/* Palette validated for CVD separation in both modes with the dataviz
   validator: worst all-pairs dE 9.2 light / 9.4 dark. Do not re-step
   individual series colours without re-running it. */
:root{
  --bg:#F3F5F6;
  --surface-1:#FCFCFB;
  --surface-2:#F0F1EF;
  --text-primary:#0B0B0B;
  --text-secondary:#52514E;
  --text-muted:#86857F;
  --rule:#E0E2E0;
  --grid:#EBEDEB;
  --s-wti:#2a78d6;
  --s-brent:#eb6834;
  --s-spread:#1baf7a;
  --st-good:#0ca30c;
  --st-warning:#fab219;
  --st-serious:#ec835a;
  --st-critical:#d03b3b;
  --shadow:0 1px 2px rgba(11,11,11,.05),0 8px 20px rgba(11,11,11,.04);
  --serif:"Source Serif 4",Georgia,serif;
  --sans:"Public Sans","Helvetica Neue",Arial,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#111111; --surface-1:#1A1A19; --surface-2:#232322;
    --text-primary:#FFFFFF; --text-secondary:#C3C2B7; --text-muted:#8B8A82;
    --rule:#2E2E2B; --grid:#262624;
    --s-wti:#3987e5; --s-brent:#d95926; --s-spread:#199e70;
    --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 20px rgba(0,0,0,.3);
  }
}
:root[data-theme="dark"]{
  --bg:#111111; --surface-1:#1A1A19; --surface-2:#232322;
  --text-primary:#FFFFFF; --text-secondary:#C3C2B7; --text-muted:#8B8A82;
  --rule:#2E2E2B; --grid:#262624;
  --s-wti:#3987e5; --s-brent:#d95926; --s-spread:#199e70;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 20px rgba(0,0,0,.3);
}
*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--bg);color:var(--text-primary);
  font-family:var(--sans);font-size:15px;line-height:1.55;-webkit-font-smoothing:antialiased}
.wrap{max-width:1140px;margin:0 auto;padding-inline:16px;padding-block:28px 48px}

.mast{display:flex;flex-wrap:wrap;gap:14px 28px;align-items:flex-end;justify-content:space-between;
  padding-bottom:16px;border-bottom:2px solid var(--text-primary)}
.mast h1{font-family:var(--sans);font-weight:600;font-size:clamp(26px,4.4vw,38px);
  letter-spacing:-.028em;margin:0;line-height:1}
.mast h1 span{color:var(--text-muted);font-weight:500}
.mast p{margin:5px 0 0;font-family:var(--serif);font-size:16px;color:var(--text-secondary);max-width:56ch}
.asof{font-family:var(--mono);font-size:11.5px;color:var(--text-muted);text-align:right;line-height:1.7}
.asof b{color:var(--text-secondary);font-weight:500}

/* hero: today's spread against its own five-year range */
.hero{margin-top:22px;background:var(--surface-1);border:1px solid var(--rule);
  box-shadow:var(--shadow);padding:18px 18px 20px;
  display:grid;grid-template-columns:minmax(0,auto) minmax(240px,1fr);gap:18px 34px;align-items:center}
@media (max-width:720px){.hero{grid-template-columns:minmax(0,1fr)}}
.hero .lab{font-size:11px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;
  color:var(--text-muted)}
.hero .big{font-family:var(--mono);font-weight:600;font-size:clamp(40px,8vw,62px);
  letter-spacing:-.035em;font-variant-numeric:tabular-nums;line-height:1;margin-top:4px}
.hero .sub{font-family:var(--mono);font-size:13px;color:var(--text-secondary);margin-top:7px;
  font-variant-numeric:tabular-nums;display:flex;gap:9px;align-items:center;flex-wrap:wrap}
.hero .sub .arrow{font-family:var(--sans);font-size:11px}

