/* learn.css -- knowledge base pages */
.kb, .kb-index {
  --kb-head: "Archivo", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --kb-body: "Source Serif 4", Georgia, "Times New Roman", serif;
  --x-bright: #3fd160;
  --o-bright: #f0524f;
  --amber: #d29922;
  font-family: var(--kb-head);
}
main:has(.kb), main:has(.kb-index) { max-width: 1160px; }

.kb h1, .kb h2, .kb-index h1, .kb-index h2 {
  font-family: var(--kb-head);
  font-stretch: 112%;
  font-weight: 800;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

/* ---------- article layout ---------- */
.kb { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 56px; align-items: start; }

.kb-side { position: sticky; top: 20px; max-height: calc(100vh - 40px); overflow-y: auto; padding-right: 8px; font-size: 14px; }
.kb-home { display: block; font-weight: 700; color: var(--text); margin-bottom: 18px; }
.kb-side h3 { font-size: 13px; color: var(--muted); font-weight: 600; margin: 18px 0 6px; }
.kb-side ul { list-style: none; margin: 0; padding: 0; }
.kb-side li a { display: block; padding: 5px 10px; border-radius: 6px; color: var(--text); opacity: 0.82; }
.kb-side li a:hover { background: var(--panel); text-decoration: none; opacity: 1; }
.kb-side li a[aria-current="page"] { background: var(--panel-2); opacity: 1; box-shadow: inset 3px 0 0 var(--x); }

.kb-article { max-width: 700px; }
.kb-crumb { font-size: 13px; color: var(--muted); margin: 0 0 10px; }
.kb-article h1 { font-size: clamp(32px, 4.4vw, 46px); line-height: 1.05; margin: 0 0 12px; }
.kb-dek { font-size: 19px; color: var(--muted); margin: 0 0 32px; line-height: 1.5; }
.kb-article h2 { font-size: 24px; line-height: 1.2; margin: 44px 0 12px; }
.kb-article h3 { font-size: 18px; margin: 28px 0 8px; }

.kb-article p, .kb-article li, .kb-article td {
  font-family: var(--kb-body);
  font-size: 18px;
  line-height: 1.68;
  color: #d5dce4;
}
.kb-article p { margin: 0 0 18px; }
.kb-article ul, .kb-article ol { padding-left: 1.3em; margin: 0 0 20px; }
.kb-article li { margin-bottom: 8px; }
.kb-article strong { color: var(--text); }
.kb-article a { text-decoration: underline; text-decoration-color: rgba(88,166,255,.4); text-underline-offset: 3px; }

.kb-rule {
  border-left: 3px solid var(--x);
  background: var(--panel);
  border-radius: 0 10px 10px 0;
  padding: 16px 20px;
  margin: 24px 0;
}
.kb-rule p:last-child, .kb-rule ul:last-child { margin-bottom: 0; }
.kb-rule.sell { border-left-color: var(--o-bright); }
.kb-rule.caution { border-left-color: var(--amber); }
.kb-rule-title { font-family: var(--kb-head) !important; font-weight: 700; font-size: 15px !important; color: var(--text) !important; margin-bottom: 6px !important; }

.kb-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 24px 0; }
.kb-pair .kb-fig { margin: 0; }

.kb-table { width: 100%; border-collapse: collapse; margin: 20px 0 28px; }
.kb-table th { text-align: left; font-size: 13px; color: var(--muted); font-weight: 600; padding: 8px 10px; border-bottom: 1px solid var(--grid); }
.kb-table td { font-size: 16px !important; padding: 8px 10px; border-bottom: 1px solid var(--grid); font-variant-numeric: tabular-nums; vertical-align: top; }

.kb-gloss dt { font-family: var(--kb-head); font-weight: 700; margin-top: 18px; }
.kb-gloss dd { margin: 4px 0 0; font-family: var(--kb-body); font-size: 17px; line-height: 1.6; color: #d5dce4; }

.kb-try {
  margin: 48px 0 24px;
  padding: 22px 24px;
  background: var(--panel);
  border: 1px solid var(--grid);
  border-radius: 12px;
  display: flex; flex-wrap: wrap; gap: 16px; align-items: center; justify-content: space-between;
}
.kb-try p { margin: 0 !important; font-family: var(--kb-head) !important; font-weight: 600; }

.kb-pager { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.kb-pager a {
  display: block; padding: 14px 16px; border: 1px solid var(--grid); border-radius: 10px;
  color: var(--text); text-decoration: none !important; font-weight: 600; font-size: 15px;
}
.kb-pager a:hover { border-color: var(--muted); }
.kb-pager a span { display: block; color: var(--muted); font-size: 13px; font-weight: 400; margin-bottom: 2px; }
.kb-pager .next { text-align: right; grid-column: 2; }
.kb-note { color: var(--muted) !important; font-size: 13px !important; font-family: var(--kb-head) !important; margin-top: 28px !important; }

