:root{
  --white:#fff;
  --ink:#15131b;
  --muted:#716e78;
  --line:#e9e6ef;
  --soft:#f7f6fa;
  --violet:#7657ff;
  --blue:#537dff;
  --pink:#eb4f9d;
  --orange:#ff8b62;
  --rest:#ddd9e5;
  --radius:30px;
}
*{box-sizing:border-box}
html{color-scheme:light}
body{
  margin:0;
  font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  background:var(--white);
  color:var(--ink);
  overflow-x:hidden;
}
.page-bg{position:fixed;inset:0;z-index:0;overflow:hidden;pointer-events:none}
.splash{position:absolute;display:block;filter:blur(48px);opacity:.36;will-change:transform}
.splash-one{
  width:640px;height:640px;right:-210px;top:55px;
  border-radius:42% 58% 68% 32% / 52% 38% 62% 48%;
  background:
    radial-gradient(circle at 28% 31%,var(--violet) 0 17%,transparent 47%),
    radial-gradient(circle at 67% 39%,var(--pink) 0 16%,transparent 45%),
    radial-gradient(circle at 43% 74%,var(--orange) 0 18%,transparent 48%),
    radial-gradient(circle at 72% 70%,var(--blue) 0 14%,transparent 44%);
  animation:splash-one-drift 18s cubic-bezier(.45,0,.55,1) infinite alternate;
}
.splash-two{
  width:360px;height:360px;left:-185px;top:690px;
  border-radius:67% 33% 43% 57% / 38% 62% 38% 62%;
  background:radial-gradient(circle at 58% 42%,var(--violet),transparent 53%),radial-gradient(circle at 42% 66%,var(--pink),transparent 55%);
  opacity:.18;
  animation:splash-two-drift 22s cubic-bezier(.45,0,.55,1) infinite alternate;
}
@keyframes splash-one-drift{
  0%{transform:translate3d(0,0,0) rotate(0deg) scale(1)}
  33%{transform:translate3d(-58px,34px,0) rotate(5deg) scale(1.05)}
  68%{transform:translate3d(-22px,92px,0) rotate(-4deg) scale(.97)}
  100%{transform:translate3d(-96px,58px,0) rotate(7deg) scale(1.08)}
}
@keyframes splash-two-drift{
  0%{transform:translate3d(0,0,0) rotate(0deg) scale(1)}
  42%{transform:translate3d(105px,-48px,0) rotate(-8deg) scale(1.1)}
  100%{transform:translate3d(58px,112px,0) rotate(6deg) scale(.94)}
}
.site-header{position:relative;z-index:1;max-width:1120px;margin:0 auto;padding:24px 22px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.brand{display:flex;align-items:center;gap:11px;font-size:1.05rem;font-weight:900;letter-spacing:-.03em}
.brand-mark{
  width:31px;height:31px;display:block;
  border-radius:64% 36% 57% 43% / 45% 61% 39% 55%;
  background:conic-gradient(from 220deg,var(--blue),var(--violet),var(--pink),var(--orange),var(--blue));
  box-shadow:0 8px 22px rgba(118,87,255,.25);
}
.status{font-size:.75rem;font-weight:850;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:10px 14px;background:rgba(255,255,255,.78);backdrop-filter:blur(12px)}
.wrap{position:relative;z-index:1;max-width:1120px;margin:0 auto;padding:34px 22px 72px}
.hero{padding:54px 0 58px;max-width:900px}
.eyebrow{
  display:flex;align-items:center;gap:9px;font-size:.76rem;font-weight:850;letter-spacing:.13em;text-transform:uppercase;
  color:var(--muted);margin-bottom:18px;
}
.eyebrow::before{content:"";width:9px;height:9px;border-radius:50%;background:linear-gradient(135deg,var(--violet),var(--pink));box-shadow:0 0 0 5px rgba(118,87,255,.08)}
h1{font-size:clamp(3.1rem,7.8vw,6.5rem);line-height:.91;letter-spacing:-.075em;margin:0 0 26px;max-width:940px}
.gradient-text{background:linear-gradient(105deg,var(--blue),var(--violet) 42%,var(--pink) 75%,var(--orange));background-clip:text;-webkit-background-clip:text;color:transparent;-webkit-text-fill-color:transparent}
.lead{max-width:700px;font-size:clamp(1.05rem,2vw,1.28rem);line-height:1.6;color:var(--muted);margin:0}
.grid{display:grid;grid-template-columns:minmax(0,.82fr) minmax(0,1.18fr);gap:22px;align-items:start}
.card{background:rgba(255,255,255,.88);border:1px solid var(--line);border-radius:var(--radius);padding:clamp(22px,3vw,32px);box-shadow:0 24px 70px rgba(34,25,57,.08);backdrop-filter:blur(18px)}
