.duo-page {
  --duo-blue: #8abdd0;
  --duo-yellow: #e6c36a;
  --duo-red: #e17b68;
  overflow-x: clip;
}

.duo-hero {
  border-bottom: 1px solid var(--line-strong);
  background:
    radial-gradient(circle at 82% 18%, rgb(112 223 165 / 14%), transparent 30rem),
    linear-gradient(135deg, rgb(7 25 20 / 96%), rgb(6 15 13 / 99%));
}

.duo-hero-grid {
  min-height: 590px;
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, .55fr);
  gap: clamp(40px, 8vw, 120px);
  align-items: end;
  padding-top: clamp(88px, 12vw, 150px);
  padding-bottom: clamp(64px, 8vw, 108px);
}

.duo-hero h1 {
  max-width: 920px;
  margin: 18px 0 26px;
  font-family: var(--display);
  font-size: clamp(58px, 9vw, 132px);
  font-weight: 520;
  line-height: .92;
  letter-spacing: -.06em;
}

.duo-lede {
  max-width: 720px;
  margin: 0;
  color: var(--muted-strong);
  font-size: clamp(18px, 2vw, 25px);
  line-height: 1.65;
}

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

.duo-hero-actions a {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  padding: 0 20px;
  border: 1px solid var(--line-strong);
  color: var(--text);
  text-decoration: none;
  font-weight: 760;
}

.duo-hero-actions a:first-child {
  border-color: var(--accent);
  background: var(--accent);
  color: var(--bg);
}

.duo-hero-note {
  border-top: 3px solid var(--accent);
  padding-top: 22px;
}

.duo-hero-note span,
.duo-hero-note strong {
  display: block;
}

.duo-hero-note span {
  margin-bottom: 18px;
  color: var(--accent);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .16em;
}

.duo-hero-note strong {
  font-family: var(--display);
  font-size: clamp(31px, 3.2vw, 48px);
  font-weight: 500;
  line-height: 1.16;
}

.duo-hero-note p {
  margin: 18px 0 0;
  color: var(--muted);
  line-height: 1.75;
}

.duo-main {
  padding-bottom: 40px;
}

.duo-jump {
  position: sticky;
  z-index: 12;
  top: 0;
  display: flex;
  gap: 6px;
  margin: 0 calc(var(--shell-padding) * -1);
  padding: 10px var(--shell-padding);
  overflow-x: auto;
  border-bottom: 1px solid var(--line);
  background: rgb(6 17 14 / 94%);
  backdrop-filter: blur(14px);
  scrollbar-width: none;
}

.duo-jump::-webkit-scrollbar { display: none; }

.duo-jump a {
  min-height: 42px;
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  padding: 0 14px;
  color: var(--muted-strong);
  text-decoration: none;
  font-size: 13px;
  font-weight: 720;
}

.duo-jump a:hover,
.duo-jump a:focus-visible {
  background: var(--panel-soft);
  color: var(--accent);
}

.duo-section {
  scroll-margin-top: 80px;
  padding: clamp(64px, 9vw, 116px) 0;
  border-bottom: 1px solid var(--line);
}

.duo-section-heading {
  max-width: 860px;
  margin-bottom: 38px;
}

.duo-section-heading h2 {
  margin: 10px 0 16px;
  font-family: var(--display);
  font-size: clamp(42px, 6vw, 78px);
  font-weight: 520;
  line-height: 1.04;
  letter-spacing: -.045em;
}

.duo-section-heading > p:last-child,
.split-heading > p {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}

.duo-infographic-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(22px, 3vw, 38px);
}

.duo-infographic-grid .infographic-card {
  border-color: rgb(112 223 165 / 42%);
}

.split-heading {
  max-width: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, .65fr);
  gap: clamp(32px, 7vw, 100px);
  align-items: end;
}

.promise-grid,
.call-grid,
.resource-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border: 1px solid var(--line-strong);
}

.promise-grid article,
.call-grid article,
.resource-grid article {
  min-width: 0;
  padding: clamp(22px, 3vw, 34px);
  border-right: 1px solid var(--line);
}

.promise-grid article:last-child,
.call-grid article:last-child,
.resource-grid article:last-child { border-right: 0; }

