:root{
  color-scheme:light dark;
  --bg:#f6f7fb; --panel:#fff; --text:#172033; --muted:#667085; --border:#d9dee8;
  --accent:#7c3aed; --accentSoft:#eee8ff; --good:#138a53; --goodSoft:#e2f7ec;
  --halfLink:#9a6a00; --halfLinkSoft:#f5ebc8;
  --point:#687386; --shadow:0 12px 30px rgba(0,0,0,.08);
  --page-gutter:max(20px,env(safe-area-inset-left,0px),env(safe-area-inset-right,0px));
}
@media(prefers-color-scheme:dark){
  :root{
    --bg:#111318; --panel:#1a1e27; --text:#f2f4f7; --muted:#a5adba; --border:#343a47;
    --accent:#b294ff; --accentSoft:#352d4c; --good:#5dd39e; --goodSoft:#183b2c;
    --halfLink:#c99a28; --halfLinkSoft:#3a3018;
    --point:#98a2b3; --shadow:0 12px 30px rgba(0,0,0,.25);
  }
}
*{box-sizing:border-box}
html,body{width:100%;min-width:0}
body{margin:0;overflow-x:hidden;background:var(--bg);color:var(--text);font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
main{width:100%;max-width:1220px;margin-inline:auto;padding:30px var(--page-gutter) 56px}
h1{margin:0;font-size:2.15rem;letter-spacing:-.03em}
h2{margin:0 0 14px;font-size:1.15rem}
.subtitle{margin-top:6px;color:var(--muted)}
.site-header{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:18px;
  flex-wrap:wrap;
}
.report-button{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 14px;
  border:1px solid var(--accent);
  border-radius:10px;
  background:var(--accent);
  color:#fff;
  font-weight:700;
  cursor:pointer;
  white-space:nowrap;
}
.report-button:hover{filter:brightness(1.06)}
.report-button:disabled{
  opacity:.6;
  cursor:wait;
  filter:none;
}
.report-icon{
  font-size:1rem;
  line-height:1;
}
.report-footer{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  flex-wrap:wrap;
  margin-top:26px;
  padding:18px 20px;
  border:1px solid var(--border);
  border-radius:14px;
  background:var(--panel);
}
.report-footer-copy{
  display:flex;
  flex-direction:column;
  gap:3px;
  min-width:0;
}
.report-footer-copy strong{
  color:var(--text);
  font-size:.95rem;
}
.report-footer-copy span{
  color:var(--muted);
  font-size:.82rem;
}
.install-app{
  display:grid;
  grid-template-columns:minmax(0,1fr) auto;
  align-items:center;
  gap:14px 20px;
  margin-top:14px;
  padding:18px 20px;
  border:1px solid color-mix(in srgb,var(--accent) 45%,var(--border));
  border-radius:14px;
  background:linear-gradient(135deg,var(--accentSoft),var(--panel));
}
.install-app-copy{
  display:flex;
  flex-direction:column;
  gap:3px;
  min-width:0;
}
.install-app-eyebrow{
  color:var(--accent);
  font-size:.72rem;
  font-weight:800;
  letter-spacing:.08em;
  text-transform:uppercase;
}
.install-app-copy strong{
  color:var(--text);
  font-size:.95rem;
}
.install-app-copy > span:last-child{
  color:var(--muted);
  font-size:.82rem;
}
.install-app-button{
  justify-content:center;
}
.install-icon{
  width:18px;
  height:18px;
  fill:none;
  stroke:currentColor;
  stroke-linecap:round;
  stroke-linejoin:round;
  stroke-width:2;
}
.install-app-help{
  grid-column:1 / -1;
  margin:0;
  padding-top:10px;
  border-top:1px solid color-mix(in srgb,var(--accent) 30%,var(--border));
  color:var(--text);
  font-size:.82rem;
  line-height:1.45;
}
[hidden]{display:none !important}
.site-footer{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  flex-wrap:wrap;
  margin-top:18px;
  padding:10px 4px 0;
  color:var(--muted);
  font-size:.8rem;
  text-align:center;
}
.site-footer a{
  color:var(--accent);
  text-decoration:none;
  font-weight:600;
}
.site-footer a:hover{
  text-decoration:underline;
}
.site-footer-separator{
  color:var(--border);
}
.panel{margin-top:22px;padding:20px;background:var(--panel);border:1px solid var(--border);border-radius:16px}