/* ---------- chart figures ---------- */
.kb-fig { margin: 28px 0; background: var(--panel); border: 1px solid var(--grid); border-radius: 12px; padding: 14px 16px 12px; }
.kb-chart { width: 100%; height: auto; display: block; margin: 0 auto; }
.kb-fig figcaption { font-family: var(--kb-head); font-size: 14px; color: var(--muted); margin-top: 8px; }
.kb-chart .g { stroke: var(--grid); stroke-width: 1; }
.kb-chart .ax { fill: var(--muted); font: 10px var(--kb-head); }
.kb-chart .mx { stroke: var(--x-bright); stroke-width: 2.2; stroke-linecap: round; fill: none; }
.kb-chart .mo { stroke: var(--o-bright); stroke-width: 2; fill: none; }
.kb-chart .mm { fill: var(--accent); font: 700 13px var(--kb-head); }
.kb-chart .ln { stroke-width: 1.5; stroke-dasharray: 5 4; }
.kb-chart .ln.resist, .kb-chart .lb.resist { stroke: var(--amber); }
.kb-chart .ln.support { stroke: var(--accent); }
.kb-chart .lb { font: 10px var(--kb-head); stroke: none; }
.kb-chart .lb.resist { fill: var(--amber); }
.kb-chart .lb.support { fill: var(--accent); }
.kb-chart .tr { stroke: var(--accent); stroke-width: 2; stroke-linecap: round; }
.kb-chart .sg { fill: none; stroke-width: 1.6; }
.kb-chart .sg.buy { stroke: var(--x-bright); }
.kb-chart .sg.sell { stroke: var(--o-bright); }
.kb-chart .sg.warn { stroke: var(--amber); stroke-dasharray: 3 2; }
.kb-chart .sl { font: 700 11px var(--kb-head); }
.kb-chart .sl.buy { fill: var(--x-bright); }
.kb-chart .sl.sell { fill: var(--o-bright); }
.kb-chart .sl.warn { fill: var(--amber); }

/* ---------- index ---------- */
.kb-index-head { display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px; align-items: center; padding: 8px 0 40px; }
.kb-index-head h1 { font-size: clamp(36px, 5.4vw, 58px); line-height: 1.02; margin: 0 0 16px; }
.kb-index-head p { font-family: var(--kb-body); font-size: 19px; line-height: 1.6; color: var(--muted); margin: 0 0 26px; max-width: 32em; }
.kb-index-head .kb-fig { margin: 0; }
.kb-index-sec { border-top: 1px solid var(--grid); padding: 32px 0 12px; }
.kb-index-sec h2 { font-size: 24px; margin: 0 0 18px; }
.kb-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }
.kb-card {
  display: block; padding: 16px 18px; background: var(--panel); border: 1px solid var(--grid);
  border-radius: 10px; color: var(--text); text-decoration: none !important;
}
.kb-card:hover { border-color: var(--muted); }
.kb-card strong { display: block; font-size: 16px; margin-bottom: 4px; }
.kb-card span { color: var(--muted); font-size: 14px; line-height: 1.45; }

.kb a:focus-visible, .kb-index a:focus-visible { outline: 2px solid var(--text); outline-offset: 2px; }

@media (max-width: 900px) {
  .kb { grid-template-columns: 1fr; gap: 24px; }
  .kb-side { position: static; max-height: none; order: 2; border-top: 1px solid var(--grid); padding-top: 20px; }
  .kb-index-head { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .kb-pair, .kb-pager { grid-template-columns: 1fr; }
  .kb-pager .next { grid-column: 1; }
  .kb-article p, .kb-article li { font-size: 17px; }
  .site-header nav { gap: 12px; font-size: 14px; }
  main:has(.kb), main:has(.kb-index) { padding-left: 16px; padding-right: 16px; }
}
.kb-chart .ld { stroke-width: 1; stroke-dasharray: 2 2; opacity: 0.7; }
.kb-chart .ld.buy { stroke: var(--x-bright); }
.kb-chart .ld.sell { stroke: var(--o-bright); }
.kb-chart .ld.warn { stroke: var(--amber); }
.kb-crumb { font-family: var(--kb-head) !important; font-size: 13px !important; color: var(--muted) !important; }
.kb-crumb a { text-decoration: none !important; }
.kb-sources li { font-family: var(--kb-head) !important; font-size: 15px !important; }