:root {
  color-scheme: light;
  --bg: #f7f8f5;
  --paper: #ffffff;
  --panel: rgba(255, 255, 255, 0.86);
  --soft-panel: rgba(255, 255, 255, 0.68);
  --topbar: rgba(247, 248, 245, 0.9);
  --ink: #151714;
  --body-text: #353a32;
  --muted: #62685f;
  --faint: #e3e5dd;
  --line: #d5d9cf;
  --teal: #007a70;
  --teal-dark: #005b54;
  --amber: #b86d00;
  --red: #a13b2d;
  --green: #28754a;
  --shadow: 0 18px 44px rgba(28, 33, 26, 0.08);
  --grid-line: rgba(21, 23, 20, 0.035);
  --bg-glow: rgba(0, 122, 112, 0.08);
  --score-bg: #f1f7f5;
  --deep-bg: #fbfcfa;
  --tag-bg: #ffffff;
  --source-bg: #eef8f6;
  --radius: 8px;
  --max: 1180px;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #10120f;
  --paper: #171b16;
  --panel: rgba(23, 27, 22, 0.9);
  --soft-panel: rgba(23, 27, 22, 0.72);
  --topbar: rgba(16, 18, 15, 0.92);
  --ink: #eff3eb;
  --body-text: #dde6d8;
  --muted: #c3cabe;
  --faint: #2a3129;
  --line: #384034;
  --teal: #42d0bf;
  --teal-dark: #7ee1d5;
  --amber: #f0aa4d;
  --red: #f17b6d;
  --green: #70d69b;
  --shadow: 0 20px 54px rgba(0, 0, 0, 0.36);
  --grid-line: rgba(239, 243, 235, 0.045);
  --bg-glow: rgba(66, 208, 191, 0.12);
  --score-bg: #172722;
  --deep-bg: #141914;
  --tag-bg: #151914;
  --source-bg: #142622;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px) 0 0 / 56px 56px,
    linear-gradient(180deg, var(--bg-glow), transparent 310px),
    var(--bg);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-shell {
  min-height: 100vh;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px max(24px, calc((100vw - var(--max)) / 2));
  border-bottom: 1px solid rgba(21, 23, 20, 0.1);
  background: var(--topbar);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  background: var(--ink);
  color: #fff;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
}

:root[data-theme="dark"] .brand-mark {
  color: #10120f;
}

.brand strong {
  display: block;
  font-size: 16px;
  letter-spacing: 0;
}

.brand small {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 14px;
}

.nav-links a {
  padding: 8px 10px;
  border-radius: 6px;
}

.nav-links a:hover,
.theme-toggle:hover {
  background: rgba(0, 122, 112, 0.08);
  color: var(--teal-dark);
}

.theme-toggle {
  min-height: 38px;
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--soft-panel);
  color: var(--muted);
  font: inherit;
  font-size: 14px;
  cursor: pointer;
}

.app {
  width: min(var(--max), calc(100vw - 40px));
  margin: 0 auto;
  padding: 38px 0 72px;
}

.app:focus {
  outline: none;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.9fr);
  gap: 30px;
  align-items: stretch;
  margin-bottom: 34px;
}

.hero-copy {
  padding: 42px 0 16px;
}

.hero h1 {
  max-width: 720px;
  margin: 0;
  font-size: clamp(42px, 6vw, 80px);
  line-height: 0.98;
  font-weight: 820;
  letter-spacing: 0;
}

.hero p {
  max-width: 620px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.hero-panel,
.article-card,
.side-panel,
.method-card,
.opportunity-card,
.source-strip {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
}

.hero-panel {
  display: grid;
  align-content: space-between;
  min-height: 380px;
  padding: 24px;
  overflow: hidden;
}

.hero-panel-link {
  color: inherit;
  text-decoration: none;
  transition:
    border-color 160ms ease,
    transform 160ms ease,
    background 160ms ease;
}