.unit-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  flex-wrap:wrap;
  margin-bottom:18px;
  padding-bottom:16px;
  border-bottom:1px solid var(--border)
}
.unit-controls{
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:14px;
  flex-wrap:wrap;
  margin-left:auto;
}
.unit-copy{
  margin:0;
  color:var(--muted);
  font-size:.8rem;
  text-align:right;
}
.unit-toggle{
  display:inline-flex;padding:3px;border:1px solid var(--border);border-radius:10px;background:var(--bg)
}
.unit-toggle button{
  border:0;border-radius:7px;padding:8px 14px;background:transparent;color:var(--muted);cursor:pointer
}
.unit-toggle button[aria-pressed="true"]{
  background:var(--accent);color:#fff;font-weight:700
}
.inputs{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:14px}
label,.field-label{display:flex;flex-direction:column;gap:6px;font-size:.88rem;color:var(--muted)}
.label-with-help{
  display:flex;
  align-items:center;
  gap:6px;
  min-width:0;
}
.help-icon{
  position:relative;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  flex:0 0 auto;
  width:17px;
  height:17px;
  border:1px solid var(--border);
  border-radius:50%;
  color:var(--muted);
  font-size:.72rem;
  font-weight:700;
  line-height:1;
  cursor:help;
  user-select:none;
}
.help-icon:hover,
.help-icon:focus{
  color:var(--text);
  border-color:var(--accent);
  outline:none;
}
.help-icon::after{
  content:attr(data-tooltip);
  position:absolute;
  z-index:200;
  left:50%;
  bottom:calc(100% + 9px);
  transform:translateX(-50%);
  width:max-content;
  max-width:280px;
  padding:8px 10px;
  border:1px solid var(--border);
  border-radius:8px;
  background:var(--panel);
  color:var(--text);
  box-shadow:var(--shadow);
  font-size:.78rem;
  font-weight:400;
  line-height:1.35;
  white-space:normal;
  opacity:0;
  visibility:hidden;
  pointer-events:none;
}
.help-icon::before{
  content:"";
  position:absolute;
  z-index:201;
  left:50%;
  bottom:calc(100% + 4px);
  transform:translateX(-50%);
  border:5px solid transparent;
  border-top-color:var(--border);
  opacity:0;
  visibility:hidden;
  pointer-events:none;
}
.help-icon:hover::after,
.help-icon:hover::before,
.help-icon:focus::after,
.help-icon:focus::before{
  opacity:1;
  visibility:visible;
}
input,summary,button{font:inherit}
input[type=number]{
  width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:9px;
  background:var(--panel);color:var(--text)
}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin-top:22px}
.stat{padding:16px;background:var(--panel);border:1px solid var(--border);border-radius:14px}
.stat-label{font-size:.8rem;color:var(--muted)}
.stat-value{margin-top:4px;font-size:1.5rem;font-weight:700}
.stat-detail{margin-top:3px;font-size:.82rem;color:var(--muted)}

/* multi-select */
.multi{position:relative}
details{position:relative}
summary{
  position:relative;
  min-height:42px;
  padding:10px 40px 10px 12px;
  border:1px solid var(--border);
  border-radius:9px;
  background:var(--panel);
  color:var(--text);
  cursor:pointer;
  list-style:none;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis
}
summary::-webkit-details-marker{display:none}
summary::after{
  content:"▾";
  position:absolute;
  right:13px;
  top:50%;
  transform:translateY(-50%);
  color:var(--muted);
  font-size:1rem;
  line-height:1;
}
details[open] summary{border-color:var(--accent)}
details[open] summary::after{
  content:"▴";
  color:var(--accent);
}
.menu{
  position:absolute;z-index:20;top:calc(100% + 7px);left:0;width:340px;max-width:min(340px,90vw);
