:root {
  --ink: #132b24;
  --ink-2: #234339;
  --paper: #f4f5ef;
  --white: #ffffff;
  --acid: #e9f35b;
  --mint: #93d9bd;
  --blue: #92c9f2;
  --coral: #f2a986;
  --gold: #edcb68;
  --line: rgba(19, 43, 36, .16);
  --muted: #5a6964;
  --shadow: 0 24px 70px rgba(19, 43, 36, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "DM Sans", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }

.site-header {
  width: min(1180px, calc(100% - 40px));
  height: 80px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  position: relative;
  z-index: 20;
}
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; font-family: Manrope, sans-serif; font-size: 1.15rem; letter-spacing: -.03em; }
.brand strong { font-weight: 800; }
.brand-mark { display: grid; grid-template-columns: 7px 7px; gap: 3px; width: 17px; height: 17px; transform: rotate(45deg); }
.brand-mark i { display: block; background: var(--ink); border-radius: 1px; }
nav { display: flex; gap: 28px; font-size: .92rem; font-weight: 600; }
nav a { text-decoration: none; position: relative; }
nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -6px; height: 2px; background: var(--ink); transition: right .25s; }
nav a:hover::after, nav a:focus-visible::after { right: 0; }
.menu-button { display: none; background: transparent; border: 0; padding: 8px; }

.hero {
  width: min(1180px, calc(100% - 40px));
  min-height: 690px;
  margin: 0 auto;
  padding: 86px 0 96px;
  display: grid;
  grid-template-columns: 1.02fr .98fr;
  gap: 76px;
  align-items: center;
}
.eyebrow { margin: 0 0 20px; font: 700 .73rem/1 Manrope, sans-serif; text-transform: uppercase; letter-spacing: .15em; }
h1, h2, h3 { font-family: Manrope, sans-serif; margin-top: 0; }
h1 { font-size: clamp(3.6rem, 7vw, 6.6rem); line-height: .92; letter-spacing: -.075em; margin-bottom: 30px; }
h1 em { font-style: normal; display: inline-block; position: relative; z-index: 1; }
h1 em::after { content: ""; position: absolute; z-index: -1; left: -.02em; right: -.08em; bottom: .03em; height: .21em; background: var(--acid); transform: rotate(-1.5deg); }
.hero-intro { max-width: 610px; font-size: 1.14rem; line-height: 1.7; color: var(--ink-2); }
.hero-actions { display: flex; align-items: center; gap: 28px; margin-top: 34px; flex-wrap: wrap; }
.button { display: inline-flex; justify-content: center; align-items: center; gap: 18px; padding: 14px 20px; border-radius: 4px; font-weight: 700; text-decoration: none; transition: transform .2s, box-shadow .2s; }
.button:hover, .button:focus-visible { transform: translateY(-2px); box-shadow: 0 10px 28px rgba(19,43,36,.2); }
.button-primary { background: var(--ink); color: white; }
.text-link { font-weight: 700; text-underline-offset: 5px; }
.text-link span { padding-left: 8px; }

.hero-matrix { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; position: relative; }
.axis-top { grid-column: 1 / -1; display: grid; grid-template-columns: 1fr 1fr; text-align: center; font: 700 .68rem/1 Manrope, sans-serif; text-transform: uppercase; letter-spacing: .13em; color: var(--muted); margin-bottom: 4px; }
.matrix-cell { min-height: 210px; padding: 22px; display: flex; flex-direction: column; justify-content: space-between; transition: transform .25s; }
.matrix-cell:hover { transform: translateY(-4px); }
.matrix-cell h2 { font-size: 1.25rem; letter-spacing: -.04em; margin: 0 0 7px; }
.matrix-cell p { margin: 0; font-size: .91rem; line-height: 1.45; }
.cell-letter { font: 800 4.2rem/.8 Manrope, sans-serif; letter-spacing: -.08em; opacity: .76; }
.strength { background: var(--mint); border-radius: 20px 4px 4px 4px; }
.opportunity { background: var(--blue); border-radius: 4px 20px 4px 4px; }
.weakness { background: var(--coral); border-radius: 4px 4px 4px 20px; }
.threat { background: var(--gold); border-radius: 4px 4px 20px 4px; }

.section { width: min(1180px, calc(100% - 40px)); margin: 0 auto; padding: 120px 0; }
.definition { border-top: 1px solid var(--line); display: grid; grid-template-columns: 90px .75fr 1.15fr; gap: 48px; }
.section-number { font: 700 .74rem/1 Manrope, sans-serif; }
.definition h2, .section-head h2, .method h2, .strategy h2, .cta h2 { font-size: clamp(2.35rem, 4vw, 4.2rem); line-height: 1.05; letter-spacing: -.06em; margin-bottom: 0; }
.definition-copy p { color: var(--muted); }
.definition-copy .lead { font-size: 1.35rem; line-height: 1.55; color: var(--ink); margin-top: 0; }