.rail{min-width:0}
.rail .cap{display:flex;justify-content:space-between;font-family:var(--mono);font-size:10.5px;
  color:var(--text-muted);margin-bottom:6px;letter-spacing:.04em;gap:10px}
.rail .track{position:relative;height:9px;background:var(--surface-2);border:1px solid var(--rule);
  border-radius:5px}
.rail .fillbar{position:absolute;inset:0 auto 0 0;background:var(--s-spread);opacity:.26;
  border-radius:5px 0 0 5px}
.rail .mark{position:absolute;top:-4px;width:3px;height:17px;background:var(--text-primary);
  border-radius:2px;transform:translateX(-1.5px)}
.rail .zero{position:absolute;top:-2px;width:1px;height:13px;background:var(--text-muted);opacity:.7}
.rail .note{margin-top:9px;font-family:var(--serif);font-size:13.5px;color:var(--text-secondary)}
.rail .note code{font-family:var(--mono);font-size:12px;color:var(--text-primary);
  font-variant-numeric:tabular-nums}

.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1px;
  background:var(--rule);border:1px solid var(--rule);margin-top:20px}
.tile{background:var(--surface-1);padding:14px 16px 15px;display:flex;flex-direction:column;gap:2px}
.tile .k{font-size:11px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;color:var(--text-muted)}
.tile .k em{font-style:normal;font-weight:400;letter-spacing:.04em;text-transform:none}
.tile .v{font-family:var(--mono);font-weight:600;font-size:clamp(23px,3.4vw,29px);
  letter-spacing:-.02em;font-variant-numeric:tabular-nums;line-height:1.15}
.chg{font-family:var(--mono);font-size:12.5px;font-variant-numeric:tabular-nums;
  display:flex;align-items:center;gap:6px;color:var(--text-secondary)}
.chg .arrow{font-family:var(--sans);font-size:11px}
.spark{display:block;width:100%;height:30px;margin-top:4px}

.signals{margin-top:20px;display:flex;flex-direction:column;gap:1px;background:var(--rule);
  border:1px solid var(--rule)}
.sig{background:var(--surface-1);padding:11px 14px;display:flex;gap:11px;align-items:flex-start}
.sig .ico{flex:0 0 auto;width:19px;height:19px;border-radius:50%;display:grid;place-items:center;
  font-size:11px;font-weight:700;color:#FFF;margin-top:1px;font-family:var(--sans)}
.sig .ico.warning{background:var(--st-warning);color:#2A1F00}
.sig .ico.serious{background:var(--st-serious)}
.sig .ico.critical{background:var(--st-critical)}
.sig .ico.good{background:var(--st-good)}
.sig .tx{min-width:0}
.sig .tx b{display:block;font-size:13.5px;font-weight:600;letter-spacing:-.005em}
.sig .tx span{display:block;font-size:13px;color:var(--text-secondary);font-family:var(--serif)}
.sig .tx span code{font-family:var(--mono);font-size:12px;font-variant-numeric:tabular-nums;
  color:var(--text-primary)}

.card{background:var(--surface-1);border:1px solid var(--rule);margin-top:20px;box-shadow:var(--shadow)}
.card > header{display:flex;flex-wrap:wrap;gap:10px 18px;align-items:baseline;justify-content:space-between;
  padding:14px 16px 10px;border-bottom:1px solid var(--rule)}
.card h2{font-family:var(--serif);font-weight:600;font-size:19px;margin:0;letter-spacing:-.01em}
.card h2 + p{margin:2px 0 0;font-size:13px;color:var(--text-secondary);font-family:var(--serif)}
.body{padding:14px 16px 16px}