.promise-grid span,
.call-grid span {
  color: var(--accent);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .12em;
}

.promise-grid h3,
.call-grid h3,
.resource-grid h3 {
  margin: 28px 0 12px;
  font-size: 20px;
  line-height: 1.35;
}

.promise-grid p,
.call-grid p,
.resource-grid p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.scaling-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.scaling-grid article {
  min-width: 0;
  padding: clamp(24px, 4vw, 42px);
  border: 1px solid var(--line-strong);
  background: var(--panel-soft);
}

.scaling-grid span,
.scaling-grid strong { display: block; }

.scaling-grid span {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .12em;
}

.scaling-grid strong {
  margin: 18px 0;
  color: var(--accent);
  font-family: var(--display);
  font-size: clamp(42px, 5vw, 72px);
  font-weight: 500;
}

.scaling-grid p {
  margin: 0;
  color: var(--muted-strong);
  line-height: 1.7;
}

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

.duo-act {
  min-width: 0;
  border: 1px solid var(--line-strong);
  background: linear-gradient(180deg, rgb(112 223 165 / 7%), transparent 46%);
}

.duo-act header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 22px;
  border-bottom: 1px solid var(--line);
  color: var(--accent);
  font-family: var(--mono);
}

.duo-act header p { margin: 0; }
.duo-act h3 { margin: 30px 28px 14px; font-size: 25px; }
.duo-act > p { margin: 0 28px 26px; color: var(--muted); line-height: 1.78; }

.duo-act ul {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.duo-act li {
  position: relative;
  padding: 14px 22px 14px 46px;
  border-bottom: 1px solid var(--line);
  color: var(--muted-strong);
  line-height: 1.55;
}

.duo-act li:last-child { border-bottom: 0; }
.duo-act li::before { content: "✓"; position: absolute; left: 22px; color: var(--accent); }

.route-study {
  display: grid;
  grid-template-columns: minmax(260px, .7fr) minmax(0, 1.3fr);
  border: 1px solid var(--line-strong);
  background: linear-gradient(120deg, rgb(112 223 165 / 9%), transparent 55%);
}

.route-study > div:first-child {
  padding: clamp(24px, 4vw, 42px);
  border-right: 1px solid var(--line-strong);
}

.route-study > div:first-child span,
.route-study > div:first-child strong { display: block; }
.route-study > div:first-child span { color: var(--accent); font-family: var(--mono); font-size: 12px; }
.route-study > div:first-child strong { margin-top: 18px; font-size: clamp(25px, 3vw, 38px); line-height: 1.28; }
.route-study > div:first-child p { margin: 18px 0 0; color: var(--muted); line-height: 1.7; }
.route-study > div:first-child a { min-height: 44px; display: inline-flex; align-items: center; margin-top: 14px; color: var(--accent); text-decoration: none; font-family: var(--mono); font-size: 11px; }

.route-sample {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.route-sample article {
  display: flex;
  min-width: 0;
  flex-direction: column;
  justify-content: center;
  gap: 10px;
  padding: clamp(24px, 4vw, 42px);
  border-right: 1px solid var(--line);
}

.route-sample article:last-child { border-right: 0; }
.route-sample strong { margin-bottom: 8px; color: var(--duo-yellow); font-size: 19px; }
.route-sample span { color: var(--muted-strong); line-height: 1.5; }

.elite-gates {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 18px;
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line-strong);
}

.elite-gates article {
  min-width: 0;
  display: flex;
  flex-direction: column;
  padding: clamp(22px, 3vw, 30px);
  border-right: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
}

.elite-gates article > span { color: var(--duo-yellow); font-family: var(--mono); font-size: 12px; }
.elite-gates h3 { margin: 22px 0 12px; font-size: 20px; line-height: 1.4; }
.elite-gates p { margin: 0 0 24px; color: var(--muted); line-height: 1.7; }
.elite-gates a,
.resource-grid a,
.relic-note a,
.pairing-list a,
.role-evidence {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  margin-top: auto;
  color: var(--accent);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 11px;
}

.draw-audit {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr)) auto;
  gap: 0;
  margin-top: 18px;
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--duo-red);
  background: rgb(225 123 104 / 6%);
}

