:root {
  --paper: #f2efe8;
  --paper-2: #e8e4da;
  --ink: #11130f;
  --muted: #5b5f56;
  --line: #c9c7bd;
  --signal: #d8ff5f;
  --signal-dark: #506412;
  --orange: #f26735;
  --white: #fffdf8;
  --sans: "IBM Plex Sans", Arial, sans-serif;
  --serif: "Source Serif 4", Georgia, serif;
  --max: 1180px;
  --read: 760px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
button, input { font: inherit; }
:focus-visible { outline: 3px solid var(--orange); outline-offset: 4px; }
.wrap { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.read { width: min(calc(100% - 40px), var(--read)); margin-inline: auto; }
.eyebrow {
  margin: 0;
  font-size: .7rem;
  font-weight: 800;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(242, 239, 232, .95);
  border-bottom: 1px solid var(--ink);
  backdrop-filter: blur(10px);
}
.nav {
  min-height: 72px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  width: max-content;
  text-decoration: none;
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -.04em;
}
.nav-links { display: flex; gap: 28px; }
.nav-links a, .nav-end a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  font-size: .8rem;
  font-weight: 700;
  text-underline-offset: 5px;
}
.nav-end { justify-self: end; }
.nav-cta { padding: 0 17px; background: var(--ink); color: var(--white); text-decoration: none; }

.article-hero {
  padding: clamp(68px, 11vw, 140px) 0 clamp(54px, 8vw, 100px);
  border-bottom: 1px solid var(--ink);
}
.article-hero h1 {
  max-width: 13ch;
  margin: 25px 0 30px;
  font-family: var(--serif);
  font-size: clamp(3.7rem, 8.5vw, 8rem);
  font-weight: 500;
  letter-spacing: -.06em;
  line-height: .88;
}
.article-hero .dek { max-width: 750px; margin: 0; font-size: clamp(1.08rem, 1.7vw, 1.35rem); line-height: 1.6; }
.meta-strip { margin-top: 46px; display: flex; flex-wrap: wrap; gap: 10px; }
.meta-strip span { padding: 9px 12px; border: 1px solid var(--ink); font-size: .68rem; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.meta-strip .signal { background: var(--signal); }

.body-section { padding: clamp(64px, 9vw, 110px) 0; border-bottom: 1px solid var(--ink); }
.body-section.white { background: var(--white); }
.body-section.dark { background: var(--ink); color: var(--white); }
.section-grid { display: grid; grid-template-columns: .65fr 1.35fr; gap: clamp(44px, 8vw, 110px); align-items: start; }
.section-label { position: sticky; top: 110px; }
.body-section h2 {
  margin: 0 0 24px;
  font-family: var(--serif);
  font-size: clamp(2.5rem, 5vw, 4.8rem);
  font-weight: 500;
  line-height: .96;
  letter-spacing: -.05em;
}
.body-section h3 { margin: 38px 0 12px; font-size: 1rem; }
.prose p, .prose li { font-size: 1.02rem; line-height: 1.75; }
.prose p { margin: 0 0 22px; }
.prose ul, .prose ol { margin: 0 0 28px; padding-left: 1.3rem; }
.prose li { margin-bottom: 10px; }
.prose strong { font-weight: 800; }
.callout { margin: 32px 0; padding: 24px; border: 1px solid var(--ink); background: var(--signal); }
.callout p { margin: 0; font-family: var(--serif); font-size: clamp(1.4rem, 3vw, 2.1rem); line-height: 1.25; }
.dark .callout { color: var(--ink); }
.source-note { color: var(--muted); font-size: .76rem !important; line-height: 1.55 !important; }
.dark .source-note { color: #aeb1aa; }

.stat-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--ink); border-left: 1px solid var(--ink); }
.stat { min-height: 180px; padding: 24px; border-right: 1px solid var(--ink); border-bottom: 1px solid var(--ink); display: flex; flex-direction: column; justify-content: space-between; }
.stat strong { font-family: var(--serif); font-size: clamp(2.4rem, 5vw, 4.5rem); font-weight: 500; color: var(--signal-dark); }
.stat span { max-width: 20ch; font-size: .72rem; font-weight: 800; line-height: 1.45; letter-spacing: .08em; text-transform: uppercase; }

.workflow { margin: 30px 0 0; border-top: 1px solid currentColor; }
.workflow-step { display: grid; grid-template-columns: 52px 1fr; gap: 20px; padding: 21px 0; border-bottom: 1px solid currentColor; }
.workflow-step b { color: var(--orange); font-family: var(--serif); font-size: 1.6rem; font-weight: 500; }
.workflow-step p { margin: 0; }

.boundary { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--ink); border-left: 1px solid var(--ink); }
.boundary article { padding: 28px; border-right: 1px solid var(--ink); border-bottom: 1px solid var(--ink); }
.boundary h3 { margin: 0 0 18px; font-family: var(--serif); font-size: 2rem; font-weight: 500; }
.boundary ul { margin: 0; padding-left: 1.2rem; }
.boundary li { margin-bottom: 10px; line-height: 1.55; }
.boundary .stop { background: var(--paper-2); }

