:root {
  --bg: #f6f8fa;
  --bg-subtle: #eef2f6;
  --panel: #ffffff;
  --panel-muted: #f6f8fa;
  --panel-strong: #f0f4f8;
  --border: #d0d7de;
  --border-strong: #b6c2cf;
  --text: #1f2328;
  --text-soft: #57606a;
  --text-faint: #6e7781;
  --accent: #0969da;
  --accent-strong: #0550ae;
  --accent-soft: #ddf4ff;
  --success: #1a7f37;
  --success-soft: #dafbe1;
  --warn: #9a6700;
  --warn-soft: #fff8c5;
  --focus: #0969da;
  --shadow: 0 1px 0 rgba(31, 35, 40, 0.04), 0 10px 32px rgba(31, 35, 40, 0.08);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --page-max: 1600px;
  --sidebar-width: 248px;
  --detail-width: 468px;
  --detail-width-expanded: 760px;
  --body-font: "IBM Plex Sans", "Segoe UI", sans-serif;
  --heading-font: "IBM Plex Sans", "Segoe UI", sans-serif;
  --mono-font: "Cascadia Mono", Consolas, monospace;
}

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

html,
body {
  height: 100%;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(9, 105, 218, 0.04), transparent 24%),
    linear-gradient(180deg, #fbfcfe 0%, var(--bg) 100%);
  color: var(--text);
  font-family: var(--body-font);
  line-height: 1.55;
}

body[data-solution-open="true"] {
  overflow: hidden;
}

a {
  color: var(--accent-strong);
}

button,
input,
select,
textarea {
  font: inherit;
}

button,
input,
select,
textarea,
[tabindex="0"] {
  outline-offset: 3px;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
a:focus-visible,
[tabindex="0"]:focus-visible {
  outline: 2px solid var(--focus);
}

img,
svg {
  display: block;
  max-width: 100%;
}

.skip-link {
  position: absolute;
  top: -48px;
  left: 12px;
  z-index: 100;
  padding: 0.6rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--panel);
}

.skip-link:focus {
  top: 12px;
}

.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  gap: 18px;
  max-width: var(--page-max);
  margin: 0 auto;
  padding: 18px;
  min-height: 100vh;
}

.sidebar,
.topbar,
.overview-main,
.roadmap-panel,
.catalog-pane,
.detail-pane,
.topic-shell,
.topic-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.sidebar {
  display: grid;
  align-content: start;
  gap: 14px;
  padding: 16px;
  position: sticky;
  top: 18px;
  height: calc(100vh - 36px);
  overflow: auto;
  box-shadow: 0 1px 0 rgba(31, 35, 40, 0.03), 0 6px 24px rgba(31, 35, 40, 0.05);
}

.sidebar-head {
  padding-bottom: 2px;
}

.sidebar-kicker,
.section-kicker {
  margin: 0 0 0.35rem;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.sidebar h1,
.topbar h2,
.section-head h2,
.pane-head h2,
.detail-title,
.topic-card h1,
.topic-card h2,
.topic-card h3 {
  margin: 0;
  font-family: var(--heading-font);
  line-height: 1.18;
  letter-spacing: -0.02em;
}

.sidebar h1 {
  font-size: 1.55rem;
}

.sidebar-copy,
.pane-copy,
.summary-copy,
.roadmap-copy p,
.topic-summary,
.topic-card p,
.topic-card li,
.phase-copy,
.detail-note {
  color: var(--text-soft);
}

.sidebar-section {
  display: grid;
  gap: 10px;
  padding-top: 2px;
}

.section-head h2 {
  font-size: 1rem;
}

.nav-stack,
.token-wrap,
.active-filter-bar,
.recommendation-grid,
.guide-grid,
.resource-list,
.featured-strip,
.phase-groups,
.detail-content,
.detail-grid,
.repo-grid,
.source-list,
.topic-link-row,
.problem-meta,
.detail-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.nav-stack {
  flex-direction: column;
}