  padding:12px;background:var(--panel);border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow)
}
.menu-header{
  display:flex;align-items:flex-start;justify-content:space-between;gap:12px;
  padding-bottom:10px;margin-bottom:10px;border-bottom:1px solid var(--border)
}
.menu-header strong{display:block;color:var(--text);font-size:.95rem}
.menu-subtitle{margin-top:2px;color:var(--muted);font-size:.76rem;line-height:1.35}
.icon-button{
  flex:0 0 auto;width:34px;height:34px;padding:0;border:1px solid var(--border);border-radius:8px;
  background:var(--panel);color:var(--text);font-size:1.35rem;line-height:1;cursor:pointer
}
.icon-button:hover{border-color:var(--accent);background:var(--accentSoft)}
.menu-actions{display:flex;gap:8px;padding-bottom:10px;margin-bottom:10px;border-bottom:1px solid var(--border)}
.menu-actions button{
  flex:1;padding:8px 10px;border:1px solid var(--border);border-radius:8px;background:var(--panel);color:var(--text);cursor:pointer
}
.menu-actions button:hover{border-color:var(--accent)}
.cog-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:5px;max-height:360px;overflow:auto}
.menu-footer{
  position:sticky;bottom:-12px;margin:10px -12px -12px;padding:10px 12px 12px;
  border-top:1px solid var(--border);background:var(--panel)
}
.done-button{
  width:100%;padding:10px 14px;border:1px solid var(--accent);border-radius:9px;
  background:var(--accent);color:white;font-weight:700;cursor:pointer
}
.done-button:hover{filter:brightness(1.06)}
.cog-item{display:flex;flex-direction:row;align-items:center;gap:6px;padding:7px;border-radius:7px;color:var(--text);cursor:pointer}
.cog-item:hover{background:var(--accentSoft)}
.cog-item input{margin:0;width:auto}
.helper{font-size:.77rem;color:var(--muted);margin-top:4px}

.legend{display:flex;flex-wrap:wrap;gap:16px;margin-bottom:8px;font-size:.82rem;color:var(--muted)}
.legend span{display:inline-flex;align-items:center;gap:7px}
.swatch{width:13px;height:13px;border-radius:4px;display:inline-block}
.gear{background:var(--accentSoft);border:1px solid var(--accent)}
.dropout{background:var(--goodSoft);border:1px solid var(--good)}
.gold{background:var(--accent);border-radius:50%}
.half-link-swatch{
  background:var(--halfLinkSoft);
  border:2px solid var(--halfLink);
  border-radius:50%;
}
.chart-heading{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  flex-wrap:wrap;
  margin-bottom:14px;
}
.chart-heading h2{
  margin:0;
}
.chart-expand-button{
  display:none;
  align-items:center;
  justify-content:center;
  gap:7px;
  min-height:40px;
  padding:8px 11px;
  border:1px solid var(--border);
  border-radius:9px;
  background:var(--panel);
  color:var(--text);
  font-weight:700;
  cursor:pointer;
  white-space:nowrap;
}
.chart-expand-button:hover{
  border-color:var(--accent);
  background:var(--accentSoft);
}
.chart-expand-button svg{
  width:17px;
  height:17px;
  fill:none;
  stroke:currentColor;
  stroke-linecap:round;
  stroke-linejoin:round;
  stroke-width:2;
}
.chart-toolbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
  margin:6px 0 10px;
}
.zoom-hint{
  color:var(--muted);
  font-size:.78rem;
}
.mobile-chart-hint{
  display:none;
}
.zoom-controls{
  display:inline-flex;
  gap:6px;
}
.zoom-controls button{
  min-width:36px;
  padding:7px 10px;
  border:1px solid var(--border);
  border-radius:8px;
  background:var(--panel);
  color:var(--text);
  cursor:pointer;
}
.zoom-controls button:hover{
  border-color:var(--accent);
  background:var(--accentSoft);
}
#chart-container{position:relative}
#chart{
  display:block;
  width:100%;
  height:auto;
  cursor:grab;
  touch-action:none;
  user-select:none;
}
