.pr-body {
  --pr-easy: #1f7a4d;
  --pr-medium: #a86a00;
  --pr-hard: #c0392b;
  --pr-pass: #1f7a4d;
  --pr-fail: #c0392b;
  --pr-pass-tint: rgba(31, 122, 77, 0.1);
  --pr-fail-tint: rgba(192, 57, 43, 0.08);
  --pr-editor-bg: var(--code-bg);
  background: var(--bg);
  color: var(--ink);
}

[data-theme="dark"] .pr-body {
  --pr-easy: #7fd38a;
  --pr-medium: #f0b44a;
  --pr-hard: #ff8a7a;
  --pr-pass: #7fd38a;
  --pr-fail: #ff8a7a;
  --pr-pass-tint: rgba(127, 211, 138, 0.1);
  --pr-fail-tint: rgba(255, 138, 122, 0.1);
}

.pr-page {
  max-width: 1240px;
  margin: 0 auto;
  padding: 104px 24px 48px;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.55;
}

.pr-page code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  overflow-wrap: anywhere;
}

.pr-visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.pr-kicker,
.pr-stats dt,
.pr-field > span,
.pr-chips legend,
.pr-count,
.pr-row-side,
.pr-crumbs,
.pr-prob-meta,
.pr-toolbar,
.pr-panel-head,
.pr-layer h3,
.pr-res-mark,
.pr-res-io > span,
.pr-res-why > span,
.pr-res-out > span,
.pr-hint-n,
.pr-pager,
.pr-other > span,
.pr-step-n,
.pr-track-meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.pr-kicker {
  color: var(--blueprint);
  font-weight: 700;
  margin-block-end: 12px;
}

.pr-index-head {
  padding-block-end: 28px;
  border-block-end: 1px solid var(--rule);
}

.pr-index-head h1 {
  margin-block-end: 16px;
}

.pr-lede {
  max-width: 760px;
  font-size: 1.08rem;
  color: var(--ink-soft);
}

.pr-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 0;
  margin-block: 24px 20px;
  border: 1px solid var(--rule);
}

.pr-stats div {
  padding: 12px 14px;
  border-inline-end: 1px solid var(--rule-soft);
}

.pr-stats div:last-child {
  border-inline-end: 0;
}

.pr-stats dt {
  color: var(--ink-mute);
}

.pr-stats dd {
  margin: 4px 0 0;
  font-family: var(--font-display);
  font-size: 1.8rem;
  line-height: 1;
  color: var(--blueprint);
}

.pr-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.pr-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 8px 16px;
  border: 1px solid var(--ink);
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition: transform var(--motion-press) var(--ease-out), background-color var(--motion-feedback) ease, color var(--motion-feedback) ease;
}

.pr-btn:hover {
  background: var(--ink);
  color: var(--bg);
}

.pr-btn:active {
  transform: scale(0.97);
}

.pr-btn:disabled {
  opacity: 0.5;
  cursor: progress;
}

.pr-btn-primary {
  background: var(--blueprint);
  border-color: var(--blueprint);
  color: #fff;
}

[data-theme="dark"] .pr-btn-primary {
  color: #0a0d1a;
}

.pr-btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: #fff;
}

.pr-btn-quiet {
  border-color: var(--rule-soft);
}

.pr-btn:focus-visible,
.pr-filters input:focus-visible,
.pr-filters select:focus-visible,
.pr-editor-input:focus-visible {
  outline: 2px solid var(--blueprint);
  outline-offset: 2px;
}

.pr-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 16px;
  align-items: end;
  margin-block: 28px 8px;
}

.pr-field {
  display: grid;
  gap: 6px;
  flex: 1 1 160px;
  min-width: 0;
  border: 0;
  margin: 0;
  padding: 0;
}

.pr-field > span,
.pr-chips legend {
  color: var(--ink-mute);
}

.pr-filters input[type="search"],
.pr-filters select {
  width: 100%;
  min-height: 40px;
  padding: 8px 10px;
  border: 1px solid var(--rule);
  border-radius: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 16px;
}

.pr-chips {
  display: flex;
  flex: 0 0 auto;
  flex-wrap: nowrap;
  gap: 0;
}

.pr-field-q {
  flex: 2 1 260px;
}

.pr-chips legend {
  width: 100%;
  margin-block-end: 6px;
  padding: 0;
}

.pr-chips label {
  position: relative;
}

.pr-chips input {
  position: absolute;
  opacity: 0;
  inset: 0;
  margin: 0;
  cursor: pointer;
}

