:root{
  --green:#0b6b3a;
  --green-dark:#07502b;
  --green-soft:#e8f4ed;
  --ink:#18222b;
  --muted:#5a6772;
  --line:#dfe5e9;
  --bg:#f6f8f7;
  --card:#ffffff;
  --warn:#fff7e0;
  --warn-line:#f0d98a;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.65;
  font-size:16px;
}
a{color:var(--green)}
a:hover{color:var(--green-dark)}
.wrap{max-width:980px;margin:0 auto;padding:0 16px}

/* header */
.site-header{background:var(--green);color:#fff}
.site-header .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px;padding-top:14px;padding-bottom:14px}
.brand{font-weight:700;font-size:1.2rem;color:#fff;text-decoration:none;letter-spacing:.2px}
.brand span{opacity:.8;font-weight:500}
nav a{color:#fff;text-decoration:none;margin-right:16px;font-size:.95rem;opacity:.92}
nav a:last-child{margin-right:0}
nav a:hover,nav a.active{opacity:1;text-decoration:underline}

/* hero */
.hero{background:linear-gradient(180deg,var(--green) 0,var(--green-dark) 100%);color:#fff;padding:34px 0 70px}
.hero h1{margin:0 0 8px;font-size:clamp(1.6rem,4.5vw,2.4rem);line-height:1.2}
.hero p{margin:0;max-width:640px;opacity:.95}
.badge{display:inline-block;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.3);padding:3px 12px;border-radius:999px;font-size:.82rem;margin-bottom:12px}

/* cards */
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px;margin-bottom:22px;box-shadow:0 1px 3px rgba(0,0,0,.04)}
.pull-up{margin-top:-48px}
h2{font-size:1.4rem;margin:28px 0 10px}
h3{font-size:1.1rem;margin:22px 0 8px}
.page-title{padding:28px 0 4px}
.page-title h1{margin:0 0 6px;font-size:clamp(1.5rem,4vw,2.1rem);line-height:1.25}
.page-title p{margin:0;color:var(--muted)}

/* calculator */
.calc-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:640px){.calc-grid{grid-template-columns:1fr}}
label{display:block;font-weight:600;font-size:.92rem;margin-bottom:6px}
input[type=number],select{
  width:100%;padding:12px 14px;font-size:1.05rem;border:1px solid #c5cdd3;border-radius:10px;background:#fff;color:var(--ink);
}
input:focus,select:focus{outline:2px solid var(--green);border-color:var(--green)}
.hint{font-size:.82rem;color:var(--muted);margin-top:5px}
.results{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px;margin-top:20px}
.stat{background:var(--green-soft);border-radius:12px;padding:14px 16px}
.stat .k{font-size:.8rem;color:var(--muted);text-transform:uppercase;letter-spacing:.4px}
.stat .v{font-size:1.4rem;font-weight:700;color:var(--green-dark);word-break:break-word}
.stat.big{background:var(--green);}
.stat.big .k{color:rgba(255,255,255,.8)}
.stat.big .v{color:#fff}

/* tables */
.table-scroll{overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:.95rem}
th,td{padding:10px 12px;border-bottom:1px solid var(--line);text-align:left;white-space:nowrap}
th{background:#f0f4f2;font-size:.85rem;text-transform:uppercase;letter-spacing:.3px;color:var(--muted)}
td.num,th.num{text-align:right}
tr.hl td{background:var(--green-soft);font-weight:600}

/* notices */
.notice{background:var(--warn);border:1px solid var(--warn-line);border-radius:10px;padding:12px 16px;font-size:.92rem}
.ad-slot{min-height:90px;margin:22px 0;text-align:center;color:#9aa5ad;font-size:.8rem}

ul,ol{padding-left:22px}
li{margin-bottom:6px}

/* footer */
footer{background:#14202a;color:#c8d1d8;margin-top:40px;padding:28px 0;font-size:.9rem}
footer a{color:#e3eaef}
footer .links a{margin-right:16px}
footer p{margin:10px 0 0;color:#98a5af}