#chart[data-chart-layout="mobile"],
#chart[data-chart-layout="expanded-portrait"]{
  max-width:680px;
  margin-inline:auto;
}
#chart:active{cursor:grabbing}
.tooltip{
  position:absolute;display:none;pointer-events:none;padding:10px 12px;background:var(--panel);
  color:var(--text);border:1px solid var(--border);border-radius:10px;box-shadow:var(--shadow);
  font-size:.82rem;line-height:1.45
}
.axis text{
  fill:var(--muted);
  font-size:var(--chart-tick-size,10px);
}
.axis path,.axis line{stroke:var(--border)}
.grid line{stroke:var(--border);opacity:.45}.grid path{display:none}
.chart-axis-title{
  font-size:var(--chart-axis-title-size,16px);
  font-weight:600;
}
.chart-point-group{
  cursor:pointer;
}
.chart-point,
.chart-selection-ring{
  vector-effect:non-scaling-stroke;
}
.chart-hit-target{
  fill:transparent;
  pointer-events:all;
}
.chart-selection-ring{
  display:none;
  fill:none;
  stroke:var(--text);
  stroke-width:2.5px;
  pointer-events:none;
}
.chart-point-group.is-selected .chart-selection-ring{
  display:block;
}
.chart-point-group.is-selected .chart-point{
  opacity:1;
}
.combo-label{
  font-size:var(--chart-label-size,10px);
  font-weight:700;
  fill:var(--text);
  paint-order:stroke;
  stroke:var(--panel);
  stroke-width:3px;
  stroke-linejoin:round;
  pointer-events:none;
}
.chart-selection{
  margin-top:14px;
  padding:14px;
  border:1px solid color-mix(in srgb,var(--accent) 45%,var(--border));
  border-radius:12px;
  background:linear-gradient(135deg,var(--accentSoft),var(--panel));
}
.chart-selection-heading{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding-bottom:12px;
  border-bottom:1px solid color-mix(in srgb,var(--accent) 30%,var(--border));
}
.chart-selection-heading > div{
  display:flex;
  flex-direction:column;
  gap:2px;
}
.chart-selection-eyebrow{
  color:var(--accent);
  font-size:.7rem;
  font-weight:800;
  letter-spacing:.08em;
  text-transform:uppercase;
}
.chart-selection-heading strong{
  font-size:1.05rem;
}
.chart-selection-clear{
  min-width:56px;
  min-height:40px;
  padding:7px 10px;
  border:1px solid var(--border);
  border-radius:8px;
  background:var(--panel);
  color:var(--text);
  font-weight:700;
  cursor:pointer;
}
.chart-selection-clear:hover{
  border-color:var(--accent);
}
.chart-selection-grid{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:12px 18px;
  margin:14px 0 0;
}
.chart-selection-grid div{
  min-width:0;
}
.chart-selection-grid dt{
  color:var(--muted);
  font-size:.72rem;
}
.chart-selection-grid dd{
  margin:3px 0 0;
  color:var(--text);
  font-size:.9rem;
  font-weight:700;
}
#chartSelectionStatus[data-status="goldilocks"]{
  color:var(--accent);
}
#chartSelectionStatus[data-status="fits-dropout"]{
  color:var(--good);
}
body.chart-expanded{
  overflow:hidden;
}
.chart-panel.is-expanded{
  position:fixed;
  inset:0;
  z-index:1000;
  width:100%;
  height:100vh;
  height:100dvh;
  margin:0;
  padding:
    max(16px,env(safe-area-inset-top,0px))
    max(16px,env(safe-area-inset-right,0px))
    max(20px,env(safe-area-inset-bottom,0px))
    max(16px,env(safe-area-inset-left,0px));
  overflow-y:auto;
  overscroll-behavior:contain;
  border:0;
  border-radius:0;
  background:var(--panel);
}
.chart-panel.is-expanded .chart-heading,
.chart-panel.is-expanded .legend,
.chart-panel.is-expanded .chart-toolbar,
.chart-panel.is-expanded #chart-container,
.chart-panel.is-expanded .chart-selection{
  width:100%;
  max-width:1200px;
  margin-left:auto;
  margin-right:auto;
}
.chart-panel.is-expanded .chart-expand-button{
  display:inline-flex;
}
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse}
