:root{
    --ink:#111a18;
    --green:#1f7a5a;
    --green-2:#2fa66f;
    --soft:#eef5f1;
    --line:#dce6e1;
    --muted:#66736d;
    --white:#fff;
    --danger:#a63d3d;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:#fff}
a{color:inherit;text-decoration:none}
button,input,select{font:inherit}
.container{width:min(1160px,calc(100% - 36px));margin:0 auto}
.narrow{width:min(980px,100%)}
.topbar{position:sticky;top:0;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);z-index:20}
.nav{height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{font-size:23px;font-weight:900;letter-spacing:.08em}
nav{display:flex;gap:24px;color:#42504b;font-size:14px}
.hero{padding:76px 0 60px;background:linear-gradient(180deg,#f7faf8 0%,#fff 100%)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:54px;align-items:center}
.eyebrow{display:inline-block;font-size:12px;font-weight:800;letter-spacing:.12em;color:var(--green);margin-bottom:12px}
h1{font-size:clamp(42px,6vw,72px);line-height:.98;letter-spacing:-.05em;margin:0 0 20px}
h2{font-size:clamp(28px,3.5vw,44px);letter-spacing:-.035em;line-height:1.05;margin:0 0 14px}
h3{font-size:20px;margin:0 0 10px}
p{color:#53605b;line-height:1.7}
.lead{font-size:19px;max-width:760px}
.hero p{font-size:19px;max-width:690px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:14px 20px;border-radius:12px;font-weight:750}
.btn.primary{background:var(--ink);color:#fff}
.btn.ghost{border:1px solid var(--line);background:#fff}
.ai-card{background:var(--ink);color:#fff;padding:30px;border-radius:24px;box-shadow:0 20px 60px rgba(17,26,24,.12)}
.ai-card h2{font-size:30px}
.ai-card p{color:#bdc9c4;font-size:14px}
.ai-badge{font-size:11px;letter-spacing:.12em;color:#8ce3b8;font-weight:800}
.fake-input{margin-top:24px;padding:17px 18px;border:1px solid #37443f;background:#18231f;border-radius:13px;color:#b9c6c0}
.section{padding:72px 0}
.soft{background:var(--soft)}
.section-head,.split,.status-box,.footer-grid{display:flex;align-items:flex-end;justify-content:space-between;gap:40px}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:28px}
.tool-card{position:relative;border:1px solid var(--line);border-radius:18px;padding:24px;min-height:220px;transition:.2s;background:#fff}
.tool-card:hover{transform:translateY(-3px);box-shadow:0 16px 40px rgba(17,26,24,.08);border-color:#b8cec4}
.tool-card p{font-size:14px}
.tool-card strong{display:inline-block;margin-top:12px;font-size:13px;color:var(--green)}
.tool-icon{display:flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:12px;background:var(--soft);color:var(--green);font-weight:900;margin-bottom:30px}
.status-box{align-items:center;border:1px solid var(--line);padding:26px;border-radius:18px}
.status{display:flex;align-items:center;gap:9px;font-size:14px;font-weight:750}
.status span{width:10px;height:10px;border-radius:50%;background:#d3a23d}
.status.ok span{background:var(--green-2)}
.notice{padding:14px 16px;background:#fff5db;border:1px solid #efd999;border-radius:12px;margin:20px 0}
.calculator-placeholder{padding:28px;border:1px solid var(--line);border-radius:18px;background:var(--soft);margin:32px 0}
.calculator-placeholder span{font-size:12px;font-weight:900;color:var(--green)}
.method{border-top:1px solid var(--line);margin-top:30px;padding-top:24px}
footer{border-top:1px solid var(--line);padding:44px 0}
.fine{max-width:620px;font-size:12px}

/* S1 - CALCULADORA */
.back-link{display:inline-block;margin-bottom:28px;color:var(--muted);font-size:14px}
.tool-title{font-size:clamp(42px,6vw,64px)}
.calculator-shell{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(320px,.85fr);gap:22px;align-items:start;margin-top:38px}
