:root{
  --navy:#0b2a4a;
  --blue:#1662c4;
  --teal:#0ea5a3;
  --ink:#152233;
  --muted:#5b6b7c;
  --line:#e3e9f0;
  --bg:#f6f9fc;
  --card:#ffffff;
  --radius:14px;
  --danger:#c0392b;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  font-family:'Inter',-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  background:var(--bg);
  color:var(--ink);
  line-height:1.55;
}
a{color:inherit;text-decoration:none;}

header{
  position:sticky; top:0; z-index:50;
  background:rgba(255,255,255,0.9);
  backdrop-filter:saturate(180%) blur(8px);
  border-bottom:1px solid var(--line);
}
.nav{
  max-width:1120px;margin:0 auto;padding:16px 24px;
  display:flex;align-items:center;justify-content:space-between;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;color:var(--navy);}
.brand .mark{
  width:34px;height:34px;border-radius:9px;
  background:linear-gradient(135deg,var(--blue),var(--teal));
  display:flex;align-items:center;justify-content:center;
  color:#fff;font-size:16px;font-weight:800;
}
.nav-links{display:flex;gap:28px;font-size:14px;font-weight:500;color:var(--muted);}
.nav-links a:hover{color:var(--blue);}
.nav-cta{
  background:var(--navy);color:#fff;padding:9px 18px;border-radius:8px;
  font-size:14px;font-weight:600;
}

.hero{
  max-width:1120px;margin:0 auto;padding:88px 24px 64px;
  text-align:center;
}
.pill{
  display:inline-flex;align-items:center;gap:8px;
  background:#e7f2fb;color:var(--blue);
  font-size:13px;font-weight:600;
  padding:6px 14px;border-radius:999px;margin-bottom:22px;
}
.pill .dot{width:7px;height:7px;border-radius:50%;background:var(--teal);}
h1{
  font-size:clamp(32px,5vw,52px);
  line-height:1.12;
  margin:0 0 18px;
  color:var(--navy);
  font-weight:800;
  letter-spacing:-0.02em;
}
h1 span{color:var(--teal);}
.lede{
  max-width:640px;margin:0 auto 34px;
  font-size:18px;color:var(--muted);
}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;}
.btn{
  padding:13px 26px;border-radius:9px;font-weight:600;font-size:15px;
  display:inline-block;border:none;cursor:pointer;font-family:inherit;
}
.btn-primary{background:var(--blue);color:#fff;}
.btn-primary:hover{background:#124f9e;}
.btn-ghost{background:#fff;color:var(--navy);border:1px solid var(--line);}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue);}

.stats{
  max-width:1120px;margin:0 auto;padding:0 24px 72px;
  display:grid;grid-template-columns:repeat(3,1fr);gap:20px;
}
.stat{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;text-align:center;
}
.stat b{display:block;font-size:26px;color:var(--navy);}
.stat span{font-size:13px;color:var(--muted);}

section.tools{max-width:1120px;margin:0 auto;padding:0 24px 100px;}
.section-head{text-align:center;max-width:600px;margin:0 auto 40px;}
.section-head h2{font-size:30px;color:var(--navy);margin:0 0 12px;font-weight:800;}
.section-head p{color:var(--muted);margin:0;font-size:16px;}

.grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:20px;
}
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 24px;position:relative;overflow:hidden;
  transition:transform .15s ease, box-shadow .15s ease;
  display:block;
}
.card:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(11,42,74,0.08);}
.card .icon{
  width:44px;height:44px;border-radius:10px;
  background:#eef6fd;color:var(--blue);
  display:flex;align-items:center;justify-content:center;
  font-size:20px;margin-bottom:16px;
}
.card h3{margin:0 0 8px;font-size:17px;color:var(--ink);font-weight:700;}
.card p{margin:0 0 14px;font-size:14px;color:var(--muted);}
.badge{
  display:inline-block;font-size:11px;font-weight:700;letter-spacing:.03em;
  text-transform:uppercase;color:var(--teal);background:#e6f8f7;
  padding:4px 10px;border-radius:999px;
}
.badge.soon{color:#a1650b;background:#fdf0e0;}

