:root{
  color-scheme:dark;
  --bg:#0B0E14;
  --bg-panel:#141A23;
  --bg-elevated:#1B2330;
  --text:#E8ECF3;

  --navy:#5B9DFF;
  --amber:#F0B849;
  --violet:#B79CFA;
  --editable-border:#3B82F6;
  --editable-bg:#171F2C;
  --editable-text:#EAF0FA;
  --linked:#34D399;
  --computed:#E8ECF3;
  --highlight-bg:rgba(52,211,153,.14);
  --toggle-bg:rgba(240,184,73,.14);
  --neg:#F87171;
  --neg-bg:rgba(248,113,113,.14);

  --border:#232B39;
  --border-soft:rgba(255,255,255,.055);
  --muted:#8A94A6;
  --shadow:0 1px 2px rgba(0,0,0,.5), 0 16px 32px rgba(0,0,0,.32);
}
*{box-sizing:border-box;}
html{scrollbar-color:var(--border) transparent;scrollbar-width:thin;}
body{
  margin:0;
  font-family:'Inter',-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  background:
    radial-gradient(1100px circle at 8% -10%, rgba(91,157,255,.08), transparent 42%),
    radial-gradient(900px circle at 100% 0%, rgba(52,211,153,.05), transparent 40%),
    var(--bg);
  color:var(--text);
  padding-bottom:48px;
  letter-spacing:-.005em;
}
::selection{background:rgba(91,157,255,.35);color:#fff;}

/* ---------- header ---------- */
header.site-header{
  background:rgba(20,26,35,.7);
  border-bottom:1px solid var(--border);
  color:var(--text);
  padding:16px 28px;
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
}
.header-inner h1{margin:0;font-size:1.2rem;font-weight:700;letter-spacing:-.01em;color:#fff;}
#reset-btn{
  background:var(--bg-elevated);
  border:1px solid var(--border);
  color:var(--text);
  font-weight:600;
  font-size:0.78rem;
  padding:8px 16px;
  border-radius:8px;
  cursor:pointer;
  white-space:nowrap;
  transition:border-color .15s ease,color .15s ease,background .15s ease;
}
#reset-btn:hover{border-color:var(--navy);color:var(--navy);background:rgba(91,157,255,.08);}

/* ---------- sticky KPI bar ---------- */
.kpi-bar{
  position:sticky;
  top:0;
  z-index:30;
  background:rgba(15,19,27,.86);
  backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--border);
}
.kpi-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:28px;
  padding:12px 28px;
}
.kpi-tile{
  display:flex;
  flex-direction:column;
  gap:3px;
}
.kpi-tile .kpi-label{
  display:flex;align-items:center;gap:6px;
  font-size:0.64rem;color:var(--muted);text-transform:uppercase;letter-spacing:.06em;font-weight:600;
}
.kpi-tile .kpi-label::before{content:"";width:6px;height:6px;border-radius:50%;flex-shrink:0;}
.kpi-tile:nth-child(1) .kpi-label::before{background:var(--navy);}
.kpi-tile:nth-child(2) .kpi-label::before{background:var(--linked);}
.kpi-tile:nth-child(3) .kpi-label::before{background:var(--amber);}
.kpi-tile:nth-child(4) .kpi-label::before{background:var(--violet);}
.kpi-tile .kpi-value{font-size:1.2rem;font-weight:700;color:var(--text);line-height:1.2;}

.kpi-payback{
  margin-left:auto;
  font-size:0.78rem;
  font-weight:600;
  padding:6px 14px;
  border-radius:20px;
  white-space:nowrap;
}
.kpi-payback.good{background:var(--highlight-bg);color:var(--linked);}
.kpi-payback.bad{background:var(--neg-bg);color:var(--neg);}

/* ---------- layout ---------- */
.layout{
  display:grid;
  grid-template-columns:300px 1fr;
  align-items:start;
  gap:20px;
  padding:22px 28px 0;
}
@media (max-width:900px){
  .layout{grid-template-columns:1fr;}
}

.sidebar{
  background:var(--bg-panel);
  border:1px solid var(--border);
  border-radius:14px;
  box-shadow:var(--shadow);
  padding:18px 18px 8px;
}
.sidebar-head h2{margin:0;font-size:0.95rem;font-weight:700;color:#fff;}

.content{min-width:0;}

.card{
  background:var(--bg-panel);
  border:1px solid var(--border);
  border-radius:14px;
  box-shadow:var(--shadow);
  padding:20px 22px;
  margin-bottom:18px;
}

/* ---------- section headers: quiet label + hairline, not a colored chip ---------- */
.section-title{
  background:none;
  color:var(--muted);
  font-size:0.68rem;
  font-weight:700;
  letter-spacing:0.08em;
  text-transform:uppercase;
  padding:0 0 8px;
  margin:22px 0 12px;
  border-bottom:1px solid var(--border);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:8px;
}
#tab-global > .section-title:first-child,
#tab-calc > .section-title:first-child{margin-top:0;}

