/* barj capital · overfitting detector. The Monitor's language (monitor/monitor.css): one typeface, mono for
   figures, hairlines that separate data, square corners, gold used sparingly, colour only in the charts. */
.ofd {
  --bg: #0A0F1C; --panel: #0E1424; --line: rgba(244,239,230,0.16); --line-soft: rgba(244,239,230,0.08);
  --fg: #F4EFE6; --fg-2: #D9D4C9; --muted: #9AA0B4; --faint: #8C92A8;
  --gold: #C9A87A; --gold-soft: rgba(201,168,122,0.14);
  --ok: #8cc49a; --warn: #e0a458; --bad: #e07a7a; --info: #7aa6d9;
  color: var(--fg); font-variant-numeric: lining-nums tabular-nums; color-scheme: dark;
  padding-bottom: 4rem;
}
.ofd *, .ofd *::before, .ofd *::after { box-sizing: border-box; }
.ofd button, .ofd input, .ofd select { font: inherit; color: inherit; }
.ofd .wrap { max-width: 1440px; margin: 0 auto; padding: 0 var(--gutter, 1.5rem); }
.ofd a { color: var(--fg); text-decoration: underline; text-decoration-color: rgba(244,239,230,0.35); text-underline-offset: 3px; }
.ofd a:hover { text-decoration-color: var(--gold); }
.ofd .mono, .ofd .big, .ofd table.t td { font-family: var(--mono); }
.ofd [hidden] { display: none !important; }
.ofd .verdict:empty { display: none; }
.ofd .sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

.ofd .kicker, .ofd .stamp, .ofd .lab, .ofd label, .ofd table.t th, .ofd figcaption, .ofd .cap, .ofd .hint, .ofd .note {
  font-weight: 500; font-size: 12.5px; color: var(--faint);
}
.ofd .kicker { display: flex; flex-wrap: wrap; justify-content: space-between; gap: .3rem 1rem; margin: 0 0 .6rem; }

/* ---------------------------------------------------------------- hero */
.ofd .ofd-hero { padding-top: clamp(6.5rem, 12vh, 9rem); padding-bottom: 2rem; }
.ofd .ofd-hero h1 { font-weight: 400; font-size: clamp(2rem, 4.4vw, 3.6rem); line-height: 1.06; margin: .8rem 0 1.4rem; max-width: 22ch; }
.ofd .lead { max-width: 68ch; color: var(--fg-2); line-height: 1.6; font-size: 1.1rem; margin: 0; }
.ofd .stamp { margin-top: 1.3rem; }

/* ---------------------------------------------------------------- controls */
.ofd .seg { display: inline-flex; flex-wrap: wrap; border: 1px solid var(--line); }
.ofd .seg button { border: 0; border-left: 1px solid var(--line-soft); background: none; padding: .5rem .8rem; cursor: pointer; white-space: nowrap;
  font-size: 13px; color: var(--muted); transition: color .2s, background .2s; }
.ofd .seg button:first-child { border-left: 0; }
.ofd .seg button:hover { color: var(--fg); }
.ofd .seg button[aria-pressed=true] { color: var(--fg); background: rgba(244,239,230,0.07); box-shadow: inset 0 -1px 0 var(--gold); font-weight: 500; }
.ofd .seg-sm button { padding: .38rem .62rem; font-size: 12.5px; }
.ofd .btn { border: 1px solid rgba(244,239,230,0.3); background: transparent; padding: .55rem 1rem; cursor: pointer; font-size: 13px; transition: border-color .2s, background .2s; }
.ofd .btn:hover { border-color: var(--fg); background: rgba(244,239,230,0.04); }
.ofd .link { background: none; border: 0; padding: 0; cursor: pointer; font-size: 13px; color: var(--fg-2); text-decoration: underline; text-underline-offset: 3px; text-decoration-color: rgba(244,239,230,0.35); }
.ofd .seg button:focus-visible, .ofd .btn:focus-visible, .ofd .link:focus-visible, .ofd input:focus-visible, .ofd select:focus-visible { outline: 1px solid var(--gold); outline-offset: 2px; }

