:root {
  --ink: #0a0a0a;
  --paper: #ffffff;
  --soft: #f4f4f4;
  --muted: #5f5f5f;
  --line: #d9d9d9;
  --line-strong: #ababab;
  --max: 1180px;
  --radius: 18px;
  --shadow: 0 16px 50px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

img,
svg {
  max-width: 100%;
}

a {
  color: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid var(--ink);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 8px;
  z-index: 1000;
  padding: 10px 14px;
  background: var(--ink);
  color: var(--paper);
}

.skip-link:focus {
  left: 8px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.nav-wrap {
  width: min(calc(100% - 32px), var(--max));
  margin: 0 auto;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  text-decoration: none;
  font-weight: 900;
  letter-spacing: 0.08em;
  font-size: 0.91rem;
  white-space: nowrap;
}

.brand-mark {
  width: 34px;
  height: 34px;
  display: inline-grid;
  place-items: center;
  background: var(--ink);
  color: var(--paper);
  font-weight: 900;
  letter-spacing: -0.08em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 0.92rem;
  font-weight: 700;
}

.nav-links a {
  text-decoration: none;
}

.nav-links a:hover {
  text-decoration: underline;
  text-underline-offset: 5px;
}

.nav-toggle {
  display: none;
  border: 1px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  border-radius: 999px;
  padding: 9px 13px;
  font-weight: 800;
}

.container {
  width: min(calc(100% - 32px), var(--max));
  margin: 0 auto;
}

.narrow {
  width: min(calc(100% - 32px), 780px);
  margin: 0 auto;
}

.hero {
  padding: clamp(76px, 10vw, 140px) 0 clamp(64px, 9vw, 120px);
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.35fr 0.65fr;
  gap: clamp(40px, 7vw, 96px);
  align-items: end;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 18px;
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.03;
  letter-spacing: -0.035em;
}

h1 {
  font-size: clamp(3rem, 8vw, 7.4rem);
  max-width: 980px;
}

h2 {
  font-size: clamp(2.2rem, 5vw, 4.6rem);
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.65rem);
}

.lede {
  max-width: 760px;
  font-size: clamp(1.08rem, 2vw, 1.35rem);
  color: var(--muted);
  margin: 24px 0 0;
}

.hero-aside {
  border-top: 3px solid var(--ink);
  padding-top: 18px;
}

.price {
  display: block;
  font-size: clamp(3rem, 6vw, 5.4rem);
  font-weight: 950;
  letter-spacing: -0.055em;
  line-height: 1;
}

.price-note {
  margin: 8px 0 18px;
  color: var(--muted);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 13px 20px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  font-weight: 850;
  transition: transform 140ms ease, background 140ms ease, color 140ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button.secondary {
  background: var(--paper);
  color: var(--ink);
}

.button.secondary:hover {
  background: var(--soft);
}

.section {
  padding: clamp(68px, 9vw, 112px) 0;
}

.section.compact {
  padding: 56px 0;
}

.section.soft {
  background: var(--soft);
}

.section.black {
  background: var(--ink);
  color: var(--paper);
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.48fr);
  gap: 40px;
  align-items: end;
  margin-bottom: 42px;
}

.section-head p {
  margin: 0;
  color: var(--muted);
}

.section.black .section-head p,
.section.black .muted {
  color: #cecece;
}

.grid-2,
.grid-3,
.grid-4 {
  display: grid;
  gap: 18px;
}

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

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

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  background: var(--paper);
}

.card.dark {
  border-color: #333;
  background: #101010;
}

.card h3 {
  margin-bottom: 12px;
}

.card p:last-child,
.card ul:last-child {
  margin-bottom: 0;
}

.number {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--paper);
  font-weight: 900;
  margin-bottom: 20px;
}

.section.black .number {
  background: var(--paper);
  color: var(--ink);
}

.check-list,
.plain-list {
  padding: 0;
  margin: 20px 0 0;
  list-style: none;
}

.check-list li,
.plain-list li {
  position: relative;
  padding-left: 24px;
  margin: 10px 0;
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  font-weight: 900;
}

.plain-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  top: 0;
  font-weight: 900;
}

.kicker {
  font-size: 0.82rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}

.muted {
  color: var(--muted);
}

.metric-strip {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.metric {
  padding: 26px;
  border-right: 1px solid var(--line);
}

.metric:last-child {
  border-right: 0;
}

.metric strong {
  display: block;
  font-size: 1.6rem;
  line-height: 1.1;
  margin-bottom: 6px;
}

.notice {
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  padding: 24px;
  background: var(--paper);
}

.notice strong {
  display: block;
  margin-bottom: 5px;
}

.report-shell {
  border: 1px solid var(--line);
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--shadow);
  background: var(--paper);
}

.report-top {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: flex-start;
  padding: 26px;
  border-bottom: 1px solid var(--line);
  background: var(--ink);
  color: var(--paper);
}

.report-body {
  padding: clamp(22px, 5vw, 44px);
}

.finding {
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.finding:last-child {
  border-bottom: 0;
}

.finding-grid {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 28px;
  margin-top: 18px;
}

.finding-label {
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.copy-box {
  margin-top: 16px;
  padding: 18px;
  background: var(--soft);
  border-left: 4px solid var(--ink);
  font-weight: 700;
}

