:root {
  --paper: #f3efe6;
  --sheet: #faf8f2;
  --ink: #17160f;
  --soft: #4a463c;
  --muted: #7a7466;
  --rule: #d9d1bf;
  --rule-strong: #b9b09a;
  --accent: #c63d1c;
  --accent-ink: #fff8f0;
  --code: #ebe5d7;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --wrap: 1120px;
  --margin: 150px;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #12110d;
    --sheet: #1a1914;
    --ink: #ece6d8;
    --soft: #c4bdad;
    --muted: #8f8878;
    --rule: #2f2c25;
    --rule-strong: #4a463c;
    --accent: #ff7148;
    --accent-ink: #1a0b05;
    --code: #201e18;
  }
}

*, *::before, *::after { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 18px/1.6 var(--serif);
  font-feature-settings: "onum", "kern", "liga";
  -webkit-font-smoothing: antialiased;
  border-left: 7px solid var(--accent);
  min-height: 100vh;
}

a { color: inherit; text-decoration-color: var(--accent); text-decoration-thickness: 1.5px; text-underline-offset: 3px; }
a:hover { color: var(--accent); }

::selection { background: var(--accent); color: var(--accent-ink); }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 28px; }

/* Header */

.top { border-bottom: 1px solid var(--rule); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 24px; height: 64px; }

.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font: 600 17px/1 var(--mono); letter-spacing: -0.02em; }
.brand svg { width: 22px; height: 26px; flex: none; }
.brand:hover { color: var(--ink); }
.brand .dot { color: var(--accent); }

.nav { display: flex; gap: 4px; font: 14px/1 var(--sans); }
.nav a { text-decoration: none; padding: 8px 12px; border-radius: 3px; color: var(--soft); }
.nav a:hover { color: var(--ink); background: var(--code); }
.nav a.gh { color: var(--ink); border: 1px solid var(--rule-strong); }

body[data-page="format"] .nav a[href="/format/"],
body[data-page="start"] .nav a[href="/start/"],
body[data-page="why"] .nav a[href="/why/"],
body[data-page="free"] .nav a[href="/free/"] { color: var(--ink); box-shadow: inset 0 -2px 0 var(--accent); border-radius: 0; }

.menu { display: none; }

/* Type */

h1, h2, h3 { font-weight: 500; letter-spacing: -0.02em; line-height: 1.08; margin: 0; }
h1 { font-size: clamp(2.15rem, 5.2vw, 3.85rem); letter-spacing: -0.035em; }
h1 em, h2 em { font-style: italic; color: var(--accent); }
h2 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); }
h3 { font-size: 1.25rem; letter-spacing: -0.01em; line-height: 1.25; }

p { margin: 0 0 1em; }
.lede { font-size: 1.28rem; line-height: 1.5; color: var(--soft); max-width: 36em; }

.label { font: 500 12px/1.2 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); }
.label b { color: var(--accent); font-weight: 500; }

code, kbd { font: 0.84em/1.4 var(--mono); }
:not(pre) > code { background: var(--code); padding: 0.12em 0.36em; border-radius: 3px; white-space: nowrap; }

/* Sections with a margin column */

.sec { border-top: 1px solid var(--rule); padding: 64px 0; }
.sec .wrap { display: grid; grid-template-columns: var(--margin) minmax(0, 1fr); gap: 0 40px; }
.sec .mark { padding-top: 6px; }
.sec .mark .label { position: sticky; top: 24px; display: block; }
.sec .body > h2 { margin-bottom: 20px; }
.sec .body > .lede { margin-bottom: 32px; }
.prose { max-width: 40em; }
.prose h3 { margin: 40px 0 10px; }
.prose ul, .prose ol { padding-left: 1.2em; margin: 0 0 1em; }
.prose li { margin: 0 0 0.4em; }
.prose li::marker { color: var(--muted); }

/* Hero */

.hero { padding: 56px 0 72px; }
.hero .wrap { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(0, 1fr); gap: 56px; align-items: center; }
.hero h1 { margin: 18px 0 22px; }
.hero .lede { margin-bottom: 28px; }

