/* Twitter Ratio: lilac ledger paper, plum ink, a red-orange vinculum. Gloock for headings and big numbers,
   Epilogue for text, Fragment Mono for figures. */
@font-face { font-family: "Gloock"; src: url(/assets/fonts/gloock-latin-400-normal.woff2) format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Epilogue"; src: url(/assets/fonts/epilogue-latin-400-normal.woff2) format("woff2"); font-weight: 400; font-display: swap; }
@font-face { font-family: "Epilogue"; src: url(/assets/fonts/epilogue-latin-600-normal.woff2) format("woff2"); font-weight: 600; font-display: swap; }
@font-face { font-family: "Epilogue"; src: url(/assets/fonts/epilogue-latin-800-normal.woff2) format("woff2"); font-weight: 800; font-display: swap; }
@font-face { font-family: "Fragment Mono"; src: url(/assets/fonts/fragment-mono-latin-400-normal.woff2) format("woff2"); font-weight: 400; font-display: swap; }

:root {
  --bg: #F3F1F8; --surface: #FFFFFF; --surface-2: #EAE6F3; --ink: #1D1530; --muted: #5C5472; --line: #D9D3E6;
  --plum: #3B2A73; --plum-2: #2A1D57; --on-plum: #FFFFFF;
  --hot: #C9381F; --hot-l: #F27052; --hot-bg: #FCE7E1;
  --mint: #0E7A5F; --mint-l: #6EDCB4; --mint-bg: #DDF3EA;
  --sun: #F2B33D; --sun-bg: #FDF1D6;
  --grid: rgba(59, 42, 115, .055);
  --serif: "Gloock", "Iowan Old Style", Georgia, serif;
  --sans: "Epilogue", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "Fragment Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --r: 14px; --shadow: 0 1px 0 rgba(29, 21, 48, .06), 0 10px 30px -18px rgba(29, 21, 48, .35);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15111F; --surface: #1F1A2D; --surface-2: #2A2340; --ink: #EEEAF6; --muted: #A99FC0; --line: #362D4C;
    --plum: #A996F2; --plum-2: #C4B7FA; --on-plum: #15111F;
    --hot: #FF8A6B; --hot-l: #FF7A5C; --hot-bg: #3A1C18;
    --mint: #5FD9AE; --mint-l: #4FD1A5; --mint-bg: #12342A;
    --sun: #F5C25B; --sun-bg: #3A2E14;
    --grid: rgba(169, 150, 242, .06);
    --shadow: 0 1px 0 rgba(0, 0, 0, .3), 0 12px 30px -18px rgba(0, 0, 0, .8);
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: 84px; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 400 1.0625rem/1.65 var(--sans); overflow-x: hidden; }
img, svg { max-width: 100%; }
a { color: var(--plum); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--hot); }
:focus-visible { outline: 3px solid var(--sun); outline-offset: 2px; border-radius: 4px; }
h1, h2, h3 { font-family: var(--serif); font-weight: 400; line-height: 1.12; letter-spacing: -.01em; margin: 0 0 .5em; }
h1 { font-size: clamp(2.2rem, 5.4vw, 3.6rem); }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.15rem); }
h3 { font-size: 1.28rem; }
code { font-family: var(--mono); font-size: .9em; background: var(--surface-2); padding: .1em .35em; border-radius: 5px; }
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 720px) { .wrap { padding: 0 28px; } }
.skip { position: absolute; left: -999px; top: 8px; background: var(--plum); color: var(--on-plum); padding: 8px 14px; border-radius: 8px; z-index: 50; }
.skip:focus { left: 12px; }
.fine { font-size: .86rem; color: var(--muted); }
.kicker { font: 800 .78rem/1.3 var(--sans); letter-spacing: .14em; text-transform: uppercase; color: var(--hot); margin: 0 0 .9rem; }
.lede { font-size: 1.15rem; color: var(--muted); max-width: 40em; }
.sub { color: var(--muted); max-width: 46em; margin-top: -.2rem; }
[hidden] { display: none !important; }

/* header */
.top { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.top-in { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 66px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--ink); }
.brand-mark { flex: none; }
.brand-frac { display: inline-flex; flex-direction: column; align-items: center; font: 400 1.02rem/1 var(--serif); }
.brand-frac span:first-child { padding: 0 2px 3px; color: var(--plum); }
.brand-frac span:last-child { padding: 4px 2px 0; border-top: 3px solid var(--hot-l); color: var(--mint); width: 100%; text-align: center; }
.nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 4px; }
.nav a { display: block; padding: 8px 12px; border-radius: 999px; text-decoration: none; color: var(--ink); font-weight: 600; font-size: .95rem; }
.nav a:hover { background: var(--surface-2); color: var(--ink); }
.nav a[aria-current="page"] { background: var(--plum); color: var(--on-plum); }
.menu-btn { display: none; align-items: center; gap: 8px; background: none; border: 1px solid var(--line); color: var(--ink); border-radius: 999px; padding: 8px 14px; font: 600 .95rem var(--sans); cursor: pointer; }
.bars, .bars::before, .bars::after { display: block; width: 16px; height: 2px; background: currentColor; position: relative; }
.bars::before, .bars::after { content: ""; position: absolute; left: 0; }
.bars::before { top: -5px; } .bars::after { top: 5px; }
@media (max-width: 880px) {
  .menu-btn { display: inline-flex; }
  .nav { position: absolute; left: 0; right: 0; top: 100%; background: var(--bg); border-bottom: 1px solid var(--line); display: none; }
  .nav.open { display: block; }
  .nav ul { flex-direction: column; padding: 10px 16px 16px; }
  .nav a { border-radius: 10px; }
}

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 46px; padding: 10px 20px; border-radius: 999px; border: 2px solid var(--plum); background: var(--plum); color: var(--on-plum); font: 800 .98rem var(--sans); text-decoration: none; cursor: pointer; }
.btn:hover { background: var(--plum-2); border-color: var(--plum-2); color: var(--on-plum); }
.btn.ghost { background: transparent; color: var(--plum); }
.btn.ghost:hover { background: var(--surface-2); color: var(--plum); }
.btn.small { min-height: 38px; padding: 6px 14px; font-size: .9rem; }
.btn.post-x { background: var(--ink); border-color: var(--ink); color: var(--bg); }
.btn.post-x:hover { background: var(--hot); border-color: var(--hot); color: #fff; }
.linkish { background: none; border: 0; padding: 0; color: var(--plum); font: inherit; text-decoration: underline; cursor: pointer; }

/* hero */
.hero { background-image: linear-gradient(var(--grid) 1px, transparent 1px), linear-gradient(90deg, var(--grid) 1px, transparent 1px); background-size: 28px 28px; border-bottom: 1px solid var(--line); padding: 44px 0 52px; }
.hero-in { display: grid; gap: 32px; align-items: start; }
@media (min-width: 960px) { .hero-in { grid-template-columns: 1fr 1.05fr; gap: 48px; padding-top: 18px; } }
.hero-copy h1 { margin-bottom: .35em; }
.ticks { list-style: none; padding: 0; margin: 1.4rem 0 0; display: flex; flex-wrap: wrap; gap: 8px 18px; font-weight: 600; font-size: .95rem; }
.ticks li::before { content: "÷"; color: var(--hot); font-family: var(--serif); margin-right: 7px; }

/* calculator card */
.calc { background: var(--surface); border: 1px solid var(--line); border-radius: 20px; box-shadow: var(--shadow); padding: 22px; margin: 0 0 40px; display: grid; gap: 20px; }
@media (min-width: 720px) { .calc { padding: 28px; } }
.tool-head + .calc { margin-top: 8px; }
@media (min-width: 900px) { .tool-head ~ .calc:not(.calc-health) { grid-template-columns: 1fr 1fr; gap: 32px; } .calc .calc-h { grid-column: 1 / -1; } }
.hero .calc { margin: 0; }
.calc-h { font-size: 1.1rem; font-family: var(--sans); font-weight: 800; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); margin: 0; }
.calc-form { display: grid; gap: 14px; align-content: start; }
.calc-form .btn { justify-self: start; }
fieldset { border: 0; padding: 0; margin: 0; min-width: 0; }
legend { font-weight: 800; font-size: .9rem; margin-bottom: 8px; padding: 0; }
legend em, .fld em { font-style: normal; font-weight: 400; color: var(--muted); font-size: .85em; }
.fld { display: grid; gap: 5px; font-weight: 600; font-size: .92rem; min-width: 0; }
.fld input { width: 100%; min-height: 50px; border: 2px solid var(--line); background: var(--bg); color: var(--ink); border-radius: 12px; padding: 10px 14px; font: 400 1.25rem var(--mono); }
.fld input:focus { border-color: var(--plum); outline: none; box-shadow: 0 0 0 4px color-mix(in srgb, var(--plum) 20%, transparent); }
