/* frayst.com: one stylesheet. Black on white, rules instead of boxes, three type families with one job each. */
:root {
  --ink: #141414; --paper: #ffffff; --muted: #5c5c5c; --rule: #dadada; --grey: #b8b8b8; --soft: #f4f4f4;
  --serif: Newsreader, Georgia, "Times New Roman", serif;
  --sans: Inter, "Helvetica Neue", Arial, sans-serif;
  --mono: "IBM Plex Mono", Consolas, "Courier New", monospace;
  color-scheme: light;
}
:root[data-theme="dark"] { --ink: #ececec; --paper: #121212; --muted: #a3a3a3; --rule: #333333; --grey: #5a5a5a; --soft: #1b1b1b; color-scheme: dark; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { --ink: #ececec; --paper: #121212; --muted: #a3a3a3; --rule: #333333; --grey: #5a5a5a; --soft: #1b1b1b; color-scheme: dark; }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--serif); font-size: 19px; line-height: 1.6;
  font-optical-sizing: auto; text-rendering: optimizeLegibility; }
a { color: inherit; text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip { position: absolute; left: -9999px; } .skip:focus { left: 16px; top: 12px; background: var(--paper); padding: 6px 10px; z-index: 9; font-family: var(--sans); font-size: 14px; }

.wrap { max-width: 1200px; margin: 0 auto; padding: 0 32px; }
.grid12 { display: grid; grid-template-columns: repeat(12, minmax(0, 1fr)); column-gap: 24px; }
.main { grid-column: 1 / span 7; } .margin { grid-column: 9 / span 4; } .full { grid-column: 1 / -1; }

/* preview ribbon (never in the public build) */
.preview { font-family: var(--mono); font-size: 12px; color: var(--muted); border-bottom: 1px dashed var(--grey); padding: 7px 32px; text-align: center; }

/* header */
header.site { border-bottom: 1px solid var(--rule); }
.bar { display: flex; align-items: center; justify-content: space-between; min-height: 68px; gap: 24px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand svg { display: block; height: 24px; width: auto; fill: currentColor; }
.brand span { font-family: var(--sans); font-weight: 700; letter-spacing: .14em; font-size: 15px; margin-right: -.14em; }
nav.primary { display: flex; gap: 26px; font-family: var(--sans); font-size: 14px; }
nav.primary a { text-decoration: none; color: var(--muted); }
nav.primary a:hover, nav.primary a[aria-current] { color: var(--ink); text-decoration: underline; text-underline-offset: 6px; }
.cta { font-family: var(--sans); font-size: 14px; font-weight: 500; background: var(--ink); color: var(--paper); padding: 10px 16px; text-decoration: none; white-space: nowrap; }
.cta:hover { text-decoration: underline; }

.actions { display: flex; align-items: center; gap: 16px; }
/* light/dark switch: square, like everything else */
button.switch { position: relative; width: 44px; height: 24px; padding: 0; border: 1px solid var(--ink); background: var(--paper); cursor: pointer; flex: none; }
button.switch .knob { position: absolute; top: 3px; left: 3px; width: 16px; height: 16px; background: var(--ink); transition: transform .15s ease; }
button.switch[aria-checked="true"] .knob { transform: translateX(20px); }
@media (prefers-reduced-motion: reduce) { button.switch .knob { transition: none; } }

/* sections and type */
section { padding: 72px 0; border-bottom: 1px solid var(--rule); }
section.pagehead { padding: 64px 0 44px; }
section:last-of-type { border-bottom: 0; }
.kicker { font-family: var(--sans); font-size: 13px; color: var(--muted); letter-spacing: .02em; margin: 0 0 18px; }
h1 { font-weight: 400; font-size: 44px; line-height: 1.12; letter-spacing: -.012em; margin: 0 0 22px; }
h2 { font-weight: 400; font-size: 28px; line-height: 1.2; margin: 0 0 18px; }
h2 + p { margin-top: -4px; }
.main h2:not(:first-child) { margin-top: 56px; }
h3 { font-family: var(--sans); font-size: 16px; font-weight: 500; line-height: 1.4; margin: 0 0 8px; }
p { margin: 0 0 16px; max-width: 68ch; }
.lede { font-size: 21px; }
b, strong { font-weight: 600; }
.mono { font-family: var(--mono); font-size: .86em; }
ul.plain, ol.plain { padding-left: 20px; margin: 0 0 16px; } ul.plain li, ol.plain li { margin-bottom: 9px; max-width: 66ch; }

