:root{
  --bg: #F7F5F1;
  --bg-deep: #0B1F2A;
  --surface: #FFFFFF;
  --surface-hi: #FBFAF7;
  --line: rgba(20,25,25,0.09);
  --text: #1C2225;
  --muted: #6B7680;
  --spark: #E8A400;
  --spark-dim: rgba(232,164,0,0.12);
  --copper: #B85C2C;
  --good: #1E9E5A;
  --meter-text: #F2B705;
  --meter-text-soft: #EAF2F2;
  --meter-muted: #8FA6AC;
  --meter-line: rgba(234,242,242,0.10);
}
*{box-sizing:border-box;}
body{
  margin:0;
  background: var(--bg);
  color:var(--text);
  font-family:'Inter',sans-serif;
  -webkit-font-smoothing:antialiased;
}
.wrap{max-width:960px;margin:0 auto;padding:0 24px;}
a{color:var(--spark);}

/* ---- header ---- */
header{padding:28px 0 8px;}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;width:fit-content;}
.brand-mark{
  width:34px;height:34px;border-radius:8px;flex-shrink:0;
  background:linear-gradient(160deg, var(--spark), var(--copper));
  display:flex;align-items:center;justify-content:center;
  font-family:'JetBrains Mono';font-weight:700;color:#fff;font-size:16px;
}
.brand-name{font-family:'Space Grotesk';font-weight:700;font-size:19px;letter-spacing:-0.01em;color:var(--text);}
.brand-name span{color:var(--copper);}
nav.top-nav{display:flex;gap:22px;margin-top:18px;}
nav.top-nav a{
  color:var(--muted);text-decoration:none;font-size:14px;font-family:'Inter';font-weight:500;
  padding-bottom:4px;border-bottom:2px solid transparent;
}
nav.top-nav a:hover, nav.top-nav a.active{color:var(--text);border-color:var(--spark);}

/* ---- hero ---- */
.hero{padding:34px 0 8px;}
.eyebrow{
  font-family:'JetBrains Mono';font-size:12px;letter-spacing:0.14em;text-transform:uppercase;
  color:var(--muted);margin:0 0 10px;
}
h1{
  font-family:'Space Grotesk';font-weight:700;font-size:clamp(28px,4vw,42px);
  line-height:1.08;letter-spacing:-0.02em;margin:0 0 12px;max-width:640px;
}
h2{font-family:'Space Grotesk';font-weight:600;font-size:22px;letter-spacing:-0.01em;}
.sub{color:var(--muted);font-size:16px;max-width:520px;line-height:1.55;margin:0 0 28px;}

/* ---- meter readout ---- */
.meter{
  background: var(--bg-deep);
  border:1px solid rgba(0,0,0,0.15);
  border-radius:16px;padding:22px 24px;
  display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:30px;
  position:relative;overflow:hidden;
  box-shadow: 0 12px 28px -14px rgba(11,31,42,0.35);
}
.meter::before{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(100deg, transparent 0 26px, rgba(234,242,242,0.025) 26px 27px);
  pointer-events:none;
}
.meter-label{font-family:'JetBrains Mono';font-size:11px;letter-spacing:0.1em;text-transform:uppercase;color:var(--meter-muted);}
.meter-digits{
  font-family:'JetBrains Mono';font-weight:700;font-size:clamp(30px,5.5vw,46px);color:var(--meter-text);
  letter-spacing:0.01em;font-variant-numeric: tabular-nums;text-shadow:0 0 22px rgba(242,183,5,0.25);
}
.meter-unit{font-family:'JetBrains Mono';font-size:13px;color:var(--meter-muted);margin-top:4px;}
.meter-col{position:relative;z-index:1;}
.meter-col.r{text-align:right;}
.meter-per{display:flex;gap:22px;flex-wrap:wrap;justify-content:flex-end;}

/* ---- panel ---- */
.panel{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:24px;margin-bottom:20px;box-shadow:0 4px 16px -8px rgba(20,25,25,0.08);}
.panel h2.panel-title{font-size:15px;font-weight:600;margin:0 0 4px;}
.panel .hint{color:var(--muted);font-size:13px;margin:0 0 18px;}

.rate-row{display:flex;align-items:flex-end;gap:16px;flex-wrap:wrap;margin-bottom:6px;}
.field{display:flex;flex-direction:column;gap:6px;}
.field label{font-size:12px;color:var(--muted);font-family:'JetBrains Mono';letter-spacing:0.03em;}

.info-tip-wrap{
  position:relative;
  display:inline-block;
}
.info-tip{
  cursor:help;
  color:var(--spark);
  font-weight:700;
}
.info-tip-box{
  position:absolute;
  bottom:135%;
  left:50%;
  transform:translateX(-50%);
  width:220px;
  background:var(--bg-deep);
  color:var(--meter-text-soft);
  padding:12px 14px;
  border-radius:10px;
  font-family:'Inter';
  font-size:12.5px;
  font-weight:400;
  letter-spacing:normal;
  line-height:1.5;
  text-align:left;
  opacity:0;
  visibility:hidden;
  pointer-events:none;
  transition:opacity .15s ease;
  box-shadow:0 10px 24px -10px rgba(11,31,42,0.45);
  z-index:20;
}
.info-tip-box strong{color:var(--spark);display:block;margin-bottom:6px;}
.info-tip-box ul{margin:0;padding-left:16px;}
.info-tip-box li{margin-bottom:3px;}
.info-tip-box code{
  background:rgba(242,183,5,0.15);color:var(--spark);
  padding:1px 5px;border-radius:4px;font-family:'JetBrains Mono';font-size:12px;
}
.info-tip-box::after{
  content:"";
  position:absolute;
  top:100%;
  left:50%;
  transform:translateX(-50%);
  border:6px solid transparent;
  border-top-color:var(--bg-deep);
}
.info-tip-wrap:hover .info-tip-box,
.info-tip-wrap:focus-within .info-tip-box{opacity:1;visibility:visible;}
.field input, .field select{
  background:var(--bg-deep);border:1px solid var(--line);color:var(--meter-text-soft);border-radius:10px;
  padding:10px 12px;font-size:14px;font-family:'Inter';outline:none;min-width:0;
}
.field input:focus, .field select:focus{border-color:var(--spark);}
.field input::placeholder{color:var(--meter-muted);}
.field option{background:var(--bg-deep);color:var(--meter-text-soft);}
.field.grow{flex:1;min-width:160px;}