.draw-audit > div { padding: 24px 28px; border-right: 1px solid var(--line); }
.draw-audit span,
.draw-audit strong { display: block; }
.draw-audit span { color: var(--duo-red); font-size: 12px; font-weight: 780; }
.draw-audit strong { margin-top: 12px; font-size: 19px; }
.draw-audit p { margin: 10px 0 0; color: var(--muted); line-height: 1.7; }
.draw-audit > a {
  min-width: 170px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  color: var(--duo-red);
  text-align: center;
  text-decoration: none;
  font-size: 12px;
  font-weight: 780;
}

.combat-example {
  display: grid;
  grid-template-columns: minmax(180px, .35fr) minmax(0, 1fr);
  gap: 24px;
  margin-top: 18px;
  padding: 24px 30px;
  border-left: 3px solid var(--duo-yellow);
  background: rgb(230 195 106 / 7%);
}

.combat-example > span {
  color: var(--duo-yellow);
  font-weight: 800;
}

.combat-example ol {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin: 0;
  padding: 0;
  counter-reset: order;
  list-style: none;
}

.combat-example li { color: var(--muted-strong); line-height: 1.55; }
.combat-example li::before { counter-increment: order; content: counter(order) "  "; color: var(--duo-yellow); font-family: var(--mono); }

.coop-card-groups {
  display: grid;
  gap: 24px;
}

.coop-card-group {
  --tone: var(--accent);
  border: 1px solid var(--line-strong);
}

.coop-card-group.tone-good { --tone: var(--duo-blue); }
.coop-card-group.tone-watch { --tone: var(--duo-yellow); }
.coop-card-group.tone-stop { --tone: var(--duo-red); }

.coop-card-group > header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 24px;
  border-bottom: 1px solid var(--line-strong);
  background: color-mix(in srgb, var(--tone) 8%, transparent);
}

.coop-card-group h3 { margin: 0; color: var(--tone); font-size: 19px; }
.coop-card-group > header span { color: var(--tone); font-family: var(--mono); }

.coop-card-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.coop-card-list a {
  min-width: 0;
  min-height: 190px;
  display: flex;
  flex-direction: column;
  padding: 24px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: var(--text);
  text-decoration: none;
}

.coop-card-list a:nth-child(3n) { border-right: 0; }
.coop-card-list a:nth-last-child(-n + 3) { border-bottom: 0; }
.coop-card-list a:hover,
.coop-card-list a:focus-visible { background: color-mix(in srgb, var(--tone) 7%, transparent); }
.coop-card-list strong { color: var(--tone); font-size: 20px; }
.coop-card-list p { margin: 12px 0 24px; color: var(--muted-strong); line-height: 1.7; }
.coop-card-list span { margin-top: auto; color: var(--muted); font-family: var(--mono); font-size: 11px; line-height: 1.5; }

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

.duo-role {
  min-width: 0;
  border: 1px solid var(--line-strong);
  background: var(--panel-soft);
}

.duo-role > header {
  display: flex;
  gap: 18px;
  align-items: center;
  padding: 24px 28px;
  border-bottom: 1px solid var(--line);
}

.duo-role > header > span { color: var(--accent); font-family: var(--mono); }
.duo-role h3 { margin: 0; font-family: var(--display); font-size: 32px; font-weight: 520; }
.duo-role header p { margin: 4px 0 0; color: var(--accent); font-size: 13px; }
.duo-role-intro { margin: 0; padding: 24px 28px; color: var(--muted-strong); line-height: 1.78; }

.duo-role dl { margin: 0; border-top: 1px solid var(--line); }
.duo-role dl div { display: grid; grid-template-columns: 130px minmax(0, 1fr); border-bottom: 1px solid var(--line); }
.duo-role dt,
.duo-role dd { margin: 0; padding: 14px 18px; line-height: 1.65; }
.duo-role dt { color: var(--muted); font-size: 13px; font-weight: 760; }
.duo-role dd { border-left: 1px solid var(--line); color: var(--muted-strong); }

.duo-role details { border-bottom: 1px solid var(--line); }
.duo-role summary { min-height: 48px; display: flex; align-items: center; padding: 0 28px; color: var(--accent); cursor: pointer; font-weight: 760; }
.duo-role ol { margin: 0; padding: 0 28px 22px 54px; color: var(--muted-strong); }
.duo-role li { margin-top: 10px; line-height: 1.65; }
.duo-role .role-evidence { margin: 0 28px 18px; }

