:root {
  --ink: #071d49;
  --red: #ed1634;
  --paper: #f4f7fb;
  --line: #cad5e6;
  --muted: #5d6980;
  --white: #fff;
  --max: 1180px;
  --text: 18px;
  --text-lg: 20px;
  --display: clamp(46px, 5vw, 68px);
  --heading: clamp(36px, 3.8vw, 50px);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
section[id] { scroll-margin-top: 86px; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, "Segoe UI", Arial, sans-serif;
  font-size: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; }
a:focus-visible { outline: 3px solid #ff667b; outline-offset: 4px; }
.skip-link { position: fixed; z-index: 100; top: 10px; left: 10px; padding: 10px 14px; color: var(--white); background: var(--ink); transform: translateY(-150%); text-decoration: none; }
.skip-link:focus { transform: translateY(0); }
.section-shell { width: min(var(--max), calc(100% - 48px)); margin-inline: auto; }

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 66px;
  padding: 0 max(24px, calc((100% - var(--max)) / 2));
  color: var(--white);
  background: var(--ink);
  background: color-mix(in srgb, var(--ink) 94%, transparent);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,.16);
}
.header-brand { display: flex; align-items: center; gap: 16px; min-width: 0; }
.agency-logo { display: flex; align-items: center; flex: 0 0 auto; }
.agency-logo img { width: 116px; height: auto; filter: brightness(0) invert(1); }
.brand-divider { width: 1px; height: 22px; background: rgba(255,255,255,.28); }
.case-type { color: #b8c6dc; font-size: 10px; font-weight: 850; letter-spacing: .1em; text-transform: uppercase; white-space: nowrap; }
.site-header nav { display: flex; gap: 28px; }
.site-header nav a { font-size: 14px; font-weight: 700; text-decoration: none; }
.site-header nav a:hover { color: #ff667b; }
.site-header .agency-site-link { padding-left: 28px; border-left: 1px solid rgba(255,255,255,.22); color: #b8c6dc; font-size: 12px; }

.hero {
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  align-items: center;
  min-height: 760px;
  padding-block: 76px;
  gap: 70px;
}
.eyebrow, .section-number, .mini-label {
  margin: 0 0 24px;
  color: var(--red);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .14em;
  text-transform: uppercase;
}
.hero h1 {
  max-width: 760px;
  margin: 0;
  font-size: var(--display);
  line-height: 1.02;
  letter-spacing: -.05em;
}
.lead { max-width: 650px; margin: 30px 0; color: var(--muted); font-size: 21px; line-height: 1.6; }
.hero-result { display: flex; align-items: center; gap: 22px; margin-top: 42px; }
.hero-result > div { display: flex; align-items: center; gap: 16px; }
.hero-result strong { color: var(--red); font-size: 58px; line-height: .85; letter-spacing: -.06em; }
.hero-result span { padding-left: 16px; font-size: 14px; font-weight: 800; line-height: 1.35; border-left: 1px solid var(--line); }
.hero-result i { color: var(--line); font-size: 25px; font-style: normal; font-weight: 300; }
.hero-visual { position: relative; margin: 0; }
.hero-visual::before { content: ""; position: absolute; inset: 9% -8% -8% 12%; z-index: -1; background: var(--red); }
.hero-visual picture { display: block; }
.hero-visual img { width: 100%; box-shadow: 0 28px 70px rgba(7,29,73,.2); }
.hero-visual figcaption { position: relative; z-index: 1; margin: 12px 0 0; padding: 12px 16px; color: var(--ink); background: var(--white); border-left: 3px solid var(--red); box-shadow: 0 10px 28px rgba(7,29,73,.1); font-size: 15px; font-weight: 650; line-height: 1.5; }

.context { padding-block: 110px; border-top: 1px solid var(--line); }
.context-grid, .summary-content { display: grid; grid-template-columns: 1fr 1fr; gap: 90px; }
h2 { margin: 0; font-size: var(--heading); line-height: 1.08; letter-spacing: -.045em; }
.context-grid p, .summary-content p { margin: 0 0 20px; color: var(--muted); font-size: var(--text-lg); line-height: 1.65; }

