/* Layout idea (from the team's sketch): three columns. Left = data choices,
   centre = visualisation options over the main view, right = graph panel that opens and closes. */
:root{
  --paper:#f3f5f4; --sheet:#fcfcfb; --ink:#0f2230; --ink-2:#4a5a64; --rule:#d3dadb;
  --probe:#a87400; --land:#d9d6cc;
  --neg:#1c5cab; --mid:#f0efec; --pos:#c23b30;
  --panel-w:360px;
  --display:"Bricolage Grotesque","Arial Narrow",Arial,sans-serif;
  --body:"IBM Plex Sans",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,Menlo,Consolas,monospace;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    color-scheme:dark;
    --paper:#111a20; --sheet:#1a1a19; --ink:#eef1f0; --ink-2:#b4bfc3; --rule:#34424a;
    --probe:#e3ad2b; --land:#3d3f3c; --neg:#5598e7; --mid:#383835; --pos:#e8695f;
  }
}
:root[data-theme="dark"]{
  color-scheme:dark;
  --paper:#111a20; --sheet:#1a1a19; --ink:#eef1f0; --ink-2:#b4bfc3; --rule:#34424a;
  --probe:#e3ad2b; --land:#3d3f3c; --neg:#5598e7; --mid:#383835; --pos:#e8695f;
}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--body);font-size:15px;line-height:1.5}
h2{font-family:var(--mono);font-weight:500;font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-2);margin:0 0 8px}
p{margin:0}
button{font:inherit;color:inherit}
button:focus-visible,canvas:focus-visible{outline:2px solid var(--probe);outline-offset:2px}
[hidden]{display:none !important}

.app{display:flex;height:100%;min-height:600px}
.work{flex:1;min-width:0;min-height:0;display:flex;flex-direction:column}
.row{position:relative;flex:1;min-height:0;display:flex}
.row.panel-closed .panel{display:none}
.row.analysis .main{flex-grow:0;opacity:0;pointer-events:none}
.row.analysis .panel{flex:1 1 var(--panel-w);border-left:0;padding:22px 28px}
.row.analysis #panel-toggle{display:none}

/* panel handle: sits on the border between the main view and the graph panel */
#panel-toggle{position:absolute;top:12px;right:var(--panel-w);transform:translateX(50%);z-index:3;width:28px;height:28px;border-radius:50%;
  border:1px solid var(--ink);background:var(--sheet);cursor:pointer;line-height:1;font-size:1.1rem;display:grid;place-items:center;padding:0 0 2px}
.row.panel-closed #panel-toggle{right:10px;transform:none}

.side{flex:0 0 250px;background:var(--sheet);border-right:1px solid var(--rule);display:flex;flex-direction:column;min-height:0}
.logo{display:flex;align-items:center;gap:10px;padding:14px 16px;border-bottom:1px solid var(--rule);height:58px}
.logo-box{font-family:var(--mono);font-size:.7rem;border:1.5px dashed var(--ink-2);color:var(--ink-2);padding:6px 8px;border-radius:4px}
.logo-name{font-family:var(--display);font-weight:700;font-size:1.1rem}
.side-body{padding:16px;display:flex;flex-direction:column;gap:20px;overflow-y:auto;min-height:0}
.flag{font-family:var(--mono);font-size:.74rem;border:1.5px dashed var(--probe);padding:6px 8px;border-radius:4px}
.fact{font-size:.92rem}.dim{color:var(--ink-2);font-size:.84rem}
#var-hint{margin-bottom:8px}
.varlist{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:2px}
.varlist button{width:100%;text-align:left;background:transparent;border:0;border-left:3px solid transparent;padding:6px 8px;border-radius:0 4px 4px 0;cursor:pointer;display:flex;align-items:baseline;gap:8px;font-size:.9rem}
.varlist button:hover{background:var(--paper)}
.varlist button[aria-pressed="true"]{border-left-color:var(--ink);background:var(--paper);font-weight:600}
.varlist .name{flex:1}
.varlist .unit{font-family:var(--mono);font-size:.7rem;color:var(--ink-2);font-weight:400;white-space:nowrap}
.varlist .box{display:none;flex:none;width:14px;height:14px;border:1.5px solid var(--ink);border-radius:3px;align-self:center;position:relative}
.varlist.multi .box{display:inline-block}
.varlist.multi button[aria-pressed="true"] .box{background:var(--ink)}
.varlist.multi button[aria-pressed="true"] .box::after{content:"";position:absolute;left:3.5px;top:.5px;width:4px;height:8px;border:solid var(--sheet);border-width:0 2px 2px 0;transform:rotate(45deg)}
.definitions{display:flex;flex-direction:column;gap:10px;font-size:.9rem}
.definitions b{font-weight:600}
.definitions .src{display:block;color:var(--ink-2);font-size:.8rem}