.mast {
  font: 12px/1.4 var(--mono); letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--muted); border-bottom: 2px solid var(--ink); padding: 0 0 10px; margin: 0 0 28px;
}
.mast b { color: var(--accent); font-weight: 600; }

.card-wrap { position: relative; }
.stamp {
  position: absolute; right: -8px; top: -22px; z-index: 1;
  border: 2px solid var(--accent); color: var(--accent); background: color-mix(in srgb, var(--sheet) 88%, transparent);
  font: 700 11px/1 var(--mono); letter-spacing: 0.16em; text-transform: uppercase;
  padding: 9px 11px; transform: rotate(9deg); pointer-events: none;
}

.page-head { padding: 72px 0 56px; }
.page-head h1 { font-size: clamp(2.3rem, 5vw, 3.8rem); margin: 16px 0 22px; max-width: 15em; }
.page-head .lede { margin: 0; }

.actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.btn { display: inline-flex; align-items: center; gap: 8px; font: 500 15px/1 var(--sans); text-decoration: none; padding: 14px 20px; border-radius: 3px; border: 1px solid var(--ink); }
.btn.solid { background: var(--ink); color: var(--paper); }
.btn.solid:hover { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn:not(.solid):hover { border-color: var(--accent); }

.pledge-line { margin-top: 28px; font: 13px/1.5 var(--mono); color: var(--muted); }
.pledge-line span + span::before { content: "·"; margin: 0 10px; color: var(--rule-strong); }

/* Catalogue card */

.card {
  position: relative;
  background: var(--sheet);
  border: 1px solid var(--rule-strong);
  border-radius: 4px;
  padding: 0 0 18px;
  box-shadow: 0 1px 0 var(--rule), 0 18px 40px -24px rgba(40, 30, 10, 0.35);
  transform: rotate(-1.2deg);
  transition: transform 0.35s ease;
  font: 13px/1.62 var(--mono);
}
.card:hover { transform: rotate(0deg); }
.card::after {
  content: "";
  position: absolute; left: 50%; bottom: 10px; width: 14px; height: 14px; margin-left: -7px;
  border-radius: 50%; border: 1px solid var(--rule-strong); background: var(--paper);
}
.card-head { display: flex; justify-content: space-between; gap: 12px; padding: 14px 20px 10px; border-bottom: 2px solid var(--accent); color: var(--muted); font-size: 12px; }
.card-head b { color: var(--ink); font-weight: 600; }
.card dl { margin: 0; padding: 12px 20px 22px; display: grid; grid-template-columns: 7.8em 1fr; gap: 0 12px;
  background-image: linear-gradient(var(--rule) 1px, transparent 1px); background-size: 100% 21.06px; background-position: 0 32px; }
.card dt { color: var(--muted); }
.card dd { margin: 0; overflow-wrap: anywhere; }
.card .hl { color: var(--accent); }

/* Steps */

.steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 0; border: 1px solid var(--rule); border-radius: 4px; overflow: hidden; background: var(--sheet); }
.step { padding: 26px 24px 24px; border-right: 1px solid var(--rule); display: flex; flex-direction: column; }
.step:last-child { border-right: 0; }
.step .label { margin-bottom: 14px; }
.step h3 { margin-bottom: 8px; }
.step p { color: var(--soft); font-size: 16px; line-height: 1.5; }
.step pre { margin-top: auto; }

/* Code */

pre {
  position: relative;
  margin: 0 0 1.2em;
  padding: 16px 18px;
  background: var(--code);
  border-radius: 4px;
  overflow-x: auto;
  font: 13.5px/1.6 var(--mono);
  tab-size: 2;
}
pre .c { color: var(--muted); }
pre .k { color: var(--accent); }
pre .p { color: var(--muted); user-select: none; }
.copy {
  position: absolute; top: 8px; right: 8px;
  font: 11px/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--muted); background: var(--sheet); border: 1px solid var(--rule); border-radius: 3px;
  padding: 6px 8px; cursor: pointer; opacity: 0; transition: opacity 0.15s;
}
pre:hover .copy, .copy:focus { opacity: 1; }
.copy.done { color: var(--accent); border-color: var(--accent); }

.figure-cap { font: 13px/1.5 var(--sans); color: var(--muted); margin: -6px 0 24px; }