.hero-panel-link:hover {
  border-color: var(--teal);
  background: var(--paper);
  transform: translateY(-2px);
}

.signal-map {
  display: grid;
  gap: 10px;
}

.signal-row {
  display: grid;
  grid-template-columns: 112px 1fr 52px;
  gap: 12px;
  align-items: center;
  color: var(--muted);
  font-size: 13px;
}

.signal-bar {
  height: 10px;
  border-radius: 99px;
  background: var(--faint);
  overflow: hidden;
}

.signal-bar span {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--teal);
}

.panel-title {
  margin: 0 0 18px;
  font-size: 15px;
  font-weight: 780;
}

.winner {
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.winner h2 {
  margin: 0;
  font-size: 30px;
  line-height: 1.14;
  letter-spacing: 0;
}

.winner p {
  margin: 14px 0 0;
  color: var(--muted);
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  margin-top: 18px;
  padding: 8px 12px;
  border-radius: 7px;
  background: var(--teal);
  color: var(--paper);
  font-size: 13px;
  font-weight: 820;
}

:root[data-theme="dark"] .hero-cta {
  color: #10120f;
}

.layout {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  gap: 26px;
  align-items: start;
}

.archive-rail {
  position: sticky;
  top: 95px;
  display: grid;
  gap: 12px;
}

.rail-title {
  color: var(--muted);
  font-size: 12px;
  font-weight: 760;
  text-transform: uppercase;
}

.date-link {
  display: block;
  min-height: 92px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--soft-panel);
}

.date-link:hover,
.date-link.is-active {
  border-color: var(--teal);
  background: var(--paper);
}

.date-link strong {
  display: block;
  font-size: 14px;
}

.date-link span {
  display: -webkit-box;
  overflow: hidden;
  color: var(--muted);
  font-size: 11.5px;
  line-height: 1.45;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.content-stack {
  display: grid;
  gap: 18px;
}

#articleList {
  display: grid;
  gap: 18px;
}

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 4px;
}

.search {
  width: min(360px, 100%);
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  color: var(--ink);
  font: inherit;
  font-size: 14px;
}

.article-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 170px;
  gap: 24px;
  padding: 24px;
}

.article-card h2 {
  margin: 0;
  font-size: 26px;
  line-height: 1.2;
}

.article-card p {
  margin: 12px 0 0;
  color: var(--muted);
}

.source-links {
  margin-top: 18px;
  display: grid;
  gap: 10px;
}

.source-links strong {
  font-size: 13px;
  color: var(--muted);
}

.source-link-list {
  max-width: 760px;
  padding-left: 0;
}

.source-links.is-compact {
  margin-top: 14px;
}

.source-links.is-compact .source-link-list {
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 8px 16px;
}

.source-links.is-compact .source-item {
  min-width: 0;
}

.source-links.is-compact .source-list a {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
  color: var(--muted);
  font-size: 13px;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 3px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--tag-bg);
  color: var(--muted);
  font-size: 12px;
}

.opp-source-link {
  display: inline-grid;
  grid-template-columns: 38px minmax(0, 1fr);
  align-items: center;
  width: 136px;
  min-height: 32px;
  padding: 4px 8px 4px 6px;
  border: 1px solid rgba(0, 122, 112, 0.28);
  border-radius: 7px;
  background: var(--source-bg);
  color: var(--teal-dark);
  font-size: 12px;
  line-height: 1.15;
  text-decoration: none;
  transition:
    border-color 160ms ease,
    transform 160ms ease,
    background 160ms ease;
}

.opp-source-link:hover {
  border-color: var(--teal);
  background: var(--paper);
  transform: translateY(-1px);
}

.opp-source-link span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 20px;
  border-radius: 999px;
  background: var(--teal);
  color: var(--paper);
  font-size: 10px;
  font-weight: 820;
}

.opp-source-link strong {
  min-width: 0;
  overflow: hidden;
  padding-left: 7px;
  font-size: 12px;
  font-weight: 720;
  text-overflow: ellipsis;
  white-space: nowrap;
}