/* margin notes */
.note { font-family: var(--sans); font-size: 13px; line-height: 1.6; color: var(--muted); border-top: 1px solid var(--rule); padding-top: 10px; margin-bottom: 20px; }
.note b { color: var(--ink); font-weight: 500; }
.note .mono { font-size: 12.5px; word-break: break-all; }

/* items we are waiting for, in the private preview */
.coming { font-family: var(--mono); font-size: 12.5px; color: var(--muted); border: 1px dashed var(--grey); padding: 1px 6px; white-space: nowrap; }
.gate { font-family: var(--mono); font-size: 11px; color: var(--muted); letter-spacing: .04em; text-transform: uppercase; display: block; margin-bottom: 4px; }

/* task grid */
.tasks { display: grid; grid-template-columns: repeat(30, 1fr); gap: 4px; margin: 34px 0 14px; }
.tasks i { aspect-ratio: 1; display: block; border: 1px solid var(--ink); cursor: default; animation: fill .35s ease-out both; }
.tasks i.h { background: var(--ink); }
.tasks i.b { background: var(--grey); border-color: var(--grey); }
.tasks i:hover, .tasks i:focus { outline: 2px solid var(--ink); outline-offset: 1px; }
@keyframes fill { from { opacity: 0; } to { opacity: 1; } }
@media (prefers-reduced-motion: reduce) { .tasks i { animation: none; } }
.legend { display: flex; flex-wrap: wrap; gap: 8px 22px; font-family: var(--sans); font-size: 13px; color: var(--muted); }
.legend i { display: inline-block; width: 11px; height: 11px; border: 1px solid var(--ink); margin-right: 7px; vertical-align: -1px; }
.legend i.h { background: var(--ink); } .legend i.b { background: var(--grey); border-color: var(--grey); }
.readout { font-family: var(--mono); font-size: 13px; min-height: 1.6em; margin-top: 10px; color: var(--ink); }

/* finding record */
.record { font-family: var(--mono); font-size: 14px; line-height: 1.75; border-top: 2px solid var(--ink); border-bottom: 1px solid var(--ink); padding: 12px 0 14px; margin: 8px 0 22px; }
.record .head { display: flex; justify-content: space-between; gap: 12px; font-weight: 500; border-bottom: 1px solid var(--rule); padding-bottom: 8px; margin-bottom: 8px; }
.record dl { display: grid; grid-template-columns: 170px 1fr; margin: 0; }
.record dt { color: var(--muted); } .record dd { margin: 0; }

/* tables */
table { width: 100%; border-collapse: collapse; font-family: var(--sans); font-size: 15px; }
th { text-align: left; font-weight: 500; font-size: 12px; letter-spacing: .04em; text-transform: uppercase; color: var(--muted); border-bottom: 1px solid var(--ink); padding: 0 14px 10px 0; vertical-align: bottom; }
td { border-bottom: 1px solid var(--rule); padding: 14px 14px 14px 0; vertical-align: top; }
td.num { font-family: var(--mono); font-size: 14px; font-variant-numeric: tabular-nums; white-space: nowrap; }
td small { display: block; color: var(--muted); font-size: 12.5px; margin-top: 2px; font-family: var(--sans); }
td.num small { font-family: var(--mono); }
tr.us td:first-child { box-shadow: inset 3px 0 0 var(--ink); padding-left: 12px; }
tr.us td { font-weight: 500; }

/* interval chart */
.ci { position: relative; height: 26px; margin: 8px 0 2px; border-left: 1px solid var(--ink); border-right: 1px solid var(--ink); }
.ci .axis { position: absolute; left: 0; right: 0; top: 13px; border-top: 1px solid var(--rule); }
.ci .band { position: absolute; top: 9px; height: 9px; background: var(--grey); }
.ci .pt { position: absolute; top: 4px; width: 2px; height: 19px; background: var(--ink); }
.ticks { display: flex; justify-content: space-between; font-family: var(--mono); font-size: 11px; color: var(--muted); }
.figcap { font-family: var(--sans); font-size: 14px; font-weight: 500; margin: 26px 0 0; }

/* lists of studies and notes */
.entries { border-top: 2px solid var(--ink); }
.entry { display: grid; grid-template-columns: 150px minmax(0, 1fr) 230px; column-gap: 24px; padding: 22px 0; border-bottom: 1px solid var(--rule); }
.entry .date { font-family: var(--mono); font-size: 13px; color: var(--muted); padding-top: 5px; }
.entry h3 { font-family: var(--serif); font-weight: 400; font-size: 23px; line-height: 1.25; margin: 0 0 6px; }
.entry h3 a { text-decoration: none; } .entry h3 a:hover { text-decoration: underline; }
.entry p { font-size: 17px; margin: 0; }
.entry .meta { font-family: var(--sans); font-size: 13px; color: var(--muted); line-height: 1.6; }
.entry .meta b { display: block; font-family: var(--mono); font-weight: 500; font-size: 15px; color: var(--ink); }