.duo-role footer { display: flex; gap: 18px; justify-content: space-between; align-items: center; padding: 18px 28px; }
.duo-role footer div { display: flex; flex-wrap: wrap; gap: 6px; }
.duo-role footer span { padding: 5px 8px; background: rgb(112 223 165 / 10%); color: var(--muted-strong); font-size: 12px; }
.duo-role footer a { min-height: 44px; display: inline-flex; flex: 0 0 auto; align-items: center; color: var(--accent); text-decoration: none; font-weight: 760; }

.resource-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.resource-grid article { display: flex; flex-direction: column; }
.resource-grid article > span { color: var(--duo-yellow); font-family: var(--mono); font-size: 12px; }
.resource-grid article:last-child { border-right: 0; }

.pairing-guide {
  display: grid;
  grid-template-columns: minmax(260px, .45fr) minmax(0, 1.55fr);
  margin-top: 18px;
  border: 1px solid var(--line-strong);
}

.pairing-intro { padding: clamp(26px, 4vw, 42px); border-right: 1px solid var(--line-strong); }
.pairing-intro h3 { margin: 12px 0 18px; font-family: var(--display); font-size: 38px; font-weight: 520; }
.pairing-intro > p:last-child { margin: 0; color: var(--muted); line-height: 1.75; }

.pairing-list { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
.pairing-list article { min-width: 0; display: flex; flex-direction: column; padding: 26px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.pairing-list article:nth-child(2n) { border-right: 0; }
.pairing-list article:nth-last-child(-n + 2) { border-bottom: 0; }
.pairing-list article > span { color: var(--duo-yellow); font-size: 12px; font-weight: 780; }
.pairing-list article.pairing-steady > span { color: var(--accent); }
.pairing-list h4 { margin: 14px 0 10px; font-size: 19px; line-height: 1.45; }
.pairing-list p { margin: 0 0 18px; color: var(--muted); line-height: 1.7; }

.relic-note {
  display: grid;
  grid-template-columns: minmax(220px, .4fr) minmax(0, 1fr) auto;
  gap: 28px;
  align-items: center;
  margin-top: 18px;
  padding: 24px 28px;
  border-left: 3px solid var(--accent);
  background: rgb(112 223 165 / 7%);
}

.relic-note strong { font-size: 19px; line-height: 1.5; }
.relic-note p { margin: 0; color: var(--muted); line-height: 1.7; }
.relic-note a { white-space: nowrap; }

.advanced-note {
  margin-top: 18px;
  border: 1px solid var(--line-strong);
}

.advanced-note summary {
  min-height: 56px;
  display: flex;
  align-items: center;
  padding: 0 22px;
  color: var(--muted-strong);
  cursor: pointer;
  font-weight: 760;
}

.advanced-note div { padding: 0 22px 20px; color: var(--muted); line-height: 1.75; }

.duo-sources {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line-strong);
  border-left: 1px solid var(--line-strong);
}

.duo-sources a {
  min-width: 0;
  min-height: 180px;
  display: flex;
  flex-direction: column;
  padding: 22px;
  border-right: 1px solid var(--line-strong);
  border-bottom: 1px solid var(--line-strong);
  color: var(--text);
  text-decoration: none;
}

.duo-sources a:hover,
.duo-sources a:focus-visible { background: var(--panel-soft); }
.duo-sources span { color: var(--accent); font-size: 12px; }
.duo-sources strong { margin-top: 10px; line-height: 1.45; }
.duo-sources p { margin: 10px 0 18px; color: var(--muted); line-height: 1.6; }
.duo-sources small { margin-top: auto; color: var(--muted); font-family: var(--mono); }

