:root{
  --bg:#0f1210; --bg-2:#151a14; --panel:#1a211a; --panel-2:#212a20;
  --line:#2e3a2c; --line-2:#3d4c3a;
  --ink:#eef2ea; --ink-2:#b3c0ac; --ink-3:#7d8c78;
  --gold:#c6a35b; --gold-2:#e0bf7d;
  --od:#4f6b3a; --od-2:#6b8c4f;
  --pass:#5fa84f; --pass-bg:#1b2b18;
  --fail:#c0563f; --fail-bg:#2b1915;
  --warn:#c89a3c;
  --r:14px; --r-sm:9px;
  --max:1120px;
  --sans:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  --cond:'Barlow Condensed',var(--sans);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background:var(--bg); color:var(--ink); font-family:var(--sans);
  font-size:16.5px; line-height:1.72; -webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(900px 500px at 50% -180px, rgba(79,107,58,.26), transparent 70%),
    repeating-linear-gradient(0deg, rgba(255,255,255,.012) 0 1px, transparent 1px 3px);
}
.wrap{max-width:var(--max);margin:0 auto;padding:0 18px}
.narrow{max-width:820px}
img{max-width:100%;height:auto}

/* header */
header.site{position:sticky;top:0;z-index:60;background:rgba(15,18,16,.93);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.navbar{display:flex;align-items:center;justify-content:space-between;gap:14px;height:62px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);
  font-family:var(--cond);font-weight:700;font-size:1.22rem;letter-spacing:.055em;
  text-transform:uppercase;white-space:nowrap;border:0}
.brand img.mark{height:42px;width:auto;flex:none;display:block;background:none;box-shadow:none}
@media(max-width:420px){.brand{font-size:1.02rem;gap:8px}.brand img.mark{height:34px}}
.flogo{max-width:270px;width:100%;height:auto;margin-bottom:12px}
.nav{display:flex;gap:4px;align-items:center}
.nav a{color:var(--ink-2);text-decoration:none;font-size:.9rem;font-weight:500;
  padding:7px 11px;border-radius:7px;transition:.15s;border:0}
.nav a:hover{color:var(--ink);background:var(--panel-2)}
.nav a.on{color:var(--gold-2)}
.nav-btn{display:none;background:none;border:1px solid var(--line-2);color:var(--ink);
  border-radius:8px;padding:7px 11px;font-size:1.1rem;cursor:pointer}
@media(max-width:900px){
  .nav{position:absolute;top:62px;left:0;right:0;background:var(--bg-2);
    border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;
    padding:8px;gap:2px;display:none}
  .nav.open{display:flex}
  .nav a{padding:11px 13px}
  .nav-btn{display:block}
}

/* breadcrumb */
.crumb{font-size:.82rem;color:var(--ink-3);padding:16px 0 0}
.crumb a{color:var(--ink-3);border:0}
.crumb a:hover{color:var(--gold-2)}

/* hero */
.hero{padding:34px 0 24px;text-align:center}
.hero.left{text-align:left}
.flag{display:inline-flex;align-items:center;gap:9px;background:var(--panel);
  border:1px solid var(--line-2);padding:6px 14px;border-radius:999px;font-size:.78rem;
  font-weight:600;letter-spacing:.09em;text-transform:uppercase;color:var(--gold-2);margin-bottom:17px}
.flag .dot{width:7px;height:7px;border-radius:50%;background:var(--pass);
  box-shadow:0 0 0 3px rgba(95,168,79,.22)}
h1{font-family:var(--cond);font-weight:700;letter-spacing:.012em;
  font-size:clamp(2rem,5.8vw,3.3rem);line-height:1.08;text-transform:uppercase}
h1 .hl{color:var(--gold-2)}
.sub{color:var(--ink-2);font-size:1.07rem;max-width:720px;margin:16px auto 0}
.hero.left .sub{margin-left:0}
.stamp{margin-top:15px;font-size:.81rem;color:var(--ink-3);letter-spacing:.04em}
.trust{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:20px}
.hero.left .trust{justify-content:flex-start}
.trust span{font-size:.79rem;color:var(--ink-2);background:var(--panel);
  border:1px solid var(--line);padding:5px 12px;border-radius:999px}

