:root {
  --diff-delete: #ff8d8d;
  --diff-delete-bg: color-mix(in srgb, #c94d56 19%, transparent);
  --diff-insert: #70d7bd;
  --diff-insert-bg: color-mix(in srgb, #2f9d83 21%, transparent);
  --diff-context-bg: color-mix(in srgb, var(--surface-sunken) 52%, transparent);
  --tournament-glow: color-mix(in srgb, var(--orange-500) 22%, transparent);
}

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

.tournament-page {
  width: min(100% - 2rem, 1780px);
  padding-top: 2rem;
}

.breadcrumb {
  display: flex;
  gap: 0.55rem;
  align-items: center;
  margin-bottom: 1.5rem;
  color: var(--text-faint);
  font-family: var(--font-mono);
  font-size: 13px;
}

.breadcrumb a {
  color: var(--text-muted);
  text-underline-offset: 0.2em;
}

.tournament-heading {
  grid-template-columns: minmax(0, 1fr) minmax(22rem, 36rem);
  align-items: center;
  margin-bottom: 1.25rem;
}

.tournament-heading .page-intro {
  max-width: 66ch;
  margin-top: 0.9rem;
  margin-bottom: 0;
}

.experiment-status {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 1rem;
  align-items: center;
  min-height: 7rem;
  padding: 1.15rem 1.25rem;
  border: 1px solid color-mix(in srgb, var(--orange-500) 35%, var(--border-default));
  border-radius: 14px;
  background:
    radial-gradient(circle at 12% 22%, var(--tournament-glow), transparent 42%),
    var(--surface-card);
  box-shadow: var(--shadow-sm);
}

.experiment-glyph {
  display: grid;
  width: 3.3rem;
  height: 3.3rem;
  place-items: center;
  color: var(--orange-500);
  border: 1px solid color-mix(in srgb, var(--orange-500) 60%, transparent);
  border-radius: 12px;
  font: 800 1.7rem/1 var(--font-display);
  background: color-mix(in srgb, var(--orange-500) 10%, transparent);
}

.experiment-status strong {
  color: var(--text-strong);
  font: 650 1.3rem/1.2 var(--font-display);
}

.experiment-status p {
  margin: 0.35rem 0 0;
  color: var(--text-muted);
  font: 16px/1.5 var(--font-body);
}

.authority-note {
  display: flex;
  gap: 0.65rem 1rem;
  align-items: baseline;
  margin-bottom: 1rem;
  padding: 0.8rem 1rem;
  color: var(--text-muted);
  border: 1px solid var(--border-default);
  border-radius: 10px;
  font: 15px/1.45 var(--font-body);
  background: var(--surface-sunken);
}

.authority-note strong {
  flex: 0 0 auto;
  color: var(--orange-300);
  font-family: var(--font-display);
}

.tournament-grid {
  display: grid;
  grid-template-columns: minmax(18rem, 21rem) minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
}

.tournament-bracket,
.diff-stage {
  border: 1px solid var(--border-default);
  border-radius: 14px;
  background: var(--surface-card);
  box-shadow: var(--shadow-sm);
}

.tournament-bracket {
  position: sticky;
  top: 1rem;
  max-height: calc(100vh - 2rem);
  overflow: hidden auto;
  scrollbar-color: var(--border-strong) transparent;
}

.bracket-heading {
  position: sticky;
  z-index: 2;
  top: 0;
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  padding: 1rem;
  border-bottom: 1px solid var(--border-default);
  background: color-mix(in srgb, var(--surface-card) 94%, transparent);
  backdrop-filter: blur(10px);
}

.bracket-heading h2 {
  margin: 0;
  color: var(--text-strong);
  font: 650 1.35rem/1.2 var(--font-display);
}

.bracket-heading .panel-kicker {
  margin-bottom: 0.25rem;
}

.bracket-heading .data-state {
  min-width: 4.5rem;
  padding: 0.35rem 0.5rem;
  font-size: 12px;
  text-align: center;
}