:root[data-theme="dark"] .opp-source-link span {
  color: #10120f;
}

.detail-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 88px;
  min-height: 32px;
  padding: 4px 10px;
  border: 1px solid var(--teal);
  border-radius: 7px;
  background: var(--teal);
  color: var(--paper);
  font-size: 12px;
  font-weight: 820;
  text-decoration: none;
}

:root[data-theme="dark"] .detail-link {
  color: #10120f;
}

.score-stack {
  display: grid;
  gap: 8px;
  align-self: start;
}

.score-box {
  padding: 10px;
  border-left: 3px solid var(--teal);
  background: var(--score-bg);
}

.score-box strong {
  display: block;
  font-size: 22px;
  line-height: 1;
}

.score-box span {
  color: var(--muted);
  font-size: 12px;
}

.article-page {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 28px;
  align-items: start;
}

.article-body {
  min-width: 0;
}

.article-head {
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line);
}

.article-head h1 {
  max-width: 850px;
  margin: 0;
  font-size: clamp(38px, 5vw, 66px);
  line-height: 1.04;
  letter-spacing: 0;
}

.lead {
  max-width: 780px;
  color: var(--muted);
  font-size: 19px;
}

.back-link {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--teal-dark);
  font-size: 14px;
  font-weight: 760;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.deep-dive-head h1 {
  max-width: 900px;
}

.detail-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  max-width: 640px;
  margin: 22px 0 0;
}

.detail-metrics div,
.thesis-panel,
.phase-card,
.research-grid div,
.plan-list div {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.detail-metrics div {
  padding: 14px;
  border-left: 3px solid var(--teal);
}

.detail-metrics strong {
  display: block;
  font-size: 30px;
  line-height: 1;
}

.detail-metrics span {
  color: var(--muted);
  font-size: 12px;
}

.thesis-panel {
  max-width: 860px;
  margin-top: 22px;
  padding: 18px;
}

.thesis-panel strong {
  color: var(--teal-dark);
  font-size: 13px;
}

.thesis-panel p {
  margin: 8px 0 0;
  color: var(--body-text);
  font-size: 17px;
}

.article-section {
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}

.article-section h2 {
  margin: 0 0 16px;
  font-size: 30px;
  line-height: 1.16;
}

.article-section h3 {
  margin: 22px 0 8px;
  font-size: 19px;
}

.article-section p,
.article-section li {
  color: var(--body-text);
  font-size: 16px;
}

:root[data-theme="dark"] .lead,
:root[data-theme="dark"] .article-card p,
:root[data-theme="dark"] .winner p,
:root[data-theme="dark"] .date-link span,
:root[data-theme="dark"] .method-card p,
:root[data-theme="dark"] .article-section p,
:root[data-theme="dark"] .article-section li,
:root[data-theme="dark"] .deep-grid p {
  color: #eef6ea !important;
}

.article-section ul {
  margin: 0;
  padding-left: 20px;
}

.research-section > p {
  max-width: 850px;
  margin: 0 0 14px;
}

.mvp-timeline,
.plan-list {
  display: grid;
  gap: 14px;
}

.phase-card,
.plan-list div {
  padding: 18px;
}

.phase-card span {
  display: inline-flex;
  margin-bottom: 8px;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--source-bg);
  color: var(--teal-dark);
  font-size: 12px;
  font-weight: 800;
}

.phase-card h3,
.plan-list strong {
  margin: 0;
  font-size: 20px;
}

.phase-card p,
.plan-list p {
  margin: 8px 0 0;
}

.phase-card ul {
  display: grid;
  gap: 7px;
  margin-top: 12px;
}

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

.research-grid div {
  padding: 16px;
}

.research-grid strong {
  display: block;
  font-size: 17px;
}

.research-grid span {
  display: inline-flex;
  margin: 8px 0;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--source-bg);
  color: var(--teal-dark);
  font-size: 12px;
  font-weight: 760;
}