.cta-band{
  max-width:1120px;margin:0 auto 100px;padding:48px;
  background:linear-gradient(135deg,var(--navy),#123b63);
  border-radius:20px;color:#fff;text-align:center;
}
.cta-band h2{margin:0 0 12px;font-size:26px;font-weight:800;}
.cta-band p{margin:0 0 26px;color:#c7d7e8;font-size:15px;}
.cta-band .btn-primary{background:var(--teal);}
.cta-band .btn-primary:hover{background:#0c8f8d;}

footer{
  border-top:1px solid var(--line);padding:36px 24px;
}
.foot-inner{
  max-width:1120px;margin:0 auto;display:flex;justify-content:space-between;
  align-items:center;flex-wrap:wrap;gap:12px;
  font-size:13px;color:var(--muted);
}
.disclaimer{
  max-width:1120px;margin:0 auto 40px;padding:0 24px;
  font-size:12.5px;color:var(--muted);
  border-top:1px solid var(--line);padding-top:20px;
}

/* ---- Tool page layout ---- */
.breadcrumb{
  max-width:880px;margin:28px auto 0;padding:0 24px;
  font-size:13px;color:var(--muted);
}
.breadcrumb a:hover{color:var(--blue);}

.tool-wrap{
  max-width:880px;margin:0 auto;padding:20px 24px 90px;
}
.tool-head{margin-bottom:28px;}
.tool-head h1{font-size:32px;margin:0 0 10px;text-align:left;}
.tool-head p{color:var(--muted);font-size:15.5px;margin:0;max-width:640px;}

.tool-panel{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:32px;display:grid;grid-template-columns:1fr 1fr;gap:32px;
}
@media (max-width:720px){
  .tool-panel{grid-template-columns:1fr;}
}

.field{margin-bottom:18px;}
.field label{
  display:block;font-size:13px;font-weight:600;color:var(--ink);margin-bottom:6px;
}
.field .hint{font-size:12px;color:var(--muted);margin-top:5px;}
.input-row{display:flex;gap:8px;}
input[type="number"], select{
  width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:8px;
  font-size:15px;font-family:inherit;color:var(--ink);background:#fff;
}
input[type="number"]:focus, select:focus{outline:2px solid var(--blue);outline-offset:1px;}
select{cursor:pointer;}
.unit-select{width:110px;flex-shrink:0;}

.seg{
  display:flex;border:1px solid var(--line);border-radius:8px;overflow:hidden;
}
.seg button{
  flex:1;padding:10px;background:#fff;border:none;font-family:inherit;
  font-size:14px;font-weight:600;color:var(--muted);cursor:pointer;
}
.seg button.active{background:var(--blue);color:#fff;}

.result-box{
  background:linear-gradient(135deg,#0b2a4a,#123b63);
  border-radius:12px;padding:26px;color:#fff;
}
.result-box .label{font-size:12px;text-transform:uppercase;letter-spacing:.04em;color:#9fc0e2;font-weight:700;}
.result-box .value{font-size:38px;font-weight:800;margin:8px 0 6px;}
.result-box .unit{font-size:14px;color:#c7d7e8;}
.result-box .interp{
  margin-top:16px;padding-top:16px;border-top:1px solid rgba(255,255,255,0.15);
  font-size:13.5px;color:#dce8f4;
}
.result-box .interp b{color:#fff;}

.result-list{margin-top:14px;}
.result-list .row{
  display:flex;justify-content:space-between;padding:10px 0;
  border-bottom:1px solid rgba(255,255,255,0.12);font-size:14px;
}
.result-list .row:last-child{border-bottom:none;}
.result-list .row b{font-size:16px;}

.calc-actions{margin-top:6px;}

.score-list{display:flex;flex-direction:column;gap:10px;margin-top:6px;}
.score-row{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:12px 14px;border:1px solid var(--line);border-radius:9px;font-size:14px;
}
.score-row select{width:90px;}

.small-note{font-size:12px;color:var(--muted);margin-top:22px;line-height:1.6;}

.tool-grid-related{
  max-width:880px;margin:40px auto 0;padding:0 24px;
}
.tool-grid-related h3{font-size:16px;color:var(--navy);margin-bottom:14px;}
.related-links{display:flex;gap:12px;flex-wrap:wrap;}
.related-links a{
  font-size:13.5px;font-weight:600;color:var(--blue);
  background:#eef6fd;padding:8px 14px;border-radius:8px;
}
.related-links a:hover{background:#dcedfb;}