:root {
  --bg: #f5f6f9;
  --panel: #ffffff;
  --elev: #f7f8fb;
  --line: #e4e7ef;
  --line-strong: #cdd3e0;
  --text: #1b2230;
  --muted: #69728a;
  --faint: #98a0b4;

  /* the three series */
  --bh: #1a6b5c;     /* buy & hold — teal (the lab accent) */
  --act: #d98a00;    /* active — gold */
  --sp: #8a90a3;     /* S&P 500 — grey */

  --up: #15935a;
  --down: #d23b3b;

  --radius: 16px;
  --shadow: 0 1px 2px rgba(20,30,50,.04), 0 8px 24px rgba(20,30,50,.06);
  --max: 940px;

  /* history-nav theming */
  --accent: var(--bh);
  font-synthesis: none;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background:
    radial-gradient(900px 460px at 12% -8%, #e7f1ee 0%, transparent 60%),
    radial-gradient(900px 460px at 90% -6%, #fbf1de 0%, transparent 62%),
    var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

main { max-width: var(--max); margin: 0 auto; padding: 24px 20px 64px; }

.back { display: inline-block; margin-bottom: 14px; color: var(--muted); font-size: .9rem; text-decoration: none; }
.back:hover { color: var(--bh); }

.masthead {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 12px; flex-wrap: wrap; padding-bottom: 16px;
  border-bottom: 1px solid var(--line); margin-bottom: 20px;
}
.brand { font-weight: 800; font-size: 1.2rem; letter-spacing: -.01em; }
.brand span { vertical-align: middle; }
.asof { color: var(--muted); font-size: .9rem; font-variant-numeric: tabular-nums; }

.intro { margin: 4px 0 22px; }
.eyebrow {
  text-transform: uppercase; letter-spacing: .12em; font-size: .72rem;
  font-weight: 700; color: var(--faint); margin-bottom: 8px;
}
.tagline { font-size: 1.6rem; line-height: 1.2; letter-spacing: -.02em; margin: 0 0 10px; }
.blurb { color: var(--muted); margin: 0; max-width: 64ch; }

/* ---- cards ---- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-bottom: 22px; }
.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 16px 18px; border-top: 3px solid var(--line-strong);
}
.card.bh { border-top-color: var(--bh); }
.card.act { border-top-color: var(--act); }
.card.sp { border-top-color: var(--sp); }
.card-key { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: .92rem; }
.card-ret { font-size: 2rem; font-weight: 800; letter-spacing: -.02em; margin: 6px 0 2px; font-variant-numeric: tabular-nums; }
.card-ret.up, .val.up, .ro-val.up, .card-vs.up { color: var(--up); }
.card-ret.down, .val.down, .ro-val.down, .card-vs.down { color: var(--down); }
.card-vs { font-size: .82rem; color: var(--muted); font-variant-numeric: tabular-nums; }

.swatch { width: 11px; height: 11px; border-radius: 3px; display: inline-block; flex: 0 0 auto; }
.swatch.bh { background: var(--bh); }
.swatch.act { background: var(--act); }
.swatch.sp { background: var(--sp); }

/* ---- panels ---- */
.panel {
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 18px 20px; margin-bottom: 20px;
}
.panel-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 14px; }
.panel-head h2 { font-size: 1.06rem; margin: 0; letter-spacing: -.01em; }
.panel-head .sub { color: var(--faint); font-size: .82rem; }
.legend { display: flex; gap: 14px; flex-wrap: wrap; }
.leg { display: inline-flex; align-items: center; gap: 6px; font-size: .82rem; color: var(--muted); }

/* ---- chart ---- */
.chart-wrap { position: relative; }
#chart { display: block; width: 100%; height: auto; }
.series { fill: none; stroke-width: 2.4; stroke-linejoin: round; stroke-linecap: round; }
/* Buy & hold is drawn first and a touch wider, so it reads as a halo behind the
   active line wherever the two coincide (they're identical until the first trade);
   once they diverge, both are clearly distinct. */
.series.bh { stroke: var(--bh); stroke-width: 5; }
.series.act { stroke: var(--act); stroke-width: 2.2; }
.series.sp { stroke: var(--sp); stroke-dasharray: 5 4; stroke-width: 2; }
.grid { stroke: var(--line); stroke-width: 1; }
.base { stroke: var(--line-strong); stroke-width: 1; stroke-dasharray: 2 3; }
.guide { stroke: var(--line-strong); stroke-width: 1; stroke-dasharray: 3 3; pointer-events: none; }
.reb { fill: #fff; stroke: var(--act); stroke-width: 2; }
text.axis { fill: var(--faint); font-size: 11px; font-variant-numeric: tabular-nums; }
text.axis.y { text-anchor: end; }
text.axis.x { text-anchor: middle; }

.readout {
  position: absolute; top: 8px; right: 8px; background: rgba(255,255,255,.94);
  border: 1px solid var(--line); border-radius: 10px; padding: 8px 10px;
  box-shadow: var(--shadow); font-size: .8rem; min-width: 132px; backdrop-filter: blur(3px);
}
.ro-date { font-weight: 700; margin-bottom: 5px; }
.ro-yr { color: var(--faint); font-weight: 500; }
.ro-row { display: flex; align-items: center; gap: 6px; line-height: 1.5; }
.ro-lab { color: var(--muted); flex: 1; }
.ro-val { font-variant-numeric: tabular-nums; font-weight: 700; }

#historyNav { margin-top: 14px; }

/* ---- holdings table ---- */
.table-wrap { overflow-x: auto; }
table.holdings { width: 100%; border-collapse: collapse; font-size: .9rem; }
.holdings th { text-align: left; color: var(--faint); font-weight: 600; font-size: .76rem; text-transform: uppercase; letter-spacing: .06em; padding: 0 10px 8px; border-bottom: 1px solid var(--line); }
.holdings th.num, .holdings td.num { text-align: right; font-variant-numeric: tabular-nums; }
.holdings td { padding: 9px 10px; border-bottom: 1px solid var(--line); vertical-align: middle; }
.holdings tr:last-child td { border-bottom: none; }
.stock .tk { font-weight: 700; margin-right: 8px; }
.stock .nm { color: var(--text); }
.stock .ly { display: block; color: var(--faint); font-size: .72rem; margin-top: 1px; }
td.ytd { position: relative; }
td.ytd .bar { position: absolute; left: 10px; bottom: 4px; height: 3px; border-radius: 2px; opacity: .5; }
td.ytd .bar.up { background: var(--up); }
td.ytd .bar.down { background: var(--down); }
td.ytd .val { font-weight: 700; }
tr.cash td { color: var(--muted); }
tr.cash .tk { color: var(--act); }

/* ---- decisions ---- */
.decisions { display: flex; flex-direction: column; gap: 14px; }
.decision { border-left: 3px solid var(--act); padding: 2px 0 2px 14px; }
.dec-head { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; margin-bottom: 4px; }
.dec-date { font-variant-numeric: tabular-nums; color: var(--muted); font-size: .82rem; }
.dec-label { font-weight: 700; }
.dec-why { margin: 0; color: var(--text); font-size: .92rem; }

.foot { color: var(--faint); font-size: .8rem; margin-top: 26px; }
.foot p { margin: 4px 0; }
.foot a { color: var(--bh); }

@media (max-width: 620px) {
  .cards { grid-template-columns: 1fr; }
  .tagline { font-size: 1.32rem; }
  .stock .nm { display: none; }
  .readout { position: static; margin-top: 10px; min-width: 0; }
}