/* Response split */

.split { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 28px; align-items: start; }
.split pre { margin: 0; }

/* Numbers */

.numbers { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-top: 1px solid var(--ink); }
.num { padding: 22px 26px 0 0; }
.num + .num { padding-left: 26px; border-left: 1px solid var(--rule); }
.num .big { font-size: clamp(2.6rem, 5vw, 3.8rem); line-height: 1; letter-spacing: -0.04em; font-feature-settings: "lnum"; }
.num .big small { font-size: 0.42em; letter-spacing: 0; color: var(--muted); margin-left: 4px; }
.num p { margin: 12px 0 0; font-size: 16px; line-height: 1.45; color: var(--soft); }
.numbers.stack { grid-template-columns: 1fr; border-top: 0; }
.numbers.stack .num, .numbers.stack .num + .num { padding: 0 0 22px; border-left: 0; border-bottom: 1px solid var(--rule); }
.numbers.stack .num:last-child { border-bottom: 0; padding-bottom: 0; }
.foot { margin-top: 28px; font: 13px/1.5 var(--sans); color: var(--muted); }

/* Anatomy */

.anatomy { border: 1px solid var(--rule); border-radius: 4px; background: var(--sheet); font: 14px/1.5 var(--mono); }
.anatomy .row { display: grid; grid-template-columns: minmax(0, 17em) 7em minmax(0, 1fr); gap: 20px; padding: 11px 20px; border-top: 1px solid var(--rule); align-items: baseline; transition: background 0.15s; }
.anatomy .row:first-child { border-top: 0; }
.anatomy .row:hover { background: var(--code); }
.anatomy .row:hover .name { color: var(--accent); }
.anatomy .name { white-space: pre; }
.anatomy .size { color: var(--muted); text-align: right; font-feature-settings: "tnum"; }
.anatomy .note { font: 15px/1.45 var(--serif); color: var(--soft); }
.anatomy .row.opt .name { color: var(--muted); }

/* Free band */

.band { background: var(--ink); color: var(--paper); padding: 80px 0; }
.band .wrap { display: grid; grid-template-columns: var(--margin) minmax(0, 1fr); gap: 0 40px; }
.band .label { color: color-mix(in srgb, var(--paper) 60%, transparent); }
.band h2 { font-size: clamp(2.2rem, 5vw, 3.8rem); margin-bottom: 26px; }
.band h2 em { color: var(--accent); }
.band p { color: color-mix(in srgb, var(--paper) 78%, transparent); max-width: 34em; font-size: 1.15rem; }
.band a { color: var(--paper); }
.band ul { list-style: none; padding: 0; margin: 30px 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 40px; max-width: 46em; }
.band li { padding: 12px 0; border-top: 1px solid color-mix(in srgb, var(--paper) 18%, transparent); font-size: 16px; }
.band li::before { content: "✓"; color: var(--accent); margin-right: 10px; font-family: var(--sans); }

/* Tables */

.table { width: 100%; border-collapse: collapse; font-size: 16px; line-height: 1.45; margin: 0 0 1.4em; }
.table th { text-align: left; font: 500 12px/1.2 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); padding: 0 16px 10px 0; border-bottom: 1px solid var(--ink); }
.table td { padding: 12px 16px 12px 0; border-bottom: 1px solid var(--rule); vertical-align: top; }
.table td:first-child { white-space: nowrap; }
.table.compare td:first-child { white-space: normal; font-style: italic; color: var(--soft); width: 22%; }

/* Rules */

.rules { list-style: none; padding: 0; margin: 0 0 1.2em; counter-reset: r; border-top: 1px solid var(--ink); }
.rules li { display: grid; grid-template-columns: 3.4em 1fr; gap: 12px; padding: 14px 0; border-bottom: 1px solid var(--rule); font-size: 17px; line-height: 1.5; }
.rules li::before { counter-increment: r; content: "R" counter(r); font: 600 14px/1.9 var(--mono); color: var(--accent); }
.rules strong { font: 600 0.82em var(--mono); letter-spacing: 0.04em; }

.note { border-left: 2px solid var(--accent); padding: 4px 0 4px 18px; margin: 0 0 1.4em; color: var(--soft); font-size: 17px; }

