:root {
  --bg: #f5f6f8; --surface: #ffffff; --ink: #151a23; --mute: #5d6675; --line: #dde1e8;
  --accent: #0a6c68; --accent-ink: #ffffff; --buy: #12795a; --sell: #b3412a;
  --buy-bg: #e1f3ec; --sell-bg: #f8e6e1; --bar: #0a6c68; --line-a: #0a6c68; --line-b: #b3412a;
  color-scheme: light;
}
/* Dark follows the system unless the visitor chose a theme with the toggle (data-theme on <html>). */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f141b; --surface: #171e28; --ink: #e8ecf2; --mute: #9aa4b5; --line: #2a3442;
    --accent: #4cc3bb; --accent-ink: #06201e; --buy: #5fd4a8; --sell: #f08a72;
    --buy-bg: #14382d; --sell-bg: #3d2119; --bar: #4cc3bb; --line-a: #4cc3bb; --line-b: #f08a72;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
    --bg: #0f141b; --surface: #171e28; --ink: #e8ecf2; --mute: #9aa4b5; --line: #2a3442;
    --accent: #4cc3bb; --accent-ink: #06201e; --buy: #5fd4a8; --sell: #f08a72;
    --buy-bg: #14382d; --sell-bg: #3d2119; --bar: #4cc3bb; --line-a: #4cc3bb; --line-b: #f08a72;
    color-scheme: dark;
}
.theme-toggle { display: inline-flex; align-items: center; justify-content: center; width: 38px; height: 38px; padding: 0; border: 0; border-radius: 8px; background: none; color: var(--ink); cursor: pointer; }
.theme-toggle:hover { background: var(--bg); color: var(--accent); }
.theme-toggle .sun { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .moon { display: none; }
  :root:not([data-theme="light"]) .theme-toggle .sun { display: inline; }
}
:root[data-theme="dark"] .theme-toggle .moon { display: none; }
:root[data-theme="dark"] .theme-toggle .sun { display: inline; }
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
.wrap { max-width: 1040px; margin: 0 auto; padding-inline: max(16px, env(safe-area-inset-left, 0px)) max(16px, env(safe-area-inset-right, 0px)); }
.sr { position: absolute; left: -9999px; }
a { color: var(--accent); text-underline-offset: 2px; }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.top { background: var(--surface); border-bottom: 1px solid var(--line); }
.bar { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 24px; padding-block: 12px; }
.brand { display: inline-flex; align-items: center; gap: 9px; font-weight: 800; font-size: 1.2rem; letter-spacing: -0.02em; color: var(--ink); text-decoration: none; }
nav a { margin-right: 16px; color: var(--ink); text-decoration: none; font-weight: 500; }
nav a:hover { color: var(--accent); }
.search { display: flex; gap: 6px; min-width: 0; }
.search input { flex: 1; min-width: 0; padding: 7px 10px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--ink); font: inherit; }
.search-open { margin-left: auto; display: inline-flex; align-items: center; justify-content: center; width: 38px; height: 38px; border-radius: 8px; color: var(--ink); }
.search-open:hover { background: var(--bg); color: var(--accent); }
.search-dialog { width: min(92vw, 520px); margin: 12vh auto 0; padding: 16px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); color: var(--ink); box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3); }
.search-dialog::backdrop { background: rgba(8, 12, 18, 0.55); }
.search-dialog input { padding: 10px 12px; font-size: 1rem; }
.page-search { max-width: 520px; margin-bottom: 8px; }
.search button { padding: 7px 14px; border: 0; border-radius: 6px; background: var(--accent); color: var(--accent-ink); font: inherit; font-weight: 600; cursor: pointer; }
main { padding-block: 24px 48px; }
h1 { font-size: clamp(1.6rem, 4vw, 2.3rem); line-height: 1.15; letter-spacing: -0.025em; margin: 8px 0 12px; text-wrap: balance; }
h2 { font-size: 1.25rem; margin: 32px 0 10px; letter-spacing: -0.01em; }
.lead { font-size: 1.08rem; color: var(--mute); max-width: 68ch; }
.hero { padding-block: 16px 8px; }
.faq dt { font-weight: 600; margin-top: 14px; }
.faq dd { margin: 4px 0 0; max-width: 70ch; }
.cols { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 32px; }
.crumbs { font-size: 0.88rem; color: var(--mute); }
.crumbs a { color: var(--mute); }
.stats { display: flex; flex-wrap: wrap; gap: 12px; margin: 20px 0 4px; }
.stats div { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 10px 16px; min-width: 120px; }
.stats b { display: block; font-size: 1.5rem; letter-spacing: -0.02em; }
.stats span { color: var(--mute); font-size: 0.85rem; }
table.data { width: 100%; border-collapse: collapse; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; font-size: 0.93rem; }
.data th, .data td { text-align: left; padding: 8px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
.data th { font-size: 0.8rem; color: var(--mute); font-weight: 600; background: var(--bg); }
.data tr:last-child td { border-bottom: 0; }
.data .r { text-align: right; font-variant-numeric: tabular-nums; }
.scroll { overflow-x: auto; }
.mute { color: var(--mute); font-size: 0.88em; }
