:root{
  --asphalt:#1C1F26;
  --panel:#242933;
  --panel-2:#2C323E;
  --line:#3A4150;
  --chalk:#EDEAE2;
  --chalk-dim:#9BA2B0;
  --amber:#E8A33D;
  --green:#7CB39A;
  --rust:#C2634B;
  --radius:14px;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  background:var(--asphalt);
  color:var(--chalk);
  font-family:'Inter',sans-serif;
  -webkit-font-smoothing:antialiased;
  line-height:1.5;
}
a{color:inherit;}

/* ===== Nav ===== */
.sitenav{
  border-bottom:1px solid var(--line);
  position:sticky;
  top:0;
  background:rgba(28,31,38,0.92);
  backdrop-filter:blur(6px);
  z-index:10;
}
.nav-inner{
  max-width:880px;
  margin:0 auto;
  padding:16px 20px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:12px;
}
.nav-logo{
  font-family:'Archivo Expanded',sans-serif;
  font-weight:800;
  font-size:14px;
  letter-spacing:0.04em;
  text-decoration:none;
  color:var(--chalk);
  display:flex;
  align-items:center;
  gap:8px;
}
.nav-logo .dot{width:8px;height:8px;border-radius:50%;background:var(--amber);display:inline-block;}
.nav-links{
  display:flex;
  gap:22px;
  flex-wrap:wrap;
}
.nav-links a{
  font-family:'JetBrains Mono',monospace;
  font-size:12px;
  letter-spacing:0.04em;
  text-decoration:none;
  color:var(--chalk-dim);
  transition:color .15s;
}
.nav-links a:hover, .nav-links a.current{color:var(--amber);}

.wrap{
  max-width:880px;
  margin:0 auto;
  padding:48px 20px 90px;
}
.wrap.narrow{max-width:720px;}

.eyebrow{
  font-family:'JetBrains Mono',monospace;
  font-size:12px;
  letter-spacing:0.18em;
  text-transform:uppercase;
  color:var(--amber);
  margin:0 0 14px;
  display:flex;
  align-items:center;
  gap:10px;
}
.eyebrow::before{
  content:'';
  width:22px;
  height:1px;
  background:var(--amber);
  display:inline-block;
}
h1{
  font-family:'Archivo Expanded',sans-serif;
  font-weight:800;
  font-size:clamp(26px,5vw,42px);
  line-height:1.1;
  margin:0 0 14px;
  letter-spacing:-0.01em;
}
h2.pagehead{
  font-family:'Archivo Expanded',sans-serif;
  font-weight:700;
  font-size:22px;
  margin:0 0 14px;
}
.sub{
  color:var(--chalk-dim);
  font-size:16px;
  max-width:56ch;
  margin:0 0 40px;
}

/* breadcrumb */
.crumb{
  font-family:'JetBrains Mono',monospace;
  font-size:11px;
  color:var(--chalk-dim);
  margin-bottom:18px;
}
.crumb a{text-decoration:none; color:var(--chalk-dim);}
.crumb a:hover{color:var(--amber);}

/* ===== Dashboard / gauge ===== */
.dash{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:32px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:32px;
  align-items:center;
}
@media (max-width:640px){ .dash{grid-template-columns:1fr; padding:24px;} }

.gauge-col{display:flex; flex-direction:column; align-items:center;}
.gauge-label{
  font-family:'JetBrains Mono',monospace;
  font-size:11px;
  letter-spacing:0.14em;
  text-transform:uppercase;
  color:var(--chalk-dim);
  margin-top:10px;
}
.gauge-readout{
  font-family:'JetBrains Mono',monospace;
  font-weight:700;
  font-size:15px;
  color:var(--chalk);
  margin-top:2px;
}
.needle{
  transform-origin:100px 100px;
  transition:transform 0.5s cubic-bezier(.4,1.4,.4,1);
}

