/* Layout: control rail on the left, A4-landscape "paper" sheet on the right; the sheet is always printed white. */
:root{
  --bg:#eef1f4; --panel:#ffffff; --line:#d5dbe2; --fg:#14212e; --muted:#5b6b7b;
  --brand:#13283d; --signal:#e2702a; --signal-soft:#fbe7d9; --ok:#2f8a4f; --warn:#c0571b;
  --input:#f7f9fb;
  --f-display:"Barlow Condensed","Arial Narrow",Arial,sans-serif;
  --f-body:"IBM Plex Sans","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --f-mono:"IBM Plex Mono",Consolas,"Courier New",monospace;
  color-scheme:light;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#0f161d; --panel:#16202a; --line:#2a3846; --fg:#e4eaf0; --muted:#93a3b3;
  --brand:#cfe0f0; --signal:#f08a45; --signal-soft:#3a2416; --ok:#5cc07c; --warn:#f08a45; --input:#101921; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#0f161d; --panel:#16202a; --line:#2a3846; --fg:#e4eaf0; --muted:#93a3b3;
  --brand:#cfe0f0; --signal:#f08a45; --signal-soft:#3a2416; --ok:#5cc07c; --warn:#f08a45; --input:#101921; color-scheme:dark}
*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--bg);color:var(--fg);font:14px/1.45 var(--f-body)}
.topbar{display:flex;flex-wrap:wrap;gap:12px;align-items:center;justify-content:space-between;padding:12px 20px;background:var(--panel);border-bottom:1px solid var(--line)}
.brandmark{display:flex;align-items:baseline;gap:10px}
.brandmark b{font:700 22px/1 var(--f-display);letter-spacing:.06em;color:var(--brand)}
.brandmark span{font:600 13px/1 var(--f-display);letter-spacing:.14em;text-transform:uppercase;color:var(--signal)}
.brandmark em{font-style:normal;color:var(--muted);font-size:13px;margin-left:6px}
.toolbar{display:flex;flex-wrap:wrap;gap:8px;align-items:center}
select,input,button{font:inherit;color:var(--fg)}
.toolbar select{padding:6px 8px;border:1px solid var(--line);border-radius:6px;background:var(--input);max-width:100%}
.btn{padding:7px 12px;border:1px solid var(--line);border-radius:6px;background:var(--input);cursor:pointer;font-weight:500}
.btn:hover{border-color:var(--signal)}
.btn.primary{background:var(--signal);border-color:var(--signal);color:#fff}
.btn:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--signal);outline-offset:1px}
.layout{display:grid;grid-template-columns:minmax(300px,380px) minmax(0,1fr);gap:16px;padding:16px 20px}
@media (max-width:980px){.layout{grid-template-columns:minmax(0,1fr)}}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:4px 14px 14px;align-self:start;min-width:0}
.panel h3{font:600 15px/1 var(--f-display);letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:16px 0 8px;padding-top:12px;border-top:1px solid var(--line)}
.panel h3:first-of-type{border-top:0}
.note{font-size:12.5px;background:var(--signal-soft);border-left:3px solid var(--signal);padding:8px 10px;border-radius:4px;margin:10px 0 0}
.field{display:grid;grid-template-columns:1fr 150px;gap:8px;align-items:center;margin:5px 0}
.field label{font-size:13px;color:var(--fg)}
.field label small{display:block;color:var(--muted);font-size:11.5px}
.field input,.field select{width:100%;padding:5px 7px;border:1px solid var(--line);border-radius:5px;background:var(--input);font-family:var(--f-mono);font-size:13px}
.field.wide{grid-template-columns:1fr}
.field.wide input{font-family:var(--f-body)}
.agg{display:grid;grid-template-columns:1fr 80px;gap:6px;margin:5px 0}