.fld input[aria-invalid="true"] { border-color: var(--hot); }
.fld-wide { margin-top: 12px; }
.grid2, .grid3 { display: grid; gap: 12px; grid-template-columns: 1fr 1fr; }
@media (min-width: 560px) { .grid3 { grid-template-columns: repeat(3, 1fr); } }
.hint { margin: 0; font-size: .88rem; color: var(--muted); }
.frac-in { display: grid; gap: 10px; }
.frac-in .fld input { font-family: var(--serif); font-size: 2rem; min-height: 64px; text-align: center; }
.frac-in .fld span { text-align: center; }
.vinculum { height: 8px; border-radius: 4px; background: var(--hot-l); margin: 4px 0; }
.calc-out { min-width: 0; }
.calc-out .result { display: grid; gap: 10px; align-content: start; }
.err { margin: 0; background: var(--hot-bg); color: var(--ink); border-left: 4px solid var(--hot); padding: 10px 14px; border-radius: 8px; }
.r-label { margin: 0; font-weight: 800; font-size: .82rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.r-big { margin: 0; font: 400 clamp(2.6rem, 8vw, 4rem)/1 var(--serif); color: var(--plum); overflow-wrap: anywhere; }
.r-sub { margin: 0; color: var(--muted); }
.band { margin: 4px 0 0; }
.band-tag { display: inline-block; padding: 4px 12px; border-radius: 999px; background: var(--plum); color: var(--on-plum); font-weight: 800; font-size: .92rem; }
.band-scale { position: relative; display: grid; grid-template-columns: repeat(6, 1fr); gap: 3px; height: 14px; margin: 14px 0 6px; }
.seg { border-radius: 3px; }
.seg-1 { background: var(--hot); } .seg-2 { background: var(--hot-l); } .seg-3 { background: var(--sun); }
.seg-4 { background: var(--mint-l); } .seg-5 { background: var(--mint); } .seg-6 { background: var(--plum); }
.pin { position: absolute; top: -7px; width: 4px; height: 28px; background: var(--ink); border-radius: 2px; transform: translateX(-50%); left: 50%; box-shadow: 0 0 0 2px var(--surface); transition: left .35s ease; }
.notes { list-style: none; padding: 0; margin: 4px 0 0; display: grid; gap: 8px; }
.notes li { padding: 9px 12px; border-radius: 10px; background: var(--surface-2); font-size: .94rem; }
.notes li.warn { background: var(--sun-bg); border-left: 4px solid var(--sun); }
.share { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; margin-top: 8px; }
.copied { font-size: .9rem; color: var(--mint); font-weight: 600; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; margin: 6px 0; }
.stats div { background: var(--bg); border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; }
.stats dt { font-size: .8rem; color: var(--muted); font-weight: 600; }
.stats dd { margin: 2px 0 0; font: 400 1.25rem var(--mono); overflow-wrap: anywhere; }
.verdict { display: inline-block; }
.v-ratioed { color: var(--hot); } .v-contested { color: var(--sun); } .v-fine { color: var(--mint); } .v-early { color: var(--muted); }
@media (prefers-color-scheme: light) { .v-contested { color: #9A6400; } }
.tug { position: relative; display: flex; height: 18px; border-radius: 999px; overflow: hidden; background: var(--surface-2); margin-top: 8px; }
.tug-r { background: var(--hot); transition: width .35s ease; }
.tug-l { background: var(--mint); transition: width .35s ease; flex: 1; }
.tug-mid { position: absolute; left: 50%; top: -2px; bottom: -2px; width: 2px; background: var(--ink); }
.tug-key { display: flex; justify-content: space-between; margin: 0; font-size: .82rem; font-weight: 800; }
.k-r { color: var(--hot); } .k-l { color: var(--mint); }
.routes { display: grid; gap: 10px; }
.route { border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; background: var(--bg); }
.route h3 { font: 800 .95rem var(--sans); margin: 0 0 4px; }
.route p { margin: 0; }
.route .num { font: 400 1.5rem var(--serif); color: var(--plum); }
.meter { height: 12px; border-radius: 999px; background: var(--surface-2); overflow: hidden; }
.meter span { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--hot-l), var(--sun), var(--mint)); transition: width .35s ease; }
.calc-health { grid-template-columns: 1fr; }
