:root {
  --color-text: #1a1a1a;
  --color-bg: #ffffff;
  --color-link: #0b4f6c;
  --color-link-hover: #083d54;
  --color-border: #d0d7de;
  --color-accent: #0b4f6c;
  --color-green: #1b6b3a;
  --color-amber: #8a5a00;
  --color-red: #9b1c1c;
  --color-muted: #4a5568;
  --color-surface: #f8fafc;
  --color-hint: #5a4a00;
  --color-hint-bg: #fff8e6;
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "Cascadia Code", "Source Code Pro", Menlo, Consolas, monospace;
  --max-width: 72rem;
  --focus-ring: 3px solid #0b4f6c;
  --radius: 0.375rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-text: #e8edf2;
    --color-bg: #0f1419;
    --color-link: #6ec4e8;
    --color-link-hover: #9edaf5;
    --color-border: #2d3748;
    --color-accent: #6ec4e8;
    --color-green: #6fcf97;
    --color-amber: #f0c674;
    --color-red: #f28b82;
    --color-muted: #a0aec0;
    --color-surface: #1a2332;
    --color-hint: #f0c674;
    --color-hint-bg: #2a2410;
    --focus-ring: 3px solid #6ec4e8;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 100%;
  scroll-behavior: smooth;
}

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

.skip-link {
  position: absolute;
  top: -3rem;
  left: 1rem;
  padding: 0.5rem 1rem;
  background: var(--color-accent);
  color: #fff;
  z-index: 100;
  text-decoration: none;
  border-radius: var(--radius);
}

.skip-link:focus {
  top: 1rem;
  outline: var(--focus-ring);
  outline-offset: 2px;
}

.site-header {
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 1.5rem;
  background: var(--color-surface);
}

.site-header__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.site-header nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
}

.site-header nav a,
.site-header nav button.lang-switch {
  display: inline-block;
  min-height: 24px;
  min-width: 24px;
  padding: 0.35rem 0.5rem;
  color: var(--color-link);
  text-decoration: underline;
  text-underline-offset: 0.15em;
  background: none;
  border: none;
  font: inherit;
  cursor: pointer;
}

.site-header nav a:hover,
.site-header nav a:focus,
.site-header nav button.lang-switch:hover,
.site-header nav button.lang-switch:focus-visible {
  color: var(--color-link-hover);
}

.site-header nav a:focus-visible,
.site-header nav button.lang-switch:focus-visible,
button:focus-visible,
a:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem;
}

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 1.5rem;
  margin-top: 3rem;
  font-size: 0.9375rem;
  color: var(--color-muted);
}

.site-footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.synthetic-banner {
  background: var(--color-hint-bg);
  border: 1px solid var(--color-amber);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  margin-bottom: 1.5rem;
  font-size: 0.9375rem;
}

.synthetic-banner strong {
  color: var(--color-amber);
}

.hero {
  margin-bottom: 2rem;
}

.hero h1 {
  font-size: clamp(1.5rem, 4vw, 2rem);
  line-height: 1.25;
  margin: 0 0 0.75rem;
}

.lead {
  font-size: 1.125rem;
  color: var(--color-muted);
  max-width: 42rem;
}

.card-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  margin: 2rem 0;
}

.card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  background: var(--color-surface);
}

.card h2 {
  font-size: 1.125rem;
  margin: 0 0 0.5rem;
}

.card p {
  margin: 0 0 1rem;
  font-size: 0.9375rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  min-width: 2.75rem;
  padding: 0.5rem 1.25rem;
  font: inherit;
  font-weight: 600;
  border-radius: var(--radius);
  border: 2px solid var(--color-accent);
  background: var(--color-accent);
  color: #fff;
  cursor: pointer;
  text-decoration: none;
}

.btn:hover {
  filter: brightness(1.08);
}

.btn--secondary {
  background: transparent;
  color: var(--color-accent);
}

.btn--ghost {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}

.notice {
  font-size: 0.875rem;
  color: var(--color-muted);
  border-left: 3px solid var(--color-border);
  padding-left: 0.75rem;
  margin: 1rem 0;
}

.practice-layout {
  display: grid;
  gap: 1.5rem;
  grid-template-columns: 1fr 1fr;
}

@media (max-width: 768px) {
  .practice-layout {
    grid-template-columns: 1fr;
  }
}

.panel {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  background: var(--color-surface);
}

.panel h2 {
  font-size: 1rem;
  margin: 0 0 0.75rem;
}

.source-doc {
  margin-bottom: 1rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.source-doc:last-child {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.sentence {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.5rem 0.75rem;
  margin: 0.25rem 0;
  border: 1px solid transparent;
  border-radius: var(--radius);
  background: transparent;
  font: inherit;
  color: inherit;
  cursor: pointer;
  line-height: 1.5;
}

.sentence:hover {
  background: rgba(11, 79, 108, 0.06);
}

.sentence.is-selected {
  border-color: var(--color-accent);
  background: rgba(11, 79, 108, 0.1);
}

.sentence.is-key {
  border-color: var(--color-green);
}

.claim-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 1rem;
  background: var(--color-bg);
}

.claim-card.is-active {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 1px var(--color-accent);
}

.claim-card label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.verdict-options {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.75rem 0;
}

.verdict-options label {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-height: 2.75rem;
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-weight: normal;
  cursor: pointer;
}

.verdict-options input:checked + span {
  font-weight: 600;
}

.hint-box {
  background: var(--color-hint-bg);
  border: 1px dashed var(--color-amber);
  border-radius: var(--radius);
  padding: 0.75rem;
  margin-top: 0.75rem;
  font-size: 0.9375rem;
}

