:root{--bg:#f3f7f5;--ink:#0f2a22;--acc:#10b981;--acc2:#0ea5e9;--gas:#f97316;--card:#fff}
*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,sans-serif;background:var(--bg);color:var(--ink);line-height:1.5}
.hero{background:linear-gradient(135deg,#064e3b,#0e7490);color:#fff;padding:0 1rem 4rem}
nav{display:flex;gap:1.2rem;align-items:center;max-width:1000px;margin:auto;padding:1rem 0}nav a{color:#d1fae5;text-decoration:none}.logo{font-weight:800;font-size:1.3rem;margin-right:auto}
.hero-in{max-width:1000px;margin:2rem auto 0}.hero h1{font-size:clamp(2rem,5vw,3.2rem);margin:.2em 0}
.btn{display:inline-block;background:var(--acc);color:#fff;border:0;padding:.75rem 1.3rem;border-radius:999px;font-weight:700;text-decoration:none;cursor:pointer}
main{max-width:1000px;margin:-2.5rem auto 2rem;padding:0 1rem}.card{background:var(--card);border-radius:18px;padding:1.6rem;margin-bottom:1.5rem;box-shadow:0 10px 30px #0001}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:2rem}@media(max-width:700px){.grid2{grid-template-columns:1fr}nav a{display:none}}
label{display:block;margin:.6rem 0;font-size:.92rem;font-weight:600}input,select{width:100%;padding:.6rem;border:1px solid #cbd5e1;border-radius:10px;font:inherit;margin-top:.2rem}
input[type=range]{padding:0}.tag{background:#fef3c7;color:#92400e;border-radius:6px;padding:0 .4rem;font-weight:500}
.results{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:1rem;margin:1.5rem 0}
.kpi{border-radius:14px;padding:1rem;background:#f8fafc}.kpi b{display:block;font-size:1.5rem}.kpi.gas{border-left:5px solid var(--gas)}.kpi.ev{border-left:5px solid var(--acc2)}.kpi.save{background:#ecfdf5;border-left:5px solid var(--acc)}
canvas{width:100%;height:auto}.fine{font-size:.85rem;color:#475569}.row{display:flex;gap:.6rem;flex-wrap:wrap}.row input{flex:1;min-width:200px;margin:0}
.stlist{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:.8rem;margin-top:1rem}.st{border:1px solid #e2e8f0;border-radius:12px;padding:.8rem;font-size:.9rem}
.placeholder{border:2px dashed #f59e0b;background:#fffbeb;border-radius:14px;padding:1rem;margin-top:1rem}footer{text-align:center;padding:2rem;color:#64748b}