:root {
  --ink: #10211d;
  --muted: #5d6b66;
  --line: #d9e0dc;
  --paper: #f4f6f3;
  --white: #fff;
  --mint: #8ed8cc;
  --teal: #137f73;
  --teal-dark: #0c625a;
  --coral: #db6b57;
  --amber: #d29a45;
  --radius: 18px;
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 20;
  padding: 10px 14px;
  color: var(--white);
  background: var(--ink);
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  padding: 12px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid rgba(16, 33, 29, 0.12);
  background: rgba(244, 246, 243, 0.92);
  backdrop-filter: blur(16px);
}

.brand {
  display: flex;
  gap: 12px;
  align-items: center;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 12px;
  color: var(--ink);
  background: var(--mint);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

nav {
  display: flex;
  gap: clamp(14px, 2.4vw, 32px);
  align-items: center;
}

nav a {
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
  text-decoration: none;
}

nav a:hover,
nav a:focus-visible {
  color: var(--teal);
}

.nav-source {
  padding: 9px 14px;
  border: 1px solid var(--ink);
  border-radius: 999px;
}

.hero,
.section,
.metric-strip {
  width: min(1180px, calc(100% - 40px));
  margin-inline: auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(340px, 0.75fr);
  gap: clamp(40px, 8vw, 100px);
  align-items: center;
  min-height: 650px;
  padding: 92px 0 78px;
}

.eyebrow,
.card-kicker {
  margin: 0 0 18px;
  color: var(--teal);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.hero h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(42px, 6vw, 76px);
  line-height: 1.02;
  letter-spacing: -0.055em;
}

.hero h1 span {
  color: var(--teal);
}

.hero-lead {
  max-width: 670px;
  margin: 30px 0 0;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.75;
}

.hero-actions,
.cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  min-height: 46px;
  padding: 0 20px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--ink);
  border-radius: 10px;
  font-size: 14px;
  font-weight: 750;
  text-decoration: none;
  transition: transform 150ms ease, box-shadow 150ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 10px 22px rgba(16, 33, 29, 0.12);
}

.button-primary {
  color: var(--white);
  border-color: var(--teal);
  background: var(--teal);
}

.button-secondary {
  background: transparent;
}

.hero-note {
  max-width: 620px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.hero-panel {
  padding: 26px;
  border: 1px solid rgba(142, 216, 204, 0.25);
  border-radius: 24px;
  color: var(--white);
  background:
    radial-gradient(circle at 85% 5%, rgba(142, 216, 204, 0.2), transparent 36%),
    var(--ink);
  box-shadow: 0 28px 60px rgba(16, 33, 29, 0.18);
}

.panel-head {
  display: flex;
  justify-content: space-between;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.13);
  color: rgba(255, 255, 255, 0.64);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 11px;
  letter-spacing: 0.09em;
}

.status {
  color: var(--mint);
}

.status i {
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 6px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 0 5px rgba(142, 216, 204, 0.1);
}

.snapshot-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  margin: 22px 0;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.12);
}

.snapshot-grid div {
  padding: 18px;
  background: rgba(16, 33, 29, 0.72);
}

.snapshot-grid dt {
  margin-bottom: 7px;
  color: rgba(255, 255, 255, 0.52);
  font-size: 11px;
  text-transform: uppercase;
}

.snapshot-grid dd {
  margin: 0;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 14px;
  font-weight: 750;
}

.flow-mini {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  padding-top: 4px;
  color: rgba(255, 255, 255, 0.72);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 11px;
}

.flow-mini span {
  padding: 8px 10px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 7px;
}

.flow-mini b {
  color: var(--mint);
}

.metric-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 0 14px 36px rgba(16, 33, 29, 0.06);
}

.metric-strip article {
  padding: 26px;
}

.metric-strip article + article {
  border-left: 1px solid var(--line);
}

.metric-strip p {
  margin: 0 0 10px;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 10px;
  font-weight: 750;
  letter-spacing: 0.08em;
}

.metric-strip strong,
.metric-strip span {
  display: block;
}

.metric-strip strong {
  font-size: clamp(28px, 3vw, 40px);
  letter-spacing: -0.035em;
}

.metric-strip span {
  margin-top: 6px;
  color: var(--muted);
  font-size: 12px;
}

.section {
  padding: 120px 0;
}

.section-heading {
  display: flex;
  gap: 32px;
  align-items: end;
  justify-content: space-between;
  margin-bottom: 44px;
}

.section-heading h2,
.cta h2 {
  margin: 0;
  font-size: clamp(30px, 4.4vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.04em;
}

.metric-switch {
  display: flex;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--white);
}

.metric-switch button {
  min-height: 38px;
  padding: 0 14px;
  border: 0;
  border-radius: 7px;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  font: inherit;
  font-size: 12px;
  font-weight: 720;
}

.metric-switch button.is-active {
  color: var(--white);
  background: var(--ink);
}

.result-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  gap: 20px;
}

.chart-card,
.finding-card,
.evidence-grid article {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
}