.sidebar-button,
.guide-link,
.button,
.token,
.mini-link,
.row-action,
.inline-link,
.copy-button {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--panel);
  color: var(--text);
  text-decoration: none;
  cursor: pointer;
  transition: border-color 0.18s ease, background-color 0.18s ease, transform 0.18s ease,
    box-shadow 0.18s ease;
}

.sidebar-button:hover,
.guide-link:hover,
.button:hover,
.token:hover,
.mini-link:hover,
.row-action:hover,
.inline-link:hover,
.copy-button:hover {
  border-color: var(--border-strong);
  transform: translateY(-1px);
}

.sidebar-button {
  display: grid;
  gap: 4px;
  text-align: left;
  padding: 10px 12px;
  border-radius: 8px;
  background: transparent;
  box-shadow: none;
}

.sidebar-button strong,
.guide-link strong {
  font-size: 0.95rem;
}

.sidebar-button span,
.guide-link span {
  color: var(--text-soft);
  font-size: 0.84rem;
}

.sidebar-button[data-active="true"] {
  border-color: rgba(9, 105, 218, 0.28);
  background: linear-gradient(90deg, rgba(9, 105, 218, 0.12), rgba(9, 105, 218, 0.02));
  color: var(--accent-strong);
}

.guide-link {
  display: grid;
  gap: 4px;
  padding: 10px 12px;
  background: rgba(255, 255, 255, 0.84);
}

.sidebar-details {
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--panel-muted);
}

.sidebar-details summary {
  cursor: pointer;
  font-weight: 600;
}

.filter-group {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.filter-group h3 {
  margin: 0;
  font-size: 0.92rem;
}

.token-wrap {
  gap: 6px;
}

.token {
  padding: 0.34rem 0.62rem;
  font-size: 0.8rem;
  border-radius: 999px;
  background: var(--panel);
}

.token[data-active="true"] {
  border-color: rgba(9, 105, 218, 0.42);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.sidebar-metrics {
  display: grid;
  gap: 10px;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.metric-box {
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(246, 248, 250, 0.92), rgba(255, 255, 255, 0.98));
}

.metric-box span {
  display: block;
  color: var(--text-faint);
  font-size: 0.8rem;
}

.metric-box strong {
  display: block;
  margin-top: 4px;
  font-size: 1.25rem;
}

.main-shell {
  display: grid;
  align-content: start;
  gap: 12px;
  min-width: 0;
}

.topbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  padding: 14px 18px;
  box-shadow: 0 1px 0 rgba(31, 35, 40, 0.03);
}

.topbar h2 {
  font-size: 1.15rem;
}

.topbar-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.search-field input,
.control-select,
.note-box textarea {
  min-height: 40px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--panel);
  color: var(--text);
}

.search-field input {
  width: 260px;
  padding: 0.65rem 0.8rem;
}

.control-select {
  padding: 0.55rem 0.7rem;
}

.button,
.mini-link,
.row-action,
.inline-link,
.copy-button {
  padding: 0.58rem 0.8rem;
}

.button-primary {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
}

.button-quiet {
  color: var(--text-soft);
}

.overview-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 248px;
  gap: 12px;
  align-items: start;
}

.overview-main,
.catalog-pane,
.detail-pane,
.topic-shell,
.topic-card,
.roadmap-panel {
  padding: 16px;
}

.overview-main {
  display: grid;
  gap: 12px;
  border-top: 3px solid rgba(9, 105, 218, 0.18);
}

.section-head,
.pane-head,
.repo-header,
.topic-header-row {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 12px;
}

.section-head.compact {
  align-items: center;
}

.toggle-line {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.checkbox-inline {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  color: var(--text-soft);
}

.recommendation-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(260px, 0.9fr);
  gap: 10px;
}

.recommendation-card,
.summary-card,
.featured-card,
.phase-group,
.catalog-helper-card,
.detail-block,
.resource-group,
.repo-card,
.note-box,
.topic-mini-card,
.topic-card section {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--panel-muted);
}

.recommendation-card,
.summary-card,
.featured-card,
.phase-group,
.catalog-helper-card,
.detail-block,
.resource-group,
.repo-card,
.note-box,
.topic-mini-card {
  padding: 14px;
}