.input-card{background:linear-gradient(145deg,rgba(255,255,255,.97),rgba(249,247,255,.92))}
.card-kicker{font-size:.73rem;font-weight:900;letter-spacing:.12em;text-transform:uppercase;color:var(--violet);margin-bottom:8px}
.card-title{font-size:1.55rem;letter-spacing:-.04em;margin:0 0 25px}
label,.field-title{display:block;font-size:.86rem;font-weight:800;margin:0 0 8px}
.field{margin-bottom:18px}
select,input{
  width:100%;border:1px solid var(--line);border-radius:16px;background:var(--soft);color:var(--ink);
  min-height:54px;padding:0 15px;font:inherit;font-size:16px;font-weight:700;outline:none;transition:border-color .2s,box-shadow .2s,background .2s;
}
select:focus,input:focus{border-color:var(--violet);background:#fff;box-shadow:0 0 0 4px rgba(118,87,255,.1)}
.inline{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.help{font-size:.78rem;line-height:1.45;color:var(--muted);margin-top:7px}
.co2-fact{margin:23px 0 0;padding:15px 16px;border-radius:17px;background:linear-gradient(120deg,rgba(83,125,255,.09),rgba(235,79,157,.09));border:1px solid rgba(118,87,255,.12)}
.co2-fact .field-title{margin-bottom:3px}
.result-card{position:relative;overflow:hidden}
.result-card::after{content:"";position:absolute;width:240px;height:240px;right:-130px;top:-145px;border-radius:50%;background:linear-gradient(135deg,var(--violet),var(--pink),var(--orange));filter:blur(24px);opacity:.18;pointer-events:none}
.result-head{display:flex;justify-content:space-between;gap:14px;align-items:flex-start;margin-bottom:20px}
.result-label{font-size:.82rem;font-weight:800;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}
.big{font-size:clamp(3.6rem,7vw,5.8rem);font-weight:950;letter-spacing:-.075em;line-height:.92;margin-top:10px;background:linear-gradient(100deg,var(--blue),var(--violet) 40%,var(--pink) 78%,var(--orange));background-clip:text;-webkit-background-clip:text;color:transparent;-webkit-text-fill-color:transparent}
.percent{font-size:1.25rem;font-weight:800;margin-top:7px}
.badge{background:linear-gradient(120deg,rgba(118,87,255,.1),rgba(235,79,157,.1));color:#5a3bc9;border:1px solid rgba(118,87,255,.12);border-radius:999px;padding:9px 12px;font-size:.75rem;font-weight:850;white-space:nowrap}
.bar{height:14px;background:var(--soft);border-radius:999px;overflow:hidden;display:flex;margin:24px 0 24px}
.bar-state{background:linear-gradient(90deg,var(--blue),var(--violet),var(--pink),var(--orange));height:100%;border-radius:999px}
.bar-rest{background:var(--rest);height:100%}
.rows{display:grid;gap:0}
.row{display:grid;grid-template-columns:1fr auto;gap:15px;padding:13px 0;border-top:1px solid var(--line)}
.row:first-child{border-top:0}
.row strong{font-size:.98rem}
.row span:last-child{font-weight:850}
.sub{display:block;font-size:.76rem;font-weight:500;color:var(--muted);margin-top:3px}
.more-btn{
  width:100%;margin-top:20px;min-height:52px;border:0;border-radius:999px;
  background:var(--ink);color:#fff;font:inherit;font-weight:850;cursor:pointer;padding:0 18px;transition:transform .2s,box-shadow .2s,background .2s;
}
.more-btn:hover{background:#2b2735;transform:translateY(-1px);box-shadow:0 12px 28px rgba(21,19,27,.18)}
.more-btn:focus-visible{outline:3px solid rgba(118,87,255,.35);outline-offset:3px}
.more-calc{margin-top:16px;padding-top:16px;border-top:1px solid var(--line)}
.tank{
  margin-top:4px;padding:18px;background:linear-gradient(125deg,rgba(83,125,255,.08),rgba(235,79,157,.08),rgba(255,139,98,.08));border-radius:20px;
  display:grid;grid-template-columns:1fr 1fr;gap:12px
}
.metric .k{font-size:.76rem;color:var(--muted);font-weight:800;text-transform:uppercase;letter-spacing:.06em}
.metric .v{font-size:1.45rem;font-weight:900;margin-top:4px}