@media (min-width: 900px) { .calc-health { grid-template-columns: 1.4fr 1fr; } .health-out { position: sticky; top: 90px; align-self: start; } }
.health-list fieldset { margin-bottom: 8px; }
.check { display: flex; gap: 12px; align-items: flex-start; padding: 9px 10px; border-radius: 10px; cursor: pointer; font-size: .98rem; }
.check:hover { background: var(--surface-2); }
.check input { width: 22px; height: 22px; accent-color: var(--plum); margin: 2px 0 0; flex: none; }
.check .w { margin-left: auto; font: 400 .8rem var(--mono); color: var(--muted); white-space: nowrap; padding-top: 3px; }
.next { margin: 0; padding-left: 1.2em; }

/* sections */
.sec { margin: 56px 0; }
.sec-head { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; flex-wrap: wrap; }
.sec-head a { font-weight: 600; }
.bands { list-style: none; padding: 0; margin: 20px 0 0; display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.bands li { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 16px 18px; border-top: 6px solid; }
.bands li p { margin: 0; font-size: .96rem; }
.bands h3 { margin: 2px 0 6px; }
.b-range { font: 400 .85rem var(--mono); color: var(--muted); }
.b-1 { border-top-color: var(--hot) !important; } .b-2 { border-top-color: var(--hot-l) !important; } .b-3 { border-top-color: var(--sun) !important; }
.b-4 { border-top-color: var(--mint-l) !important; } .b-5 { border-top-color: var(--mint) !important; } .b-6 { border-top-color: var(--plum) !important; }
.xsec { margin: 56px 0; padding: 28px 22px; border-radius: 22px; background: var(--plum); color: var(--on-plum); }
@media (min-width: 720px) { .xsec { padding: 40px; } }
.xsec .sub, .xsec .fine { color: color-mix(in srgb, var(--on-plum) 78%, transparent); }
.xsec a { color: var(--on-plum); }
.xsec a:hover { color: var(--sun); }
.cards { display: grid; gap: 14px; margin: 22px 0 18px; }
.cards.four { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.card { background: color-mix(in srgb, var(--on-plum) 9%, transparent); border: 1px solid color-mix(in srgb, var(--on-plum) 22%, transparent); border-radius: var(--r); padding: 18px; }
.card p { margin: 0 0 10px; font-size: .96rem; }
.card h3 { margin: 0 0 8px; }
.card a { font-weight: 600; font-size: .95rem; }
.card-n { font: 400 2.4rem/1 var(--serif) !important; margin-bottom: 12px !important; color: var(--sun); }
.card-n span { font-size: .45em; margin-left: 3px; }
.card-x { font-size: 1.6rem !important; line-height: 1.05 !important; }
.tool-grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); margin-top: 18px; }
.tool-card { display: block; text-decoration: none; color: var(--ink); background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 18px; transition: transform .15s ease, border-color .15s ease; }
.tool-card:hover { transform: translateY(-2px); border-color: var(--plum); color: var(--ink); }
.tool-card h3 { margin: 10px 0 6px; }
.tool-card p { margin: 0; color: var(--muted); font-size: .95rem; }
.tool-mark { display: inline-block; font: 400 .9rem var(--mono); background: var(--hot-bg); color: var(--hot); padding: 3px 9px; border-radius: 6px; }
.how-steps { counter-reset: s; list-style: none; padding: 0; display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.how-steps li { counter-increment: s; background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 18px 18px 18px 64px; position: relative; }
.how-steps li::before { content: counter(s); position: absolute; left: 18px; top: 14px; font: 400 2rem/1 var(--serif); color: var(--hot); }
.guide-list { list-style: none; padding: 0; margin: 18px 0 0; border-top: 1px solid var(--line); }
.guide-list a { display: grid; grid-template-columns: 52px 1fr; gap: 2px 14px; padding: 16px 4px; border-bottom: 1px solid var(--line); text-decoration: none; color: var(--ink); }
.guide-list a:hover .gl-t { color: var(--hot); }
.gl-n { grid-row: span 2; font: 400 1.6rem/1.1 var(--serif); color: var(--muted); }
.gl-t { font: 400 1.3rem/1.25 var(--serif); }
.gl-d { color: var(--muted); font-size: .95rem; }