.recommendation-primary {
  display: grid;
  gap: 12px;
  background: linear-gradient(135deg, #ffffff 0%, #f7fbff 80%);
  border-color: rgba(9, 105, 218, 0.18);
}

.recommendation-secondary-list {
  display: grid;
  gap: 10px;
}

.recommendation-secondary {
  display: grid;
  gap: 8px;
  align-content: start;
}

.recommendation-main-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: start;
}

.recommendation-summary {
  font-size: 0.97rem;
  color: var(--text);
}

.recommendation-rationale {
  display: grid;
  gap: 6px;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid rgba(9, 105, 218, 0.12);
  background: rgba(9, 105, 218, 0.04);
  color: var(--text-soft);
}

.recommendation-rationale strong {
  color: var(--text);
}

.recommendation-label,
.featured-label {
  margin: 0 0 0.25rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-strong);
}

.recommendation-card h3,
.featured-card h3,
.phase-row h4,
.topic-mini-card h2,
.resource-group h3 {
  margin: 0;
  font-size: 1rem;
}

.recommendation-card p,
.featured-card p,
.phase-row p,
.detail-block p,
.repo-card p,
.topic-mini-card p {
  margin: 6px 0 0;
}

.overview-side {
  display: grid;
  gap: 10px;
  align-content: start;
}

.summary-card h3 {
  margin: 0;
  font-size: 1.15rem;
}

.guide-grid {
  display: grid;
  gap: 8px;
}

.summary-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(246, 248, 250, 0.96));
}

.topic-meta-grid,
.resource-group-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.resource-list {
  display: grid;
  gap: 10px;
}

.resource-list.compact {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.resource-card {
  display: grid;
  gap: 6px;
  padding: 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--panel);
  color: inherit;
  text-decoration: none;
}

.resource-card span {
  color: var(--text-soft);
  font-size: 0.9rem;
}

.solution-dialog[hidden] {
  display: none;
}

.solution-dialog {
  position: fixed;
  inset: 0;
  z-index: 200;
}

.solution-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.42);
  backdrop-filter: blur(6px);
}

.solution-panel {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 12px;
  width: min(1480px, calc(100vw - 32px));
  max-height: calc(100vh - 32px);
  margin: 16px auto;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--panel);
  box-shadow: 0 18px 64px rgba(15, 23, 42, 0.22);
}

.solution-panel-head,
.solution-code-toolbar {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: start;
}

.solution-status,
.solution-language-tabs,
.solution-source-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.solution-layout {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 14px;
  min-height: 0;
  align-items: start;
}

.solution-sidebar {
  display: grid;
  gap: 12px;
  align-content: start;
  min-height: 0;
  overflow: auto;
  padding-right: 4px;
}

.solution-code-shell {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  gap: 10px;
  min-height: 0;
  align-content: start;
}

.solution-code {
  height: 100%;
  min-height: 0;
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: #0d1117;
}

.solution-code-block {
  font-family: var(--mono-font);
  font-size: 0.84rem;
  line-height: 1.5;
  color: #e6edf3;
}

.code-line-wrap {
  border-bottom: 1px solid rgba(240, 246, 252, 0.04);
}

.code-line-wrap.has-annotation {
  background: rgba(9, 105, 218, 0.08);
}

.code-line-row {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 12px;
  padding: 0.22rem 0.8rem;
}

.code-line-number {
  color: #7d8590;
  text-align: right;
  user-select: none;
}

.code-line-text {
  white-space: pre;
  overflow-x: auto;
}

.code-annotation {
  display: grid;
  gap: 4px;
  padding: 0.55rem 0.9rem 0.75rem 4.8rem;
  border-top: 1px dashed rgba(240, 246, 252, 0.08);
  background: rgba(13, 17, 23, 0.7);
}

.code-annotation strong {
  color: #f0f6fc;
  font-size: 0.78rem;
}

.code-annotation span {
  color: #c9d1d9;
}

.source-tab {
  min-width: 220px;
}

.roadmap-panel {
  display: grid;
  gap: 12px;
  border-top: 3px solid rgba(9, 105, 218, 0.18);
}