.main{flex:1 1 0;display:flex;flex-direction:column;min-width:0;min-height:0;overflow:hidden;transition:flex-grow .45s ease,opacity .25s ease}
.options{flex:none;display:flex;align-items:center;gap:16px;padding:0 16px;height:58px;border-bottom:1px solid var(--rule);background:var(--sheet)}
.options-label{font-family:var(--mono);font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-2)}
.seg{display:inline-flex;border:1px solid var(--ink);border-radius:5px;overflow:hidden}
.seg button{background:transparent;border:0;padding:6px 12px;cursor:pointer;font-size:.88rem}
.seg button + button{border-left:1px solid var(--ink)}
.seg button[aria-pressed="true"]{background:var(--ink);color:var(--sheet)}
.seg.small button{padding:2px 8px;font-size:.76rem}
.ghost{background:transparent;border:1px solid var(--ink);border-radius:5px;padding:5px 10px;cursor:pointer;font-size:.84rem}
.ghost.small{padding:2px 8px;font-size:.76rem;white-space:nowrap}
.stage{position:relative;flex:1;min-height:0}
#view{position:absolute;inset:0;width:100%;height:100%;display:block;cursor:pointer;touch-action:none}
#view.flat{cursor:crosshair}
.loading{position:absolute;inset:0;display:grid;place-items:center;font-family:var(--mono);color:var(--ink-2)}
.stackbar{display:flex;align-items:center;justify-content:center;gap:12px;padding:8px 16px;border-top:1px solid var(--rule);background:var(--sheet);min-height:50px}
.stackbar #back{margin-right:8px}
.stackbar #scroll-pos{font-family:var(--mono);font-size:.84rem;min-width:110px;text-align:center}
.round{width:32px;height:32px;border-radius:50%;border:1px solid var(--ink);background:var(--sheet);cursor:pointer;font-size:.75rem;padding:0}
.round:disabled{border-color:var(--rule);color:var(--rule);cursor:default}
.legend{display:flex;flex-wrap:wrap;gap:8px 18px;align-items:center;padding:8px 16px;border-top:1px solid var(--rule);background:var(--sheet);font-size:.8rem;color:var(--ink-2);min-height:42px}
.ramp{display:inline-block;width:110px;height:10px;border-radius:2px;background:linear-gradient(90deg,var(--neg),var(--mid),var(--pos));vertical-align:middle;margin:0 6px}
.sw{display:inline-block;width:14px;height:14px;vertical-align:-2px;margin-right:6px;border:1px solid var(--rule)}
.sw.land{background:var(--land)}
.sw.hatch{background:repeating-linear-gradient(135deg,transparent 0 3px,var(--ink) 3px 4px)}
.sw.probe{background:var(--probe);border-color:var(--probe);border-radius:50%}

.panel{flex:0 0 var(--panel-w);background:var(--sheet);border-left:1px solid var(--rule);padding:16px 16px 16px 22px;overflow-y:auto;min-height:0;min-width:0;transition:flex-grow .45s ease}
#viz-panel{display:flex;flex-direction:column;gap:12px}
#viz-panel > *{flex:none}
.panel-head{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;min-height:26px}
.panel-head h2{font-family:var(--display);font-weight:700;font-size:1.15rem;letter-spacing:0;text-transform:none;color:var(--ink);margin:0}
#single{display:flex;flex-direction:column;gap:12px}
#chart{width:100%;height:210px;display:block}
.verdict{font-size:.95rem;border-left:3px solid var(--probe);padding:2px 0 2px 10px}
#multi{display:flex;flex-direction:column;gap:14px}
.mini h3{font-family:var(--body);font-size:.9rem;font-weight:600;margin:0}
.mini canvas{width:100%;height:96px;display:block}
.mini p{font-family:var(--mono);font-size:.78rem;color:var(--ink-2)}
.allvars{border-collapse:collapse;width:100%;font-size:.84rem}
.allvars th,.allvars td{text-align:left;padding:5px 6px;border-bottom:1px solid var(--rule)}
.allvars th{font-family:var(--mono);font-weight:500;font-size:.66rem;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-2)}
.allvars td.num{font-family:var(--mono);font-size:.78rem;font-variant-numeric:tabular-nums}
.allvars tbody tr{cursor:pointer}.allvars tbody tr:hover{background:var(--paper)}
.allvars tr.on td:first-child{font-weight:600}
#tip{position:fixed;pointer-events:none;background:var(--ink);color:var(--sheet);font-family:var(--mono);font-size:.74rem;padding:5px 8px;border-radius:4px;white-space:nowrap;opacity:0;transform:translate(14px,14px);z-index:5}

@media (max-width:900px){
  html,body{height:auto}
  .app,.row{flex-direction:column;height:auto}
  .side,.panel{flex:none}
  .row.analysis .main{display:none}
  .side{border-right:0;border-bottom:1px solid var(--rule)}
  .stage{height:110vw;min-height:420px;flex:none}
  .panel,.row.panel-closed .panel{display:block;border-left:0;border-top:1px solid var(--rule)}
  #panel-toggle{display:none}
}
.side-body > *{flex:none}
.panel-head h2{line-height:1.2}

/* analysis screen */
#analysis{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:28px 36px;align-items:start}
#analysis .a-head{grid-column:1/-1;display:flex;flex-wrap:wrap;align-items:baseline;gap:8px 16px}
#analysis .a-head h2{font-family:var(--display);font-weight:700;font-size:1.5rem;letter-spacing:0;text-transform:none;color:var(--ink);margin:0}
#analysis section{display:flex;flex-direction:column;gap:14px;min-width:0}
#analysis .mini canvas{height:130px}
#analysis .note{font-size:.84rem;color:var(--ink-2);max-width:60ch}
.tablewrap{overflow-x:auto}
.corr{border-collapse:collapse;font-size:.76rem;font-family:var(--mono);font-variant-numeric:tabular-nums}
.corr th{font-weight:500;color:var(--ink-2);padding:4px 6px;text-align:center}
.corr th.rowh{text-align:left;font-family:var(--body);font-size:.82rem;color:var(--ink);white-space:nowrap;padding-right:10px}
.corr td{width:36px;min-width:36px;height:26px;text-align:center;color:var(--ink);border:2px solid var(--sheet)}
.corr td.self{color:var(--ink-2)}
.a-row{display:flex;flex-wrap:wrap;align-items:center;gap:10px}
@media (max-width:1100px){#analysis{grid-template-columns:minmax(0,1fr)}}
#analysis .allvars td:not(:first-child){white-space:nowrap}
.corr{font-size:.7rem}
.corr th.rowh{font-size:.78rem}