.ofd .calc { display: grid; grid-template-columns: minmax(280px, 340px) minmax(0, 1fr); gap: 2.5rem; align-items: start; }
.ofd .inputs { position: sticky; top: 84px; display: flex; flex-direction: column; gap: 1rem; border-top: 1px solid var(--line); padding-top: 1.1rem; }
.ofd .fields { border: 0; margin: 0; padding: 0; display: flex; flex-direction: column; gap: .85rem; min-width: 0; }
.ofd label { display: flex; flex-direction: column; gap: .35rem; min-width: 0; }
.ofd input[type=text], .ofd select { width: 100%; background: var(--panel); border: 1px solid var(--line); border-radius: 0; padding: .5rem .6rem;
  font-family: var(--mono); font-size: 14px; color: var(--fg); }
.ofd input[readonly] { color: var(--gold); }
.ofd .row2 { display: grid; grid-template-columns: 1fr 1fr; gap: .8rem; }
.ofd .hint, .ofd .note { margin: 0; line-height: 1.5; font-weight: 400; }
.ofd .src-panel { display: flex; flex-direction: column; gap: .7rem; }
.ofd .drop { border: 1px dashed var(--line); padding: 1rem; cursor: pointer; gap: .4rem; transition: border-color .2s, background .2s; }
.ofd .drop.over, .ofd .drop:hover { border-color: var(--gold); background: var(--gold-soft); }
.ofd .drop input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.ofd .drop-h { color: var(--fg); font-size: 14px; }
.ofd .drop-s { font-weight: 400; line-height: 1.5; }

/* ---------------------------------------------------------------- cards */
.ofd .results { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2.6rem 2.2rem; min-width: 0; }
.ofd .card { border-top: 1px solid var(--line); padding-top: 1.1rem; min-width: 0; position: relative; }
.ofd .headline, .ofd .duo { display: flex; align-items: baseline; flex-wrap: wrap; gap: .4rem 1rem; margin: .1rem 0 .6rem; }
.ofd .duo > div { display: flex; flex-direction: column; gap: .1rem; min-width: 8.5rem; }
.ofd .big { font-size: clamp(2rem, 3.4vw, 2.7rem); line-height: 1.05; font-weight: 400; color: var(--fg); letter-spacing: -0.01em; }
.ofd .verdict { font-size: 12.5px; padding: .2rem .55rem; border: 1px solid var(--line); color: var(--fg-2); }
.ofd .verdict.ok { border-color: rgba(140,196,154,0.5); color: var(--ok); }
.ofd .verdict.bad { border-color: rgba(224,122,122,0.5); color: var(--bad); }
.ofd .verdict.warn { border-color: rgba(224,164,88,0.5); color: var(--warn); }
.ofd .sub { color: var(--muted); font-size: .97rem; line-height: 1.55; margin: 0 0 1rem; max-width: 74ch; }
.ofd .sub b, .ofd .note b { color: var(--fg); font-weight: 500; }
.ofd .tex { overflow-x: auto; overflow-y: hidden; margin: .4rem 0 .6rem; padding: .2rem 0; color: var(--fg-2); font-size: .95rem; }
.ofd .tex-live { color: var(--gold); }
.ofd .tex .katex-display { margin: .3rem 0; }
.ofd .chart { margin: .8rem 0 0; position: relative; }
.ofd .chart figcaption { margin-bottom: .5rem; font-weight: 400; line-height: 1.45; padding-right: 5.5rem; }
.ofd .plot { width: 100%; min-height: 40px; }
.ofd .legend { display: flex; flex-wrap: wrap; gap: .2rem 1.1rem; margin: 0 0 .3rem; font-family: var(--mono); font-size: 11px; color: var(--faint); }
.ofd .legend i { display: inline-block; width: 18px; height: 0; border-top: 1.6px solid var(--gold); vertical-align: middle; margin-right: .4rem; }
.ofd .legend i.ln2 { border-top: 1.2px dashed var(--info); }
.ofd .legend i.ref { border-top: 1px dashed rgba(244,239,230,0.45); }
.ofd .plot svg { display: block; width: 100%; height: auto; overflow: visible; }
.ofd .plot canvas { display: block; width: 100%; }
.ofd .chart .sharecard-btn, .ofd .card > .sharecard-btn { position: absolute; top: 0; right: 0; }
.ofd .card > .sharecard-btn { top: .9rem; }
.ofd .card > .kicker { padding-right: 5.5rem; }
.ofd svg text { font-family: var(--mono); font-size: 10.5px; fill: var(--faint); }
.ofd svg .ax { stroke: var(--line); stroke-width: 1; fill: none; }
.ofd svg .grid { stroke: rgba(244,239,230,0.06); stroke-width: 1; }
.ofd svg .ref { stroke: rgba(244,239,230,0.35); stroke-dasharray: 3 3; stroke-width: 1; }
.ofd svg .ln { fill: none; stroke: var(--gold); stroke-width: 1.6; }
.ofd svg .ln2 { fill: none; stroke: var(--info); stroke-width: 1.2; stroke-dasharray: 4 3; }
.ofd svg .dot { fill: var(--gold); stroke: var(--bg); stroke-width: 1.5; }
.ofd svg .bar { fill: rgba(122,166,217,0.55); }
.ofd svg .bar.neg { fill: rgba(224,122,122,0.6); }
.ofd svg .bar.hl { fill: var(--gold); }
.ofd svg text.lbl { fill: var(--fg-2); }
.ofd svg text.gold { fill: var(--gold); }