.input-col label{
  display:block;
  font-family:'JetBrains Mono',monospace;
  font-size:11px;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:var(--chalk-dim);
  margin-bottom:8px;
}
.mpg-input-row{
  display:flex;
  align-items:baseline;
  gap:10px;
  border-bottom:2px solid var(--line);
  padding-bottom:10px;
  margin-bottom:8px;
}
.mpg-input-row:focus-within{border-bottom-color:var(--amber);}
input[type=number]{
  background:none;
  border:none;
  outline:none;
  color:var(--chalk);
  font-family:'JetBrains Mono',monospace;
  font-weight:700;
  font-size:40px;
  width:100%;
  -moz-appearance:textfield;
}
input[type=number]::-webkit-outer-spin-button,
input[type=number]::-webkit-inner-spin-button{-webkit-appearance:none; margin:0;}
.unit-tag{
  font-family:'JetBrains Mono',monospace;
  font-size:15px;
  color:var(--chalk-dim);
  white-space:nowrap;
}
.unit-toggle{
  display:flex;
  gap:6px;
  margin-top:14px;
  flex-wrap:wrap;
}
.unit-toggle button{
  flex:1;
  min-width:80px;
  background:var(--panel-2);
  border:1px solid var(--line);
  color:var(--chalk-dim);
  font-family:'JetBrains Mono',monospace;
  font-size:11px;
  letter-spacing:0.06em;
  padding:8px 6px;
  border-radius:8px;
  cursor:pointer;
  transition:all .15s;
}
.unit-toggle button.active{
  background:var(--amber);
  border-color:var(--amber);
  color:var(--asphalt);
  font-weight:700;
}

/* ===== results grid ===== */
.results{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:12px;
  margin-top:28px;
}
@media (max-width:640px){ .results{grid-template-columns:1fr 1fr;} }
.result-card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:18px 16px;
}
.result-card .k{
  font-family:'JetBrains Mono',monospace;
  font-size:10.5px;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--chalk-dim);
  margin-bottom:8px;
}
.result-card .v{
  font-family:'JetBrains Mono',monospace;
  font-weight:700;
  font-size:24px;
  color:var(--chalk);
}
.result-card .v span{
  font-size:13px;
  font-weight:400;
  color:var(--chalk-dim);
  margin-left:2px;
}

/* ===== sections ===== */
.section{margin-top:56px;}
.section-head{
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  margin-bottom:18px;
  border-bottom:1px solid var(--line);
  padding-bottom:12px;
  flex-wrap:wrap;
  gap:8px;
}
.section-head h2{
  font-family:'Archivo Expanded',sans-serif;
  font-size:20px;
  font-weight:700;
  margin:0;
}
.section-head .tag{
  font-family:'JetBrains Mono',monospace;
  font-size:11px;
  color:var(--chalk-dim);
}

.cost-panel{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:28px;
}
@media (max-width:520px){ .cost-panel{padding:20px;} }
.cost-inputs{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:20px;
  margin-bottom:24px;
}
@media (max-width:520px){ .cost-inputs{grid-template-columns:1fr;} }
.field label{
  display:block;
  font-family:'JetBrains Mono',monospace;
  font-size:11px;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--chalk-dim);
  margin-bottom:8px;
}
.field-row{
  display:flex;
  align-items:center;
  background:var(--panel-2);
  border:1px solid var(--line);
  border-radius:8px;
  padding:10px 12px;
}
.field-row:focus-within{border-color:var(--amber);}
.field-row .prefix{
  color:var(--chalk-dim);
  font-family:'JetBrains Mono',monospace;
  margin-right:6px;
  font-size:15px;
  white-space:nowrap;
}
.field-row input{
  background:none;
  border:none;
  outline:none;
  color:var(--chalk);
  font-family:'JetBrains Mono',monospace;
  font-size:16px;
  width:100%;
}
.field-row select{
  background:none;
  border:none;
  outline:none;
  color:var(--chalk);
  font-family:'JetBrains Mono',monospace;
  font-size:14px;
  width:100%;
  cursor:pointer;
}
.field-row select option{background:var(--panel-2); color:var(--chalk);}

.cost-output{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:12px;
}
@media (max-width:520px){ .cost-output{grid-template-columns:1fr;} }
.cost-big{
  background:var(--panel-2);
  border:1px solid var(--line);
  border-radius:10px;
  padding:20px;
}
.cost-big .k{
  font-family:'JetBrains Mono',monospace;
  font-size:11px;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--chalk-dim);
  margin-bottom:6px;
}
.cost-big .v{
  font-family:'JetBrains Mono',monospace;
  font-weight:700;
  font-size:28px;
  color:var(--amber);
}
.cost-big .v span{
  font-size:13px;
  color:var(--chalk-dim);
  font-weight:400;
  margin-left:4px;
}
.cost-big.alert .v{color:var(--rust);}
.cost-big.good .v{color:var(--green);}