.hint-box__label {
  font-weight: 700;
  color: var(--color-hint);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.hint-list {
  margin: 0.5rem 0 0;
  padding-left: 1.25rem;
}

.results-panel {
  border: 2px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-top: 1.5rem;
}

.score-display {
  font-size: 1.5rem;
  font-weight: 700;
}

.tag {
  display: inline-block;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 600;
  border: 1px solid var(--color-border);
  margin: 0.15rem;
}

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

.tag--miss {
  border-color: var(--color-red);
  color: var(--color-red);
}

.form-field {
  margin-bottom: 1rem;
}

.form-field label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.form-field textarea,
.form-field select,
.form-field input[type="text"] {
  width: 100%;
  padding: 0.5rem 0.75rem;
  font: inherit;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  color: var(--color-text);
  min-height: 2.75rem;
}

.form-field textarea {
  min-height: 8rem;
  resize: vertical;
}

.progress-bar {
  height: 0.5rem;
  background: var(--color-border);
  border-radius: 999px;
  overflow: hidden;
  margin: 0.5rem 0;
}

.progress-bar__fill {
  height: 100%;
  background: var(--color-accent);
  transition: width 0.2s ease;
  width: calc(var(--pct, 0) * 1%);
}

.progress-bar__fill.pct-0 { width: 0%; }
.progress-bar__fill.pct-5 { width: 5%; }
.progress-bar__fill.pct-10 { width: 10%; }
.progress-bar__fill.pct-15 { width: 15%; }
.progress-bar__fill.pct-20 { width: 20%; }
.progress-bar__fill.pct-25 { width: 25%; }
.progress-bar__fill.pct-30 { width: 30%; }
.progress-bar__fill.pct-35 { width: 35%; }
.progress-bar__fill.pct-40 { width: 40%; }
.progress-bar__fill.pct-45 { width: 45%; }
.progress-bar__fill.pct-50 { width: 50%; }
.progress-bar__fill.pct-55 { width: 55%; }
.progress-bar__fill.pct-60 { width: 60%; }
.progress-bar__fill.pct-65 { width: 65%; }
.progress-bar__fill.pct-70 { width: 70%; }
.progress-bar__fill.pct-75 { width: 75%; }
.progress-bar__fill.pct-80 { width: 80%; }
.progress-bar__fill.pct-85 { width: 85%; }
.progress-bar__fill.pct-90 { width: 90%; }
.progress-bar__fill.pct-95 { width: 95%; }
.progress-bar__fill.pct-100 { width: 100%; }

.model-panel {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  margin-bottom: 1rem;
  background: var(--color-surface);
}

.model-panel__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.5rem;
}

.model-panel__status {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--color-muted);
}

.correction-field label {
  display: block;
  width: 100%;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

.correction-field textarea {
  width: 100%;
  min-height: 5rem;
  padding: 0.5rem 0.75rem;
  font: inherit;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  color: var(--color-text);
}

.selected-list {
  margin: 0.35rem 0 0;
  padding-left: 1.25rem;
}

.hint-box[hidden] {
  display: none !important;
}

.fr-disclaimer-prominent[hidden] {
  display: none !important;
}

html[lang="fr"] .fr-disclaimer-prominent {
  display: block;
}

.footer-disclaimer {
  margin-top: 0.5rem;
  font-size: 0.875rem;
}

.input-error {
  color: var(--color-red);
  font-size: 0.9375rem;
}

.error-state {
  border: 1px solid var(--color-red);
  color: var(--color-red);
  padding: 0.75rem;
  border-radius: var(--radius);
}

.guide-section {
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.guide-section h2 {
  font-size: 1.125rem;
}

.example-box {
  background: var(--color-surface);
  border-left: 4px solid var(--color-accent);
  padding: 0.75rem 1rem;
  margin: 0.75rem 0;
  font-size: 0.9375rem;
}

.fictional-watermark {
  font-weight: 700;
  font-size: 0.875rem;
  text-align: center;
  padding: 0.5rem 0.75rem;
  margin-bottom: 1rem;
  border: 2px dashed var(--color-amber);
  color: var(--color-amber);
  background: var(--color-hint-bg);
}

.hint-gate,
.evidence-note {
  font-size: 0.9375rem;
  color: var(--color-muted);
  font-style: italic;
}

.notice--warn {
  border-left: 4px solid var(--color-amber);
  padding: 0.5rem 0.75rem;
  background: var(--color-hint-bg);
  color: var(--color-hint);
}

.nli-probs {
  margin-top: 0.75rem;
  padding: 0.75rem;
  background: var(--color-surface);
  border-radius: var(--radius);
  font-size: 0.9375rem;
}

.nli-limits {
  font-size: 0.8125rem;
  color: var(--color-muted);
}

.hint--number-mismatch {
  font-weight: 600;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

[aria-live] {
  min-height: 0;
}

@media print {
  .site-header,
  .site-footer,
  .skip-link,
  .btn,
  .no-print {
    display: none !important;
  }
  body {
    font-size: 11pt;
  }
  .panel {
    break-inside: avoid;
  }
}

/* Company mark in the site header */
.brand-lockup { display: inline-flex; align-items: center; gap: 0.6rem; }
.brand-lockup h1 { margin: 0; }
.brand-mark, .brand-mark img { display: block; width: 36px; height: 36px; flex: 0 0 auto; }