.calculator-form{border:1px solid var(--line);border-radius:22px;padding:28px;background:#fff}
.form-section+.form-section{border-top:1px solid var(--line);margin-top:26px;padding-top:26px}
.form-section-title{display:flex;gap:14px;align-items:flex-start;margin-bottom:20px}
.form-section-title>span{width:30px;height:30px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:var(--ink);color:#fff;font-size:12px;font-weight:900;flex:0 0 auto}
.form-section-title strong{display:block;font-size:17px}
.form-section-title small{display:block;color:var(--muted);margin-top:4px;line-height:1.45}
.segmented{display:grid;grid-template-columns:1fr 1fr;gap:8px;background:var(--soft);padding:5px;border-radius:13px;margin-bottom:18px}
.segmented input{position:absolute;opacity:0;pointer-events:none}
.segmented span{display:block;padding:11px 12px;text-align:center;border-radius:9px;font-size:13px;font-weight:750;cursor:pointer}
.segmented input:checked+span{background:#fff;box-shadow:0 2px 8px rgba(17,26,24,.08)}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field{display:block}
.field>span{display:block;font-size:13px;font-weight:750;margin-bottom:7px}
.field b{color:var(--muted);font-size:11px;font-weight:650}
.field input,.field select{width:100%;padding:13px 14px;border:1px solid #cfdad5;border-radius:11px;background:#fff;outline:none;color:var(--ink)}
.field input:focus,.field select:focus{border-color:var(--green);box-shadow:0 0 0 3px rgba(31,122,90,.09)}
.calculate-btn{width:100%;border:0;border-radius:12px;background:var(--ink);color:#fff;padding:15px 18px;margin-top:26px;font-weight:850;cursor:pointer}
.calculate-btn:hover{background:#1c2925}
.form-note{font-size:11px;text-align:center;margin:10px 0 0}
.form-alert{padding:14px 16px;border:1px solid #efc2c2;background:#fff1f1;color:#7d2929;border-radius:12px;margin:22px 0}
.result-panel{position:sticky;top:94px;padding:28px;border-radius:22px;background:var(--ink);color:#fff;min-height:310px}
.result-panel p{color:#b7c5bf}
.result-panel h2{font-size:30px;margin-top:12px}
.result-kicker{font-size:11px;font-weight:900;letter-spacing:.12em;color:#82dfb0}
.result-main{padding:22px 0 15px}
.result-main strong{display:block;font-size:54px;letter-spacing:-.05em;line-height:1;color:#fff}
.result-main span{color:#b7c5bf}
.result-package{display:flex;justify-content:space-between;gap:10px;padding:15px 0;border-top:1px solid #34413c;border-bottom:1px solid #34413c}
.result-package span{color:#9fb0a9}
.result-grid{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:#34413c;margin-top:18px;border:1px solid #34413c;border-radius:12px;overflow:hidden}
.result-grid div{background:#17221e;padding:13px}
.result-grid span{display:block;color:#93a59e;font-size:11px;margin-bottom:4px}
.result-grid strong{font-size:14px}
.result-explain{margin-top:18px}
.result-explain strong{font-size:13px}
.result-explain p{font-size:12px;margin-bottom:0}
.save-disabled{width:100%;margin-top:18px;padding:12px;border-radius:10px;border:1px solid #3b4a44;background:transparent;color:#7f918a}
.method-card{margin-top:48px;padding-top:38px}
.method-card h2{font-size:32px}

@media(max-width:800px){
    nav{display:none}
    .hero{padding-top:48px}
    .hero-grid,.cards,.calculator-shell{grid-template-columns:1fr}
    .section-head,.split,.status-box,.footer-grid{align-items:flex-start;flex-direction:column}
    h1{font-size:46px}
    .result-panel{position:static}
}
@media(max-width:520px){
    .grid-2,.segmented{grid-template-columns:1fr}
    .calculator-form,.result-panel{padding:20px}
}