.bracket-toggle {
  display: none;
}

.version-navigation {
  padding: 0.9rem;
}

.bracket-loading,
.diff-loading {
  display: grid;
  place-items: center;
  min-height: 12rem;
  color: var(--text-muted);
  text-align: center;
}

.bracket-loading span,
.diff-loading > span {
  color: var(--orange-500);
  font: 800 2rem/1 var(--font-display);
}

.bracket-loading p,
.diff-loading p {
  margin: 0.65rem 0 0;
}

.bracket-seed,
.bracket-round {
  position: relative;
}

.bracket-round {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-default);
}

.bracket-round::before {
  position: absolute;
  top: -1rem;
  left: 1.35rem;
  width: 1px;
  height: 1rem;
  content: "";
  background: var(--border-strong);
}

.round-heading {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  padding: 0 0.2rem;
}

.round-heading strong {
  color: var(--text-muted);
  font: 750 12px/1 var(--font-mono);
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.round-heading span {
  color: var(--text-faint);
  font: 12px/1 var(--font-mono);
}

.version-list {
  display: grid;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.version-card {
  position: relative;
  display: grid;
  grid-template-columns: 2.7rem minmax(0, 1fr) auto;
  gap: 0.65rem;
  align-items: center;
  min-height: 4.1rem;
  padding: 0.55rem 0.65rem;
  color: var(--text-muted);
  border: 1px solid var(--border-default);
  border-radius: 10px;
  text-decoration: none;
  background: var(--surface-raised);
}

.version-card:hover {
  color: var(--text-strong);
  border-color: var(--border-strong);
  transform: translateX(2px);
}

.version-card[aria-current="page"] {
  color: var(--text-strong);
  border-color: var(--orange-500);
  background: color-mix(in srgb, var(--orange-500) 9%, var(--surface-raised));
  box-shadow: inset 3px 0 0 var(--orange-500);
}

.version-symbol {
  display: grid;
  width: 2.7rem;
  height: 2.7rem;
  place-items: center;
  color: var(--text-muted);
  border: 1px solid var(--border-strong);
  border-radius: 9px;
  font: 800 1rem/1 var(--font-mono);
  background: var(--surface-sunken);
}

.version-card[data-state="champion"] .version-symbol {
  color: var(--gray-900);
  border-color: var(--orange-300);
  background: var(--orange-400);
}

.version-card[data-state="eliminated"] .version-symbol {
  opacity: 0.62;
  text-decoration: line-through;
}

.version-copy {
  min-width: 0;
}

.version-copy strong,
.version-copy small {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.version-copy strong {
  color: inherit;
  font: 650 15px/1.25 var(--font-display);
}

.version-copy small {
  margin-top: 0.2rem;
  color: var(--text-faint);
  font: 10.5px/1.2 var(--font-mono);
}

.version-result {
  padding: 0.3rem 0.4rem;
  color: var(--text-faint);
  border: 1px solid var(--border-default);
  border-radius: 999px;
  font: 700 10px/1 var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.version-card[data-state="champion"] .version-result,
.version-card[data-state="advanced"] .version-result {
  color: var(--orange-300);
  border-color: color-mix(in srgb, var(--orange-500) 45%, var(--border-default));
}

.bracket-note {
  margin: 0;
  padding: 0.85rem 1rem 1rem;
  color: var(--text-faint);
  border-top: 1px solid var(--border-default);
  font: 12px/1.45 var(--font-mono);
}

.diff-stage {
  min-width: 0;
  overflow: hidden;
}

.candidate-toolbar {
  display: flex;
  gap: 1.25rem;
  align-items: end;
  justify-content: space-between;
  padding: 1.2rem 1.35rem;
  border-bottom: 1px solid var(--border-default);
  background:
    linear-gradient(110deg, var(--tournament-glow), transparent 42%),
    var(--surface-card);
}

.candidate-heading {
  min-width: 0;
}

.candidate-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-items: center;
  margin-bottom: 0.55rem;
}