.faq { margin: 56px 0; max-width: 820px; }
.faq details { border-bottom: 1px solid var(--line); padding: 4px 0; }
.faq summary { cursor: pointer; font-weight: 800; padding: 12px 28px 12px 0; position: relative; list-style: none; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; position: absolute; right: 4px; top: 8px; font: 400 1.5rem var(--serif); color: var(--hot); }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 0 0 14px; color: var(--muted); }

/* articles */
.article { padding: 24px 0 8px; }
.narrow { max-width: 800px; }
.crumbs ol { list-style: none; display: flex; flex-wrap: wrap; gap: 4px; padding: 0; margin: 18px 0 14px; font-size: .88rem; color: var(--muted); }
.crumbs li + li::before { content: "/"; margin-right: 6px; color: var(--hot-l); }
.crumbs a { color: var(--muted); }
.art-head { margin-bottom: 22px; }
.byline { color: var(--muted); font-size: .92rem; }
.tool-head { padding: 6px 0 14px; max-width: 820px; }
.answer { background: var(--surface); border: 1px solid var(--line); border-left: 6px solid var(--hot-l); border-radius: 12px; padding: 16px 20px; margin: 0 0 28px; max-width: 820px; }
.answer-h { margin: 0 0 4px; font-weight: 800; font-size: .8rem; letter-spacing: .12em; text-transform: uppercase; color: var(--hot); }
.answer p:last-child { margin: 0; }
.art-grid { display: grid; gap: 40px; }
@media (min-width: 1000px) { .art-grid { grid-template-columns: minmax(0, 1fr) 280px; } .side { position: sticky; top: 90px; align-self: start; } }
.prose { max-width: 760px; min-width: 0; }
.prose h2 { margin-top: 2em; }
.prose h3 { margin-top: 1.6em; }
.prose li { margin-bottom: .35em; }
.prose blockquote { margin: 1.4em 0; padding: 4px 18px; border-left: 4px solid var(--plum); color: var(--muted); }
.takeaways { background: var(--mint-bg); border-radius: 12px; padding: 14px 18px 14px 38px; }
.table-wrap { overflow-x: auto; margin: 1.2em 0; border: 1px solid var(--line); border-radius: 12px; }
table { border-collapse: collapse; width: 100%; font-size: .95rem; background: var(--surface); }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { background: var(--surface-2); font-weight: 800; }
tr:last-child td { border-bottom: 0; }
.side-box, .toc { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r); padding: 16px 18px; margin-bottom: 14px; }
.side-h { margin: 0 0 8px; font-weight: 800; font-size: .78rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); }
.side-t { font: 400 1.2rem var(--serif); margin: 0 0 4px; }
.toc ol { margin: 0; padding-left: 1.2em; font-size: .94rem; }
.sources ul { font-size: .94rem; }
.links { padding-left: 1.2em; }
.links li { margin-bottom: .4em; }
.more { border-top: 1px solid var(--line); padding-top: 24px; }
.tool-body { max-width: 820px; padding-top: 0; }
.big-frac { display: inline-flex; flex-direction: column; align-items: center; font: 400 4rem/1 var(--serif); color: var(--plum); margin-bottom: 10px; }
.big-frac span:last-child { border-top: 8px solid var(--hot-l); padding-top: 6px; width: 100%; text-align: center; color: var(--mint); }

/* footer */
.foot { margin-top: 64px; background: var(--surface); border-top: 1px solid var(--line); padding: 40px 0 24px; }
.foot-grid { display: grid; gap: 28px; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); }
@media (min-width: 900px) { .foot-grid { grid-template-columns: 2fr 1.3fr 1.3fr 1fr; } }
.foot-brand { margin: 0 0 10px; font-size: 1.3rem; }
.foot-h { font-weight: 800; font-size: .8rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin: 0 0 8px; }
.foot ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 6px; font-size: .95rem; }
.foot-about p { margin: 0 0 10px; font-size: .95rem; }
.foot-base { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 20px; margin-top: 28px; padding-top: 18px; border-top: 1px solid var(--line); font-size: .86rem; color: var(--muted); }
@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto !important; } }
.fld input::placeholder { color: var(--muted); opacity: .45; }