.approach { padding-block: 110px; }
.approach-heading { display: grid; grid-template-columns: 1.2fr .8fr; align-items: start; gap: 80px; }
.approach-heading > p { margin: 0; color: var(--muted); font-size: 19px; line-height: 1.65; }
.campaign-structure { display: flex; align-items: center; justify-content: center; gap: 26px; margin-top: 48px; padding: 18px 24px; color: var(--white); background: var(--ink); font-size: 14px; font-weight: 800; }
.campaign-structure strong { color: #ff667b; }
.campaign-structure i { color: #8296b5; font-size: 20px; font-style: normal; }
.hypothesis-grid { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 20px; border: 1px solid var(--line); }
.hypothesis-grid article { display: flex; flex-direction: column; min-height: 510px; padding: 28px; border-right: 1px solid var(--line); background: var(--white); }
.hypothesis-grid article:last-child { border-right: 0; }
.group-label { margin: 0; color: var(--muted); font-size: 10px; font-weight: 900; letter-spacing: .08em; }
.group-label span { margin-right: 6px; color: var(--red); font-size: 12px; }
.hypothesis-grid h3 { min-height: 58px; margin: 42px 0 20px; font-size: 22px; line-height: 1.2; letter-spacing: -.03em; }
.hypothesis-grid p { color: var(--muted); font-size: 16px; line-height: 1.6; }
.offer { min-height: 145px; padding: 16px; background: var(--paper); border-left: 3px solid var(--red); }
.offer b { display: block; margin-bottom: 7px; color: var(--red); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; }
.offer p { margin: 0; color: var(--ink); font-weight: 650; }
.motive { margin: 18px 0 24px; }
.motive b { color: var(--ink); }
.creative-set { display: inline-block; align-self: flex-start; margin-top: auto; padding: 8px 10px; color: var(--red); border: 1px solid #f0a1ad; font-size: 10px; font-weight: 900; letter-spacing: .04em; text-transform: uppercase; }
.targeting-card { display: grid; grid-template-columns: .8fr 1.2fr; gap: 60px; margin-top: 28px; padding: 54px; color: var(--white); background: var(--ink); }
.targeting-card h3 { max-width: 390px; margin: 0; font-size: 32px; line-height: 1.15; letter-spacing: -.04em; }
.targeting-intro { max-width: 390px; margin: 22px 0 0; color: #b8c6dc; font-size: 16px; line-height: 1.6; }
.targeting-card ol { margin: 0; padding: 0; list-style: none; }
.targeting-card li { display: grid; grid-template-columns: 170px 1fr; gap: 24px; padding: 18px 0; border-bottom: 1px solid rgba(255,255,255,.18); font-size: 16px; }
.targeting-card li span { color: #b8c6dc; font-size: 16px; line-height: 1.55; }
.targeting-card .geo-feature { margin-top: 12px; padding: 22px; background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.22); border-left: 3px solid var(--red); }
.geo-feature strong { font-size: 17px; line-height: 1.35; }
.geo-feature em { display: block; margin-bottom: 9px; color: #ff667b; font-size: 10px; font-style: normal; font-weight: 900; letter-spacing: .08em; text-transform: uppercase; }