.duo-footer { margin-top: 0; }

@media (max-width: 1100px) {
  .duo-hero-grid { grid-template-columns: minmax(0, 1fr) minmax(250px, .55fr); }
  .promise-grid,
  .call-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .promise-grid article:nth-child(2),
  .call-grid article:nth-child(2) { border-right: 0; }
  .promise-grid article:nth-child(-n + 2),
  .call-grid article:nth-child(-n + 2) { border-bottom: 1px solid var(--line); }
  .coop-card-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .coop-card-list a:nth-child(3n) { border-right: 1px solid var(--line); }
  .coop-card-list a:nth-child(2n) { border-right: 0; }
  .coop-card-list a:nth-last-child(-n + 3) { border-bottom: 1px solid var(--line); }
  .coop-card-list a:nth-last-child(-n + 2) { border-bottom: 0; }
  .elite-gates,
  .resource-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .elite-gates article:nth-child(2n),
  .resource-grid article:nth-child(2n) { border-right: 0; }
  .resource-grid article:nth-child(-n + 2) { border-bottom: 1px solid var(--line); }
}

@media (max-width: 820px) {
  .duo-hero-grid,
  .split-heading { grid-template-columns: minmax(0, 1fr); }
  .duo-hero-grid { min-height: 0; align-items: start; gap: 50px; }
  .duo-hero-note { max-width: 560px; }
  .scaling-grid,
  .duo-acts,
  .duo-roles,
  .resource-grid,
  .duo-sources { grid-template-columns: minmax(0, 1fr); }
  .resource-grid article { border-right: 0; border-bottom: 1px solid var(--line); }
  .resource-grid article:last-child { border-bottom: 0; }
  .combat-example { grid-template-columns: minmax(0, 1fr); }
  .combat-example ol { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .route-study,
  .pairing-guide,
  .draw-audit,
  .relic-note { grid-template-columns: minmax(0, 1fr); }
  .route-study > div:first-child,
  .pairing-intro,
  .draw-audit > div { border-right: 0; border-bottom: 1px solid var(--line); }
  .draw-audit > a { min-height: 56px; }
  .relic-note { gap: 14px; }
  .duo-infographic-grid {
    width: min(100%, 864px);
    margin-inline: auto;
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 560px) {
  .duo-hero-grid { padding-top: 70px; padding-bottom: 60px; }
  .duo-hero h1 { font-size: clamp(50px, 16vw, 72px); }
  .duo-lede { font-size: 17px; }
  .duo-hero-actions a { width: 100%; justify-content: center; }
  .duo-jump {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
    overflow: visible;
    padding-top: 6px;
    padding-bottom: 6px;
  }

  .duo-jump a {
    min-width: 0;
    min-height: 44px;
    justify-content: center;
    padding: 0 4px;
    font-size: 12px;
  }
  .promise-grid,
  .call-grid,
  .coop-card-list,
  .elite-gates,
  .resource-grid,
  .pairing-list { grid-template-columns: minmax(0, 1fr); }
  .promise-grid article,
  .call-grid article,
  .coop-card-list a,
  .coop-card-list a:nth-child(2n),
  .coop-card-list a:nth-child(3n) { border-right: 0; border-bottom: 1px solid var(--line); }
  .promise-grid article:last-child,
  .call-grid article:last-child,
  .coop-card-list a:last-child { border-bottom: 0; }
  .elite-gates article,
  .elite-gates article:nth-child(2n),
  .resource-grid article,
  .resource-grid article:nth-child(2n),
  .pairing-list article,
  .pairing-list article:nth-child(2n) { border-right: 0; border-bottom: 1px solid var(--line); }
  .elite-gates article:last-child,
  .resource-grid article:last-child,
  .pairing-list article:last-child { border-bottom: 0; }
  .route-sample { grid-template-columns: minmax(0, 1fr); }
  .route-sample article { border-right: 0; border-bottom: 1px solid var(--line); }
  .route-sample article:last-child { border-bottom: 0; }
  .duo-section-heading h2 { font-size: 42px; }
  .combat-example ol { grid-template-columns: minmax(0, 1fr); }
  .duo-role > header,
  .duo-role-intro,
  .duo-role footer { padding-left: 20px; padding-right: 20px; }
  .duo-role dl div { grid-template-columns: minmax(0, 1fr); }
  .duo-role dd { padding-top: 0; border-left: 0; }
  .duo-role footer { align-items: flex-start; flex-direction: column; }
  .duo-role footer a { width: 100%; }
  .duo-sources a { min-height: 0; }
}

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