.roadmap-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  align-items: start;
}

.roadmap-copy {
  margin: 0.45rem 0 0;
  color: var(--text-soft);
}

.roadmap-context {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: flex-end;
  align-self: start;
}

.roadmap-context-chip {
  display: grid;
  gap: 2px;
  min-width: 108px;
  padding: 0.58rem 0.74rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #ffffff;
  text-align: left;
  cursor: pointer;
}

.roadmap-context-chip strong {
  font-size: 0.82rem;
}

.roadmap-context-chip span {
  font-size: 0.76rem;
  color: var(--text-soft);
}

.roadmap-context-chip[data-active="true"] {
  border-color: rgba(9, 105, 218, 0.28);
  background: linear-gradient(180deg, rgba(9, 105, 218, 0.08), rgba(9, 105, 218, 0.02));
}

.roadmap-shell {
  position: relative;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background:
    linear-gradient(180deg, rgba(9, 105, 218, 0.02), transparent 28%),
    var(--panel-muted);
}

.roadmap-svg {
  width: 100%;
  min-height: 340px;
}

.roadmap-tooltip {
  position: absolute;
  z-index: 10;
  max-width: 280px;
  padding: 0.75rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--panel);
  box-shadow: var(--shadow);
  pointer-events: none;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--detail-width);
  gap: 12px;
  min-width: 0;
}

body[data-detail-expanded="true"] .workspace {
  grid-template-columns: minmax(320px, 0.78fr) minmax(620px, var(--detail-width-expanded));
}

.catalog-pane,
.detail-pane {
  display: grid;
  gap: 12px;
  min-width: 0;
  align-content: start;
}

.catalog-pane {
  border-top: 3px solid rgba(9, 105, 218, 0.2);
}

.detail-pane {
  border-top: 3px solid rgba(9, 105, 218, 0.28);
}

.pane-tools {
  display: flex;
  gap: 8px;
  align-items: center;
}

.catalog-scroll,
.detail-scroll {
  min-height: 0;
  max-height: calc(100vh - 222px);
  overflow: auto;
  padding-right: 4px;
}

.catalog-scroll {
  border-top: 1px solid var(--border);
  padding-top: 12px;
}

.featured-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.featured-card {
  background: linear-gradient(180deg, #ffffff 0%, #f6f8fa 100%);
}

.phase-groups {
  display: grid;
  gap: 14px;
  align-content: start;
  align-items: start;
  grid-auto-rows: max-content;
}

.phase-group {
  display: grid;
  gap: 12px;
  position: relative;
  padding-left: 18px;
  background: transparent;
  border: none;
  box-shadow: none;
  align-content: start;
}

.phase-group::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 8px;
  width: 3px;
  border-radius: 999px;
  background: linear-gradient(180deg, rgba(9, 105, 218, 0.18), rgba(9, 105, 218, 0.02));
}

.phase-group[data-active="true"]::before {
  background: linear-gradient(180deg, rgba(9, 105, 218, 0.9), rgba(9, 105, 218, 0.18));
}

.catalog-helper-card {
  display: grid;
  gap: 10px;
  background: linear-gradient(180deg, #ffffff 0%, #f6f8fa 100%);
}

.catalog-helper-card h3 {
  margin: 0;
  font-size: 1rem;
}

.phase-group-head {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.phase-group-head h3 {
  margin: 0;
  font-size: 1.02rem;
}

.phase-stats {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.phase-group-tools {
  display: grid;
  gap: 8px;
  justify-items: end;
}

.stat-pill,
.meta-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0.18rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #ffffff;
  color: var(--text-soft);
  font-size: 0.75rem;
}

.phase-list {
  display: grid;
  gap: 8px;
}

.phase-row {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
  padding: 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: #ffffff;
  cursor: pointer;
  transition: border-color 0.18s ease, background-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.phase-row:hover {
  border-color: var(--border-strong);
  transform: translateY(-1px);
}