.results { padding-block: 110px; color: var(--white); background: var(--ink); }
.section-number.light { color: #ff5c72; }
.results-heading { display: flex; align-items: end; justify-content: space-between; gap: 30px; }
.results-heading p { color: #a9bad5; font-size: 16px; }
.kpi-grid { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 58px; border-block: 1px solid rgba(255,255,255,.2); }
.kpi-grid article { min-height: 170px; padding: 30px 20px 26px 0; }
.kpi-grid strong { display: block; font-size: clamp(28px, 2.5vw, 38px); letter-spacing: -.045em; white-space: nowrap; }
.kpi-grid span { display: block; margin-top: 13px; color: #a9bad5; font-size: 15px; line-height: 1.45; }
.result-layers { display: grid; grid-template-columns: .9fr 1.1fr; gap: 22px; margin-top: 38px; }
.result-layer { padding: 36px; border: 1px solid rgba(255,255,255,.2); }
.result-layer h3 { max-width: 520px; margin: 0; font-size: 28px; line-height: 1.2; letter-spacing: -.035em; }
.lead-layer { background: rgba(255,255,255,.055); }
.engagement-layer { background: #102a5d; }
.aggregate-cr { display: flex; align-items: center; gap: 18px; margin-top: 30px; padding: 18px 20px; background: rgba(255,255,255,.065); border-left: 3px solid #ff5c72; }
.aggregate-cr strong { color: #ff5c72; font-size: 36px; line-height: 1; letter-spacing: -.05em; }
.aggregate-cr span { color: #d7e0ed; font-size: 14px; font-weight: 800; line-height: 1.35; }
.layer-metrics, .engagement-metrics { display: grid; margin-top: 22px; border-block: 1px solid rgba(255,255,255,.18); }
.layer-metrics { grid-template-columns: repeat(2, 1fr); }
.engagement-metrics { grid-template-columns: repeat(3, 1fr); }
.layer-metrics > div, .engagement-metrics > div { padding: 22px 16px 22px 0; }
.layer-metrics strong, .engagement-metrics strong { display: block; color: #ff5c72; font-size: 38px; line-height: 1; letter-spacing: -.05em; }
.layer-metrics span, .engagement-metrics span { display: block; margin-top: 10px; color: #d0d9e7; font-size: 14px; font-weight: 750; line-height: 1.45; }
.layer-copy { margin: 24px 0 0; color: #c4cfdf; font-size: 17px; line-height: 1.65; }

.insights { padding-block: 110px; }
.insights-intro { display: grid; grid-template-columns: 1.2fr .8fr; gap: 90px; align-items: end; }
.insights-intro p { margin: 0; color: var(--muted); font-size: 19px; line-height: 1.65; }
.analysis-flow { display: flex; align-items: center; justify-content: center; gap: 18px; margin-top: 48px; padding: 16px 22px; color: #b8c6dc; background: var(--ink); font-size: 12px; font-weight: 850; letter-spacing: .035em; text-transform: uppercase; }
.analysis-flow i { color: #ff667b; font-size: 17px; font-style: normal; }
.analysis-flow strong { color: #ff667b; }
.insight-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; margin-top: 28px; }
.insight-grid article { padding: 36px; background: var(--white); border: 1px solid var(--line); }
.priority-tag { margin: 0 0 24px !important; color: var(--red) !important; font-size: 10px !important; font-weight: 900; letter-spacing: .08em; }
.insight-grid h3 { margin: 30px 0 12px; font-size: 22px; line-height: 1.2; }
.insight-grid p { margin: 0; color: var(--muted); font-size: 16px; line-height: 1.65; }
.segment-rank { display: grid; width: 82px; aspect-ratio: 1; place-items: center; color: var(--red); background: var(--paper); border: 1px solid var(--line); font-size: 28px; font-weight: 900; letter-spacing: -.05em; }
.traffic-plan { display: grid; grid-template-columns: .9fr 1.1fr; gap: 60px; align-items: center; margin-top: 28px; padding: 42px; color: var(--white); background: var(--ink); }
.traffic-plan h3 { max-width: 480px; margin: 0; font-size: 28px; line-height: 1.2; letter-spacing: -.035em; }
.traffic-plan > p { margin: 0; color: #b8c6dc; font-size: 17px; line-height: 1.65; }

