:root {
  --canvas: #ECEBE8;
  --page: #FFFFFF;
  --ink: #0B0B0C;
  --ink-2: #55565A;
  --ink-3: #8C8D91;
  --rule: #E3E3E1;
  --cover: #111214;
  --accent: #6B6459;
  --accent-dark: #CBC2B3;
  --panel: #DCD6CB;
  --radius: 18px;
  --display: "Inter Tight", "Helvetica Neue", Arial, sans-serif;
  --body: "Inter", "Helvetica Neue", Arial, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { background: var(--canvas); color: var(--ink); font: 400 17px/1.55 var(--body); -webkit-font-smoothing: antialiased; }
a { color: inherit; }
img { display: block; max-width: 100%; height: auto; }
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

/* Nav */
nav { display: flex; align-items: center; justify-content: space-between; padding: 22px 0; }
.logo { font: 900 26px/1 var(--display); letter-spacing: -0.04em; text-decoration: none; }
.logo span { color: var(--accent); }
.links { display: flex; gap: 26px; align-items: center; font: 500 15px var(--display); }
.links a { text-decoration: none; }
.links a:hover, .links a[aria-current] { color: var(--accent); }
.pill { border: 1px solid var(--ink); border-radius: 999px; padding: 9px 18px; }
.pill:hover { background: var(--ink); color: var(--page) !important; }

/* Page: every section is a document page */
.page { background: var(--page); border-radius: var(--radius); padding: 32px 48px 64px; margin-bottom: 16px; }
.meta { display: flex; justify-content: space-between; font: 500 12px var(--mono); color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.04em; padding-bottom: 16px; border-bottom: 1px solid var(--rule); margin-bottom: 64px; }
.page-foot { display: flex; justify-content: space-between; gap: 16px; font: 400 12px var(--mono); color: var(--ink-3); margin-top: 64px; }
h1.title { font: 900 clamp(56px, 9vw, 120px)/0.88 var(--display); letter-spacing: -0.055em; }
h2 { font: 800 clamp(40px, 6vw, 72px)/0.95 var(--display); letter-spacing: -0.045em; margin-bottom: 48px; }
h2 sup, h1 sup { font-size: 0.45em; vertical-align: 0.9em; font-weight: 600; margin-left: 2px; }
h3 { font: 800 26px/1.1 var(--display); letter-spacing: -0.03em; }
h4 { font: 700 17px/1.3 var(--display); letter-spacing: -0.01em; margin-bottom: 6px; }
.cols { display: grid; grid-template-columns: 220px 1fr; gap: 32px; }
.cols + .cols { margin-top: 48px; }
.label { font: 600 15px/1.4 var(--display); }
.lead { font: 500 22px/1.45 var(--display); letter-spacing: -0.01em; max-width: 720px; }
.lead + .lead, .lead + p, p + p { margin-top: 16px; }
.prose p, .prose li { max-width: 720px; }
.prose ul, .prose ol { padding-left: 20px; margin-top: 12px; }
.prose li + li { margin-top: 6px; }
.muted { color: var(--ink-2); }
.num { font: 500 14px var(--mono); }
strong { font-weight: 600; }

/* Cover */
.cover { display: grid; grid-template-columns: 1.15fr 1fr; gap: 16px; margin-bottom: 16px; }
.dark { background: var(--cover); color: #F4F4F2; }
.dark .meta { color: #7C7E84; border-color: #26282C; }
.dark .page-foot { color: #7C7E84; }
.cover-main { border-radius: var(--radius); padding: 32px 48px 48px; display: flex; flex-direction: column; min-height: 620px; }
.cover-main .meta { margin-bottom: 0; }
.cover-main h1 { font: 900 clamp(52px, 6.6vw, 86px)/0.88 var(--display); letter-spacing: -0.055em; margin-top: auto; }
.cover-main h1 em { font-style: normal; color: var(--accent-dark); }
.cover-main p { font: 500 20px/1.45 var(--display); color: #B9BBC0; max-width: 500px; margin: 24px 0 32px; }
.sub { display: flex; gap: 8px; max-width: 460px; }
.sub input { flex: 1; min-width: 0; font: 400 16px var(--body); padding: 14px 18px; border-radius: 999px; border: 1px solid #34363B; background: #1B1C1F; color: #F4F4F2; }
.sub input::placeholder { color: #7C7E84; }
.sub button { font: 600 15px var(--display); padding: 14px 22px; border-radius: 999px; border: 0; background: #F4F4F2; color: var(--ink); cursor: pointer; }
.sub button:hover { background: var(--accent-dark); }
.sub-btn { display: inline-block; font: 600 16px var(--display); padding: 15px 26px; border-radius: 999px; background: #F4F4F2; color: var(--ink); text-decoration: none; }
.sub-btn:hover { background: var(--accent-dark); }
.fine { font: 400 12px var(--mono); color: #7C7E84; margin-top: 12px; }