/* EV compare bars */
.ev-bars{margin-top:24px;}
.ev-row{
  display:grid;
  grid-template-columns:90px 1fr 90px;
  align-items:center;
  gap:12px;
  margin-bottom:14px;
}
.ev-row .label{
  font-family:'JetBrains Mono',monospace;
  font-size:12px;
  color:var(--chalk-dim);
}
.ev-row .amt{
  font-family:'JetBrains Mono',monospace;
  font-size:13px;
  color:var(--chalk);
  text-align:right;
}
.bar-track{
  background:var(--panel-2);
  border-radius:6px;
  height:14px;
  overflow:hidden;
  border:1px solid var(--line);
}
.bar-fill{
  height:100%;
  border-radius:6px;
  transition:width .5s ease;
}
.bar-fill.gas{background:var(--rust);}
.bar-fill.ev{background:var(--green);}

.note{
  font-size:13px;
  color:var(--chalk-dim);
  margin-top:16px;
  line-height:1.6;
}
.note b{color:var(--chalk);}

/* ===== SEO copy blocks ===== */
.copy{
  color:var(--chalk-dim);
  font-size:15px;
  line-height:1.7;
}
.copy p{margin:0 0 16px;}
.copy strong{color:var(--chalk);}
.copy-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
}
@media (max-width:640px){ .copy-grid{grid-template-columns:1fr;} }

/* reference table */
.reftable{
  width:100%;
  border-collapse:collapse;
  font-family:'JetBrains Mono',monospace;
  font-size:13px;
  margin-top:8px;
}
.reftable th,.reftable td{
  text-align:left;
  padding:10px 12px;
  border-bottom:1px solid var(--line);
}
.reftable th{
  color:var(--chalk-dim);
  font-weight:500;
  font-size:11px;
  letter-spacing:0.06em;
  text-transform:uppercase;
}
.reftable td{color:var(--chalk);}

/* FAQ accordion */
.faq-item{
  border-bottom:1px solid var(--line);
}
.faq-item:first-child{padding-top:0;}
.faq-item .q{
  font-family:'Archivo Expanded',sans-serif;
  font-weight:700;
  font-size:15px;
  margin:0;
  padding:18px 0;
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  color:var(--chalk);
  transition:color .15s;
}
.faq-item .q:hover{color:var(--amber);}
.faq-item .chev{
  flex-shrink:0;
  width:18px;
  height:18px;
  transition:transform .2s ease;
  color:var(--chalk-dim);
}
.faq-item.open .chev{
  transform:rotate(180deg);
  color:var(--amber);
}
.faq-item .a-wrap{
  max-height:0;
  overflow:hidden;
  transition:max-height .25s ease;
}
.faq-item.open .a-wrap{
  max-height:240px;
}
.faq-item .a{
  color:var(--chalk-dim);
  font-size:14px;
  line-height:1.65;
  margin:0;
  padding:0 0 18px;
}

/* pill badges (PSI tool guidance) */
.pill-row{display:flex; gap:8px; flex-wrap:wrap; margin-top:6px;}
.pill{
  font-family:'JetBrains Mono',monospace;
  font-size:11px;
  padding:6px 12px;
  border-radius:999px;
  border:1px solid var(--line);
  background:var(--panel-2);
  color:var(--chalk-dim);
  cursor:pointer;
  transition:all .15s;
}
.pill.active{
  background:var(--amber);
  border-color:var(--amber);
  color:var(--asphalt);
  font-weight:700;
}

.guidance-banner{
  background:var(--panel-2);
  border:1px solid var(--line);
  border-left:3px solid var(--amber);
  border-radius:10px;
  padding:18px 20px;
  margin-top:20px;
}
.guidance-banner .k{
  font-family:'JetBrains Mono',monospace;
  font-size:11px;
  letter-spacing:0.08em;
  text-transform:uppercase;
  color:var(--amber);
  margin-bottom:6px;
}
.guidance-banner .v{
  font-family:'JetBrains Mono',monospace;
  font-weight:700;
  font-size:22px;
  color:var(--chalk);
}
.guidance-banner .d{
  font-size:13px;
  color:var(--chalk-dim);
  margin-top:8px;
  line-height:1.6;
}

