:root {
  --paper: #FFFFFF;
  --stone-25: #FBFAF7;
  --stone-50: #F4F1EA;
  --stone-100: #E8E1D3;
  --ink-1000: #0B1D3A;
  --ink-800: #142C50;
  --ink-700: #314158;
  --ink-500: #637086;
  --ink-300: #A6AFBD;
  --teal-700: #007C75;
  --teal-600: #00968E;
  --teal-500: #00A79D;
  --teal-100: #D8F3EF;
  --gold-600: #B8892D;
  --gold-100: #F4E9D0;
  --rule: rgba(11, 29, 58, 0.14);
  --rule-strong: rgba(11, 29, 58, 0.28);
  --font-serif: "Source Serif 4", "Iowan Old Style", Georgia, Cambria, "Times New Roman", serif;
  --font-sans: "IBM Plex Sans", Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --max: 1180px;
  --wide: 1280px;
  --prose: 720px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--paper); }
body { margin: 0; color: var(--ink-700); background: var(--paper); font-family: var(--font-sans); font-size: 17px; line-height: 1.58; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 4px; }
a:hover { color: var(--teal-700); }
.skip-link { position: absolute; left: -999px; top: 12px; background: var(--ink-1000); color: white; padding: 10px 14px; z-index: 100; }
.skip-link:focus { left: 12px; }
.site-header { position: sticky; top: 0; z-index: 50; background: rgba(255,255,255,.95); backdrop-filter: blur(12px); border-bottom: 1px solid var(--rule); }
.header-inner { max-width: var(--wide); margin: 0 auto; padding: 14px 28px; display:flex; align-items:center; justify-content:space-between; gap: 32px; position: relative; min-height: 82px; }
.logo { display:flex; align-items:center; flex: 0 0 auto; text-decoration:none; position: relative; z-index: 52; }
.logo img { display:block; width: clamp(238px, 25vw, 340px); max-width: 100%; height: auto; }
.nav { display:flex; gap: clamp(18px, 2vw, 28px); align-items:center; justify-content:flex-end; font-size: 15px; letter-spacing: .015em; flex: 1 1 auto; }
.nav a { text-decoration:none; color: var(--ink-500); white-space: nowrap; padding: 9px 0; }
.nav a[aria-current="page"], .nav a:hover { color: var(--ink-1000); }
.menu-toggle { display:none; align-items:center; gap:10px; border:1px solid var(--rule-strong); background:var(--paper); color:var(--ink-1000); border-radius:999px; padding:10px 13px; font-family:var(--font-mono); font-size:12px; text-transform:uppercase; letter-spacing:.08em; cursor:pointer; position:relative; z-index:53; }
.menu-toggle:hover { border-color: rgba(0,167,157,.52); color:var(--teal-700); }
.menu-toggle:focus-visible { outline:3px solid rgba(0,167,157,.28); outline-offset:3px; }
.menu-icon { display:grid; gap:4px; width:18px; }
.menu-icon span { display:block; height:2px; width:18px; border-radius:999px; background:currentColor; transition: transform .18s ease, opacity .18s ease; }
.menu-toggle[aria-expanded="true"] .menu-icon span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] .menu-icon span:nth-child(2) { opacity:0; }
.menu-toggle[aria-expanded="true"] .menu-icon span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
main { overflow: clip; }
.section { padding: 86px 24px; }
.section.tight { padding: 58px 24px; }
.section.stone { background: var(--stone-25); border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.section.dark { background: var(--ink-1000); color: rgba(255,255,255,.82); }
.container { max-width: var(--max); margin: 0 auto; }
.prose { max-width: var(--prose); }
.eyebrow { font-family: var(--font-mono); color: var(--teal-700); font-size: 12px; letter-spacing: .12em; text-transform: uppercase; font-weight: 700; margin: 0 0 14px; }
.dark .eyebrow { color: var(--teal-100); }
h1, h2, h3 { margin:0; color: var(--ink-1000); font-family: var(--font-serif); font-weight: 450; letter-spacing: -.022em; }
h1 { font-size: clamp(52px, 6.1vw, 92px); line-height: .98; max-width: 780px; }
h2 { font-size: clamp(34px, 4.6vw, 66px); line-height: 1.04; max-width: 900px; }
h3 { font-size: 25px; line-height: 1.15; letter-spacing: -.01em; }
.dark h1, .dark h2, .dark h3 { color: white; }
p { margin: 0; }
.lead { font-size: clamp(19px, 2vw, 24px); line-height: 1.45; color: var(--ink-700); max-width: 760px; }
.dark .lead { color: rgba(255,255,255,.82); }
.hero { padding: clamp(72px, 8vw, 112px) 24px clamp(80px, 9vw, 118px); border-bottom: 1px solid var(--rule); background: linear-gradient(90deg, transparent calc(100% - 1px), var(--stone-50) calc(100% - 1px)) 0 0/88px 88px; }
