/* Shared styles for the /learn/ pages (mirrors the tokens and nav/footer of index.html). */
:root {
  --forest: #1c1a14;
  --forest-2: #000000;
  --ledger: #ffffff;
  --paper: #ffffff;
  --brass: #b3902f;
  --brass-dark: #8a6c1f;
  --rule: #e6ddc4;
  --ink: #1c1a14;
  --ink-dim: #5c5646;
  --card: #ffffff;
  --true-bg: #f2e9cd;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--ledger); color: var(--ink); font-family: "Times New Roman", Times, serif; font-size: 18px; line-height: 1.65; }
.wrap { max-width: 1120px; margin: 0 auto; padding-inline: 20px; }
h1, h2, h3 { font-family: "Times New Roman", Times, serif; text-wrap: balance; color: var(--forest); }
.mono { font-family: "IBM Plex Mono", monospace; }
a { color: var(--forest); }

nav.top { border-bottom: 1px solid var(--rule); background: var(--paper); position: sticky; top: 0; z-index: 100; }
nav.top .wrap { display: flex; align-items: center; gap: 28px; padding-block: 16px; }
.brand { display: flex; align-items: center; gap: 9px; font-weight: 600; font-size: 20px; color: var(--forest); text-decoration: none; }
.logo-mark { color: var(--forest); flex-shrink: 0; }
.brand .logo-mark { width: 26px; height: 26px; }
.navlinks { display: flex; gap: 22px; margin-left: auto; font-size: 14.5px; font-weight: 500; flex-wrap: wrap; }
.navlinks a { text-decoration: none; color: var(--ink-dim); }
.navlinks a:hover, .navlinks a.on { color: var(--forest); }
.btn { display: inline-block; font-weight: 600; font-size: 14.5px; padding: 9px 18px; border-radius: 3px; text-decoration: none; border: 1.5px solid var(--forest); color: var(--forest); font-family: inherit; }
.btn.solid { background: var(--forest); color: var(--card); }
.btn.brass { border-color: var(--brass); background: var(--brass); color: #2a1d05; }
.btn.brass:hover { background: var(--brass-dark); border-color: var(--brass-dark); }

.eyebrow { font-family: "IBM Plex Mono", monospace; font-size: 12.5px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--brass-dark); display: block; margin-bottom: 12px; }
header.article-head { padding-block: 48px 28px; border-bottom: 1px solid var(--rule); }
header.article-head h1 { font-size: clamp(32px, 4.4vw, 48px); line-height: 1.12; margin: 0; max-width: 24ch; }
header.article-head .dek { font-size: 20px; color: var(--ink-dim); max-width: 60ch; margin: 14px 0 0; }
.crumbs { font-size: 14px; color: var(--ink-dim); margin-bottom: 16px; }
.crumbs a { color: var(--ink-dim); }

.layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 56px; padding-block: 36px 64px; }
article { max-width: 68ch; min-width: 0; overflow-wrap: break-word; }
article h2 { font-size: 28px; margin: 44px 0 10px; }
article h3 { font-size: 21px; margin: 28px 0 6px; }
article p, article li { color: var(--ink); }
article blockquote { margin: 22px 0; padding: 4px 0 4px 20px; border-left: 3px solid var(--brass); color: var(--ink-dim); font-style: italic; }
article .rule-box { background: var(--true-bg); border: 1px solid var(--rule); border-radius: 6px; padding: 16px 20px; margin: 20px 0; }
article .rule-box b { font-family: "IBM Plex Mono", monospace; font-size: 13px; letter-spacing: .06em; text-transform: uppercase; color: var(--brass-dark); display: block; margin-bottom: 4px; }
sup a { text-decoration: none; font-size: 12px; }
.sources { font-size: 14.5px; color: var(--ink-dim); border-top: 1px solid var(--rule); margin-top: 48px; padding-top: 16px; }
.sources ol { padding-left: 20px; }

.table-scroll { overflow-x: auto; margin: 18px 0; }
table.record { border-collapse: collapse; width: 100%; font-size: 15.5px; }
table.record th, table.record td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--rule); vertical-align: top; }
table.record th { font-family: "IBM Plex Mono", monospace; font-size: 12px; letter-spacing: .05em; text-transform: uppercase; color: var(--ink-dim); font-weight: 500; }
table.record td.num { font-family: "IBM Plex Mono", monospace; }
table.record td { overflow-wrap: normal; }
@media (max-width: 600px) {
  table.record thead { display: none; }
  table.record, table.record tbody, table.record tr, table.record td { display: block; width: 100%; }
  table.record tr { border: 1px solid var(--rule); border-radius: 6px; padding: 10px 12px; margin-bottom: 12px; }
  table.record td { border: 0; padding: 3px 0; }
  table.record td:first-child { font-weight: 600; padding-bottom: 6px; }
  table.record td[data-label]:not(:first-child)::before { content: attr(data-label) ": "; font-family: "IBM Plex Mono", monospace; font-size: 11.5px; text-transform: uppercase; letter-spacing: .05em; color: var(--ink-dim); }
}