.pr-chips span {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 12px;
  border: 1px solid var(--rule);
  margin-inline-end: -1px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
}

.pr-chips input:checked + span {
  background: var(--ink);
  color: var(--bg);
}

.pr-chips input:focus-visible + span {
  outline: 2px solid var(--blueprint);
  outline-offset: 2px;
}

.pr-section {
  margin-block-start: 36px;
}

.pr-section-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding-block-end: 10px;
  border-block-end: 1px solid var(--rule);
}

.pr-count {
  color: var(--ink-mute);
}

.pr-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.pr-row,
.pr-track-step {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr) auto;
  gap: 14px;
  align-items: start;
  padding: 16px 4px;
  border-block-end: 1px solid var(--rule-soft);
}

.pr-track-step {
  grid-template-columns: 34px 22px minmax(0, 1fr) auto;
}

.pr-row[hidden] {
  display: none;
}

.pr-row:hover {
  background: var(--blueprint-tint);
}

.pr-row-title {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--ink);
  text-decoration: none;
}

.pr-row-title:hover {
  color: var(--blueprint);
  text-decoration: underline;
}

.pr-row-sum,
.pr-row-lesson {
  margin: 4px 0 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.pr-row-tags,
.pr-prob-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 8px 0 0;
}

.pr-tag {
  padding: 1px 7px;
  border: 1px solid var(--rule-soft);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-soft);
  text-decoration: none;
}

a.pr-tag:hover {
  border-color: var(--blueprint);
  color: var(--blueprint);
}

.pr-row-side {
  display: grid;
  justify-items: end;
  gap: 4px;
  color: var(--ink-mute);
  white-space: nowrap;
}

.pr-diff {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.pr-diff-easy { color: var(--pr-easy); }
.pr-diff-medium { color: var(--pr-medium); }
.pr-diff-hard { color: var(--pr-hard); }

.pr-status {
  display: inline-block;
  width: 14px;
  height: 14px;
  margin-block-start: 4px;
  border: 1.5px solid var(--ink-mute);
  border-radius: 50%;
}

.pr-status[data-status="attempted"] {
  border-color: var(--pr-medium);
  background: linear-gradient(90deg, var(--pr-medium) 50%, transparent 50%);
}

.pr-status[data-status="solved"] {
  border-color: var(--pr-pass);
  background: var(--pr-pass);
}

.pr-status-wide {
  width: auto;
  height: auto;
  margin: 0;
  padding: 1px 8px;
  border-radius: 0;
  border-width: 1px;
}

.pr-status-wide[data-status="attempted"] {
  background: transparent;
  color: var(--pr-medium);
}

.pr-status-wide[data-status="solved"] {
  background: var(--pr-pass);
  color: var(--bg);
}

.pr-empty {
  padding: 24px 4px;
  color: var(--ink-soft);
}

.pr-tracks {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
}

.pr-track a {
  display: grid;
  gap: 8px;
  height: 100%;
  padding: 16px;
  border: 1px solid var(--ink);
  background: var(--bg);
  color: var(--ink);
  text-decoration: none;
  box-shadow: var(--shadow-hard);
  transition: transform var(--motion-press) var(--ease-out), box-shadow var(--motion-press) var(--ease-out);
}

.pr-track a:hover {
  transform: translate(-2px, -2px);
  box-shadow: var(--shadow-hard-lg);
}

.pr-track-name {
  font-family: var(--font-display);
  font-size: 1.6rem;
  line-height: 1;
  text-transform: uppercase;
  color: var(--blueprint);
}

.pr-track-sum {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.pr-track-meta {
  display: grid;
  gap: 6px;
  align-self: end;
  color: var(--ink-mute);
}

.pr-track-meta-wide {
  max-width: 360px;
  margin-block-start: 18px;
}

.pr-meter {
  display: block;
  height: 6px;
  border: 1px solid var(--rule);
  overflow: hidden;
}

.pr-meter > span {
  display: block;
  height: 100%;
  background: var(--pr-pass);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--motion-enter) var(--ease-out);
}

.pr-how ul {
  margin: 16px 0 0;
  padding-inline-start: 20px;
  max-width: 820px;
}