.components { border-top: 1px solid var(--line); }
.section-head { display: grid; grid-template-columns: 1.35fr .65fr; gap: 90px; align-items: end; margin-bottom: 64px; }
.section-head > p { margin: 0; color: var(--muted); font-size: 1.05rem; }
.component-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.component-card { min-height: 390px; padding: 24px; display: flex; flex-direction: column; }
.card-f { background: var(--mint); border-radius: 20px 4px 4px 20px; }
.card-o { background: var(--blue); }
.card-d { background: var(--coral); }
.card-a { background: var(--gold); border-radius: 4px 20px 20px 4px; }
.card-top { display: flex; justify-content: space-between; align-items: start; }
.card-top span { font: 800 3.8rem/1 Manrope, sans-serif; letter-spacing: -.07em; }
.card-top small { font-size: .7rem; text-transform: uppercase; letter-spacing: .08em; text-align: right; max-width: 75px; line-height: 1.3; }
.component-card h3 { font-size: 1.55rem; letter-spacing: -.04em; margin: 75px 0 12px; }
.component-card p { font-size: .94rem; line-height: 1.5; margin: 0; }
.component-card .prompt { margin-top: auto; padding-top: 25px; border-top: 1px solid rgba(19,43,36,.22); font-weight: 700; }

.knowledge { border-top: 1px solid var(--line); }
.knowledge-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.knowledge-grid a { min-height: 280px; padding: 28px; background: var(--white); text-decoration: none; display: flex; flex-direction: column; border: 1px solid transparent; transition: transform .2s, border-color .2s; }
.knowledge-grid a:hover, .knowledge-grid a:focus-visible { transform: translateY(-4px); border-color: var(--ink); }
.knowledge-grid a:nth-child(1) { border-radius: 20px 4px 4px 4px; }
.knowledge-grid a:nth-child(3) { border-radius: 4px 20px 4px 4px; }
.knowledge-grid a:nth-child(4) { border-radius: 4px 4px 4px 20px; }
.knowledge-grid a:nth-child(6) { border-radius: 4px 4px 20px 4px; }
.knowledge-grid a.featured { background: var(--ink); color: white; }
.knowledge-grid span { font: 700 .7rem Manrope, sans-serif; letter-spacing: .1em; }
.knowledge-grid h3 { margin: 60px 0 10px; font-size: 1.35rem; line-height: 1.2; letter-spacing: -.04em; }
.knowledge-grid p { margin: 0 0 24px; color: var(--muted); font-size: .94rem; }
.knowledge-grid .featured p { color: #c6d0cc; }
.knowledge-grid b { margin-top: auto; font-size: .86rem; }

.method { display: grid; grid-template-columns: .88fr 1.12fr; gap: 100px; border-top: 1px solid var(--line); }
.method-intro { position: sticky; top: 60px; align-self: start; }
.method-intro > p:last-child { max-width: 510px; color: var(--muted); font-size: 1.07rem; }
.steps { list-style: none; padding: 0; margin: 0; }
.steps li { display: grid; grid-template-columns: 56px 1fr; gap: 24px; padding: 26px 0 30px; border-bottom: 1px solid var(--line); }
.steps li > span { font: 700 .73rem/1 Manrope, sans-serif; padding-top: 8px; }
.steps h3 { font-size: 1.38rem; margin: 0 0 7px; letter-spacing: -.035em; }
.steps p { margin: 0; color: var(--muted); }

.strategy { width: 100%; max-width: none; background: var(--ink); color: white; padding-left: max(20px, calc((100vw - 1180px)/2)); padding-right: max(20px, calc((100vw - 1180px)/2)); display: grid; grid-template-columns: .95fr 1.05fr; gap: 100px; align-items: center; }
.strategy-copy > p { color: #c6d0cc; max-width: 560px; }
.strategy-copy .eyebrow { color: var(--acid); }
blockquote { margin: 34px 0 0; padding: 20px 0 0 24px; border-left: 3px solid var(--acid); font: 600 1.15rem/1.55 Manrope, sans-serif; color: white; }
.cross-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2px; background: rgba(255,255,255,.12); }
.cross-grid > div { background: var(--ink); min-height: 220px; padding: 28px; }
.cross-grid strong { display: block; font: 800 2.8rem/1 Manrope, sans-serif; color: var(--acid); }
.cross-grid span { display: block; margin: 24px 0 6px; font: 700 1.08rem Manrope, sans-serif; }
.cross-grid p { margin: 0; color: #c6d0cc; font-size: .92rem; line-height: 1.5; }

