:root {
  --blue: #0038CC;
  --blue-hover: #1A4FE0;
  --white: #ffffff;
  --paper: #F4F3EF;
  --ink: #0B0B0C;
  --muted: #6B6B6F;
  --rule: #DAD9D4;
  --font: "Helvetica Neue", "Inter Tight", Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --gutter: clamp(16px, 8.5vw, 172px);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font);
  background: var(--white);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }

.wrap { padding-left: var(--gutter); padding-right: var(--gutter); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--blue);
  color: var(--white);
  font-weight: 600;
  font-size: 16px;
  letter-spacing: -0.005em;
  padding: 15px 24px;
  border-radius: 8px;
}
.btn:hover { background: var(--blue-hover); }
.btn-sm { font-size: 14px; padding: 10px 16px; border-radius: 6px; }
.btn-lg { font-size: 18px; padding: 18px 28px; }

/* Nav */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
  padding: 0 clamp(16px, 2.5vw, 40px);
  color: var(--white);
  background: var(--ink);
}
.nav-label { font-weight: 700; font-size: 15px; letter-spacing: -0.01em; }

/* Hero */
.hero {
  position: relative;
  background: var(--ink);
  color: var(--white);
  padding-bottom: clamp(56px, 7vw, 96px);
  overflow: hidden;
}
.mega {
  font-weight: 700;
  letter-spacing: -0.05em;
  line-height: 0.95;
  font-size: clamp(46px, 7.4vw, 150px);
  margin-top: clamp(48px, 7vw, 120px);
  margin-left: -0.03em;
}
.mega-line { display: block; white-space: nowrap; }

.hero-foot {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 28px;
  margin-top: clamp(36px, 4vw, 64px);
}
.hero-sub {
  font-size: clamp(19px, 1.6vw, 26px);
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: rgba(255, 255, 255, .72);
  max-width: 34ch;
  text-wrap: balance;
}

/* Sections */
.section { padding: clamp(80px, 10vw, 150px) 0; background: var(--white); }
.section-alt { background: var(--paper); }

.split {
  display: grid;
  grid-template-columns: minmax(140px, 1fr) 3fr;
  gap: 40px;
}
.mono-label {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--muted);
  padding-top: 0.6em;
}
.lede {
  font-weight: 600;
  letter-spacing: -0.035em;
  line-height: 1.08;
  font-size: clamp(32px, 3.8vw, 60px);
  max-width: 20ch;
}

.lede-sm { font-size: clamp(28px, 2.8vw, 44px); max-width: 22ch; }
.lede-sub {
  margin-top: 28px;
  font-size: clamp(18px, 1.5vw, 22px);
  line-height: 1.5;
  letter-spacing: -0.01em;
  color: var(--muted);
  max-width: 46ch;
}

/* Everyday sources */
.sources { list-style: none; margin-top: clamp(48px, 6vw, 80px); border-top: 1px solid var(--ink); }
.sources li {
  display: grid;
  grid-template-columns: minmax(180px, 1.1fr) 2fr auto;
  gap: 24px;
  align-items: baseline;
  padding: 20px 0;
  border-bottom: 1px solid var(--rule);
}
.src-name { font-size: clamp(18px, 1.5vw, 22px); font-weight: 600; letter-spacing: -0.02em; }
.src-desc { font-size: 17px; color: var(--muted); }
.src-tag { font-family: var(--mono); font-size: 12px; color: var(--muted); text-align: right; }
.cta-note-dark { color: var(--muted); }

/* Numbered rows */
.rows { margin-top: clamp(48px, 6vw, 80px); border-top: 1px solid var(--ink); }
.row {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 16px;
  padding: 22px 0;
  border-bottom: 1px solid var(--rule);
  align-items: baseline;
}
.row dt { font-family: var(--mono); font-size: 13px; color: var(--muted); }
.row dd { font-size: clamp(18px, 1.5vw, 22px); line-height: 1.4; letter-spacing: -0.01em; }

/* Typeset index */
.index {
  list-style: none;
  margin-top: clamp(48px, 6vw, 80px);
  columns: 3;
  column-gap: 40px;
  border-top: 1px solid var(--ink);
  padding-top: 8px;
}
.index li {
  break-inside: avoid;
  font-size: 17px;
  letter-spacing: -0.005em;
  padding: 12px 0;
  border-bottom: 1px solid var(--rule);
}
.index-more a { color: var(--blue); font-weight: 600; }
.index-more a:hover { text-decoration: underline; text-underline-offset: 3px; }

/* Footer */
.cta {
  background: var(--ink);
  color: var(--white);
  padding-top: clamp(96px, 12vw, 180px);
}
.cta-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 32px;
}
.cta-title {
  font-weight: 700;
  letter-spacing: -0.055em;
  line-height: 0.9;
  font-size: clamp(56px, 10vw, 180px);
}
.foot-meta {
  display: flex;
  justify-content: space-between;
  margin-top: clamp(96px, 10vw, 160px);
  padding: 20px clamp(16px, 2.5vw, 40px);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-family: var(--mono);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
}

/* CTA rows */
.cta-row { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.cta-note { font-family: var(--mono); font-size: 13px; color: rgba(255, 255, 255, 0.55); }
.section-cta { margin-top: 40px; }

/* Keyboard focus */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--blue-hover);
  outline-offset: 3px;
  border-radius: 8px;
}

/* Responsive */
@media (max-width: 960px) {
  .index { columns: 2; }
}
@media (max-width: 820px) {
  .split { grid-template-columns: 1fr; }
  .mega-line { display: inline; white-space: normal; }
  .split { gap: 20px; }
  .mono-label { padding-top: 0; }
  .row { grid-template-columns: 44px 1fr; }
  .sources li { grid-template-columns: 1fr auto; gap: 6px 16px; }
  .src-desc { grid-column: 1 / -1; grid-row: 2; }
}
@media (max-width: 480px) {
  .index { columns: 1; }
}

/* 404 */
.notfound { min-height: calc(100vh - 64px); display: flex; align-items: center; padding: 80px 0; }
.notfound .cta-title { margin: 16px 0 40px; }
.text-link { color: rgba(255, 255, 255, 0.72); font-weight: 500; text-decoration: underline; text-underline-offset: 4px; }
.text-link:hover { color: var(--white); }

.tags-note { margin-top: 32px; font-size: 17px; color: var(--muted); }
.tags-note a { color: var(--blue); font-weight: 600; }
.tags-note a:hover { text-decoration: underline; text-underline-offset: 3px; }