.experiment-badge,
.result-badge {
  display: inline-flex;
  min-height: 1.75rem;
  align-items: center;
  padding: 0.3rem 0.55rem;
  border-radius: 999px;
  font: 750 11px/1 var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.experiment-badge {
  color: var(--orange-300);
  border: 1px solid color-mix(in srgb, var(--orange-500) 45%, var(--border-default));
  background: color-mix(in srgb, var(--orange-500) 9%, transparent);
}

.result-badge {
  color: var(--text-muted);
  border: 1px solid var(--border-default);
  background: var(--surface-sunken);
}

.result-badge[data-state="champion"] {
  color: var(--gray-900);
  border-color: var(--orange-300);
  background: var(--orange-400);
}

.candidate-heading h2 {
  margin: 0;
  color: var(--gray-50);
  font: 660 clamp(2rem, 4vw, 3.1rem)/1.05 var(--font-display);
  letter-spacing: -0.035em;
}

.candidate-heading h2:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 0.25rem;
}

.candidate-heading p {
  margin: 0.55rem 0 0;
  color: var(--text-muted);
  font: 16px/1.45 var(--font-body);
}

.candidate-links {
  display: flex;
  flex: 0 0 auto;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: end;
}

.candidate-links a {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  padding: 0.6rem 0.8rem;
  color: var(--text-strong);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  font: 650 14px/1 var(--font-display);
  text-decoration: none;
  background: var(--surface-raised);
}

.candidate-links a:hover {
  border-color: var(--orange-500);
}

.comparison-summary {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-bottom: 1px solid var(--border-default);
}

.comparison-summary > div {
  display: grid;
  gap: 0.25rem;
  min-height: 4.8rem;
  align-content: center;
  padding: 0.65rem 1rem;
  border-right: 1px solid var(--border-default);
}

.comparison-summary > div:last-child {
  border-right: 0;
}

.comparison-summary span {
  color: var(--text-faint);
  font: 700 11px/1 var(--font-mono);
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.comparison-summary strong {
  color: var(--text-strong);
  font: 650 1.25rem/1.2 var(--font-display);
}

.comparison-summary .is-insert {
  color: var(--diff-insert);
}

.comparison-summary .is-delete {
  color: var(--diff-delete);
}

.diff-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--border-default);
  background: var(--surface-sunken);
}

.segmented-control {
  display: inline-flex;
  padding: 0.2rem;
  border: 1px solid var(--border-default);
  border-radius: 9px;
  background: var(--surface-page);
}

.segmented-control button,
.change-navigation button {
  min-height: 2.55rem;
  color: var(--text-muted);
  border: 0;
  border-radius: 7px;
  background: transparent;
  cursor: pointer;
}

.segmented-control button {
  padding: 0.55rem 0.75rem;
  font: 650 14px/1 var(--font-display);
}

.segmented-control button[aria-pressed="true"] {
  color: var(--text-strong);
  background: var(--surface-raised);
  box-shadow: var(--shadow-xs);
}

.context-control {
  display: flex;
  gap: 0.6rem;
  min-height: 2.75rem;
  align-items: center;
  color: var(--text-muted);
  cursor: pointer;
}

.context-control input {
  width: 1.2rem;
  height: 1.2rem;
  accent-color: var(--orange-500);
}

.context-control strong,
.context-control small {
  display: block;
}

.context-control strong {
  color: var(--text-strong);
  font: 650 14px/1.2 var(--font-display);
}

.context-control small {
  margin-top: 0.2rem;
  color: var(--text-faint);
  font: 11px/1.2 var(--font-mono);
}

.change-navigation {
  display: flex;
  gap: 0.35rem;
  align-items: center;
}

.change-navigation button {
  width: 2.55rem;
  padding: 0;
  border: 1px solid var(--border-default);
  font: 800 17px/1 var(--font-mono);
}

.change-navigation button:not(:disabled):hover {
  color: var(--text-strong);
  border-color: var(--orange-500);
}

.change-navigation button:disabled {
  opacity: 0.38;
  cursor: not-allowed;
}

.change-navigation span {
  min-width: 7.5rem;
  color: var(--text-muted);
  font: 12px/1 var(--font-mono);
  text-align: center;
}