.future-box{position:relative;overflow:hidden;margin-top:22px;padding:clamp(24px,4vw,38px);display:grid;grid-template-columns:auto 1fr;gap:24px;align-items:start;border-radius:28px;background:var(--ink);color:#fff;box-shadow:0 24px 70px rgba(21,19,27,.14)}
.future-box::after{content:"";position:absolute;width:310px;height:310px;right:-145px;bottom:-205px;border-radius:58% 42% 66% 34% / 45% 61% 39% 55%;background:linear-gradient(135deg,var(--blue),var(--violet),var(--pink),var(--orange));filter:blur(22px);opacity:.45;pointer-events:none}
.future-year{position:relative;z-index:1;display:inline-flex;align-items:center;justify-content:center;min-width:92px;padding:10px 14px;border-radius:999px;background:linear-gradient(110deg,var(--blue),var(--violet),var(--pink));font-size:.76rem;font-weight:900;letter-spacing:.09em;text-transform:uppercase}
.future-content{position:relative;z-index:1;max-width:760px}
.future-content h2{margin:0 0 10px;font-size:clamp(1.45rem,3vw,2.1rem);line-height:1.05;letter-spacing:-.045em}
.future-content p{margin:0;color:rgba(255,255,255,.72);font-size:.96rem;line-height:1.65}
.future-content strong{color:#fff}
.future-content a{color:#fff;text-underline-offset:3px}
.note{margin-top:22px;padding:24px 26px;border:1px solid var(--line);border-radius:24px;background:rgba(255,255,255,.78);color:var(--muted);font-size:.83rem;line-height:1.65}
.note strong{color:var(--ink)}
.note a,.footer a{color:var(--ink);text-underline-offset:2px}
.footer{margin-top:26px;padding:0 3px;font-size:.78rem;color:var(--muted);line-height:1.7}
@media(max-width:760px){
  .site-header{padding:18px}
  .brand{font-size:.96rem}
  .status{display:none}
  .wrap{padding:18px 18px 54px}
  .hero{padding:34px 0 40px}
  h1{font-size:clamp(2.9rem,14vw,4.3rem)}
  .grid{grid-template-columns:1fr}
  .inline{grid-template-columns:1fr}
  .tank{grid-template-columns:1fr}
  .future-box{grid-template-columns:1fr;gap:16px}
  .future-year{justify-self:start}
  .result-head{display:block}
  .badge{display:inline-block;margin-top:12px}
  .splash-one{width:430px;height:430px;right:-230px;top:80px;opacity:.28}
  .splash-two{display:none}
}
@media(prefers-reduced-motion:reduce){
  .splash{animation:none}
}

.brand{color:var(--ink);text-decoration:none}
.result-context{margin-top:7px;color:var(--muted);font-size:.83rem;font-weight:700}
.result-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:20px}
.share-btn,.result-actions .more-btn{
  width:100%;min-height:52px;border-radius:999px;font:inherit;font-weight:850;cursor:pointer;padding:0 18px;transition:transform .2s,box-shadow .2s,background .2s,border-color .2s
}
.share-btn{border:0;background:var(--ink);color:#fff}
.share-btn:hover{background:#2b2735;transform:translateY(-1px);box-shadow:0 12px 28px rgba(21,19,27,.18)}
.share-btn:focus-visible,.result-actions .more-btn:focus-visible{outline:3px solid rgba(118,87,255,.35);outline-offset:3px}
.result-actions .more-btn{margin:0;border:1px solid var(--line);background:#fff;color:var(--ink);box-shadow:none}
.result-actions .more-btn:hover{background:var(--soft);border-color:#d8d3e1;box-shadow:none}
.share-status{min-height:20px;margin-top:8px;text-align:center;color:var(--muted);font-size:.78rem;font-weight:750}
.knowledge{margin-top:clamp(64px,9vw,110px)}
.section-heading{max-width:780px;margin-bottom:26px}
.section-heading.compact{margin-bottom:20px}
.section-heading .eyebrow{margin-bottom:13px}
.section-heading h2,.method h2,.legal-page h1,.legal-page h2{letter-spacing:-.05em}
.section-heading h2{font-size:clamp(2.25rem,5vw,4.2rem);line-height:.98;margin:0 0 18px}
.section-heading p{font-size:clamp(1rem,1.8vw,1.16rem);line-height:1.65;color:var(--muted);margin:0}