.research-grid p {
  margin: 0;
}

.opportunity-grid {
  display: grid;
  gap: 16px;
}

.opportunity-card {
  padding: 22px;
}

.opportunity-card header {
  position: relative;
  display: block;
  margin-bottom: 16px;
  padding-right: 132px;
}

.opportunity-card h3 {
  margin: 0;
  max-width: 100%;
  font-size: 24px;
  line-height: 1.2;
}

.verdict {
  position: absolute;
  top: 0;
  right: 0;
  width: 118px;
  padding: 6px 9px;
  border-radius: 6px;
  background: #edf8f5;
  color: var(--teal-dark);
  font-size: 12px;
  font-weight: 760;
  text-align: center;
  white-space: nowrap;
}

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

.deep-grid div {
  padding: 14px;
  border: 1px solid var(--faint);
  border-radius: var(--radius);
  background: var(--deep-bg);
}

.deep-grid strong {
  display: block;
  margin-bottom: 5px;
  font-size: 13px;
}

.deep-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.side-panel {
  position: sticky;
  top: 95px;
  padding: 18px;
}

.side-panel h2 {
  margin: 0 0 14px;
  font-size: 18px;
}

.side-panel ol {
  display: grid;
  gap: 10px;
  margin: 0;
  padding-left: 21px;
}

.side-panel a,
.toc-button {
  color: var(--teal-dark);
}

.toc-button {
  margin: 0;
  padding: 0;
  border: 0;
  background: transparent;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.toc-button:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}

.side-panel .source-links {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.side-panel .source-links strong {
  color: var(--ink);
}

.side-panel .source-link-list {
  max-width: none;
}

.side-panel .source-list a {
  display: block;
  overflow-wrap: anywhere;
  font-size: 14px;
  line-height: 1.4;
}

.side-panel hr {
  margin: 18px 0;
  border: 0;
  border-top: 1px solid var(--line);
}

.source-strip {
  padding: 18px;
}

.source-strip h2 {
  margin: 0 0 12px;
  font-size: 18px;
}

.source-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.source-list a {
  color: var(--teal-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.source-item {
  display: grid;
  gap: 4px;
}

.source-type {
  width: fit-content;
  padding: 2px 7px;
  border-radius: 999px;
  background: var(--source-bg);
  color: var(--teal-dark);
  font-size: 12px;
  font-weight: 760;
}

.source-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.method-card {
  padding: 22px;
}

.method-card h2 {
  margin: 0 0 10px;
  font-size: 20px;
}

.method-card p {
  margin: 0;
  color: var(--muted);
}

.empty {
  padding: 40px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  text-align: center;
}

@media (max-width: 920px) {
  .hero,
  .layout,
  .article-page,
  .method-grid {
    grid-template-columns: 1fr;
  }

  .archive-rail,
  .side-panel {
    position: static;
  }

  .archive-rail {
    display: flex;
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .date-link {
    min-width: 170px;
  }
}

@media (max-width: 680px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 20px;
  }

  .nav-links {
    width: 100%;
    overflow-x: auto;
  }

  .app {
    width: min(100vw - 28px, var(--max));
    padding-top: 24px;
  }

  .hero-copy {
    padding-top: 16px;
  }

  .article-head h1 {
    font-size: 40px;
    line-height: 1.08;
    overflow-wrap: anywhere;
  }

  .hero h1 {
    font-size: 42px;
    line-height: 1.04;
  }

  .lead {
    font-size: 17px;
  }

  .article-card,
  .deep-grid,
  .research-grid {
    grid-template-columns: 1fr;
  }

  .detail-metrics {
    grid-template-columns: 1fr;
  }

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

  .opportunity-card header {
    padding-right: 0;
  }

  .verdict {
    position: static;
    display: inline-block;
    width: auto;
    margin-top: 12px;
  }

  .opp-source-link {
    width: min(100%, 170px);
  }
}