.ofd .tablewrap { overflow-x: auto; margin: 0 0 .8rem; }
.ofd table.t { width: 100%; border-collapse: collapse; font-size: 13px; }
.ofd table.t th { text-align: left; font-weight: 500; padding: .35rem .5rem .35rem 0; border-bottom: 1px solid var(--line); white-space: nowrap; }
.ofd table.t td { padding: .38rem .5rem .38rem 0; border-bottom: 1px solid var(--line-soft); white-space: nowrap; color: var(--fg-2); }
.ofd table.t td:first-child { font-family: var(--sans); color: var(--fg); }
.ofd table.t td.ok { color: var(--ok); } .ofd table.t td.bad { color: var(--bad); }
.ofd .pbo-charts { display: grid; grid-template-columns: 1fr; gap: 1.2rem; }
.ofd #pbo-s { margin: 0 0 .4rem; }

/* ---------------------------------------------------------------- worked example and methods */
.ofd .example, .ofd .methods { margin-top: 5rem; }
.ofd .h2 { font-weight: 400; font-size: clamp(1.6rem, 2.8vw, 2.3rem); margin: 0 0 .6rem; }
.ofd .h2-sub { color: var(--muted); max-width: 72ch; line-height: 1.6; margin: 0 0 1.4rem; font-size: 1.03rem; }
.ofd .ex-bar { display: flex; flex-wrap: wrap; gap: .8rem 2rem; align-items: center; margin: 0 0 2rem; }
.ofd .sizes { display: flex; align-items: center; gap: .8rem; flex-wrap: wrap; }
.ofd .ex-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 2.6rem 2.2rem; }
.ofd .ex-grid .c-wide { grid-column: 1 / -1; }
.ofd .m-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1rem 2.4rem; }
.ofd .methods h3 { font-weight: 500; font-size: 1.02rem; margin: 1.2rem 0 .4rem; }
.ofd .methods p { color: var(--muted); line-height: 1.6; font-size: .95rem; margin: 0 0 .6rem; }
.ofd .refs-h { margin-top: 2rem !important; }
.ofd .refs { color: var(--muted); font-size: .92rem; line-height: 1.55; padding-left: 1.3rem; margin: 0; max-width: 100ch; }
.ofd .refs li { margin-bottom: .45rem; }
.ofd .tex-inline .katex { font-size: 1em; }

.ofd .busy { color: var(--faint); }
.ofd .busy::after { content: ""; display: inline-block; width: .5em; animation: ofdDots 1.2s steps(4) infinite; }
@keyframes ofdDots { 0% { content: ""; } 25% { content: "."; } 50% { content: ".."; } 75% { content: "..."; } }
@media (prefers-reduced-motion: reduce) { .ofd .busy::after { animation: none; content: "..."; } }

@media (max-width: 1180px) {
  .ofd .results { grid-template-columns: 1fr; }
  .ofd .ex-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 860px) {
  .ofd .calc { grid-template-columns: 1fr; }
  .ofd .inputs { position: static; }
  .ofd .ex-grid, .ofd .m-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .ofd .tex { font-size: .8rem; }
}
@media (max-width: 420px) {
  .ofd .seg-sm button { padding: .36rem .5rem; }
  .ofd .duo > div { min-width: 7.5rem; }
}