.phase-row[data-selected="true"] {
  border-color: rgba(9, 105, 218, 0.55);
  background: linear-gradient(180deg, #f6fbff 0%, #edf5ff 100%);
  box-shadow: inset 4px 0 0 var(--accent), 0 10px 24px rgba(9, 105, 218, 0.08);
}

.phase-row[data-solved="true"] {
  background: #f2fbf5;
}

.phase-row[data-compact="true"] {
  padding-block: 10px;
}

.row-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--panel-muted);
  color: var(--text-soft);
  font-family: var(--mono-font);
  font-size: 0.82rem;
  font-weight: 600;
}

.phase-row[data-selected="true"] .row-number {
  border-color: rgba(9, 105, 218, 0.35);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.row-head {
  display: flex;
  align-items: baseline;
  gap: 8px;
  flex-wrap: wrap;
}

.row-id {
  color: var(--text-faint);
  font-family: var(--mono-font);
  font-size: 0.8rem;
}

.row-meta {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 6px;
  color: var(--text-soft);
  font-size: 0.82rem;
}

.row-meta strong {
  color: var(--text);
}

.row-summary {
  color: var(--text-soft);
}

.row-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.row-action {
  min-width: 74px;
  text-align: center;
  padding: 0.45rem 0.65rem;
}

.row-action[data-active="true"] {
  border-color: rgba(26, 127, 55, 0.28);
  background: var(--success-soft);
  color: var(--success);
}

.detail-scroll {
  border-top: 1px solid var(--border);
  padding-top: 12px;
}

.detail-content {
  display: grid;
  gap: 16px;
}

.detail-header {
  display: grid;
  gap: 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.detail-title {
  font-size: 1.72rem;
  line-height: 1.14;
}

.detail-path {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.detail-stage-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.26rem 0.6rem;
  border-radius: 999px;
  background: rgba(9, 105, 218, 0.08);
  color: var(--accent-strong);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.detail-path-copy {
  color: var(--text-soft);
  font-size: 0.9rem;
}

.detail-header-badges {
  justify-content: flex-start;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
}

.detail-section {
  display: grid;
  gap: 6px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

.detail-block h3,
.repo-card h3 {
  margin: 0;
  font-size: 0.95rem;
}

.detail-emphasis {
  padding: 14px 16px;
  border: 1px solid rgba(9, 105, 218, 0.16);
  border-left: 4px solid var(--accent);
  border-radius: 10px;
  background: linear-gradient(180deg, rgba(9, 105, 218, 0.07), rgba(9, 105, 218, 0.02));
}

.detail-stage-section,
.detail-solution-summary {
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: linear-gradient(180deg, rgba(246, 248, 250, 0.82), rgba(255, 255, 255, 0.98));
}

.solution-section-head,
.inline-solution-head,
.solution-spoiler-toolbar {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: start;
}

.inline-solution-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.inline-solution-list {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

.inline-solution-card {
  display: grid;
  gap: 10px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: #ffffff;
}

.inline-solution-card h4 {
  margin: 0;
  font-size: 0.98rem;
}

.inline-solution-card p {
  margin: 0;
}

.inline-solution-note {
  color: var(--text-soft);
}

.solution-spoiler-inline {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: linear-gradient(180deg, #ffffff, #f8fafc);
  overflow: hidden;
}

.solution-spoiler-inline summary {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  padding: 0.85rem 0.95rem;
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}

.solution-spoiler-inline summary::-webkit-details-marker {
  display: none;
}

.solution-spoiler-inline summary small {
  color: var(--text-soft);
  font-weight: 500;
}

.solution-spoiler-inline[open] summary {
  border-bottom: 1px solid var(--border);
  background: rgba(9, 105, 218, 0.03);
}

.solution-spoiler-body {
  display: grid;
  gap: 12px;
  padding: 14px;
}

.solution-spoiler-meta {
  display: grid;
  gap: 2px;
}

.solution-spoiler-links {
  margin-top: -2px;
}

.solution-spoiler-disclaimer {
  display: grid;
  gap: 4px;
  padding: 10px 12px;
  border: 1px solid rgba(9, 105, 218, 0.12);
  border-radius: 8px;
  background: rgba(9, 105, 218, 0.05);
}