.cover-side { background: var(--panel); border-radius: var(--radius); padding: 32px; display: flex; flex-direction: column; position: relative; overflow: hidden; }
.cover-side .meta { color: rgba(11,11,12,0.6); border-color: rgba(11,11,12,0.15); margin-bottom: 0; }
.goal-card { background: var(--page); border-radius: 14px; padding: 32px; margin-top: auto; box-shadow: 0 20px 50px rgba(40,35,25,0.10); }
.goal-card .big { font: 800 clamp(34px, 3.8vw, 46px)/0.95 var(--display); letter-spacing: -0.045em; margin-bottom: 16px; }
.goal-card p { color: var(--ink-2); font-size: 15px; }

/* Row list: letters, start-here index */
.row { display: grid; grid-template-columns: 220px 1fr auto; gap: 32px; align-items: baseline; padding: 24px 0; border-bottom: 1px solid var(--rule); text-decoration: none; }
.row:first-of-type { border-top: 1px solid var(--ink); }
.row:hover h3 { color: var(--accent); }
.row .num { color: var(--ink-3); }
.row p { color: var(--ink-2); font-size: 15px; margin-top: 6px; }
.arrow { font: 500 20px var(--display); }

/* Three-up cards */
.three { display: grid; grid-template-columns: repeat(3, 1fr); gap: 48px 24px; }
.two { display: grid; grid-template-columns: repeat(2, 1fr); gap: 48px 24px; }
.card { border-top: 2px solid var(--ink); padding-top: 18px; }
.card .n { font: 500 12px var(--mono); color: var(--ink-3); margin-bottom: 18px; display: block; }
.card p { color: var(--ink-2); margin-top: 8px; font-size: 15px; }
.card ul { list-style: none; margin-top: 14px; }
.card li { padding: 9px 0; border-bottom: 1px solid var(--rule); font-size: 15px; }

/* Setup spec: label / value rows */
.spec { margin-top: 16px; }
.spec div { display: grid; grid-template-columns: 76px 1fr; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--rule); font-size: 15px; }
.spec dt { font: 500 12px var(--mono); color: var(--ink-3); text-transform: uppercase; padding-top: 3px; }
.spec dd { color: var(--ink); }

/* Tables */
table { width: 100%; border-collapse: collapse; font: 400 15px var(--body); }
th { text-align: left; font: 500 12px var(--mono); color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.04em; padding: 0 12px 12px 0; border-bottom: 1px solid var(--ink); }
td { padding: 14px 12px 14px 0; border-bottom: 1px solid var(--rule); vertical-align: top; }
td.r, th.r { text-align: right; padding-right: 0; }

/* Stat strip */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.stat { border-top: 2px solid var(--ink); padding-top: 14px; }
.stat .v { font: 800 44px/1 var(--display); letter-spacing: -0.04em; }
.stat .k { color: var(--ink-2); font-size: 15px; margin-top: 8px; }