/* blocks */
.steps, .rules { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); column-gap: 24px; }
.steps { counter-reset: s; }
.steps > div { border-top: 2px solid var(--ink); padding-top: 14px; }
.steps > div::before { counter-increment: s; content: counter(s, decimal-leading-zero); font-family: var(--mono); font-size: 13px; color: var(--muted); display: block; margin-bottom: 8px; }
.rules > div { border-top: 1px solid var(--rule); padding-top: 14px; }
.steps p, .rules p, .two p { font-size: 17px; }
.two { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: 24px; }
.two > div { border-top: 1px solid var(--ink); padding-top: 14px; }
.toc { font-family: var(--sans); font-size: 13px; line-height: 2; position: sticky; top: 24px; }
.toc b { display: block; font-weight: 500; font-size: 12px; letter-spacing: .04em; text-transform: uppercase; }
.toc a { display: block; text-decoration: none; color: var(--muted); } .toc a:hover { color: var(--ink); text-decoration: underline; }
.btnrow { display: flex; flex-wrap: wrap; gap: 12px; margin: 8px 0 16px; }
.btn { font-family: var(--sans); font-size: 14px; border: 1px solid var(--ink); padding: 9px 14px; text-decoration: none; }
.btn[aria-disabled] { color: var(--muted); border-color: var(--grey); border-style: dashed; }
.contact { font-family: var(--mono); font-size: 22px; }
.quote { border-left: 2px solid var(--ink); padding-left: 16px; margin: 0 0 18px; max-width: 64ch; }

/* outreach brief: headline numbers */
.results { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); column-gap: 24px; margin-top: 30px; }
.results > div { border-top: 2px solid var(--ink); padding-top: 16px; }
.results .big { font-family: var(--mono); font-size: 46px; line-height: 1.05; letter-spacing: -.02em; margin: 0 0 12px; }
.results p { font-size: 17px; }
.results .src { font-family: var(--sans); font-size: 12.5px; color: var(--muted); margin: 0; }

/* footer */
footer.site { border-top: 1px solid var(--rule); padding: 30px 0 56px; font-family: var(--sans); font-size: 13px; color: var(--muted); }
footer.site .bar { min-height: 0; flex-wrap: wrap; }
footer.site nav { display: flex; flex-wrap: wrap; gap: 8px 20px; }
footer.site a { text-decoration: none; } footer.site a:hover { text-decoration: underline; color: var(--ink); }
button.theme { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }
button.theme:hover { text-decoration: underline; color: var(--ink); }

@media (max-width: 860px) {
  body { font-size: 17px; } .wrap { padding: 0 18px; } .preview { padding: 7px 18px; }
  .grid12 { display: block; }
  nav.primary { display: none; }
  .cta { padding: 8px 11px; font-size: 13px; }
  h1 { font-size: 32px; } h2 { font-size: 23px; } .lede { font-size: 18.5px; }
  section { padding: 52px 0; } section.pagehead { padding: 44px 0 30px; }
  .tasks { grid-template-columns: repeat(20, 1fr); gap: 3px; }
  .steps, .two, .rules, .results { grid-template-columns: 1fr; row-gap: 26px; }
  .results .big { font-size: 38px; }
  .record { font-size: 12.5px; } .record dl { grid-template-columns: 1fr; } .record dt { margin-top: 6px; }
  table { font-size: 14px; } td.num { white-space: normal; }
  table.wide { display: block; overflow-x: auto; } table.wide th, table.wide td { min-width: 108px; }
  .entry { grid-template-columns: 1fr; row-gap: 6px; }
  .toc { position: static; margin: 0 0 18px; }
  .hide-sm { display: none; }
  .contact { font-size: 19px; }
}
@media print {
  .preview, nav.primary, .cta, footer.site, .skip { display: none; }
  body { font-size: 15px; } h1 { font-size: 30px; } h2 { font-size: 21px; } .lede { font-size: 16.5px; }
  section { padding: 18px 0; } .results .big { font-size: 34px; } .steps p, .results p { font-size: 14.5px; }
  .results > div, .steps > div { break-inside: avoid; }
}