.creative { padding-block: 110px; border-top: 1px solid var(--line); }
.creative-heading { display: grid; grid-template-columns: 1.1fr .9fr; gap: 80px; align-items: end; }
.creative-heading > p { margin: 0; color: var(--muted); font-size: 19px; line-height: 1.65; }
.new-group-card { display: grid; grid-template-columns: .8fr .8fr 1.2fr; gap: 45px; align-items: center; margin-top: 58px; padding: 36px; color: var(--white); background: var(--ink); }
.new-group-card span, .new-group-card b { display: block; margin-bottom: 10px; color: #ff667b; font-size: 10px; font-weight: 900; letter-spacing: .1em; text-transform: uppercase; }
.new-group-card h3 { margin: 0; font-size: 25px; line-height: 1.2; letter-spacing: -.035em; }
.new-group-card p { margin: 0; color: #b8c6dc; font-size: 16px; line-height: 1.65; }
.new-group-card > div:nth-child(2) p { color: var(--white); font-size: 18px; font-weight: 750; }
.combinatorial { display: grid; grid-template-columns: .85fr 1.15fr; gap: 70px; align-items: center; margin-top: 28px; padding: 58px; background: var(--white); border: 1px solid var(--line); }
.combinatorial-copy h3 { margin: 0 0 22px; font-size: 30px; line-height: 1.18; letter-spacing: -.035em; }
.combinatorial-copy > p:not(.mini-label) { margin: 0; color: var(--muted); font-size: 17px; line-height: 1.65; }
.update-flow { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 12px; margin: 24px 0; padding: 14px; color: var(--white); background: var(--ink); font-size: 12px; font-weight: 800; line-height: 1.4; text-transform: uppercase; }
.update-flow span { color: #b8c6dc; }
.update-flow i { color: #ff667b; font-size: 17px; font-style: normal; }
.update-flow strong { color: #ff667b; }
.combo-stats { display: grid; grid-template-columns: repeat(3, 1fr); margin-top: 36px; border-block: 1px solid var(--line); }
.combo-stats div { padding: 18px 8px 18px 0; }
.combo-stats strong { display: block; color: var(--red); font-size: 38px; line-height: 1; letter-spacing: -.05em; }
.combo-stats span { display: block; margin-top: 8px; color: var(--muted); font-size: 12px; font-weight: 750; line-height: 1.35; text-transform: uppercase; }
.creative figure { margin: 0; }
.formats-figure { padding: 16px; background: var(--paper); }
.formats-figure figcaption, .direct-proof figcaption { margin-top: 12px; color: var(--muted); font-size: 13px; line-height: 1.55; }
.direct-proof { display: grid; grid-template-columns: 1.1fr .9fr; gap: 28px; margin-top: 28px; }
.direct-proof figure { padding: 14px; background: var(--white); border: 1px solid var(--line); }
.direct-proof img { width: 100%; }
.creative .note { margin: 28px 0 0; padding: 16px 18px; color: var(--muted); background: #e7edf5; border-left: 3px solid var(--red); font-size: 14px; line-height: 1.65; }

.summary { padding-block: 110px; border-top: 1px solid var(--line); }
.site-footer { color: var(--white); background: var(--ink); border-top: 4px solid var(--red); }
.footer-inner { display: grid; grid-template-columns: 1fr 1fr auto; align-items: center; gap: 48px; min-height: 156px; padding-block: 34px; }
.footer-brand { display: grid; gap: 13px; }
.footer-logo { display: flex; width: max-content; }
.footer-logo img { width: 154px; height: auto; filter: brightness(0) invert(1); }
.footer-brand p, .footer-description { margin: 0; color: #a9bad5; font-size: 13px; line-height: 1.5; }
.footer-description { font-weight: 750; }
.footer-cta { display: inline-flex; align-items: center; gap: 18px; padding: 14px 18px; color: var(--white); border: 1px solid rgba(255,255,255,.34); font-size: 13px; font-weight: 800; text-decoration: none; white-space: nowrap; }
.footer-cta span { color: #ff667b; font-size: 18px; }
.footer-cta:hover, .footer-cta:focus-visible { border-color: #ff667b; }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-visual { width: min(620px, 92%); }
  .approach-heading { grid-template-columns: 1fr; gap: 32px; }
  .hypothesis-grid { grid-template-columns: 1fr 1fr; }
  .hypothesis-grid article:nth-child(2) { border-right: 0; }
  .hypothesis-grid article:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .kpi-grid { grid-template-columns: repeat(2, 1fr); }
  .kpi-grid article { min-height: 130px; }
  .targeting-card, .result-layers, .context-grid, .summary-content, .insights-intro, .creative-heading, .combinatorial { grid-template-columns: 1fr; gap: 42px; }
  .new-group-card { grid-template-columns: 1fr 1fr; }
  .new-group-card > p { grid-column: 1 / -1; }
  .direct-proof { grid-template-columns: 1fr; }
  .traffic-plan { grid-template-columns: 1fr; gap: 28px; }
  .insight-grid { grid-template-columns: 1fr; }
  .site-header .agency-site-link { display: none; }
  .footer-inner { grid-template-columns: 1fr auto; gap: 28px; }
  .footer-description { grid-column: 1 / -1; grid-row: 2; }
}

