:root{
  --ink:#101828;
  --muted:#667085;
  --line:#e4e7ec;
  --soft:#f8fafc;
  --white:#fff;
  --radius:18px;
}
*{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;
  line-height:1.6;
}
a{color:inherit}
.wrap{width:min(1120px,calc(100% - 32px));margin-inline:auto}
.narrow{width:min(780px,calc(100% - 32px))}
.site-header{
  position:sticky;top:0;z-index:20;
  border-bottom:1px solid var(--line);
  background:rgba(255,255,255,.94);
  backdrop-filter:blur(10px);
}
.nav{min-height:66px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{font-weight:800;text-decoration:none}
nav{display:flex;gap:18px}
nav a{font-size:14px;text-decoration:none;color:var(--muted)}
.hero{padding:72px 0 28px;text-align:center}
.eyebrow{margin:0 0 8px;font-size:12px;font-weight:800;letter-spacing:.14em;color:var(--muted)}
h1{margin:0;font-size:clamp(42px,7vw,72px);line-height:1.02;letter-spacing:-.04em}
.lede{max-width:700px;margin:18px auto 0;color:var(--muted);font-size:clamp(18px,2vw,22px)}
.calculator-card{
  margin:18px auto 0;
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:26px;
  box-shadow:0 18px 50px rgba(16,24,40,.08);
}
.settings-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:20px}
label>span{display:block;font-size:14px;font-weight:700;margin-bottom:6px}
label small{font-weight:500;color:var(--muted)}
.input-prefix,.input-suffix{
  display:flex;align-items:center;border:1px solid var(--line);
  border-radius:10px;overflow:hidden;background:#fff
}
.input-prefix b,.input-suffix b{padding:0 10px;color:var(--muted);font-size:14px;white-space:nowrap}
input{
  width:100%;border:0;outline:0;background:#fff;color:var(--ink);
  font:inherit;padding:11px 12px
}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:12px}
table{border-collapse:collapse;width:100%;min-width:700px}
th,td{padding:12px;border-bottom:1px solid var(--line);text-align:left}
thead th{background:var(--soft);font-size:12px;letter-spacing:.05em;text-transform:uppercase}
tbody tr:last-child th,tbody tr:last-child td{border-bottom:0}
td input[type=time]{border:1px solid var(--line);border-radius:9px}
.break-wrap{display:flex;align-items:center;border:1px solid var(--line);border-radius:9px;overflow:hidden}
.break-wrap span{padding:0 9px;color:var(--muted);font-size:13px}
.day-total{font-weight:800;font-variant-numeric:tabular-nums}
.results{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:18px}
.results>div{padding:16px;border-radius:12px;background:var(--soft)}
.results span,.results small{display:block;color:var(--muted)}
.results span{font-size:13px}
.results strong{display:block;font-size:27px;line-height:1.2;margin-top:4px;font-variant-numeric:tabular-nums}
.results small{font-size:12px;margin-top:4px}
.reset{margin-top:18px;border:1px solid var(--line);background:#fff;border-radius:9px;padding:10px 14px;font-weight:700;cursor:pointer}
.disclaimer{margin:14px 0 0;font-size:12px;color:var(--muted)}
.ad-placeholder{
  min-height:110px;margin-top:34px;margin-bottom:34px;
  border:1px dashed #cbd5e1;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  color:#98a2b3;font-size:11px;letter-spacing:.12em
}
.content{padding:22px 0}
.content h2{font-size:30px;line-height:1.15;margin:32px 0 10px;letter-spacing:-.02em}
.content p{color:#475467}
details{border-top:1px solid var(--line);padding:16px 0}
details:last-child{border-bottom:1px solid var(--line)}
summary{cursor:pointer;font-weight:700}
details p{margin-bottom:0}
footer{margin-top:60px;border-top:1px solid var(--line);padding:24px 0;color:var(--muted);font-size:13px}
@media(max-width:760px){
  nav{display:none}
  .hero{padding-top:48px}
  .calculator-card{padding:16px}
  .settings-grid,.results{grid-template-columns:1fr}
}