.verdict { padding: clamp(70px, 10vw, 130px) 0; background: var(--orange); border-bottom: 1px solid var(--ink); }
.verdict-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: clamp(44px, 8vw, 110px); align-items: end; }
.verdict h2 { max-width: 12ch; margin: 22px 0 0; font-family: var(--serif); font-size: clamp(3.2rem, 7vw, 7rem); font-weight: 500; line-height: .88; letter-spacing: -.06em; }
.verdict p { max-width: 50ch; margin: 0; font-size: 1.08rem; line-height: 1.7; }
.button { min-height: 52px; display: inline-flex; align-items: center; justify-content: center; margin-top: 28px; padding: 0 22px; border: 1px solid var(--ink); background: var(--signal); color: var(--ink); font-size: .8rem; font-weight: 800; text-decoration: none; }
.button:hover { background: var(--ink); color: var(--white); }

.gate { padding: clamp(56px, 8vw, 90px) 0; background: var(--orange); border-bottom: 1px solid var(--ink); }
.gate-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(40px, 8vw, 110px); align-items: end; }
.gate h2 { max-width: 12ch; margin: 20px 0 0; font-family: var(--serif); font-size: clamp(3rem, 6vw, 6rem); font-weight: 500; line-height: .9; letter-spacing: -.055em; }
.gate p { margin: 0 0 25px; line-height: 1.65; }
.signup { display: grid; grid-template-columns: 1fr 1fr auto; border: 1px solid var(--ink); background: var(--white); }
.signup label { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.signup input { min-width: 0; min-height: 58px; padding: 0 16px; border: 0; border-right: 1px solid var(--ink); background: transparent; }
.signup button { min-height: 58px; padding: 0 19px; border: 0; background: var(--signal); font-weight: 800; cursor: pointer; }
.signup button:hover { background: var(--ink); color: var(--white); }
.form-status { min-height: 1.5em; margin: 12px 0 0 !important; font-size: .78rem; font-weight: 700; }
.form-status.ok { color: #234000; }
.form-status.error { color: #6b1300; }

.resource-index { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--ink); border-left: 1px solid var(--ink); }
.resource-card { min-height: 400px; padding: 28px; border-right: 1px solid var(--ink); border-bottom: 1px solid var(--ink); display: flex; flex-direction: column; text-decoration: none; }
.resource-card:hover { background: var(--signal); }
.resource-card b { color: var(--orange); font-family: var(--serif); font-size: 2.8rem; font-weight: 500; }
.resource-card h2 { margin: 32px 0 12px; font-size: 2rem; }
.resource-card p { margin: 0; color: var(--muted); line-height: 1.55; }
.resource-card > span { margin-top: 24px; font-size: .7rem; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.resource-preview { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; margin-top: auto; padding-top: 26px; }
.resource-preview small { min-height: 54px; display: flex; align-items: flex-end; padding: 8px; border: 1px solid var(--line); color: var(--muted); font-size: .56rem; font-weight: 800; line-height: 1.3; letter-spacing: .07em; text-transform: uppercase; }
.resource-card:hover .resource-preview small { border-color: rgba(17,19,15,.38); color: var(--ink); }

.locked { display: none; }
.workbench-content[data-unlocked="true"] .locked { display: block; }
.workbench-content[data-unlocked="true"] .access-gate { display: none; }
.worksheet { width: 100%; border-collapse: collapse; margin: 25px 0 36px; font-size: .82rem; }
.worksheet th, .worksheet td { padding: 12px; border: 1px solid currentColor; text-align: left; vertical-align: top; }
.worksheet th { background: var(--paper-2); }
.checklist { list-style: none; padding: 0 !important; }
.checklist li { position: relative; padding: 16px 0 16px 34px; border-bottom: 1px solid var(--line); }
.checklist li::before { content: "□"; position: absolute; left: 0; top: 14px; font-size: 1.2rem; }

footer { padding: 34px 0 48px; background: var(--ink); color: var(--white); }
.footer-grid { display: grid; grid-template-columns: 1fr auto; gap: 30px; align-items: end; }
.footer-brand { font-family: var(--serif); font-size: clamp(2.4rem, 5vw, 5rem); letter-spacing: -.05em; }
.footer-meta { color: #9fa29a; font-size: .75rem; line-height: 1.8; text-align: right; }

@media (max-width: 900px) {
  .nav { grid-template-columns: 1fr auto; padding-top: 8px; }
  .nav-links { grid-column: 1 / -1; grid-row: 2; display: flex; width: 100%; justify-content: space-between; gap: 14px; overflow-x: auto; border-top: 1px solid var(--line); }
  .nav-end { grid-column: 2; grid-row: 1; }
  .nav-links a { min-height: 38px; flex: 0 0 auto; font-size: .7rem; }
  .section-grid, .verdict-grid, .gate-grid { grid-template-columns: 1fr; }
  .section-label { position: static; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .resource-index { grid-template-columns: 1fr; }
  .resource-card { min-height: 290px; }
}

@media (max-width: 620px) {
  .wrap, .read { width: min(calc(100% - 28px), var(--max)); }
  .nav { min-height: 64px; gap: 8px; }
  .nav-links { gap: 12px; }
  .nav-links a { font-size: .64rem; }
  .brand { font-size: 1rem; }
  .nav-cta { padding: 0 10px; font-size: .68rem !important; }
  .article-hero h1 { font-size: clamp(3.15rem, 16vw, 4.2rem); overflow-wrap: anywhere; }
  .stat-grid, .boundary { grid-template-columns: 1fr; }
  .stat { min-height: 145px; }
  .signup { grid-template-columns: 1fr; }
  .signup input { border-right: 0; border-bottom: 1px solid var(--ink); }
  .worksheet { display: block; overflow-x: auto; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-meta { text-align: left; }
}

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