/* ===== hub cards (index page) ===== */
.tool-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
  margin-top:16px;
}
@media (max-width:640px){ .tool-grid{grid-template-columns:1fr;} }
.tool-card{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:24px;
  text-decoration:none;
  display:block;
  transition:border-color .15s, transform .15s;
}
.tool-card:hover{border-color:var(--amber); transform:translateY(-2px);}
.tool-card .num{
  font-family:'JetBrains Mono',monospace;
  font-size:11px;
  color:var(--amber);
  margin-bottom:10px;
}
.tool-card h3{
  font-family:'Archivo Expanded',sans-serif;
  font-size:17px;
  margin:0 0 8px;
  color:var(--chalk);
}
.tool-card p{
  font-size:13px;
  color:var(--chalk-dim);
  margin:0;
  line-height:1.55;
}
.tool-card.soon{opacity:0.45; pointer-events:none;}

footer.sitefoot{
  margin-top:60px;
  padding-top:24px;
  border-top:1px solid var(--line);
  font-family:'JetBrains Mono',monospace;
  font-size:11px;
  color:var(--chalk-dim);
  letter-spacing:0.03em;
}

/* ===== homepage hero cluster ===== */
.hero-stage{
  position:relative;
  margin:8px 0 44px;
  padding:48px 20px 40px;
  border-radius:var(--radius);
  overflow:hidden;
  background:
    radial-gradient(ellipse 560px 320px at 50% -10%, rgba(232,163,61,0.32), transparent 68%),
    radial-gradient(ellipse 400px 200px at 15% 100%, rgba(124,179,154,0.10), transparent 70%),
    radial-gradient(ellipse 400px 200px at 85% 100%, rgba(194,99,75,0.10), transparent 70%),
    var(--panel);
  border:1px solid var(--line);
  box-shadow: inset 0 1px 0 rgba(232,163,61,0.08);
}
.topbar{
  height:3px;
  background:linear-gradient(90deg, var(--rust), var(--amber) 50%, var(--green));
}
.hero-cluster{
  display:flex;
  justify-content:center;
  gap:8px;
  flex-wrap:wrap;
  position:relative;
  z-index:1;
}
.hero-gauge{
  display:flex;
  flex-direction:column;
  align-items:center;
  width:130px;
}
.hero-gauge .glabel{
  font-family:'JetBrains Mono',monospace;
  font-size:10px;
  letter-spacing:0.12em;
  text-transform:uppercase;
  color:var(--chalk-dim);
  margin-top:6px;
}
.hero-gauge .gvalue{
  font-family:'JetBrains Mono',monospace;
  font-weight:700;
  font-size:14px;
  color:var(--amber);
}
.hero-needle{
  transform-origin:60px 60px;
  transform:rotate(-85deg);
  animation:sweepNeedle 1.4s cubic-bezier(.34,1.4,.4,1) forwards;
}
.hero-gauge:nth-child(1) .hero-needle{ animation-delay:0.1s; }
.hero-gauge:nth-child(2) .hero-needle{ animation-delay:0.28s; }
.hero-gauge:nth-child(3) .hero-needle{ animation-delay:0.46s; }
.hero-gauge:nth-child(4) .hero-needle{ animation-delay:0.64s; }
@keyframes sweepNeedle{
  0%{ transform:rotate(-85deg); }
  100% { transform:rotate(var(--end-angle)); }
}

/* ===== tool card icons ===== */
.tool-card .card-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-bottom:14px;
}
.tool-card .icon-badge{
  width:38px;
  height:38px;
  border-radius:9px;
  background:var(--panel-2);
  border:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:center;
  transition:border-color .15s, background .15s;
}
.tool-card:hover .icon-badge{
  border-color:var(--amber);
  background:rgba(232,163,61,0.1);
}
.tool-card .icon-badge svg{
  width:19px;
  height:19px;
  stroke:var(--amber);
}