/* calculator shell */
.calc{background:linear-gradient(180deg,var(--panel),var(--bg-2));border:1px solid var(--line-2);
  border-radius:var(--r);margin:26px 0 10px;overflow:hidden;
  box-shadow:0 22px 60px -32px rgba(0,0,0,.95)}
.calc-head{padding:16px 20px;border-bottom:1px solid var(--line);display:flex;flex-wrap:wrap;
  gap:12px;align-items:center;justify-content:space-between;background:rgba(0,0,0,.18)}
.calc-head h2{font-family:var(--cond);font-size:1.3rem;text-transform:uppercase;
  letter-spacing:.05em;font-weight:600}
.units{display:flex;border:1px solid var(--line-2);border-radius:8px;overflow:hidden}
.units button{background:transparent;border:0;color:var(--ink-2);padding:6px 15px;font:inherit;
  font-size:.83rem;font-weight:600;cursor:pointer;transition:.15s}
.units button[aria-pressed="true"]{background:var(--od);color:#fff}
.modes{display:grid;grid-template-columns:1fr 1fr;border-bottom:1px solid var(--line)}
.modes button{background:transparent;border:0;border-bottom:3px solid transparent;padding:15px 12px;
  cursor:pointer;color:var(--ink-3);font:inherit;text-align:center;transition:.18s}
.modes button .t{display:block;font-family:var(--cond);font-size:1.07rem;font-weight:600;
  text-transform:uppercase;letter-spacing:.05em;color:inherit}
.modes button .d{display:block;font-size:.76rem;margin-top:1px;opacity:.8}
.modes button[aria-selected="true"]{color:var(--ink);border-bottom-color:var(--gold);
  background:rgba(198,163,91,.07)}
.modes button:hover{color:var(--ink-2)}
.calc-body{padding:22px 20px 24px}
.fields{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:15px}
.field label{display:block;font-size:.8rem;font-weight:600;letter-spacing:.055em;
  text-transform:uppercase;color:var(--ink-2);margin-bottom:6px}
.inp{width:100%;background:#0c0f0b;border:1px solid var(--line-2);color:var(--ink);
  border-radius:var(--r-sm);padding:12px 13px;font:inherit;font-size:1.05rem;font-weight:600;
  transition:.15s;appearance:none}
.inp:focus{outline:0;border-color:var(--gold);box-shadow:0 0 0 3px rgba(198,163,91,.16)}
select.inp{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%23b3c0ac' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 13px center;padding-right:34px}
.hint{font-size:.78rem;color:var(--ink-3);margin-top:6px;line-height:1.5}
.ht-pair{display:grid;grid-template-columns:1fr 1fr;gap:9px}
.seg{display:flex;gap:7px;flex-wrap:wrap}
.seg label{flex:1;min-width:88px;margin:0;cursor:pointer;text-align:center;
  border:1px solid var(--line-2);border-radius:var(--r-sm);padding:11px 8px;font-size:.92rem;
  font-weight:600;color:var(--ink-2);background:#0c0f0b;transition:.15s;
  text-transform:none;letter-spacing:0}
.seg input{position:absolute;opacity:0;width:0;height:0}
.seg label:has(input:checked){background:var(--od);border-color:var(--od-2);color:#fff}
.actions{display:flex;gap:10px;margin-top:20px;flex-wrap:wrap}
.btn{font-family:var(--cond);font-size:1.08rem;font-weight:700;letter-spacing:.08em;
  text-transform:uppercase;border:0;border-radius:var(--r-sm);padding:14px 30px;cursor:pointer;
  transition:.16s;text-decoration:none;display:inline-block;text-align:center}
.btn-main{background:linear-gradient(160deg,var(--gold-2),var(--gold));color:#1b1403;flex:1;min-width:190px}
.btn-main:hover{filter:brightness(1.08)}
.btn-ghost{background:transparent;border:1px solid var(--line-2);color:var(--ink-2)}
.btn-ghost:hover{border-color:var(--ink-3);color:var(--ink)}