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

@media (max-width: 620px) {
  .section-shell { width: min(100% - 30px, var(--max)); }
  .site-header { min-height: 58px; padding-inline: 15px; }
  .site-header nav { display: none; }
  .agency-logo img { width: 104px; }
  .header-brand { gap: 11px; }
  .case-type { max-width: 104px; white-space: normal; line-height: 1.25; }
  .hero { padding-block: 52px 78px; gap: 48px; }
  .hero h1 { font-size: 44px; }
  .lead { font-size: 19px; }
  .hero-result { align-items: flex-start; gap: 14px; }
  .hero-result > div { display: grid; gap: 10px; }
  .hero-result strong { font-size: 48px; }
  .hero-result span { padding: 0; border-left: 0; }
  .hero-result i { margin-top: 11px; }
  .context, .approach, .results, .insights, .creative, .summary { padding-block: 78px; }
  h2 { font-size: 36px; }
  .analysis-flow { display: grid; grid-template-columns: 1fr; justify-items: center; gap: 8px; text-align: center; }
  .analysis-flow i { transform: rotate(90deg); }
  .campaign-structure { display: grid; grid-template-columns: 1fr; justify-items: center; gap: 8px; }
  .campaign-structure i { transform: rotate(90deg); }
  .hypothesis-grid { grid-template-columns: 1fr; }
  .hypothesis-grid article { min-height: 480px; border-right: 0; border-bottom: 1px solid var(--line); }
  .hypothesis-grid article:last-child { border-bottom: 0; }
  .hypothesis-grid h3 { min-height: 0; margin-top: 38px; }
  .targeting-card { padding: 30px; }
  .targeting-card li { grid-template-columns: 1fr; gap: 7px; }
  .new-group-card { grid-template-columns: 1fr; gap: 28px; padding: 28px; }
  .new-group-card > p { grid-column: auto; }
  .combinatorial { padding: 28px; }
  .combinatorial-copy h3 { font-size: 28px; }
  .update-flow { grid-template-columns: 1fr; justify-items: center; text-align: center; }
  .update-flow i { transform: rotate(90deg); }
  .combo-stats { gap: 8px; }
  .combo-stats strong { font-size: 36px; }
  .results-heading { display: block; }
  .kpi-grid { grid-template-columns: 1fr 1fr; }
  .kpi-grid article { min-height: 120px; }
  .kpi-grid article:last-child { grid-column: 1 / -1; }
  .result-layer { padding: 28px; }
  .engagement-metrics { grid-template-columns: 1fr; }
  .insight-grid article { padding: 28px; }
  .traffic-plan { padding: 28px; }
  .traffic-plan h3 { font-size: 28px; }
  .footer-inner { grid-template-columns: 1fr; gap: 26px; min-height: 0; padding-block: 42px; }
  .footer-description { grid-column: auto; grid-row: auto; }
  .footer-cta { justify-content: space-between; width: 100%; }
}