.mistakes { border-top: 1px solid var(--line); }
.mistake-list { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); }
.mistake-list article { padding: 32px 46px 38px 0; border-bottom: 1px solid var(--line); }
.mistake-list article:nth-child(odd) { border-right: 1px solid var(--line); }
.mistake-list article:nth-child(even) { padding-left: 46px; }
.mistake-list span { font: 700 .7rem Manrope, sans-serif; }
.mistake-list h3 { font-size: 1.3rem; letter-spacing: -.035em; margin: 17px 0 8px; }
.mistake-list p { margin: 0; color: var(--muted); }

.cta { background: var(--acid); width: min(1180px, calc(100% - 40px)); padding: 70px; border-radius: 24px; display: grid; grid-template-columns: 1.25fr .75fr; gap: 80px; align-items: end; margin-bottom: 90px; }
.cta h2 { max-width: 720px; }
.cta p { margin-top: 0; }
.button-light { background: var(--ink); color: white; margin-top: 14px; }
.book-band { border-top: 1px solid var(--line); display: grid; grid-template-columns: 150px 1.15fr .85fr; gap: 50px; align-items: end; }
.book-kicker { writing-mode: vertical-rl; transform: rotate(180deg); text-transform: uppercase; letter-spacing: .18em; font: 700 .72rem Manrope, sans-serif; align-self: stretch; border-left: 1px solid var(--line); padding-left: 22px; }
.book-band h2 { font-size: clamp(2.5rem, 4vw, 4.5rem); line-height: 1.02; letter-spacing: -.065em; margin: 0; }
.book-band > div:last-child p { color: var(--muted); }

.article-hero { width: min(980px, calc(100% - 40px)); margin: 0 auto; padding: 90px 0 70px; }
.article-hero h1 { max-width: 900px; font-size: clamp(3.3rem, 7vw, 6.4rem); }
.article-hero .lead { max-width: 760px; font-size: 1.3rem; color: var(--ink-2); }
.article-layout { width: min(980px, calc(100% - 40px)); margin: 0 auto; display: grid; grid-template-columns: 210px 1fr; gap: 70px; padding: 70px 0 110px; border-top: 1px solid var(--line); }
.article-aside { position: sticky; top: 35px; align-self: start; font-size: .82rem; color: var(--muted); }
.article-aside a { display: block; padding: 8px 0; font-weight: 700; text-decoration: none; color: var(--ink); }
.article-body h2 { font-size: clamp(2rem, 4vw, 3.3rem); line-height: 1.08; letter-spacing: -.055em; margin: 80px 0 22px; }
.article-body h2:first-child { margin-top: 0; }
.article-body h3 { font-size: 1.35rem; letter-spacing: -.035em; margin: 36px 0 10px; }
.article-body p, .article-body li { color: var(--muted); font-size: 1.06rem; }
.article-body .lead { color: var(--ink); font-size: 1.35rem; line-height: 1.55; }
.article-body ul, .article-body ol { padding-left: 22px; }
.article-body li { margin-bottom: 12px; }
.article-note { padding: 28px; background: var(--acid); color: var(--ink); margin: 38px 0; border-radius: 4px 18px 4px 18px; }
.article-note p { color: var(--ink); margin: 0; font: 650 1.12rem/1.55 Manrope, sans-serif; }
.principle-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin: 36px 0; }
.principle-grid article { padding: 24px; background: var(--white); min-height: 180px; }
.principle-grid article h3 { margin-top: 0; }
.numbered-list { list-style: none; padding: 0 !important; counter-reset: item; }
.numbered-list li { counter-increment: item; padding: 20px 0 20px 56px; border-bottom: 1px solid var(--line); position: relative; }
.numbered-list li::before { content: counter(item, decimal-leading-zero); position: absolute; left: 0; top: 22px; font: 700 .72rem Manrope, sans-serif; color: var(--ink); }
.next-reading { margin-top: 70px; padding-top: 30px; border-top: 1px solid var(--line); display: flex; justify-content: space-between; gap: 20px; }
.next-reading a { font-weight: 700; text-underline-offset: 5px; }
.prologue-hero { padding-bottom: 56px; }
.prologue-layout { padding-top: 56px; }
.prologue-body { max-width: 690px; }
.prologue-body > p { margin: 0 0 1.45em; color: #3e514a; }
.prologue-body > p:first-child::first-letter { float: left; font: 800 4.9rem/.78 Manrope, sans-serif; padding: .1em .1em 0 0; color: var(--ink); }
.prologue-body blockquote { background: var(--ink); margin: 34px 0; padding: 30px; border: 0; border-radius: 4px 18px 4px 18px; font-size: 1.35rem; }
.prologue-signoff { margin-top: 54px; padding-top: 24px; border-top: 1px solid var(--line); display: flex; flex-direction: column; gap: 4px; font-family: Manrope, sans-serif; }
.prologue-signoff span { color: var(--muted); font-size: .86rem; }

