:root {
  --bg: #050506;
  --panel: #0a0a0c;
  --ink: #e4e5e0;
  --dim: #8d9096;
  --mute: #8a8d93;
  --line: #1a1b1e;
  --line-2: #2c2e33;
  --up: #ff5a5a;
  --down: #3dcc8a;
  --calm: #2bcaa8;
  --watch: #d2b04a;
  --elev: #e88732;
  --fear: #ef3d3d;
  --ext: #ff2d62;
  --pad: clamp(0.9rem, 2.4vw, 2rem);
  --mono: ui-monospace, "SFMono-Regular", "Cascadia Mono", "Cascadia Code",
    "Segoe UI Mono", "Liberation Mono", Menlo, Monaco, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--mono);
  font-feature-settings: "tnum" 1;
  font-variant-numeric: tabular-nums lining-nums;
}
html { color-scheme: dark; }
body { min-height: 100vh; }
::selection { background: #2a1010; color: var(--ink); }

a { color: var(--ink); text-underline-offset: 0.2em; }
a:hover { color: #fff; }
a:focus-visible { outline: 1px solid var(--ink); outline-offset: 2px; }

.skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ink);
  color: var(--bg);
  padding: 0.4rem 0.8rem;
}
.skip:focus { left: 0.6rem; top: 0.6rem; z-index: 2; }

.mast {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: baseline;
  padding: 0.7rem var(--pad);
  border-bottom: 1px solid var(--line);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--dim);
}
.mast-left, .mast-right, .mast-nav { display: flex; gap: 0.55rem; flex-wrap: wrap; }
.mast-nav a { color: var(--dim); text-decoration: none; }
.mast-nav a:hover { color: var(--ink); }
.mark { color: var(--ink); letter-spacing: 0.22em; }
.sep { color: var(--mute); }

main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 1.6rem var(--pad) 4rem;
}

.kicker {
  margin: 0 0 0.35rem;
  color: var(--dim);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  font-size: 0.68rem;
}

.instrument {
  display: grid;
  grid-template-columns: 11rem minmax(0, 1fr) 11rem;
  gap: 1rem 1.2rem;
  align-items: center;
  border-bottom: 1px solid var(--line);
  padding-bottom: 1.4rem;
}

.flank {
  margin: 0;
  display: grid;
  gap: 0.7rem;
}
.flank div { display: grid; gap: 0.2rem; }
.flank dt {
  margin: 0;
  color: var(--mute);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.flank dd { margin: 0; color: var(--ink); font-size: 0.92rem; }
.flank dd.up { color: var(--up); }
.flank dd.down { color: var(--down); }
.flank dd.flat { color: var(--dim); }
.up { color: var(--up); }
.down { color: var(--down); }
.flat { color: var(--dim); }

.tape {
  margin: 0;
}

.band-calm { color: var(--calm); }
.band-watchful { color: var(--watch); }
.band-elevated { color: var(--elev); }
.band-fearful { color: var(--fear); }
.band-extreme { color: var(--ext); }

.chart { margin-top: 1.6rem; }
.sec-head {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: baseline;
  margin-bottom: 0.55rem;
}
h2 {
  margin: 0;
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.hint { margin: 0; color: var(--mute); font-size: 0.68rem; }

#spark {
  display: block;
  width: 100%;
  height: auto;
  background: var(--panel);
  border: 1px solid var(--line);
  color: var(--dim);
}
body[data-band="calm"] #spark { color: var(--calm); }
body[data-band="watchful"] #spark { color: var(--watch); }
body[data-band="elevated"] #spark { color: var(--elev); }
body[data-band="fearful"] #spark { color: var(--fear); }
body[data-band="extreme"] #spark { color: var(--ext); }

#spark .grid { stroke: var(--line); stroke-width: 1; }
#spark .grid-mid { stroke: var(--line-2); }
#spark .glab {
  fill: var(--mute);
  font-size: 13px;
  text-anchor: end;
  font-family: var(--mono);
}
#spark .line { fill: none; stroke: currentColor; stroke-width: 2; }
#spark .fill { fill: currentColor; opacity: 0.12; }
#spark .dot { fill: currentColor; }
#spark .xlab {
  fill: var(--mute);
  font-size: 13px;
  font-family: var(--mono);
}
#spark .xlab.end { text-anchor: end; }

.scale { margin-top: 1rem; }
.scale-track {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  height: 8px;
  border: 1px solid var(--line-2);
}
.seg { display: block; }
.seg.calm { background: var(--calm); }
.seg.watch { background: var(--watch); }
.seg.elev { background: var(--elev); }
.seg.fear { background: var(--fear); }
.seg.ext { background: var(--ext); }
.needle {
  position: absolute;
  top: -5px;
  bottom: -5px;
  width: 2px;
  margin-left: -1px;
  background: #fff;
  outline: 1px solid #000;
}

.legend {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  list-style: none;
  margin: 0.55rem 0 0;
  padding: 0;
  color: var(--dim);
  font-size: 0.68rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.legend li { padding: 0.25rem 0.2rem 0; border-top: 1px solid transparent; }
.legend li.is-on {
  color: var(--ink);
  border-top-color: currentColor;
}

#sources, #method { margin-top: 2.4rem; }

.table-wrap { overflow-x: auto; border-top: 1px solid var(--line); }
table { width: 100%; border-collapse: collapse; font-size: 0.82rem; }
th, td {
  padding: 0.62rem 0.5rem 0.62rem 0;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
th {
  color: var(--mute);
  font-weight: 500;
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
th.num, td.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}
td.num {
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: 0;
  text-transform: none;
}
td.flag { text-align: right; letter-spacing: 0.12em; }
tr.drop td { color: var(--mute); }
tr.drop td.flag { color: var(--elev); }

.formula {
  margin: 0 0 1rem;
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.7;
  overflow-x: auto;
}
.steps {
  margin: 0 0 1rem;
  padding-left: 1.2rem;
  color: var(--dim);
  line-height: 1.55;
  max-width: 46rem;
  font-size: 0.84rem;
}
.steps li { margin: 0.35rem 0; }
.fine {
  color: var(--mute);
  font-size: 0.75rem;
  max-width: 46rem;
  line-height: 1.5;
}
.fine a { color: var(--dim); }

footer {
  border-top: 1px solid var(--line);
  padding: 0.8rem var(--pad);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--mute);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
footer a { color: var(--dim); text-decoration: none; }
footer a:hover { color: var(--ink); }

.noscript {
  margin: 0;
  padding: 0.8rem var(--pad);
  color: var(--fear);
  font-size: 0.8rem;
}

@media (max-width: 720px) {
  .instrument { grid-template-columns: 1fr; }
  .flank {
    grid-template-columns: repeat(3, 1fr);
    border-top: 1px solid var(--line);
    padding-top: 0.8rem;
  }
  .gauge-shell { order: -1; }
  .legend {
    grid-template-columns: repeat(5, 1fr);
    font-size: 0.55rem;
    gap: 0.15rem;
  }
  .sec-head { flex-direction: column; gap: 0.25rem; }
  .mast { flex-direction: column; gap: 0.25rem; }
}