.answer-box{position:relative;overflow:hidden;padding:clamp(25px,4vw,38px);border-radius:28px;background:linear-gradient(125deg,rgba(83,125,255,.09),rgba(118,87,255,.08),rgba(235,79,157,.08),rgba(255,139,98,.08));border:1px solid rgba(118,87,255,.12)}
.answer-box h3{margin:0 0 10px;font-size:clamp(1.25rem,2.5vw,1.75rem);letter-spacing:-.035em}
.answer-box p{margin:0;max-width:820px;color:var(--muted);line-height:1.68}
.answer-box strong{color:var(--ink)}
.info-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:16px}
.info-card{padding:25px;border:1px solid var(--line);border-radius:24px;background:rgba(255,255,255,.82)}
.info-number{display:inline-block;margin-bottom:24px;font-size:.72rem;font-weight:900;letter-spacing:.1em;color:var(--violet)}
.info-card h3{margin:0 0 9px;font-size:1.15rem;letter-spacing:-.025em}
.info-card p{margin:0;color:var(--muted);font-size:.9rem;line-height:1.62}
.faq{margin-top:clamp(60px,8vw,96px);max-width:900px}
.faq details{border-top:1px solid var(--line)}
.faq details:last-child{border-bottom:1px solid var(--line)}
.faq summary{position:relative;padding:20px 42px 20px 0;font-weight:850;cursor:pointer;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:4px;top:15px;font-size:1.5rem;font-weight:500;color:var(--violet)}
.faq details[open] summary::after{content:"–"}
.faq details p{margin:-4px 0 22px;max-width:760px;color:var(--muted);line-height:1.65}
.method h2{margin:0 0 10px;font-size:1.35rem;color:var(--ink)}
.method p{margin:0}
.footer{display:grid;grid-template-columns:1.35fr auto 1fr;gap:22px;align-items:start;border-top:1px solid var(--line);padding-top:24px}
.footer-links{display:flex;flex-wrap:wrap;gap:8px 16px}
.legal-page{max-width:860px;padding-top:58px}
.legal-page h1{font-size:clamp(3rem,8vw,5.7rem);line-height:.94;margin:0 0 22px}
.legal-intro{font-size:1.08rem;line-height:1.65;color:var(--muted);margin:0 0 42px}
.legal-card{margin:18px 0;padding:clamp(22px,4vw,34px);border:1px solid var(--line);border-radius:26px;background:rgba(255,255,255,.86)}
.legal-card h2{font-size:1.45rem;margin:0 0 14px}
.legal-card h3{font-size:1rem;margin:22px 0 8px}
.legal-card p,.legal-card li{color:var(--muted);line-height:1.68}
.legal-card p{margin:0 0 13px}
.legal-card p:last-child{margin-bottom:0}
.legal-card ul{padding-left:20px;margin:10px 0}
.legal-card a{color:var(--ink);text-underline-offset:3px}
.legal-footer{max-width:860px}
.method-lead{max-width:760px}
.method-table-wrap{overflow-x:auto;margin:18px 0 8px;border:1px solid var(--line);border-radius:18px;background:#fff}
.method-table{width:100%;border-collapse:collapse;min-width:650px}
.method-table th,.method-table td{padding:15px 17px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
.method-table tr:last-child td{border-bottom:0}
.method-table th{font-size:.72rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);background:var(--soft)}
.method-table td{font-size:.9rem;color:var(--muted)}
.method-table td:first-child{font-weight:850;color:var(--ink)}
.formula{margin:14px 0;padding:15px 18px;border-radius:16px;background:var(--soft);font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;font-size:.86rem;line-height:1.6;color:var(--ink);overflow-wrap:anywhere}
.example-total{margin-top:18px;padding:20px;border-radius:18px;background:linear-gradient(125deg,rgba(83,125,255,.09),rgba(235,79,157,.09));color:var(--ink);font-weight:850}
.source-list{padding-left:21px}
.source-list li{margin-bottom:10px}
.method-back{display:inline-flex;align-items:center;justify-content:center;width:auto;min-width:190px;text-decoration:none}
@media(max-width:760px){
  .result-actions,.info-grid,.footer{grid-template-columns:1fr}
  .footer{gap:14px}
  .section-heading h2{font-size:clamp(2.2rem,12vw,3.25rem)}
  .knowledge{margin-top:64px}
  .legal-page{padding-top:34px}
}