*{box-sizing:border-box}
:root{
  --bg:#000;
  --panel:#0b0b0b;
  --panel2:#111;
  --text:#fff;
  --muted:rgba(255,255,255,.66);
  --line:rgba(255,255,255,.14);
  --accent:#30D348;
}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font-family:Arial,Helvetica,sans-serif;
  line-height:1.5;
}
a{color:inherit}
.topbar{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:16px;
  padding:18px 18px 10px;
  max-width:1080px;
  margin:0 auto;
}
.brand{
  display:inline-flex;
  flex-direction:column;
  text-decoration:none;
  line-height:1;
}
.brand-script{
  font-family:Georgia,serif;
  font-style:italic;
  font-size:28px;
  letter-spacing:.2px;
}
.brand-sub{
  font-size:10px;
  text-transform:uppercase;
  letter-spacing:2px;
  color:var(--muted);
  margin-left:3px;
}
.shop-link{
  border:1px solid var(--line);
  border-radius:999px;
  padding:10px 14px;
  text-decoration:none;
  font-size:13px;
  color:var(--muted);
}
.hero{
  max-width:860px;
  margin:0 auto;
  padding:52px 18px 24px;
  text-align:center;
}
.eyebrow{
  color:var(--accent);
  text-transform:uppercase;
  letter-spacing:2px;
  font-size:12px;
  font-weight:700;
  margin:0 0 12px;
}
h1{
  font-size:clamp(42px,12vw,82px);
  line-height:.92;
  letter-spacing:-4px;
  margin:0;
}
.hero-copy{
  max-width:620px;
  margin:18px auto 0;
  color:var(--muted);
  font-size:18px;
}
.tool-shell{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:18px;
  max-width:1080px;
  margin:0 auto;
  padding:18px;
}
.calculator,.results,.content{
  border:1px solid var(--line);
  background:linear-gradient(180deg,var(--panel2),var(--panel));
  border-radius:28px;
  box-shadow:0 18px 60px rgba(0,0,0,.4);
}
.calculator{
  padding:22px;
}
.grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:14px;
}
label{
  display:block;
  color:var(--muted);
  font-size:13px;
  font-weight:700;
  margin-bottom:14px;
}
input,select{
  width:100%;
  appearance:none;
  border:1px solid var(--line);
  background:#050505;
  color:#fff;
  border-radius:16px;
  padding:15px 14px;
  font-size:16px;
  margin-top:7px;
  outline:none;
}
input:focus,select:focus{
  border-color:rgba(48,211,72,.75);
  box-shadow:0 0 0 3px rgba(48,211,72,.12);
}
.unit-row{
  display:grid;
  grid-template-columns:1fr auto;
  align-items:center;
  gap:8px;
}
.unit-row span{
  color:var(--muted);
  padding-top:7px;
}
button{
  width:100%;
  border:0;
  background:#fff;
  color:#000;
  border-radius:18px;
  padding:16px 18px;
  font-size:16px;
  font-weight:800;
  cursor:pointer;
  margin-top:2px;
}
button:active{transform:translateY(1px)}
.note{
  color:var(--muted);
  font-size:12px;
  margin:14px 0 0;
}
.results{
  padding:26px;
  display:flex;
  flex-direction:column;
  justify-content:center;
  min-height:390px;
}
.results-kicker{
  color:var(--accent);
  text-transform:uppercase;
  letter-spacing:2px;
  font-size:12px;
  font-weight:800;
  margin:0 0 10px;
}
.results h2{
  font-size:clamp(44px,10vw,78px);
  letter-spacing:-3px;
  line-height:.9;
  margin:0;
}
.goal-text{
  color:var(--muted);
  margin:14px 0 22px;
}
.result-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:10px;
}
.result-grid div{
  border:1px solid var(--line);
  border-radius:18px;
  padding:14px;
  background:rgba(255,255,255,.035);
}
.result-grid span{
  display:block;
  color:var(--muted);
  font-size:12px;
}
.result-grid strong{
  display:block;
  font-size:20px;
  margin-top:3px;
}
.cta{
  display:block;
  text-align:center;
  text-decoration:none;
  background:var(--accent);
  color:#000;
  border-radius:18px;
  padding:15px;
  font-weight:900;
  margin-top:18px;
}
.content{
  max-width:900px;
  margin:24px auto 0;
  padding:28px 22px;
}
.content h2{
  font-size:26px;
  margin:24px 0 8px;
  letter-spacing:-1px;
}
.content h2:first-child{margin-top:0}
.content p,.content li{
  color:var(--muted);
}
.internal-links{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:22px;
}
.internal-links a{
  border:1px solid var(--line);
  border-radius:999px;
  padding:10px 13px;
  color:#fff;
  text-decoration:none;
  font-size:13px;
}
footer{
  max-width:900px;
  margin:0 auto;
  padding:32px 18px 46px;
  color:var(--muted);
  font-size:12px;
  text-align:center;
}
@media(max-width:820px){
  .tool-shell{grid-template-columns:1fr}
  .grid{grid-template-columns:1fr 1fr}
}
@media(max-width:520px){
  .topbar{padding-inline:14px}
  .hero{padding-top:40px}
  h1{letter-spacing:-3px}
  .tool-shell{padding:12px}
  .calculator,.results{border-radius:24px}
  .grid{grid-template-columns:1fr}
  .results{min-height:auto}
}