th,td{padding:10px;text-align:left;border-bottom:1px solid var(--border);white-space:nowrap}
th{font-size:.78rem;color:var(--muted)}
.badge{display:inline-block;padding:3px 8px;border-radius:999px;font-size:.74rem}
.badge.gold{color:var(--accent);background:var(--accentSoft)}
.badge.fit{color:var(--good);background:var(--goodSoft)}
.badge.other{color:var(--muted);border:1px solid var(--border)}
.badge.half-link-badge{
  margin-left:5px;
  color:var(--halfLink);
  background:var(--halfLinkSoft);
}
.gear-explainer{
  margin-top:18px;
  border-top:1px solid var(--border);
  padding-top:14px;
}
.gear-explainer summary{
  display:inline-flex;
  align-items:center;
  gap:7px;
  width:auto;
  min-height:auto;
  padding:0;
  border:0;
  border-radius:0;
  background:transparent;
  color:var(--accent);
  font-weight:700;
  cursor:pointer;
  overflow:visible;
}
.gear-explainer summary::after{
  position:static;
  transform:none;
  content:"▾";
  color:var(--accent);
  font-size:.9rem;
  margin-left:2px;
}
.gear-explainer[open] summary{
  border-color:transparent;
}
.gear-explainer[open] summary::after{
  content:"▴";
  color:var(--accent);
}
.gear-explainer-body{
  margin-top:10px;
  max-width:850px;
  color:var(--muted);
  font-size:.88rem;
  line-height:1.55;
}
.gear-explainer-body p{
  margin:0 0 8px;
}
.gear-explainer-body ul {
  margin: 8px 0 12px;
  padding-left: 20px;
}
.gear-explainer-body li {
  margin-bottom: 6px;
}
.gear-explainer-body p:last-child{
  margin-bottom:0;
}
.gear-formula{
  display:inline-block;
  margin:2px 0;
  padding:4px 8px;
  border:1px solid var(--border);
  border-radius:7px;
  background:var(--bg);
  color:var(--text);
  font-family:ui-monospace,SFMono-Regular,Consolas,monospace;
  font-size:.82rem;
}
.checks{display:flex;gap:16px;align-items:center;flex-wrap:wrap;margin-top:14px}
.checks label{display:flex;flex-direction:row;align-items:center;gap:7px;color:var(--text)}
.checks .half-link-control{
  color:var(--halfLink);
  font-weight:600;
}
.checks .half-link-control input{
  accent-color:var(--halfLink);
}
.half-link-label{
  fill:var(--halfLink);
}
.half-link-text{
  color:var(--halfLink);
}

@media(max-width:640px){
  :root{
    --page-gutter:max(16px,env(safe-area-inset-left,0px),env(safe-area-inset-right,0px));
  }
  main{
    max-width:none;
    padding-top:24px;
  }
  .panel{
    width:100%;
    min-width:0;
    padding:18px;
  }
  .unit-row{
    align-items:stretch;
  }
  .unit-controls{
    width:100%;
    min-width:0;
    margin-left:0;
    justify-content:center;
  }
  .unit-copy{
    width:100%;
    flex:1 1 100%;
    text-align:center;
  }
  .unit-toggle{
    margin-inline:auto;
  }
  .inputs{
    grid-template-columns:minmax(0,1fr);
  }
  .inputs > *{
    width:100%;
    min-width:0;
  }
  .menu{
    width:100%;
    max-width:100%;
  }
  .report-footer{
    align-items:stretch;
  }
  .report-footer .report-button{
    width:100%;
    justify-content:center;
  }
  .install-app{
    grid-template-columns:1fr;
    align-items:stretch;
  }
  .install-app-button{
    width:100%;
  }
  .install-app-help{
    grid-column:1;
  }
  .chart-toolbar{
    align-items:flex-start;
  }
  .zoom-controls{
    display:grid;
    grid-template-columns:44px 44px minmax(0,1fr);
    width:100%;
  }
  .zoom-controls button{
    min-height:44px;
  }
  .chart-selection-grid{
    grid-template-columns:repeat(2,minmax(0,1fr));
  }
}

@media(max-width:820px),(display-mode:standalone) and (max-width:900px){
  .chart-expand-button{
    display:inline-flex;
    min-height:44px;
  }
  .desktop-chart-hint{
    display:none;
  }
  .mobile-chart-hint{
    display:inline;
  }
}