.diff-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1rem;
  padding: 0.6rem 1rem;
  color: var(--text-faint);
  border-bottom: 1px solid var(--border-default);
  font: 12px/1.3 var(--font-mono);
}

.diff-legend span {
  display: inline-flex;
  gap: 0.4rem;
  align-items: center;
}

.diff-legend i {
  width: 0.8rem;
  height: 0.8rem;
  border: 1px solid var(--border-strong);
  border-radius: 3px;
}

.legend-delete {
  background: var(--diff-delete-bg);
}

.legend-insert {
  background: var(--diff-insert-bg);
}

.legend-context {
  background: var(--diff-context-bg);
}

.diff-viewer {
  min-height: 36rem;
  background: var(--surface-page);
}

.diff-error,
.diff-empty {
  display: grid;
  min-height: 30rem;
  place-items: center;
  padding: 2rem;
  color: var(--text-muted);
  text-align: center;
}

.diff-error > div,
.diff-empty > div {
  max-width: 38rem;
}

.diff-error strong,
.diff-empty strong {
  display: block;
  margin-bottom: 0.5rem;
  color: var(--text-strong);
  font: 650 1.5rem/1.2 var(--font-display);
}

.diff-error button {
  min-height: 2.75rem;
  margin-top: 0.75rem;
  padding: 0.55rem 0.9rem;
  color: var(--text-strong);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: var(--surface-raised);
  cursor: pointer;
}

.diff-lines {
  display: grid;
  min-width: 0;
}

.diff-row {
  scroll-margin-top: 1rem;
}

.diff-row.is-targeted {
  box-shadow: inset 4px 0 0 var(--orange-500);
}

.unified-line {
  display: grid;
  grid-template-columns: 3.6rem 3.6rem 2rem minmax(0, 1fr);
  min-height: 2rem;
  border-bottom: 1px solid color-mix(in srgb, var(--border-default) 55%, transparent);
}

.unified-line[data-kind="delete"] {
  background: var(--diff-delete-bg);
}

.unified-line[data-kind="insert"] {
  background: var(--diff-insert-bg);
}

.line-number,
.line-marker {
  padding: 0.35rem 0.45rem;
  color: var(--text-faint);
  font: 11px/1.6 var(--font-mono);
  text-align: right;
  user-select: none;
}

.line-number {
  border-right: 1px solid color-mix(in srgb, var(--border-default) 60%, transparent);
}

.line-marker {
  color: var(--text-muted);
  text-align: center;
}

.line-text {
  min-width: 0;
  padding: 0.32rem 0.8rem 0.42rem;
  color: var(--text-muted);
  font: 17px/1.62 var(--font-body);
  overflow-wrap: anywhere;
  white-space: pre-wrap;
}

.line-text.is-heading {
  color: var(--gray-50);
  font: 650 1.15rem/1.45 var(--font-display);
}

.word-delete,
.word-insert {
  color: var(--text-strong);
  border-radius: 2px;
  text-decoration: none;
}

.word-delete {
  background: color-mix(in srgb, var(--diff-delete) 27%, transparent);
  box-shadow: inset 0 -1px 0 var(--diff-delete);
}

.word-insert {
  background: color-mix(in srgb, var(--diff-insert) 25%, transparent);
  box-shadow: inset 0 -1px 0 var(--diff-insert);
}

.split-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  border-bottom: 1px solid var(--border-default);
}

.split-cell {
  display: grid;
  grid-template-columns: 3.6rem minmax(0, 1fr);
  min-width: 0;
}

.split-cell:first-child {
  border-right: 1px solid var(--border-strong);
}

.split-cell[data-kind="delete"] {
  background: var(--diff-delete-bg);
}

.split-cell[data-kind="insert"] {
  background: var(--diff-insert-bg);
}

.split-cell.is-empty {
  background:
    repeating-linear-gradient(
      -45deg,
      transparent,
      transparent 8px,
      color-mix(in srgb, var(--border-default) 25%, transparent) 8px,
      color-mix(in srgb, var(--border-default) 25%, transparent) 9px
    );
}