.section-block{margin-top:22px;display:flow-root;}
#tab-global > .section-block:first-child,
#tab-calc > .section-block:first-child{margin-top:0;}
.section-block > summary.section-title{
  margin-top:0;
  cursor:pointer;
  user-select:none;
  border-radius:6px 6px 0 0;
  transition:color .12s ease;
}
.section-block > summary.section-title::-webkit-details-marker{display:none;}
.section-block > summary.section-title{list-style:none;}
.section-block > summary.section-title:hover{color:var(--navy);}
.section-block > summary.section-title::after{
  content:"";
  width:13px;height:13px;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235B9DFF' stroke-width='2.6' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='9 18 15 12 9 6'/%3E%3C/svg%3E");
  background-size:contain;
  background-repeat:no-repeat;
  transition:transform .18s ease;
  flex-shrink:0;
}
.section-block[open] > summary.section-title::after{transform:rotate(90deg);}
.section-block > .fields-grid{margin:0 0 6px;padding:2px 0 0;}

.legend-tag{
  font-weight:500;
  text-transform:none;
  letter-spacing:0;
  font-size:0.68rem;
  color:var(--navy);
  background:rgba(91,157,255,.12);
  padding:2px 9px;
  border-radius:10px;
}

/* ---------- fields ---------- */
.fields-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
  gap:2px 22px;
}
.field-row{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  padding:8px 4px;
  border-radius:6px;
}
.field-row:hover{background:rgba(255,255,255,.03);}
.field-label{font-size:0.81rem;color:#C7CEDA;flex:1;}
.field-note{font-size:0.68rem;color:var(--muted);display:block;width:100%;margin-top:2px;}

.list-card{
  border:1px solid var(--border);
  border-radius:10px;
  background:var(--bg-elevated);
  padding:10px 14px 4px;
  margin-bottom:12px;
}
.list-card-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-bottom:4px;
}
.list-card-title{font-size:0.78rem;font-weight:700;color:var(--text);}

.inp{
  width:138px;
  padding:7px 10px;
  border:1px solid var(--border);
  border-left:3px solid var(--editable-border);
  background:var(--editable-bg);
  border-radius:6px;
  font-size:0.83rem;
  font-family:inherit;
  color:var(--editable-text);
  font-weight:500;
  text-align:right;
  transition:border-color .12s ease,box-shadow .12s ease;
}
.inp[type="text"], .inp[type="date"]{text-align:left;width:210px;}
select.inp{text-align:left;}
.inp:hover{border-color:#3A465A;border-left-color:var(--editable-border);}
.inp:focus{outline:none;border-color:var(--navy);box-shadow:0 0 0 3px rgba(91,157,255,.16);}
.inp:disabled{background:#12161D;color:#565F6E;border-color:var(--border);border-left-color:var(--border);}

.pct-wrap{display:flex;align-items:center;gap:6px;}
.pct-suffix{font-size:0.78rem;color:var(--muted);}

.highlight-row{
  background:var(--toggle-bg);
  border-radius:8px;
  padding:10px 12px !important;
}

.bikes-row{align-items:center;}
.preset-btns{display:flex;gap:6px;}
.preset-btn{
  background:var(--bg-elevated);border:1px solid var(--border);color:var(--muted);
  font-weight:600;font-size:0.7rem;padding:5px 11px;border-radius:6px;cursor:pointer;
  transition:all .12s ease;
}
.preset-btn:hover{border-color:var(--navy);color:var(--navy);background:rgba(91,157,255,.08);}

.remove-btn{
  background:var(--bg-elevated);border:1px solid var(--border);color:var(--muted);
  font-weight:700;font-size:0.9rem;line-height:1;width:26px;height:26px;flex-shrink:0;
  border-radius:6px;cursor:pointer;transition:all .12s ease;
}
.remove-btn:hover{border-color:var(--neg);color:var(--neg);background:var(--neg-bg);}

.field-value{font-size:0.83rem;font-weight:600;text-align:right;}
.field-value.linked{color:var(--linked);}
.field-value.computed{color:var(--computed);}

/* ---------- charts ---------- */
.chart-sync-wrap{cursor:crosshair;}
.chart-hover-readout{
  font-size:0.76rem;
  font-weight:600;
  color:var(--navy);
  background:rgba(91,157,255,.08);
  border:1px solid var(--border);
  border-radius:8px;
  padding:7px 12px;
  margin-bottom:12px;
  font-variant-numeric:tabular-nums;
}
.chart-hover-line{stroke:var(--text);stroke-width:1;stroke-dasharray:2,2;opacity:.55;pointer-events:none;}
.chart-card{
  border:1px solid var(--border);
  border-radius:10px;
  background:var(--bg-elevated);
  padding:14px 16px 6px;
  margin:0 0 14px;
}
.chart-svg{width:100%;height:auto;display:block;}
.chart-grid{stroke:var(--border-soft);stroke-width:1;}
.chart-zero{stroke:var(--border);stroke-width:1.2;stroke-dasharray:3,3;}
.chart-axis-label{font-size:11px;fill:var(--muted);font-family:inherit;}
.chart-breakeven-line{stroke:var(--linked);stroke-width:1.2;stroke-dasharray:4,3;opacity:.6;}
.chart-breakeven-label{font-size:11px;font-weight:600;fill:var(--linked);font-family:inherit;}

@media (max-width:600px){
  .inp{width:110px;}
  .inp[type="text"], .inp[type="date"]{width:100%;}
  .kpi-row{padding:10px 18px;gap:18px;}
  .layout{padding:16px 16px 0;}
}