aside.side { position: sticky; top: 90px; align-self: start; font-size: 15.5px; }
aside.side h4 { font-family: "IBM Plex Mono", monospace; font-size: 12px; letter-spacing: .08em; text-transform: uppercase; color: var(--ink-dim); margin: 0 0 8px; font-weight: 500; }
aside.side ul { list-style: none; padding: 0; margin: 0 0 28px; }
aside.side li { padding: 5px 0; border-bottom: 1px solid var(--rule); }
aside.side a { text-decoration: none; }
aside.side a.on { font-weight: 700; }

/* current darlings */
.darlings { margin: 22px 0; border: 1px solid var(--rule); border-radius: 6px; overflow: hidden; }
.darlings .dhead { background: var(--true-bg); padding: 12px 16px; display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; font-size: 14px; color: var(--ink-dim); }
.darlings .dhead strong { color: var(--forest); }
.darling { padding: 12px 16px; border-top: 1px solid var(--rule); }
.darling .top { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; align-items: baseline; }
.darling .tk { font-family: "IBM Plex Mono", monospace; font-weight: 600; }
.darling .co { color: var(--ink-dim); font-size: 15px; }
.darling .mets { font-family: "IBM Plex Mono", monospace; font-size: 13px; color: var(--ink-dim); display: flex; gap: 14px; flex-wrap: wrap; }
.darling .why { font-size: 15px; margin: 6px 0 0; }
.darlings .empty { padding: 16px; color: var(--ink-dim); }

.cta { margin: 36px 0; padding: 24px; border: 1px solid var(--rule); border-radius: 6px; background: var(--paper); }
.cta h3 { margin: 0 0 6px; }
.cta p { margin: 0 0 14px; color: var(--ink-dim); }
.disclaimer { font-size: 14px; color: var(--ink-dim); font-style: italic; }

.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; margin: 20px 0; }
.card { border: 1px solid var(--rule); border-radius: 6px; padding: 18px; text-decoration: none; color: var(--ink); display: block; }
.card:hover { border-color: var(--brass); }
.card h3 { margin: 0 0 6px; font-size: 20px; }
.card p { margin: 0; font-size: 15.5px; color: var(--ink-dim); }

footer { padding-block: 40px; border-top: 1px solid var(--rule); }
footer .wrap { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
footer .fine { font-size: 13px; color: var(--ink-dim); display: flex; align-items: center; gap: 8px; }
footer .logo-mark { width: 18px; height: 18px; color: var(--ink-dim); }
footer .flinks { display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: 13.5px; }
footer .flinks a { color: var(--ink-dim); text-decoration: none; }

@media (max-width: 860px) {
  .layout { grid-template-columns: minmax(0, 1fr); gap: 0; }
  aside.side { position: static; }
  nav.top .wrap { gap: 14px; flex-wrap: wrap; }
  .navlinks { gap: 14px; order: 3; width: 100%; margin-left: 0; }
  body { font-size: 17px; }
}

/* Backtests page (learn/backtests.html) */
.bt { margin: 22px 0 8px; }
.bt-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.bt-chips button { font-family: inherit; font-size: 14px; padding: 6px 12px; border: 1px solid var(--rule); background: var(--paper); color: var(--ink-dim); border-radius: 3px; cursor: pointer; }
.bt-chips button.on { background: var(--true-bg); color: var(--forest); border-color: var(--brass); font-weight: 600; }
.bt-legend { display: flex; flex-wrap: wrap; gap: 16px; font-size: 14px; margin-bottom: 6px; }
.bt-legend span::before { content: ""; display: inline-block; width: 18px; height: 3px; margin-right: 6px; vertical-align: middle; background: var(--c); }
.bt-legend span.dash::before { background: repeating-linear-gradient(90deg, var(--c) 0 5px, transparent 5px 8px); }
.bt-chart { position: relative; width: 100%; }
.bt-chart svg { display: block; width: 100%; }
.bt-tip { position: absolute; top: 8px; pointer-events: none; background: #fff; border: 1px solid var(--rule); border-radius: 6px; padding: 6px 9px; font-size: 13px; line-height: 1.4; box-shadow: 0 2px 8px rgba(0,0,0,.12); display: none; white-space: nowrap; z-index: 5; }
.bt-note, article p.fine { font-size: 14px; color: var(--ink-dim); margin: 8px 0 0; }
table.record td.num { white-space: nowrap; }