.hero-grid { max-width: var(--max); margin: 0 auto; display:grid; grid-template-columns: minmax(0, 1fr) minmax(260px, 360px); gap: clamp(44px, 6vw, 88px); align-items:end; }
.hero .lead { margin-top: 26px; }
.hero-tagline { margin-top: 18px; font-family: var(--font-mono); color: var(--ink-1000); font-size: 13px; letter-spacing: .10em; text-transform: uppercase; font-weight: 700; }
.hero-subtitle { margin-top: 12px; font-family: var(--font-serif); color: var(--teal-700); font-size: clamp(30px, 3.8vw, 58px); line-height: 1; letter-spacing: -.02em; font-style: italic; }
.hero-word { color: var(--teal-700); font-style: italic; }
.hero-aside { border-left: 1px solid var(--rule-strong); padding-left: 32px; display:grid; gap: 26px; align-self: end; }
.aside-stat .num { font-family: var(--font-mono); color: var(--ink-1000); font-size: 42px; line-height: 1; font-variant-numeric: tabular-nums; }
.aside-stat .label { font-size: 14px; color: var(--ink-500); margin-top: 8px; }
.rule-head { display:flex; align-items:flex-end; justify-content:space-between; gap: 24px; border-bottom: 3px solid var(--ink-1000); padding-bottom: 16px; margin-bottom: 36px; }
.dark .rule-head { border-bottom-color: white; }
.rule-head .meta { font-family: var(--font-mono); font-size: 12px; color: var(--ink-500); text-transform: uppercase; letter-spacing: .08em; white-space:nowrap; }
.dark .rule-head .meta { color: var(--teal-100); }
.grid-2 { display:grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 32px; }
.grid-3 { display:grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 0; border-top: 1px solid var(--rule); border-left: 1px solid var(--rule); }
.grid-4 { display:grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 0; border-top: 1px solid var(--rule); border-left: 1px solid var(--rule); }
.card { background: white; border: 1px solid var(--rule); padding: 28px; }
.card h3 { margin-bottom: 12px; }
.card p { color: var(--ink-700); }
.tile { border-right: 1px solid var(--rule); border-bottom: 1px solid var(--rule); padding: 30px; min-height: 220px; background: white; }
.tile .kicker { font-family: var(--font-mono); font-size: 12px; color: var(--teal-700); letter-spacing: .10em; text-transform: uppercase; margin-bottom: 18px; }
.tile h3 { margin-bottom: 12px; }
.tile p { font-size: 15px; }
.audience-card { display:flex; flex-direction:column; gap:16px; }
.audience-card .for { font-family: var(--font-mono); font-size: 12px; color: var(--gold-600); text-transform: uppercase; letter-spacing:.12em; }
.score-model { display:grid; grid-template-columns: 1fr 1fr; border-top:1px solid rgba(255,255,255,.16); border-left:1px solid rgba(255,255,255,.16); margin-top:34px; }
.score-row { padding: 26px; border-right:1px solid rgba(255,255,255,.16); border-bottom:1px solid rgba(255,255,255,.16); }
.score-row .weight { font-family:var(--font-mono); color:var(--teal-100); font-size:14px; letter-spacing:.08em; margin-bottom:10px; }
.score-row h3 { color:white; margin-bottom:8px; }
.score-row p { color: rgba(255,255,255,.72); font-size:15px; }
.band { display:inline-flex; align-items:center; border:1px solid var(--rule); border-radius:999px; padding:6px 10px; font-family: var(--font-mono); font-size:11px; letter-spacing:.08em; text-transform:uppercase; color: var(--ink-700); background: var(--stone-25); }
.band.teal { border-color:rgba(0,167,157,.28); color:var(--teal-700); background:#F0FCFA; }
.band.gold { border-color:rgba(184,137,45,.28); color:#805C14; background:#FFF9EA; }
.compare { border-top:1px solid var(--rule); }
.compare-row { display:grid; grid-template-columns: 1fr 1fr; border-bottom:1px solid var(--rule); }
.compare-row > div { padding:22px 24px; }
.compare-row > div:first-child { border-right:1px solid var(--rule); color:var(--ink-500); }
.compare-row strong { color:var(--ink-1000); font-weight:600; }
.timeline { border-left:2px solid var(--ink-1000); margin-top: 34px; }
.timeline-item { display:grid; grid-template-columns: 180px 1fr; gap:28px; padding: 0 0 34px 28px; position:relative; }
.timeline-item:before { content:""; position:absolute; left:-7px; top:4px; width:12px; height:12px; background:var(--teal-500); border-radius:50%; }