.pr-how li + li {
  margin-block-start: 6px;
}

.pr-crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 10px;
  margin: 0 0 14px;
  padding: 0;
  list-style: none;
  color: var(--ink-mute);
}

.pr-crumbs li + li::before {
  content: "/";
  margin-inline-end: 10px;
}

.pr-crumbs a {
  color: var(--ink-soft);
}

.pr-other {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-block-start: 28px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.pr-other > span {
  color: var(--ink-mute);
  align-self: center;
}

.pr-step-n {
  color: var(--blueprint);
  font-weight: 700;
  margin-block-start: 3px;
}

.pr-prob-head {
  padding-block-end: 18px;
  border-block-end: 1px solid var(--rule);
}

.pr-prob-head h1 {
  font-size: clamp(min(2rem, 10vw), 4.4vw, 3.2rem);
  margin-block-end: 12px;
}

.pr-prob-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  margin: 0;
  color: var(--ink-mute);
}

.pr-prob-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.pr-prob-links a {
  color: var(--blueprint);
}

.pr-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr);
  gap: 32px;
  margin-block-start: 24px;
  align-items: start;
}

.pr-left,
.pr-right {
  min-width: 0;
}

.pr-right {
  position: sticky;
  top: calc(var(--header-offset) - 8px);
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - var(--header-offset));
}

.pr-statement h2 {
  font-size: 1.5rem;
  margin: 26px 0 10px;
}

.pr-statement p,
.pr-statement li {
  max-width: 68ch;
}

.pr-statement p,
.pr-statement ul,
.pr-statement ol {
  margin: 0 0 12px;
}

.pr-statement table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.pr-statement th,
.pr-statement td {
  padding: 6px 8px;
  border: 1px solid var(--rule-soft);
  text-align: left;
  vertical-align: top;
}

.pr-statement .table-wrap {
  overflow-x: auto;
}

.pr-page pre {
  position: relative;
  margin: 10px 0;
  padding: 12px 14px;
  overflow-x: auto;
  background: var(--code-bg);
  border: 1px solid var(--rule-soft);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.5;
}

.pr-page pre code {
  font-size: inherit;
  overflow-wrap: normal;
}

.pr-page .code-lang {
  position: absolute;
  top: 4px;
  right: 56px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.pr-page .code-copy {
  position: absolute;
  top: 2px;
  right: 4px;
  padding: 2px 6px;
  border: 1px solid var(--rule-soft);
  background: var(--bg);
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  cursor: pointer;
}

.pr-page .syn-keyword { color: var(--blueprint); font-weight: 500; }
.pr-page .syn-string { color: var(--pr-medium); }
.pr-page .syn-number { color: var(--blueprint); }
.pr-page .syn-comment { color: var(--ink-mute); font-style: italic; }

.pr-panel {
  margin-block-start: 28px;
  padding: 16px;
  border: 1px solid var(--rule);
}

.pr-panel-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-block-end: 8px;
}

.pr-panel-head h2 {
  font-size: 1.4rem;
}

.pr-panel-count,
.pr-lock {
  color: var(--ink-mute);
}

.pr-lock[data-open] {
  color: var(--pr-pass);
}

.pr-hint-list {
  list-style: none;
  margin: 0 0 12px;
  padding: 0;
}

.pr-hint {
  padding: 10px 12px;
  margin-block-end: 10px;
  border-inline-start: 3px solid var(--blueprint);
  background: var(--blueprint-tint);
}

.pr-hint:focus {
  outline: 2px solid var(--blueprint);
}

.pr-hint p {
  margin: 0;
}

.pr-hint-n {
  color: var(--blueprint);
  font-weight: 700;
  margin-block-end: 4px !important;
}

.pr-locked-note {
  margin: 0;
  color: var(--ink-soft);
}

.pr-solution h3 {
  font-size: 1.1rem;
  margin: 14px 0 6px;
}

.pr-flash {
  animation: pr-flash 1.2s var(--ease-out);
}

@keyframes pr-flash {
  from { box-shadow: 0 0 0 4px var(--pr-pass); }
  to { box-shadow: 0 0 0 0 transparent; }
}

.pr-local summary,
.pr-keys summary {
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
}

.pr-work {
  display: flex;
  flex-direction: column;
  min-height: 0;
  max-height: 100%;
  border: 1px solid var(--ink);
  background: var(--bg);
  box-shadow: var(--shadow-hard);
}

.pr-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  padding: 8px 10px;
  border-block-end: 1px solid var(--ink);
}