.faq-list {
  border-top: 1px solid var(--line);
}

details {
  border-bottom: 1px solid var(--line);
  padding: 0;
}

summary {
  cursor: pointer;
  list-style: none;
  padding: 22px 4px;
  font-weight: 850;
  font-size: 1.06rem;
}

summary::-webkit-details-marker {
  display: none;
}

details p,
details ul {
  margin: 0 0 24px;
  color: var(--muted);
  max-width: 800px;
}

.legal h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  margin: 42px 0 14px;
}

.legal h3 {
  font-size: 1.15rem;
  margin: 28px 0 10px;
}

.legal p,
.legal li {
  color: #2d2d2d;
}

.legal ul {
  padding-left: 22px;
}

.cta-band {
  padding: clamp(56px, 8vw, 90px) 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.cta-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: center;
}

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

.site-footer {
  padding: 48px 0 28px;
  background: var(--ink);
  color: var(--paper);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 24px;
}

.footer-links a {
  color: #d7d7d7;
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--paper);
  text-decoration: underline;
}

.footer-bottom {
  margin-top: 38px;
  padding-top: 20px;
  border-top: 1px solid #2f2f2f;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  color: #a9a9a9;
  font-size: 0.86rem;
}

.page-hero {
  padding: clamp(64px, 8vw, 100px) 0 56px;
  border-bottom: 1px solid var(--line);
}

.page-hero h1 {
  font-size: clamp(2.9rem, 7vw, 6.2rem);
}

.breadcrumb {
  margin-bottom: 18px;
  font-size: 0.86rem;
  color: var(--muted);
}

.breadcrumb a {
  text-underline-offset: 4px;
}

@media (max-width: 900px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav-links {
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px 16px 18px;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 13px 4px;
  }

  .hero-grid,
  .section-head,
  .footer-grid,
  .cta-inner {
    grid-template-columns: 1fr;
  }

  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid-3 {
    grid-template-columns: 1fr;
  }

  .finding-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }
}

@media (max-width: 640px) {
  .grid-2,
  .grid-4,
  .metric-grid {
    grid-template-columns: 1fr;
  }

  .metric {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .metric:last-child {
    border-bottom: 0;
  }

  .report-top,
  .footer-bottom {
    flex-direction: column;
  }

  .footer-links {
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: clamp(2.7rem, 15vw, 4.5rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}


/* Knowledge hub */
.knowledge-hero h1 { max-width: 1050px; }
.topic-nav { display:flex; flex-wrap:wrap; gap:10px; margin-top:30px; }
.topic-nav a { border:1px solid var(--ink); border-radius:999px; padding:9px 15px; text-decoration:none; font-weight:800; }
.topic-nav a:hover { background:var(--ink); color:var(--paper); }
.knowledge-card { display:flex; flex-direction:column; min-height:280px; }
.knowledge-card .kicker { margin-bottom:18px; }
.knowledge-card p { color:var(--muted); }
.knowledge-card .text-link { margin-top:auto; }
.section.black .knowledge-card { background:#101010; border-color:#333; color:var(--paper); }
.section.black .knowledge-card p { color:#cecece; }
.text-link { display:inline-block; font-weight:850; text-underline-offset:5px; margin-right:18px; }
.article-stack,.glossary-stack { display:grid; gap:26px; }
.article-panel { border:1px solid var(--line); border-radius:var(--radius); padding:clamp(24px,5vw,52px); scroll-margin-top:90px; }
.article-panel h2,.glossary-stack h2 { font-size:clamp(2rem,4vw,4rem); margin-bottom:20px; }
.article-panel h3 { font-size:1.25rem; margin:22px 0 10px; }
.article-intro { max-width:900px; font-size:1.16rem; color:var(--muted); }
.pros-cons { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:18px; margin:30px 0; }
.pros-cons>div { background:var(--soft); border-top:3px solid var(--ink); padding:24px; }
.pros-cons ul,.resource-steps { padding-left:22px; }
.pros-cons li,.resource-steps li { margin:10px 0; }
.practical { border-left:5px solid var(--ink); padding:18px 22px; margin:28px 0; background:var(--soft); }
.practical strong { text-transform:uppercase; letter-spacing:.08em; font-size:.8rem; }
.practical p { margin:6px 0 0; }
.copy-block { white-space:pre-wrap; font-family:ui-monospace,SFMono-Regular,Consolas,monospace; font-weight:600; }
.table-wrap { overflow-x:auto; margin:24px 0; }
table { width:100%; border-collapse:collapse; min-width:720px; }
th,td { text-align:left; vertical-align:top; border:1px solid var(--line); padding:14px; }
th { background:var(--ink); color:var(--paper); }
.glossary-stack>section { border-top:3px solid var(--ink); padding-top:36px; scroll-margin-top:90px; }
.term-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:16px; margin:30px 0 48px; }
.term-grid>div { border:1px solid var(--line); border-radius:var(--radius); padding:24px; scroll-margin-top:90px; }
.term-grid dt { font-size:1.3rem; font-weight:900; line-height:1.15; }
.term-grid dt span { display:block; color:var(--muted); font-size:.8rem; text-transform:uppercase; letter-spacing:.08em; margin-top:5px; }
.term-grid dd { margin:12px 0 0; color:#2d2d2d; }
@media(max-width:700px){.pros-cons,.term-grid{grid-template-columns:1fr}.knowledge-card{min-height:0}}