.solution-inline-code .solution-code-block {
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.repo-footnote {
  color: var(--text-soft);
  font-size: 0.84rem;
}

.repo-grid {
  display: grid;
  gap: 10px;
}

.repo-card ul,
.topic-card ul,
.topic-card ol {
  margin: 0;
  padding-left: 1.1rem;
}

.source-list,
.topic-link-row,
.detail-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.meta-pill {
  background: #ffffff;
}

.meta-pill.accent {
  background: var(--accent-soft);
  color: var(--accent-strong);
  border-color: rgba(9, 105, 218, 0.18);
}

.meta-pill.success {
  background: var(--success-soft);
  color: var(--success);
  border-color: rgba(26, 127, 55, 0.18);
}

.meta-pill.warn {
  background: var(--warn-soft);
  color: var(--warn);
  border-color: rgba(154, 103, 0, 0.18);
}

.inline-link,
.mini-link,
.copy-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.note-box textarea {
  width: 100%;
  min-height: 130px;
  padding: 0.75rem 0.8rem;
  resize: vertical;
}

.empty-state {
  margin: 0;
  color: var(--text-soft);
}

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

.topic-shell {
  max-width: 1180px;
  margin: 24px auto;
  padding: 18px;
}

.topic-frame {
  display: grid;
  gap: 16px;
}

.topic-card {
  padding: 18px;
}

.topic-card section {
  margin-top: 14px;
  padding: 14px;
}

.topic-mini-card ul,
.topic-mini-card ol,
.resource-group ul,
.resource-group ol {
  margin: 0;
  padding-left: 1.1rem;
}

.topic-summary {
  font-size: 1rem;
}

.table-trace {
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: #ffffff;
}

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

th,
td {
  text-align: left;
  padding: 0.56rem 0.7rem;
  border-bottom: 1px solid var(--border);
}

pre {
  overflow-x: auto;
  margin: 0;
  padding: 0.95rem;
  border-radius: var(--radius-md);
  background: #0d1117;
  color: #e6edf3;
  font-family: var(--mono-font);
  font-size: 0.86rem;
  line-height: 1.45;
}

code {
  font-family: var(--mono-font);
}

@media (max-width: 1380px) {
  .workspace {
    grid-template-columns: minmax(0, 1fr) 380px;
  }
}

@media (max-width: 1180px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
    height: auto;
  }

  .overview-row,
  .workspace,
  .topbar,
  .roadmap-head,
  .recommendation-grid {
    grid-template-columns: 1fr;
  }

  body[data-detail-expanded="true"] .workspace {
    grid-template-columns: 1fr;
  }

  .catalog-scroll,
  .detail-scroll {
    max-height: none;
  }

  .solution-layout {
    grid-template-columns: 1fr;
  }

  .solution-panel {
    width: calc(100vw - 20px);
    max-height: calc(100vh - 20px);
    margin: 10px;
  }
}

@media (max-width: 860px) {
  .featured-strip,
  .detail-grid,
  .topic-meta-grid,
  .resource-group-grid {
    grid-template-columns: 1fr;
  }

  .solution-section-head,
  .inline-solution-head,
  .solution-spoiler-toolbar,
  .solution-spoiler-inline summary {
    flex-direction: column;
  }

  .topbar-actions {
    justify-content: stretch;
  }

  .search-field input {
    width: 100%;
  }

  .solution-panel-head,
  .solution-code-toolbar {
    flex-direction: column;
  }
}

@media (max-width: 680px) {
  .app-shell {
    padding: 12px;
  }

  .sidebar,
  .topbar,
  .overview-main,
  .roadmap-panel,
  .catalog-pane,
  .detail-pane,
  .topic-shell,
  .topic-card {
    padding: 14px;
  }

  .phase-row {
    grid-template-columns: 1fr;
  }

  .row-actions {
    flex-direction: row;
  }

  .code-line-row {
    grid-template-columns: 42px minmax(0, 1fr);
    gap: 8px;
    padding: 0.22rem 0.55rem;
  }

  .code-annotation {
    padding-left: 3.4rem;
  }
}