weight: 800;
  line-height: 1;
}

.metrics p {
  margin: var(--space-2) 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.metric-highlight {
  background: color-mix(in oklch, var(--accent), white 84%) !important;
  border-color: color-mix(in oklch, var(--accent), white 45%) !important;
}

.detail-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-4);
}

.review-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: flex-end;
}

.review-button {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.review-button.secondary {
  background: transparent;
  color: var(--ink);
}

.comparison {
  display: grid;
  gap: var(--space-4);
  min-width: 0;
}

.pair {
  display: grid;
  gap: var(--space-4);
  align-items: start;
}

.question-panel,
.candidate-panel {
  background: color-mix(in oklch, var(--paper), white 44%);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  min-width: 0;
}

.panel-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: var(--space-3);
  border-bottom: 1px solid var(--line);
  padding: var(--space-4);
}

.panel-header h3 {
  margin: 0;
  font-size: 1rem;
  line-height: 1.25;
}

.panel-body {
  display: grid;
  gap: var(--space-4);
  padding: var(--space-4);
}

.text-block {
  display: grid;
  gap: var(--space-2);
}

.text-block p {
  margin: 0;
  overflow-wrap: anywhere;
}

.label {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
  text-transform: uppercase;
}

.choices {
  display: grid;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.choices li {
  border-top: 1px solid var(--line);
  padding-top: var(--space-2);
  overflow-wrap: anywhere;
}

.question-renderer {
  display: grid;
  gap: var(--space-4);
  min-width: 0;
}

.render-section {
  display: grid;
  gap: var(--space-2);
}

.markdown-body,
.choice-content,
.render-question,
.question-renderer td,
.question-renderer th {
  overflow-wrap: anywhere;
}

.markdown-body p,
.render-question p,
.choice-content p {
  margin: 0;
}

.markdown-body ul,
.markdown-body ol,
.render-question ul,
.render-question ol,
.choice-content ul,
.choice-content ol {
  margin: 0;
  padding-left: 1.25rem;
}

.markdown-body code,
.render-question code,
.choice-content code {
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--surface);
  padding: 0 0.25rem;
  font-size: 0.9em;
}

.render-question {
  color: var(--ink);
  font-size: 1rem;
  font-weight: 760;
}

.rich-choices,
.punctuation-choices {
  gap: var(--space-3);
}

.rich-choices li,
.punctuation-choices li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in oklch, var(--paper), white 50%);
  padding: var(--space-3);
}

.rich-choices li.is-correct,
.punctuation-choices li.is-correct,
.choice-table tr.is-correct,
.image-choice.is-correct {
  border-color: color-mix(in oklch, var(--green), white 32%);
  background: color-mix(in oklch, var(--green), white 88%);
}

.choice-indicator {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 2rem;
  height: 2rem;
  border: 1px solid currentColor;
  border-radius: 999px;
  color: var(--accent-deep);
  font-weight: 850;
  font-variant-numeric: tabular-nums;
}

.is-correct .choice-indicator {
  background: var(--green);
  border-color: var(--green);
  color: white;
}

.punctuation-body {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.35rem;
  font-size: 1rem;
}

.punctuation-body p {
  display: inline;
  margin: 0;
}

.punctuation-body b,
.punctuation-marks {
  color: var(--accent-deep);
  font-weight: 850;
}

.punctuation-marks {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-size: 1.2rem;
}

.numbered-string-list {
  display: grid;
  gap: var(--space-2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.numbered-string-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-3);
  border-top: 1px solid var(--line);
  padding-top: var(--space-2);
}

.number-label {
  color: var(--accent-deep);
  font-weight: 850;
}

.question-image,
.markdown-image {
  display: grid;
  justify-items: center;
  gap: var(--space-2);
  margin: 0;
}

.question-image img,
.markdown-image img {
  width: 100%;
  max-width: 600px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  object-fit: contain;
}

.question-image.compact img {
  aspect-ratio: 4 / 3;
  max-height: 220px;
}

.question-image figcaption,
.image-choice figcaption {
  color: var(--muted);
  font-size: 0.78rem;
  text-align: center;
}

.markdown-table-wrap,
.choice-table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.markdown-table-wrap table,
.choice-table {
  width: 100%;
  min-width: 420px;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.markdown-table-wrap th,
.markdown-table-wrap td,
.choice-table th,
.choice-table td {
  border: 1px solid var(--line);
  padding: var(--space-2) var(--space-3);
  vertical-align: top;
}

.markdown-table-wrap th,
.choice-table th {
  background: var(--surface);
  color: var(--muted);
  font-size: 0.75rem;
  font-weight: 850;
  text-transform: uppercase;
}

.choice-table td:first-child,
.choice-table th:first-child {
  width: 4rem;
  text-align: center;
}

.image-choice-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-3);
}

.image-choice {
  display: grid;
  gap: var(--space-2);
  align-content: start;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in oklch, var(--paper), white 50%);
  margin: 0;
  padding: var(--space-3);
}

.image-choice .choice-indicator {
  justify-self: start;
}

.katex-display,
mjx-container[display="true"] {
  overflow-x: auto;
  overflow-y: hidden;
  max-width: 100%;
  padding: var(--space-2) 0;
}

.candidate-stack {
  display: grid;
  gap: var(--space-4);
}

.score-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-2);
}

.score {
  display: grid;
  gap: var(--space-1);
}

.score meter {
  width: 100%;
  height: 8px;
}

.score span {
  display: flex;
  justify-content: space-between;
  gap: var(--space-2);
  color: var(--muted);
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
}

.rationale {
  border-left: 3px solid var(--accent);
  padding-left: var(--space-3);
  color: var(--accent-deep);
  font-weight: 700;
}

.empty {
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  padding: var(--space-8);
  color: var(--muted);
  text-align: center;
}

@media (min-width: 840px) {
  .app-shell {
    grid-template-columns: minmax(320px, 390px) 1fr;
  }

  .workspace {
    padding: var(--space-6);
  }

  .metrics {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .pair {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  }
}

@media (pointer: coarse) {
  .small-button,
  .review-button,
  .question-item {
    min-height: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}