.timeline-item .date { font-family:var(--font-mono); font-size:13px; color:var(--ink-500); text-transform:uppercase; letter-spacing:.06em; }
.timeline-item h3 { margin-bottom:8px; }
.footer { background: var(--ink-1000); color: rgba(255,255,255,.7); padding: 56px 24px 32px; }
.footer .inner { max-width: var(--max); margin: 0 auto; display:grid; grid-template-columns: 1.2fr 1fr; gap: 44px; border-top:1px solid rgba(255,255,255,.16); padding-top:32px; }
.footer img { width: 260px; max-width:100%; height:auto; filter: none; }
.footer-logo { display:block; width: 300px; max-width:100%; }
.footer a { color: rgba(255,255,255,.78); text-decoration:none; }
.footer-nav { display:grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap:10px 24px; font-size:14px; }
.disclaimer { max-width: 800px; font-size: 13px; color: rgba(255,255,255,.56); margin-top: 28px; }
.page-title { padding: 72px 24px 58px; border-bottom:1px solid var(--rule); background:var(--stone-25); }
.page-title .container { display:grid; grid-template-columns: 1.2fr .8fr; gap: 48px; align-items:end; }
.page-title h1 { font-size: clamp(42px, 5.2vw, 78px); }
.page-title .lead { margin-top: 22px; }
.method-note { border-left: 3px solid var(--teal-500); padding: 18px 22px; background: var(--stone-25); color:var(--ink-700); }
.faq { max-width: 900px; }
details { border-top:1px solid var(--rule); padding: 20px 0; }
details:last-child { border-bottom:1px solid var(--rule); }
summary { cursor:pointer; color:var(--ink-1000); font-weight:600; }
details p { margin-top: 12px; color:var(--ink-700); }
@media (max-width: 1060px) {
  .header-inner { gap: 18px; padding-inline: 22px; }
  .logo img { width: 300px; }
  .nav { gap: 16px; font-size: 14px; }
}
@media (max-width: 940px) {
  .header-inner { min-height: 76px; }
  .logo img { width: min(278px, 62vw); }
  .menu-toggle { display:inline-flex; }
  .nav { display:none; position:absolute; left:20px; right:20px; top:calc(100% + 8px); background:rgba(255,255,255,.98); border:1px solid var(--rule); box-shadow:0 22px 48px rgba(11,29,58,.16); border-radius:20px; padding:10px; gap:0; font-size:16px; z-index:54; }
  .nav.is-open { display:grid; }
  .nav a { display:flex; align-items:center; justify-content:space-between; padding:14px 16px; border-radius:12px; color:var(--ink-700); }
  .nav a + a { border-top:1px solid var(--rule); }
  .nav a[aria-current="page"] { background:var(--stone-25); color:var(--ink-1000); }
  .nav a:hover { background:#F0FCFA; color:var(--teal-700); }
  .hero { padding-top: 66px; }
  .hero-grid, .page-title .container { grid-template-columns: 1fr; align-items:start; }
  .hero-aside { border-left:0; border-top:1px solid var(--rule-strong); padding-left:0; padding-top:24px; grid-template-columns: repeat(3, minmax(0,1fr)); }
  h1 { font-size: clamp(46px, 11vw, 72px); max-width: 720px; }
  .hero-subtitle { font-size: clamp(27px, 7vw, 44px); }
  .grid-3, .grid-4, .score-model { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .footer .inner { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  body { font-size:16px; }
  .header-inner { padding: 12px 16px; min-height: 70px; }
  .logo img { width: min(232px, 64vw); }
  .menu-toggle { padding:9px 10px; font-size:11px; }
  .menu-toggle-text { display:inline; }
  .nav { left:14px; right:14px; top:calc(100% + 6px); border-radius:18px; }
  .hero { padding: 50px 18px 64px; background-size:62px 62px; }
  .section { padding: 62px 18px; }
  .section.tight { padding: 48px 18px; }
  h1 { font-size: clamp(42px, 14vw, 62px); line-height: 1; }
  h2 { font-size: clamp(32px, 9vw, 46px); }
  .hero-subtitle { font-size: clamp(26px, 9vw, 38px); }
  .lead { font-size: 18px; }
  .hero-aside, .grid-2, .grid-3, .grid-4, .score-model, .compare-row, .timeline-item, .footer-nav { grid-template-columns: 1fr; }
  .compare-row > div:first-child { border-right:0; border-bottom:1px solid var(--rule); }
  .rule-head { display:block; }
  .rule-head .meta { margin-top:8px; display:block; }
  .timeline-item { gap: 8px; }
  .tile { min-height: auto; padding: 24px; }
}
@media (max-width: 420px) {
  .logo img { width: min(210px, 60vw); }
  .menu-toggle-text { display:none; }
  .hero-tagline { font-size: 11px; }
}