.appliance{
  display:grid;grid-template-columns: 2fr 1fr 64px 76px auto;gap:10px;align-items:end;
  padding:14px 0;border-top:1px solid var(--line);
}
.appliance:first-of-type{border-top:none;}
.remove-btn{
  background:transparent;border:1px solid var(--line);color:var(--muted);border-radius:10px;
  width:38px;height:38px;cursor:pointer;font-size:16px;display:flex;align-items:center;justify-content:center;
}
.remove-btn:hover{border-color:var(--copper);color:var(--copper);}
.custom-hint{
  grid-column:1 / -1;
  font-size:13px;
  color:var(--copper);
  background:rgba(193,98,44,0.1);
  border:1px solid rgba(193,98,44,0.25);
  border-radius:10px;
  padding:8px 12px;
  margin-top:2px;
}
.row-result{
  grid-column:1 / -1;
  margin-top:4px;
  display:inline-flex;align-items:center;gap:16px;
  background:var(--spark-dim);
  border:1px solid rgba(232,164,0,0.28);
  border-radius:10px;
  padding:10px 14px;
  width:fit-content;
  max-width:100%;
}
.row-result .kwh{font-family:'JetBrains Mono';font-size:12.5px;color:var(--muted);white-space:nowrap;}
.row-result .cost{font-family:'JetBrains Mono';font-size:15px;font-weight:700;color:var(--copper);white-space:nowrap;}

.add-btn{
  margin-top:16px;background:transparent;border:1px dashed var(--line);color:var(--text);
  padding:11px 16px;border-radius:10px;font-family:'Inter';font-weight:500;font-size:14px;
  cursor:pointer;display:flex;align-items:center;gap:8px;width:100%;justify-content:center;
}
.add-btn:hover{border-color:var(--spark);color:var(--spark);}

.breakdown{width:100%;border-collapse:collapse;margin-top:6px;}
.breakdown th{
  text-align:left;font-family:'JetBrains Mono';font-size:11px;color:var(--muted);
  text-transform:uppercase;letter-spacing:0.06em;font-weight:500;padding:0 0 10px;border-bottom:1px solid var(--line);
}
.breakdown td{padding:10px 0;border-bottom:1px solid var(--line);font-size:14px;}
.breakdown td.num{font-family:'JetBrains Mono';color:var(--text);text-align:right;}
.breakdown tr:last-child td{border-bottom:none;}

/* ---- blog ---- */
.post-card{
  display:block;background:var(--surface);border:1px solid var(--line);border-radius:14px;box-shadow:0 4px 16px -8px rgba(20,25,25,0.08);
  padding:20px 22px;margin-bottom:14px;text-decoration:none;color:var(--text);
}
.post-card:hover{border-color:var(--spark);}
.post-card .eyebrow{margin-bottom:8px;}
.post-card h3{font-family:'Space Grotesk';font-size:18px;margin:0 0 6px;}
.post-card p{color:var(--muted);font-size:14px;margin:0;line-height:1.5;}

article.post{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:32px;margin-bottom:24px;box-shadow:0 4px 16px -8px rgba(20,25,25,0.08);}
article.post h1{font-size:clamp(24px,3.5vw,32px);}
article.post p{line-height:1.7;color:var(--text);font-size:15.5px;}
article.post .lead{
  color:var(--text);
  font-weight:600;
  font-size:17px;
  line-height:1.65;
  border-left:3px solid var(--spark);
  padding-left:16px;
}
article.post ul{line-height:1.8;font-size:15px;}
article.post figure{margin:22px 0;}
article.post img{
  width:100%;height:auto;display:block;
  border-radius:14px;
  border:1px solid var(--line);
}
article.post figcaption{font-size:12.5px;color:var(--muted);text-align:center;margin-top:8px;}
.cta-box{
  background:var(--spark-dim);border:1px solid rgba(242,183,5,0.3);border-radius:14px;
  padding:20px 22px;margin:26px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
}
.cta-box p{margin:0;color:var(--text);font-size:14.5px;}
.cta-box a.btn{
  background:var(--spark);color:var(--bg-deep);text-decoration:none;font-weight:600;font-size:14px;
  padding:10px 18px;border-radius:9px;white-space:nowrap;
}

footer{padding:36px 0 50px;color:var(--muted);font-size:13px;text-align:center;}
footer a{color:var(--spark);text-decoration:none;}

@media (max-width:640px){
  .appliance{grid-template-columns:1fr 1fr;}
  .appliance .remove-btn{justify-self:end;}
  .meter{flex-direction:column;align-items:flex-start;}
  .meter-col.r{text-align:left;}
  .meter-per{justify-content:flex-start;}
  .cta-box{flex-direction:column;align-items:flex-start;}
}