.chart-card {
  padding: 28px;
}

.chart-head {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 11px;
}

.bar-chart {
  display: grid;
  gap: 24px;
  margin-top: 34px;
}

.bar-row {
  display: grid;
  grid-template-columns: 140px minmax(120px, 1fr) 62px;
  gap: 14px;
  align-items: center;
}

.bar-label {
  font-size: 13px;
  font-weight: 720;
}

.bar-track {
  height: 13px;
  overflow: hidden;
  border-radius: 999px;
  background: #e9eeeb;
}

.bar-fill {
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--teal);
  transition: width 420ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.bar-fill.is-best {
  background: var(--coral);
}

.bar-value {
  text-align: right;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 13px;
  font-weight: 800;
}

.finding-card {
  display: flex;
  padding: 30px;
  flex-direction: column;
}

.finding-card h3 {
  margin: 4px 0 14px;
  font-size: 26px;
  line-height: 1.2;
}

.finding-card > p:not(.card-kicker) {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.boundary {
  margin-top: auto;
  padding: 18px;
  border-left: 3px solid var(--amber);
  border-radius: 8px;
  background: #faf5eb;
}

.boundary strong,
.boundary span {
  display: block;
}

.boundary strong {
  margin-bottom: 6px;
  color: #7f5b24;
  font-size: 12px;
}

.boundary span {
  color: #695a43;
  font-size: 13px;
  line-height: 1.55;
}

.section-dark {
  width: 100%;
  padding-inline: max(20px, calc((100% - 1180px) / 2));
  color: var(--white);
  background: var(--ink);
}

.section-dark .eyebrow {
  color: var(--mint);
}

.section-summary {
  max-width: 430px;
  margin: 0;
  color: rgba(255, 255, 255, 0.62);
  line-height: 1.7;
}

.system-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin: 0;
  padding: 0;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.13);
  list-style: none;
}

.system-grid li {
  min-height: 250px;
  padding: 28px;
  background: var(--ink);
}

.system-grid li > span {
  color: var(--mint);
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 12px;
}

.system-grid h3 {
  margin: 56px 0 14px;
  font-size: 20px;
}

.system-grid p {
  margin: 0;
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
  line-height: 1.7;
}

.evidence-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.evidence-grid article {
  min-height: 220px;
  padding: 24px;
}

.evidence-tag {
  display: inline-flex;
  padding: 5px 8px;
  border-radius: 6px;
  color: var(--teal-dark);
  background: #e3f4f0;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.evidence-tag-warn {
  color: #7f5b24;
  background: #faf0dc;
}

.evidence-grid strong {
  display: block;
  margin: 30px 0 12px;
  font-size: 20px;
}

.evidence-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}

.cta {
  display: flex;
  gap: 30px;
  align-items: center;
  justify-content: space-between;
  margin-top: 90px;
  padding: 40px;
  border-radius: 22px;
  background: var(--mint);
}

.cta .eyebrow {
  color: var(--ink);
}

.cta h2 {
  max-width: 690px;
  font-size: clamp(28px, 4vw, 44px);
}

.cta-links {
  flex: 0 0 auto;
  margin: 0;
}

footer {
  display: flex;
  justify-content: space-between;
  padding: 26px clamp(20px, 5vw, 72px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 70px;
  }

  .hero-panel {
    max-width: 650px;
  }

  .metric-strip,
  .evidence-grid {
    grid-template-columns: 1fr 1fr;
  }

  .metric-strip article:nth-child(3) {
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .metric-strip article:nth-child(4) {
    border-top: 1px solid var(--line);
  }

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

  .finding-card {
    min-height: 330px;
  }

  .system-grid {
    grid-template-columns: 1fr 1fr;
  }

  .section-heading,
  .cta {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 620px) {
  .site-header {
    align-items: flex-start;
  }

  nav {
    max-width: 180px;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 10px 16px;
  }

  nav a:not(.nav-source) {
    display: none;
  }

  .hero,
  .section,
  .metric-strip {
    width: min(100% - 24px, 1180px);
  }

  .hero {
    padding-top: 54px;
  }

  .hero h1 {
    font-size: clamp(40px, 13vw, 58px);
  }

  .snapshot-grid,
  .metric-strip,
  .evidence-grid,
  .system-grid {
    grid-template-columns: 1fr;
  }

  .metric-strip article + article {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .section {
    padding-block: 84px;
  }

  .section-dark {
    width: 100%;
  }

  .section-heading {
    align-items: stretch;
  }

  .metric-switch {
    overflow-x: auto;
  }

  .metric-switch button {
    flex: 1 0 auto;
  }

  .chart-card {
    padding: 20px 16px;
  }

  .chart-head span:last-child {
    display: none;
  }

  .bar-row {
    grid-template-columns: 105px minmax(70px, 1fr) 52px;
    gap: 9px;
  }

  .bar-label {
    font-size: 11px;
  }

  .system-grid li {
    min-height: 220px;
  }

  .system-grid h3 {
    margin-top: 38px;
  }

  .cta {
    padding: 28px 22px;
  }

  footer {
    gap: 8px;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}