/* Chart book */
.charts { display: grid; grid-template-columns: repeat(2, 1fr); gap: 48px 24px; }
.chart img { border: 1px solid var(--rule); border-radius: 10px; }
.chart-info { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; padding: 14px 2px 0; }
.chart-info h3 { font-size: 22px; }
.chart-info .num { color: var(--ink-3); font-size: 12px; }
.chart p { color: var(--ink-2); font-size: 15px; padding: 4px 2px 0; }
.chart .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.chart .tags span { font: 500 12px var(--mono); background: #F2F2F0; border-radius: 999px; padding: 4px 10px; }
/* Chart Book before/after cards */
.cc { padding-top: 40px; margin-top: 40px; border-top: 2px solid var(--ink); display: grid; gap: 28px; }
.cc-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 8px 24px; }
.cc-head h3 { font: 800 clamp(34px, 4vw, 48px)/1 var(--display); letter-spacing: -0.04em; }
.cc-head h3 span { font: 500 16px var(--display); letter-spacing: 0; color: var(--ink-2); margin-left: 10px; }
.cc-date { font: 500 12px var(--mono); color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.04em; }
.cc-take { font: 600 clamp(19px, 2vw, 23px)/1.35 var(--display); letter-spacing: -0.01em; max-width: 48ch; margin-top: -10px; }
.cc-row { display: grid; grid-template-columns: minmax(0, 2.1fr) minmax(0, 1fr); gap: 14px 32px; align-items: start; }
.cc-k { grid-column: 1 / -1; font: 500 12px var(--mono); text-transform: uppercase; letter-spacing: 0.05em; color: var(--ink-3); border-bottom: 1px solid var(--rule); padding-bottom: 10px; display: flex; justify-content: space-between; gap: 12px; }
.cc-row img { width: 100%; height: auto; border: 1px solid var(--rule); border-radius: 8px; }
.cc-dl { display: grid; grid-template-columns: 1fr auto; margin: 0; }
.cc-dl dt, .cc-dl dd { padding: 9px 0; border-bottom: 1px solid var(--rule); margin: 0; font-size: 15px; }
.cc-dl dt { color: var(--ink-2); padding-right: 16px; }
.cc-dl dd { text-align: right; font: 500 14px var(--mono); font-variant-numeric: tabular-nums; }

/* Tools, rendered as kit-style covers */
.tool { text-decoration: none; }
.tool-img { background: #EDEDEB; border-radius: 14px; aspect-ratio: 4 / 3.4; display: grid; place-items: center; transition: background 0.2s; }
.tool:hover .tool-img { background: #E3E3E0; }
.mini { width: 58%; aspect-ratio: 3 / 4; background: var(--page); border-radius: 4px; box-shadow: 0 18px 40px rgba(0,0,0,0.14); padding: 8% 8% 0; display: flex; flex-direction: column; position: relative; transition: transform 0.25s; }
.tool:hover .mini { transform: translateY(-4px) rotate(-1deg); }
.mini .t { font: 900 clamp(22px, 2.6vw, 34px)/0.9 var(--display); letter-spacing: -0.05em; margin-top: 14%; }
.mini .s { font: 600 11px var(--display); text-align: right; }
.mini .tiny { font: 400 7px var(--mono); color: var(--ink-3); display: flex; justify-content: space-between; }
.mini .grad { margin: auto -8.7% 0; height: 42%; border-radius: 0 0 4px 4px; }
.mini .dot { position: absolute; right: 10%; bottom: 30%; width: 26%; aspect-ratio: 1; border-radius: 50%; background: var(--accent); }
.tool-info { display: flex; justify-content: space-between; align-items: baseline; padding: 14px 4px 0; }
.tool-info h3 { font-size: 22px; }
.tool-info .num { color: var(--ink-3); }
.tool p { color: var(--ink-2); font-size: 15px; padding: 4px 4px 0; }

/* In-page section index */
.toc { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 28px; }
.toc a { font: 500 12px var(--mono); text-decoration: none; border: 1px solid #34363B; border-radius: 999px; padding: 7px 14px; color: #B9BBC0; }
.toc a:hover { border-color: var(--accent-dark); color: var(--accent-dark); }

/* Letters: cover cards */
.letter { display: block; text-decoration: none; }
.letter img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; border-radius: 12px; transition: transform 0.2s; }
.letter:hover img { transform: translateY(-3px); }
.letter .kicker { margin: 14px 0 4px; }
.letter h3 { font-size: 22px; }
.letter:hover h3 { color: var(--accent); }
.letter p { color: var(--ink-2); font-size: 15px; margin-top: 6px; }