.agg input{padding:5px 7px;border:1px solid var(--line);border-radius:5px;background:var(--input);font-size:13px;min-width:0}
.agg input.n{font-family:var(--f-mono)}
table.steps{width:100%;border-collapse:collapse;font-size:12.5px}
table.steps td{padding:4px 2px;border-bottom:1px solid var(--line);vertical-align:middle}
table.steps td small{display:block;color:var(--muted);font-size:11px}
table.steps .auto{font-family:var(--f-mono);color:var(--muted);text-align:right;white-space:nowrap;padding-right:6px}
table.steps input{width:64px;padding:4px 6px;border:1px solid var(--line);border-radius:5px;background:var(--input);font-family:var(--f-mono);font-size:13px;text-align:right}
table.steps input.over{border-color:var(--signal);background:var(--signal-soft)}
table.steps button{border:0;background:none;color:var(--muted);cursor:pointer;font-size:14px;padding:2px 4px}
table.steps button:hover{color:var(--signal)}
.legend{font-size:11.5px;color:var(--muted);margin-top:6px}
.legend i{display:inline-block;width:10px;height:10px;border:1px solid var(--signal);background:var(--signal-soft);vertical-align:-1px;margin-right:4px}
.main{min-width:0;display:flex;flex-direction:column;gap:16px}
.sheetwrap{overflow-x:auto;border-radius:8px;border:1px solid var(--line);background:#fff}
/* ---------- printed sheet (always paper white) ---------- */
.sheet{min-width:1060px;background:#fff;color:#111;padding:14px 16px;font:12px/1.3 var(--f-body)}
.sh-head{display:grid;grid-template-columns:230px 1fr 230px;align-items:center;border:1.5px solid #111;border-bottom:0;padding:6px 10px;gap:10px}
.sh-logo{display:flex;flex-direction:column;line-height:1}
.sh-logo b{font:700 26px/1 var(--f-display);letter-spacing:.06em;color:#13283d}
.sh-logo span{font:600 11px/1.2 var(--f-display);letter-spacing:.26em;color:#e2702a;margin-top:3px}
.sh-title{text-align:center;font:700 19px/1.15 var(--f-display);letter-spacing:.03em;text-wrap:balance}
.sh-ref{text-align:right;font-size:11px;color:#333}
.sh-params{display:grid;grid-template-columns:1.35fr 1.25fr 1.1fr;border:1.5px solid #111}
.sh-params table{border-collapse:collapse;width:100%}
.sh-params td{border:1px solid #9aa;padding:2px 6px;height:20px}
.sh-params td.v{text-align:center;font-family:var(--f-mono);width:78px}
.sh-gantt{border:1.5px solid #111;border-top:0}
.sh-gantt svg{display:block;width:100%;height:auto}
.sh-bottom{display:grid;grid-template-columns:1.9fr 1fr;border:1.5px solid #111;border-top:0}
.sh-bottom table{border-collapse:collapse;width:100%}
.sh-bottom td{border:1px solid #9aa;padding:3px 6px}
.sh-bottom td.v{text-align:center;font-family:var(--f-mono)}
.sh-bottom .hd{text-align:center;font-weight:600;background:#f2f4f6}
.res td{background:#e9edf1;font-weight:600;font-size:13px;padding:8px}
.res td.v{font-size:15px;width:90px}
.sh-notes{border:1.5px solid #111;border-top:0;padding:5px 8px;font-size:11.2px}
.sh-notes p{margin:1px 0}
.sh-foot{display:flex;justify-content:space-between;font-size:10px;color:#555;padding:4px 2px 0}
/* ---------- analysis cards ---------- */
.card{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:14px 16px;min-width:0}
.card h2{font:600 18px/1.1 var(--f-display);letter-spacing:.06em;text-transform:uppercase;margin:0 0 10px;color:var(--brand)}
.loops{display:flex;flex-direction:column;gap:8px}