.pr-toolbar-title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink);
  text-transform: uppercase;
}

.pr-runtime {
  flex: 1 1 auto;
  min-width: 0;
  color: var(--ink-mute);
  text-transform: none;
  letter-spacing: 0.02em;
}

.pr-runtime[data-phase="ready"] {
  color: var(--pr-pass);
}

.pr-toolbar-actions {
  display: flex;
  gap: 8px;
}

.pr-editor {
  position: relative;
  flex: 0 0 auto;
  height: min(46vh, 460px);
  min-height: 220px;
  background: var(--pr-editor-bg);
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.55;
  tab-size: 4;
}

.pr-editor-view,
.pr-editor-input {
  position: absolute;
  inset: 0;
  margin: 0;
  padding: 12px 14px;
  border: 0;
  font: inherit;
  line-height: inherit;
  letter-spacing: 0;
  white-space: pre;
  word-wrap: normal;
  overflow: auto;
  tab-size: 4;
}

.pr-page .pr-editor-view {
  position: absolute;
  inset: 0;
  margin: 0;
  padding: 12px 14px;
  font-size: inherit;
  line-height: inherit;
  background: transparent;
  border: 0;
  pointer-events: none;
  overflow: hidden;
  color: var(--ink);
}

.pr-editor-view code {
  font: inherit;
}

.pr-editor-input {
  width: 100%;
  height: 100%;
  resize: none;
  background: transparent;
  color: transparent;
  caret-color: var(--ink);
  outline: 0;
}

.pr-editor-input::selection {
  background: var(--blueprint-tint-strong);
  color: transparent;
}

.pr-editor-help {
  margin: 0;
  padding: 8px 12px 0;
  font-size: 0.85rem;
  color: var(--ink-mute);
}

.pr-mobile-note {
  display: none;
}

.pr-keys {
  padding: 6px 12px 10px;
  border-block-end: 1px solid var(--rule-soft);
}

.pr-keys dl {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 4px 14px;
  margin: 8px 0;
  font-size: 0.88rem;
}

.pr-keys dd {
  margin: 0;
}

.pr-keys p {
  margin: 0;
  font-size: 0.85rem;
  color: var(--ink-mute);
}

.pr-page kbd {
  display: inline-block;
  padding: 0 5px;
  border: 1px solid var(--rule);
  border-block-end-width: 2px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.pr-results {
  position: relative;
  flex: 1 1 auto;
  min-height: 120px;
  overflow: auto;
  padding: 12px;
}

.pr-results-empty {
  margin: 0;
  color: var(--ink-mute);
  font-size: 0.92rem;
}

.pr-running::after {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-inline-start: 8px;
  border: 2px solid var(--blueprint);
  border-inline-end-color: transparent;
  border-radius: 50%;
  animation: pr-spin 0.8s linear infinite;
}

@keyframes pr-spin {
  to { transform: rotate(360deg); }
}

.pr-verdict {
  margin: 0 0 12px;
  padding: 10px 12px;
  border-inline-start: 4px solid var(--ink-mute);
}

.pr-verdict-pass {
  border-color: var(--pr-pass);
  background: var(--pr-pass-tint);
}

.pr-verdict-run {
  border-color: var(--blueprint);
  background: var(--blueprint-tint);
}

.pr-verdict-fail {
  border-color: var(--pr-fail);
  background: var(--pr-fail-tint);
}

.pr-layer + .pr-layer {
  margin-block-start: 12px;
}

.pr-layer h3 {
  display: flex;
  justify-content: space-between;
  margin: 0 0 4px;
  color: var(--ink);
}

.pr-layer h3 span {
  color: var(--ink-mute);
}

.pr-layer ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

.pr-res {
  border-block-end: 1px solid var(--rule-soft);
}

.pr-res summary {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 8px;
  padding: 7px 2px;
  cursor: pointer;
  list-style: none;
}

.pr-res summary::-webkit-details-marker {
  display: none;
}

.pr-res-mark {
  align-self: center;
  font-weight: 700;
}

.pr-res-pass .pr-res-mark { color: var(--pr-pass); }
.pr-res-fail .pr-res-mark,
.pr-res-error .pr-res-mark { color: var(--pr-fail); }
.pr-res-skip .pr-res-mark { color: var(--ink-mute); }