footer { width: min(1180px, calc(100% - 40px)); margin: 0 auto; padding: 30px 0 44px; border-top: 1px solid var(--line); display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 30px; align-items: center; color: var(--muted); font-size: .85rem; }
footer p { margin: 0; }
footer p:last-child { text-align: right; }
.brand-footer { color: var(--ink); }

@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; gap: 58px; padding-top: 66px; }
  .hero-copy { max-width: 760px; }
  .hero-matrix { max-width: 760px; }
  .definition { grid-template-columns: 55px 1fr; }
  .definition-copy { grid-column: 2; }
  .component-grid { grid-template-columns: 1fr 1fr; }
  .knowledge-grid { grid-template-columns: 1fr 1fr; }
  .component-card { min-height: 330px; border-radius: 4px; }
  .card-f { border-radius: 20px 4px 4px 4px; }
  .card-o { border-radius: 4px 20px 4px 4px; }
  .card-d { border-radius: 4px 4px 4px 20px; }
  .card-a { border-radius: 4px 4px 20px 4px; }
  .method { gap: 50px; }
  .strategy { gap: 50px; }
  .cta { padding: 52px; gap: 45px; }
  .book-band { grid-template-columns: 70px 1fr; }
  .book-band > div:last-child { grid-column: 2; }
}

@media (max-width: 760px) {
  .site-header { height: 70px; }
  .menu-button { display: flex; flex-direction: column; gap: 4px; cursor: pointer; }
  .menu-button span:not(.sr-only) { display: block; width: 22px; height: 2px; background: var(--ink); }
  nav { position: absolute; left: -20px; right: -20px; top: 70px; display: none; flex-direction: column; gap: 0; padding: 10px 20px 22px; background: var(--paper); border-bottom: 1px solid var(--line); box-shadow: 0 18px 30px rgba(19,43,36,.08); }
  nav.open { display: flex; }
  nav a { padding: 10px 0; }
  .hero { min-height: auto; padding: 58px 0 76px; }
  h1 { font-size: clamp(3.25rem, 15vw, 5rem); }
  .hero-actions { align-items: flex-start; flex-direction: column; }
  .section { padding: 82px 0; }
  .definition { grid-template-columns: 1fr; gap: 22px; }
  .definition-copy { grid-column: auto; }
  .section-head { grid-template-columns: 1fr; gap: 30px; margin-bottom: 44px; }
  .method { grid-template-columns: 1fr; gap: 42px; }
  .method-intro { position: static; }
  .strategy { grid-template-columns: 1fr; padding-top: 86px; padding-bottom: 86px; }
  .cta { grid-template-columns: 1fr; padding: 38px 28px; gap: 32px; }
  .book-band { grid-template-columns: 1fr; }
  .book-kicker { writing-mode: initial; transform: none; border-left: 0; border-bottom: 1px solid var(--line); padding: 0 0 18px; }
  .book-band > div:last-child { grid-column: auto; }
  .article-layout { grid-template-columns: 1fr; gap: 30px; }
  .article-aside { position: static; display: flex; flex-wrap: wrap; gap: 10px 20px; }
  footer { grid-template-columns: 1fr; }
  footer p:last-child { text-align: left; }
}

@media (max-width: 520px) {
  .site-header, .hero, .section, footer { width: min(100% - 28px, 1180px); }
  .hero-matrix { gap: 6px; }
  .matrix-cell { min-height: 180px; padding: 16px; }
  .matrix-cell h2 { font-size: 1rem; }
  .matrix-cell p { font-size: .8rem; }
  .cell-letter { font-size: 3.2rem; }
  .axis-top { font-size: .59rem; }
  .component-grid { grid-template-columns: 1fr; }
  .knowledge-grid { grid-template-columns: 1fr; }
  .component-card { min-height: 315px; border-radius: 8px; }
  .mistake-list { grid-template-columns: 1fr; }
  .mistake-list article, .mistake-list article:nth-child(even) { padding: 28px 0; border-right: 0; }
  .cross-grid { grid-template-columns: 1fr; }
  .cross-grid > div { min-height: 180px; }
  .cta { width: calc(100% - 28px); border-radius: 16px; }
  .article-hero, .article-layout { width: calc(100% - 28px); }
  .principle-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}