.loop{display:grid;grid-template-columns:150px minmax(0,1fr) 64px;gap:10px;align-items:center;font-size:13px}
.loop .track{height:12px;background:var(--input);border:1px solid var(--line);border-radius:3px;overflow:hidden}
.loop .fillbar{height:100%;background:var(--muted);opacity:.55}
.loop.lim .fillbar{background:var(--signal);opacity:1}
.loop.lim{font-weight:600}
.loop .num{font-family:var(--f-mono);text-align:right}
.loop small{display:block;color:var(--muted);font-weight:400;font-size:11.5px}
.kpis{display:flex;flex-wrap:wrap;gap:18px;margin-bottom:12px}
.kpi b{display:block;font:600 24px/1 var(--f-mono);color:var(--brand)}
.kpi span{font-size:12px;color:var(--muted)}
.tablewrap{overflow-x:auto}
table.verify{border-collapse:collapse;width:100%;font-size:12.5px;font-variant-numeric:tabular-nums}
table.verify th,table.verify td{border-bottom:1px solid var(--line);padding:5px 6px;text-align:right;white-space:nowrap}
table.verify th:first-child,table.verify td:first-child{text-align:left}
table.verify td.vnote{white-space:normal;text-align:left;color:var(--muted);min-width:260px}
.ok{color:var(--ok);font-weight:600}.bad{color:var(--warn);font-weight:600}
.muted{color:var(--muted)}
@media (prefers-reduced-motion:no-preference){.loop .fillbar{transition:width .25s}}
@page{size:A4 landscape;margin:7mm}
@media print{
  body{background:#fff}
  .topbar,.panel,.card,.noprint{display:none!important}
  .layout{display:block;padding:0}
  .sheetwrap{border:0;overflow:visible}
  .sheet{min-width:0;padding:0;zoom:.86}
  .sheet,.sh-head,.sh-params,.sh-gantt,.sh-bottom,.sh-notes{break-inside:avoid}
}
.seg{display:inline-flex;border:1px solid var(--line);border-radius:6px;overflow:hidden}
.seg button{border:0;background:var(--input);padding:7px 12px;cursor:pointer;font-weight:500}
.seg button[aria-pressed="true"]{background:var(--brand);color:var(--panel)}
.toolbar input#project{padding:6px 8px;border:1px solid var(--line);border-radius:6px;background:var(--input);width:180px;max-width:100%}
.aggh,.aggr{display:grid;grid-template-columns:minmax(0,1fr) 62px 58px;gap:6px;margin:4px 0;align-items:center}
.aggh.adv,.aggr.adv{grid-template-columns:minmax(0,1fr) 58px 52px 42px}
.aggh{font-size:11.5px;color:var(--muted)}
.aggr select,.aggr input{width:100%;min-width:0;padding:5px 6px;border:1px solid var(--line);border-radius:5px;background:var(--input);font-size:12.5px}
.aggr input{font-family:var(--f-mono)}
.calc{font-size:12px;color:var(--muted);margin:4px 0 0;line-height:1.5}
.calc b{color:var(--fg);font-family:var(--f-mono)}
.btnrow{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.btn.sm{padding:5px 9px;font-size:12.5px}
table.steps th{font-size:11px;font-weight:500;color:var(--muted);text-align:right;padding:2px}
table.steps th:first-child{text-align:left}
table.steps td.used{color:var(--fg);font-weight:600}
table.steps input{width:56px}
details.rules{margin-top:12px;font-size:13px}
details.rules summary{cursor:pointer;font-weight:600;color:var(--brand)}
details.rules ol{margin:8px 0 0;padding-left:20px;color:var(--muted)}
.vnotes{font-size:12px;color:var(--muted);margin-top:8px}
.vnotes p{margin:3px 0}

/* Link back to the BetonParts site */
.brandmark .home{font:600 18px/1 var(--f-mono);color:var(--muted);text-decoration:none;margin-right:2px}
.brandmark .home:hover{color:var(--signal)}