.pr-res-name {
  font-size: 0.94rem;
}

.pr-res details > :not(summary) {
  margin-inline-start: 72px;
}

.pr-res-msg {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--pr-fail);
}

.pr-res-io > span,
.pr-res-why > span,
.pr-res-out > span {
  display: block;
  color: var(--ink-mute);
}

.pr-res-io pre,
.pr-res-out pre {
  margin: 2px 0 8px;
  padding: 6px 8px;
  font-size: 0.8rem;
  white-space: pre;
}

.pr-res-why {
  margin: 0 0 10px;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.pr-res-load {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--pr-fail);
}

.pr-pager {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-block-start: 36px;
  padding-block-start: 14px;
  border-block-start: 1px solid var(--rule);
}

.pr-pager a {
  color: var(--blueprint);
}

.pr-site-foot {
  max-width: 1240px;
  margin: 0 auto;
  padding: 18px 24px 40px;
  border-block-start: 1px solid var(--rule-soft);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-mute);
}

.pr-site-foot .footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-block-end: 8px;
}

.pr-site-foot a {
  color: var(--ink-soft);
}

.pr-kind {
  display: inline-block;
  padding: 0 6px;
  border: 1px solid currentColor;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.pr-kind-implement { color: var(--blueprint); }
.pr-kind-research { color: #7a3fc8; }
.pr-kind-train { color: var(--pr-easy); }
.pr-kind-lab { color: var(--pr-medium); }

[data-theme="dark"] .pr-kind-research { color: #b49cff; }

.pr-kinds {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.pr-kinds li {
  padding: 12px;
  border: 1px solid var(--rule-soft);
}

.pr-kinds a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  text-decoration: none;
}

.pr-kinds-n {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-mute);
}

.pr-kinds p {
  margin: 8px 0 0;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.pr-cite {
  margin: 18px 0 0;
  padding-block-start: 10px;
  border-block-start: 1px solid var(--rule-soft);
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.pr-cite span {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.pr-support summary {
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
}

.pr-support-code {
  max-height: 360px;
}

.pr-problem[data-kind="train"] .pr-editor {
  height: min(34vh, 340px);
}

.pr-curve {
  flex: 0 0 auto;
  margin: 0;
  padding: 8px 12px;
  border-block-end: 1px solid var(--rule-soft);
  color: var(--pr-pass);
}

.pr-curve figcaption {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.pr-curve svg {
  display: block;
  width: 100%;
  height: 90px;
  margin-block-start: 4px;
  background: var(--code-bg);
}

@media (max-width: 900px) {
  .pr-layout {
    display: flex;
    flex-direction: column;
    gap: 0;
  }

  .pr-left {
    display: contents;
  }

  .pr-statement,
  .pr-panel,
  .pr-right {
    min-width: 0;
    max-width: 100%;
  }

  .pr-statement { order: 0; }
  .pr-right { order: 1; margin-block-start: 24px; }
  .pr-hints { order: 2; }
  .pr-solution { order: 3; }
  .pr-local { order: 4; }

  .pr-right {
    position: static;
    max-height: none;
  }

  .pr-work {
    max-height: none;
  }

  .pr-results {
    max-height: 70vh;
  }

  .pr-left {
    order: 1;
  }
}

@media (max-width: 640px) {
  .pr-page {
    padding: 88px 16px 40px;
  }

  .pr-chips {
    flex-wrap: wrap;
  }

  .pr-row {
    grid-template-columns: 18px minmax(0, 1fr);
  }

  .pr-track-step {
    grid-template-columns: 26px 18px minmax(0, 1fr);
  }

  .pr-row-side {
    grid-column: 2 / -1;
    display: flex;
    gap: 12px;
    justify-items: start;
  }

  .pr-track-step .pr-row-side {
    grid-column: 3 / -1;
  }

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

  .pr-stats div {
    border-block-end: 1px solid var(--rule-soft);
  }

  .pr-editor {
    height: 360px;
    font-size: 13px;
  }

  .pr-mobile-note {
    display: inline;
  }

  .pr-toolbar-actions {
    width: 100%;
  }

  .pr-toolbar-actions .pr-btn {
    flex: 1 1 0;
  }

  .pr-res details > :not(summary) {
    margin-inline-start: 0;
  }

  .pr-pager {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  .pr-btn,
  .pr-track a,
  .pr-meter > span {
    transition: none;
  }

  .pr-flash,
  .pr-running::after {
    animation: none;
  }
}