.context-omission {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  padding: 0.45rem 1rem;
  border-bottom: 1px solid var(--border-default);
  background: var(--surface-sunken);
}

.context-omission button {
  min-height: 2.75rem;
  color: var(--text-muted);
  border: 1px dashed var(--border-strong);
  border-radius: 8px;
  font: 12px/1.3 var(--font-mono);
  background: transparent;
  cursor: pointer;
}

.context-omission button:hover {
  color: var(--text-strong);
  border-color: var(--orange-500);
}

.tournament-fallback {
  margin-top: 1rem;
  padding: 1.25rem;
  border: 1px solid var(--border-default);
  border-radius: 12px;
  background: var(--surface-card);
}

.tournament-fallback[hidden] {
  display: none;
}

.tournament-fallback h2 {
  color: var(--text-strong);
  font: 650 1.35rem/1.2 var(--font-display);
}

.tournament-fallback a {
  color: var(--orange-300);
}

.tournament-fallback li + li {
  margin-top: 0.4rem;
}

.noscript-note {
  color: var(--text-muted);
}

@media (max-width: 1080px) {
  .tournament-heading {
    grid-template-columns: minmax(0, 1fr);
  }

  .experiment-status {
    max-width: 48rem;
  }

  .tournament-grid {
    grid-template-columns: minmax(16rem, 18rem) minmax(0, 1fr);
  }

  .candidate-toolbar {
    align-items: start;
    flex-direction: column;
  }

  .candidate-links {
    justify-content: start;
  }
}

@media (max-width: 820px) {
  .tournament-page {
    width: min(100% - 1rem, 1780px);
    padding-top: 1.2rem;
  }

  .authority-note {
    align-items: start;
    flex-direction: column;
  }

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

  .tournament-bracket {
    position: static;
    max-height: none;
  }

  .bracket-heading {
    position: static;
  }

  .bracket-toggle {
    display: flex;
    width: calc(100% - 1.6rem);
    min-height: 3rem;
    align-items: center;
    justify-content: space-between;
    margin: 0.8rem;
    padding: 0.65rem 0.8rem;
    color: var(--text-strong);
    border: 1px solid var(--border-strong);
    border-radius: 9px;
    font: 650 15px/1 var(--font-display);
    background: var(--surface-raised);
  }

  .version-navigation[hidden] {
    display: none;
  }

  .bracket-note {
    display: none;
  }

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

  .comparison-summary > div:nth-child(2) {
    border-right: 0;
  }

  .comparison-summary > div:nth-child(-n + 2) {
    border-bottom: 1px solid var(--border-default);
  }

  #split-view {
    display: none;
  }

  .diff-controls {
    align-items: stretch;
    flex-direction: column;
  }

  .segmented-control,
  .change-navigation {
    justify-content: center;
  }

  .context-control {
    justify-content: center;
  }

  .split-row {
    grid-template-columns: minmax(0, 1fr);
  }

  .split-cell:first-child {
    border-right: 0;
    border-bottom: 1px dashed var(--border-strong);
  }
}

@media (max-width: 560px) {
  .breadcrumb {
    font-size: 11px;
  }

  .experiment-status {
    grid-template-columns: minmax(0, 1fr);
  }

  .experiment-glyph {
    width: 2.8rem;
    height: 2.8rem;
  }

  .candidate-toolbar {
    padding: 1rem;
  }

  .candidate-heading h2 {
    font-size: 2rem;
  }

  .candidate-links {
    width: 100%;
  }

  .candidate-links a {
    flex: 1 1 auto;
    justify-content: center;
  }

  .unified-line {
    grid-template-columns: 2.5rem 2.5rem 1.6rem minmax(0, 1fr);
  }

  .line-number {
    padding-inline: 0.2rem;
    font-size: 9px;
  }

  .line-marker {
    padding-inline: 0.15rem;
  }

  .line-text {
    padding-inline: 0.55rem;
    font-size: 16px;
    line-height: 1.58;
  }

  .diff-legend {
    align-items: start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  .version-card,
  .diff-row {
    scroll-behavior: auto;
    transition: none;
  }
}