.note { color: var(--mute); font-size: 0.85rem; margin: 4px 0 0; }
.tag { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 0.78rem; font-weight: 600; white-space: nowrap; }
.tag.buy { background: var(--buy-bg); color: var(--buy); }
.tag.sell { background: var(--sell-bg); color: var(--sell); }
.chart { width: 100%; height: auto; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; }
.chart .grid { stroke: var(--line); stroke-width: 1; }
.chart .axis { fill: var(--mute); font-size: 10px; }
.chart .bar { fill: var(--bar); }
.heatmap { width: 100%; height: auto; }
.heatmap .axis { fill: var(--mute); font-size: 10px; }
.heatmap .cell.empty { fill: var(--line); fill-opacity: 0.35; }
.heatmap .cell.buy { fill: var(--buy); }
.heatmap .cell.sell { fill: var(--sell); }
.heatmap .cell.mix, .heatmap .cell.count { fill: var(--accent); }
.chart .dot { stroke: var(--surface); stroke-width: 0.8; }
.chart .dot.buy { fill: var(--buy); }
.chart .dot.sell { fill: var(--sell); }
.chart .line { fill: none; stroke-width: 2; stroke-linejoin: round; }
.chart .line.a { stroke: var(--line-a); }
.chart .line.b { stroke: var(--line-b); }
.pager { display: flex; gap: 16px; align-items: center; margin-top: 12px; }
ul.plain { list-style: none; padding: 0; }
ul.plain li { padding: 4px 0; }
.foot { border-top: 1px solid var(--line); color: var(--mute); font-size: 0.85rem; padding-block: 8px 32px; }
@media (max-width: 720px) { .cols { grid-template-columns: 1fr; } }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 8px 0 16px; }
.chips a { padding: 4px 12px; border: 1px solid var(--line); border-radius: 999px; background: var(--surface); color: var(--ink); text-decoration: none; font-size: 0.9rem; }
.chips a[aria-current="page"] { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 600; }
.up { color: var(--buy); }
.down { color: var(--sell); }
form.bt { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px 16px; align-items: end; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 16px; margin: 16px 0; }
form.bt label { display: flex; flex-direction: column; gap: 4px; font-size: 0.85rem; color: var(--mute); min-width: 0; }
form.bt input, form.bt select { padding: 8px 10px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--ink); font: inherit; min-width: 0; }
form.bt label.check { flex-direction: row; align-items: center; color: var(--ink); }
form.bt button { padding: 9px 16px; border: 0; border-radius: 6px; background: var(--accent); color: var(--accent-ink); font: inherit; font-weight: 600; cursor: pointer; }
.alert { background: var(--sell-bg); color: var(--sell); border-radius: 8px; padding: 10px 16px; margin: 12px 0; }
.alert ul { margin: 0; padding-left: 18px; }
.callout { background: var(--surface); border: 1px solid var(--line); border-left: 4px solid var(--accent); border-radius: 8px; padding: 4px 20px 8px; margin: 20px 0; }
.callout h2 { margin-top: 12px; }
a.cta { display: inline-block; padding: 8px 16px; border-radius: 6px; background: var(--accent); color: var(--accent-ink); font-weight: 600; text-decoration: none; }
a.cta:hover { filter: brightness(1.1); }
.price-chart { background: var(--surface); border: 1px solid var(--line); border-radius: 8px; padding: 8px 8px 4px; }
.pc-tools { display: flex; flex-wrap: wrap; gap: 6px; padding: 0 0 6px 2px; }
.pc-tools button { padding: 3px 10px; min-width: 34px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--ink); font: inherit; font-size: 0.85rem; cursor: pointer; }
.pc-tools button:hover { border-color: var(--accent); color: var(--accent); }
.pc-plot { width: 100%; }
.pc { display: block; width: 100%; height: auto; touch-action: pan-y; cursor: grab; user-select: none; }
.pc.grabbing { cursor: grabbing; }
.pc .grid { stroke: var(--line); stroke-width: 1; }
.pc .axis { fill: var(--mute); font-size: 10px; }
.pc .pc-line { fill: none; stroke: var(--line-a); stroke-width: 1.6; stroke-linejoin: round; }
.pc .pc-band { fill: var(--accent); fill-opacity: 0.2; }
.pc .dot { stroke: var(--surface); stroke-width: 1; }
.pc .dot.buy { fill: var(--buy); }
.pc .dot.sell { fill: var(--sell); }
.pc .dot.mix { fill: var(--accent); }
.pc .pc-cross line { stroke: var(--mute); stroke-width: 1; stroke-dasharray: 3 3; }
.heatmap .cell[data-ym]:hover { stroke: var(--ink); stroke-width: 1.5; }
.compare td.win { background: var(--buy-bg); color: var(--buy); font-weight: 600; }
.compare-form { display: flex; flex-wrap: wrap; gap: 12px; align-items: flex-end; margin: 12px 0 4px; }
.compare-form label { display: flex; flex-direction: column; gap: 4px; font-size: 0.9rem; color: var(--mute); flex: 1 1 220px; }
.compare-form input { padding: 9px 12px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--ink); font: inherit; }
.compare-form button { padding: 9px 18px; border: 0; border-radius: 6px; background: var(--accent); color: var(--accent-ink); font: inherit; font-weight: 600; cursor: pointer; }