.ctrls{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.ctrls .grp{display:flex;border:1px solid var(--rule);border-radius:3px;overflow:hidden}
.ctrls button{font-family:var(--mono);font-size:11.5px;font-weight:500;letter-spacing:.03em;
  background:var(--surface-1);color:var(--text-secondary);border:0;border-right:1px solid var(--rule);
  padding:5px 10px;cursor:pointer}
.ctrls .grp button:last-child{border-right:0}
.ctrls button:hover{background:var(--surface-2);color:var(--text-primary)}
.ctrls button[aria-pressed=true]{background:var(--text-primary);color:var(--surface-1)}
.ctrls button:focus-visible{outline:2px solid var(--s-wti);outline-offset:-2px}

.legend{display:flex;flex-wrap:wrap;gap:6px 18px;align-items:center;margin-bottom:10px}
.legend span{display:flex;align-items:center;gap:7px;font-size:12.5px;color:var(--text-secondary)}
.legend i{width:13px;height:3px;border-radius:2px;flex:0 0 auto}
.legend b{font-family:var(--mono);font-weight:500;color:var(--text-primary);font-variant-numeric:tabular-nums}

.plot{position:relative;width:100%}
.plot svg{display:block;width:100%;overflow:visible}
.tip{position:absolute;pointer-events:none;background:var(--surface-1);border:1px solid var(--rule);
  box-shadow:var(--shadow);padding:7px 10px;font-family:var(--mono);font-size:11.5px;
  font-variant-numeric:tabular-nums;min-width:132px;z-index:5;border-radius:3px;line-height:1.6}
.tip .d{color:var(--text-muted);font-size:10.5px;letter-spacing:.04em;margin-bottom:3px}
.tip .r{display:flex;align-items:center;gap:7px;justify-content:space-between;color:var(--text-secondary)}
.tip .r i{width:9px;height:3px;border-radius:2px;flex:0 0 auto}
.tip .r b{color:var(--text-primary);font-weight:600}
.tip .r .nm{display:flex;align-items:center;gap:6px;min-width:0}

.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(118px,1fr));gap:0 20px;
  margin-top:12px;padding-top:12px;border-top:1px solid var(--rule)}
.stats div{display:flex;flex-direction:column;gap:1px;padding:3px 0}
.stats dt{font-size:10.5px;letter-spacing:.09em;text-transform:uppercase;color:var(--text-muted);font-weight:600}
.stats dd{margin:0;font-family:var(--mono);font-size:14.5px;font-weight:500;
  font-variant-numeric:tabular-nums}

.minis{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px;margin-top:20px}
.minis .card{margin-top:0}

.tblwrap{overflow-x:auto;margin-top:14px;border-top:1px solid var(--rule);padding-top:12px}
table{border-collapse:collapse;width:100%;font-family:var(--mono);font-size:12px;
  font-variant-numeric:tabular-nums}
caption{text-align:left;font-family:var(--sans);font-size:12px;color:var(--text-muted);
  padding-bottom:8px}
th,td{text-align:right;padding:5px 10px;border-bottom:1px solid var(--grid);white-space:nowrap}
th{color:var(--text-muted);font-weight:600;font-size:10.5px;letter-spacing:.08em;text-transform:uppercase;
  position:sticky;top:0;background:var(--surface-1)}
th:first-child,td:first-child{text-align:left}

.state{padding:30px 16px;text-align:center;font-family:var(--mono);font-size:13px;
  color:var(--text-muted)}
.state.err{color:var(--st-critical)}
.state button{margin-top:12px;font-family:var(--mono);font-size:12px;background:var(--text-primary);
  color:var(--surface-1);border:0;border-radius:3px;padding:7px 14px;cursor:pointer}

footer{margin-top:34px;padding-top:16px;border-top:1px solid var(--rule);
  display:flex;flex-wrap:wrap;gap:10px 26px;justify-content:space-between;align-items:baseline}
footer .dom{font-family:var(--sans);font-weight:600;font-size:14px;letter-spacing:-.01em}
footer p{margin:0;font-size:12.5px;color:var(--text-muted);max-width:64ch;font-family:var(--serif)}
@media (prefers-reduced-motion:reduce){*{transition-duration:.001ms!important}}