/* Grid of cards */

.tiles { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.tiles.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.tile { border: 1px solid var(--rule); border-radius: 4px; padding: 22px 24px; background: var(--sheet); }
.tile h3 { margin-bottom: 8px; }
.tile p { margin: 0; color: var(--soft); font-size: 16px; line-height: 1.5; }
.tile.no h3::before { content: "✕ "; color: var(--muted); font-family: var(--sans); font-size: 0.8em; }

/* Form */

.form { max-width: 34em; display: grid; gap: 18px; margin-top: 8px; }
.field { display: grid; gap: 6px; }
.field label { font: 500 12px/1.2 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); }
.field label i { font-style: normal; text-transform: none; letter-spacing: 0; color: var(--rule-strong); }
.field input, .field select, .field textarea {
  font: 17px/1.4 var(--serif); color: var(--ink);
  background: var(--sheet); border: 1px solid var(--rule-strong); border-radius: 3px; padding: 11px 13px; width: 100%;
}
.field textarea { min-height: 7em; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: var(--accent); }
.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }
.form .small { font: 13px/1.5 var(--sans); color: var(--muted); margin: 0; }
.form-error { display: none; border-left: 2px solid var(--accent); padding: 6px 0 6px 14px; color: var(--accent); font-size: 16px; }
.form-error.show { display: block; }
.form button { justify-self: start; cursor: pointer; }

/* Footer */

.bottom { border-top: 1px solid var(--ink); padding: 48px 0 56px; font: 14px/1.6 var(--sans); color: var(--muted); }
.bottom .wrap { display: grid; grid-template-columns: 1.4fr repeat(3, 1fr); gap: 32px; }
.bottom h4 { font: 500 11px/1.2 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--ink); margin: 0 0 12px; }
.bottom ul { list-style: none; margin: 0; padding: 0; }
.bottom li { margin: 0 0 6px; }
.bottom a { text-decoration: none; }
.bottom a:hover { color: var(--accent); }
.bottom .colophon { max-width: 22em; }
.bottom .colophon p { margin: 12px 0 0; }
.bottom .quiet { color: var(--muted); opacity: 0.85; }

/* Responsive */

@media (max-width: 980px) {
  .hero .wrap { grid-template-columns: 1fr; gap: 48px; }
  .card { transform: none; max-width: 560px; }
  .tiles.three { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .step { border-right: 0; border-bottom: 1px solid var(--rule); }
  .step:last-child { border-bottom: 0; }
  .split { grid-template-columns: 1fr; }
  .bottom .wrap { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 760px) {
  body { font-size: 17px; border-left-width: 4px; }
  .wrap { padding: 0 20px; }
  .sec { padding: 48px 0; }
  .sec .wrap, .band .wrap { grid-template-columns: 1fr; }
  .sec .mark { margin-bottom: 14px; padding: 0; }
  .numbers { grid-template-columns: 1fr; }
  .num, .num + .num { padding: 20px 0; border-left: 0; border-bottom: 1px solid var(--rule); }
  .anatomy .row { grid-template-columns: 1fr auto; gap: 4px 16px; }
  .anatomy .note { grid-column: 1 / -1; }
  .tiles { grid-template-columns: 1fr; }
  .band ul { grid-template-columns: 1fr; }
  .table td:first-child { white-space: normal; }
  .menu { display: block; background: none; border: 1px solid var(--rule-strong); border-radius: 3px; color: var(--ink); font: 13px/1 var(--sans); padding: 8px 10px; cursor: pointer; }
  .nav { display: none; position: absolute; top: 64px; left: 0; right: 0; flex-direction: column; background: var(--paper); border-bottom: 1px solid var(--rule); padding: 8px 20px 16px; z-index: 5; }
  .nav.open { display: flex; }
  .top { position: relative; }
}

@media (prefers-reduced-motion: reduce) {
  .card { transition: none; }
}

@media (max-width: 980px) {
  .stamp { right: 8px; top: -18px; }
}

.figure-cap.after { margin: 14px 0 0; }
.rules.promise li::before { content: counter(r, decimal-leading-zero); }
.rules.promise strong { font: 600 1em var(--serif); letter-spacing: 0; }
.page-actions { margin-top: 34px; }