/* Footer */
.site-foot { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 32px; padding: 64px 4px 0; margin-top: 48px; border-top: 1px solid #D2D2CF; }
.site-foot a { text-decoration: none; }
.site-foot a:hover { color: var(--accent); }
.foot-brand p { color: var(--ink-2); font-size: 15px; max-width: 320px; margin-top: 16px; }
.foot-col { display: flex; flex-direction: column; gap: 10px; font: 500 15px var(--display); }
.foot-col h5 { font: 500 12px var(--mono); color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 4px; }
.foot-legal { grid-column: 1 / -1; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; font: 400 12px var(--mono); color: var(--ink-3); border-top: 1px solid #D2D2CF; padding: 18px 0 40px; margin-top: 8px; }

@media (max-width: 860px) {
  nav { flex-wrap: wrap; row-gap: 14px; padding: 18px 0 16px; }
  nav::after { content: ""; flex-basis: 100%; order: 1; }
  .links { display: contents; font-size: 14px; }
  .logo { flex: 1; }
  .links a:not(.pill) { order: 2; margin-right: 14px; }
  .pill { padding: 7px 14px; }
  .site-foot { grid-template-columns: 1fr 1fr; }
  .foot-brand { grid-column: 1 / -1; }
  .cover { grid-template-columns: 1fr; }
  .cover-main { min-height: 520px; }
  .three, .two, .charts { grid-template-columns: 1fr; }
  .cc-row { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .cols { grid-template-columns: 1fr; gap: 12px; }
  .page, .cover-main { padding: 24px 20px 48px; }
  .meta { margin-bottom: 48px; }
  .cover-side { min-height: 500px; padding: 24px 20px; }
  .row { grid-template-columns: 1fr auto; }
  .row .num { display: none; }
  .hide-sm { display: none; }
}
@media (max-width: 480px) {
  .wrap { padding: 0 12px; }
  .sub { flex-direction: column; }
  .stat .v { font-size: 34px; }
}

/* Tools: screenshots + feature card */
.feature { display: block; text-decoration: none; margin-bottom: 48px; }
.feature img { width: 100%; border-radius: 14px; }
.feature-info { display: flex; justify-content: space-between; align-items: flex-end; gap: 24px; padding: 16px 4px 0; }
.feature-info h3 { font-size: 26px; }
.feature-info p { color: var(--ink-2); font-size: 15px; margin-top: 6px; max-width: 640px; }
.kicker { font: 500 12px var(--mono); color: var(--ink-3); text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: 6px; }
.status-key { margin: -32px 0 40px; }
.status { white-space: nowrap; }
.status::before { content: ""; display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: var(--accent); margin-right: 6px; vertical-align: 1px; }
.go { display: inline-block; font: 600 15px var(--display); white-space: nowrap; margin-top: 10px; padding: 0 4px; }
.feature:hover .go, .tool:hover .go { color: var(--accent); text-decoration: underline; }
.shot { width: 100%; border-radius: 12px; border: 1px solid var(--rule); aspect-ratio: 16 / 10; object-fit: cover; object-position: top; transition: transform 0.2s; }
.tool:hover .shot { transform: translateY(-3px); }
@media (max-width: 860px) {
  .feature-info { flex-direction: column; align-items: flex-start; gap: 4px; }
}

/* Books */
.start .row h3 { font-size: 22px; }
.start .row:hover h3 { color: inherit; }
.by { font: 500 12px var(--mono); color: var(--ink-3); }
.shelf { list-style: none; display: grid; grid-template-columns: repeat(2, 1fr); column-gap: 32px; border-top: 1px solid var(--ink); }
.shelf li { display: flex; flex-direction: column; gap: 2px; padding: 12px 0; border-bottom: 1px solid var(--rule); font-size: 15px; }
.shelf .t strong { font-weight: 600; }
.dark .lead a { color: #F4F4F2; text-decoration-color: var(--accent-dark); text-underline-offset: 3px; }
@media (max-width: 860px) {
  .shelf { grid-template-columns: 1fr; }
}