/* result */
.result{display:none;margin-top:22px;border-radius:var(--r);overflow:hidden;border:1px solid var(--line-2)}
.result.show{display:block;animation:rise .35s ease}
@keyframes rise{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.verdict{padding:22px 20px;text-align:center;border-bottom:1px solid var(--line)}
.verdict.pass{background:var(--pass-bg)}
.verdict.fail{background:var(--fail-bg)}
.verdict.warn{background:#2a2412}
.verdict .tag{font-family:var(--cond);font-size:clamp(1.9rem,5.5vw,2.7rem);font-weight:700;
  text-transform:uppercase;letter-spacing:.08em;line-height:1.05}
.verdict.pass .tag{color:#86d274}
.verdict.fail .tag{color:#e58a70}
.verdict.warn .tag{color:var(--gold-2)}
.verdict .line{color:var(--ink-2);font-size:.97rem;margin-top:7px}
.big{font-family:var(--cond);font-size:clamp(2.6rem,9vw,4rem);font-weight:700;line-height:1;
  letter-spacing:.01em;margin-bottom:4px}
.metrics{display:grid;grid-template-columns:repeat(auto-fit,minmax(135px,1fr));
  background:var(--panel-2);gap:1px}
.metric{background:var(--bg-2);padding:15px 14px;text-align:center}
.metric .k{font-size:.72rem;letter-spacing:.09em;text-transform:uppercase;color:var(--ink-3);
  display:block;margin-bottom:5px}
.metric .v{font-family:var(--cond);font-size:1.52rem;font-weight:700;color:var(--ink);line-height:1.1}
.metric .v.g{color:#86d274}.metric .v.r{color:#e58a70}.metric .v.y{color:var(--gold-2)}
.gauge{padding:18px 20px;background:var(--bg-2);border-top:1px solid var(--line)}
.gauge .bar{height:11px;border-radius:999px;
  background:linear-gradient(90deg,#3f7a33 0%,#5fa84f 52%,#c89a3c 62%,#c0563f 100%);
  position:relative;overflow:visible}
.gauge .pin{position:absolute;top:-6px;width:3px;height:23px;background:#fff;border-radius:2px;
  box-shadow:0 0 0 2px rgba(0,0,0,.65);transition:left .5s cubic-bezier(.3,1.2,.4,1)}
.gauge .ends{display:flex;justify-content:space-between;font-size:.72rem;color:var(--ink-3);margin-top:9px}
.notes{padding:16px 20px;background:var(--panel);border-top:1px solid var(--line);
  font-size:.9rem;color:var(--ink-2)}
.notes strong{color:var(--ink)}
.notes ul{margin:8px 0 0 19px}
.notes li{margin:5px 0}
.bf-step{display:none;margin-top:18px;padding:18px;border:1px dashed var(--line-2);
  border-radius:var(--r-sm);background:rgba(200,154,60,.05)}
.bf-step.show{display:block}
.bf-step h3{font-family:var(--cond);font-size:1.15rem;text-transform:uppercase;
  letter-spacing:.05em;margin:0 0 5px}

/* sections */
section{padding:40px 0 6px}
h2.sec{font-family:var(--cond);font-size:clamp(1.55rem,4.2vw,2.1rem);text-transform:uppercase;
  letter-spacing:.035em;font-weight:700;margin-bottom:8px;scroll-margin-top:76px}
h2.sec .n{color:var(--gold);font-size:.72em;margin-right:9px;font-weight:600}
h3{font-family:var(--cond);font-size:1.3rem;text-transform:uppercase;letter-spacing:.04em;
  margin:26px 0 9px;color:var(--ink);scroll-margin-top:76px}
h4{font-family:var(--cond);font-size:1.1rem;text-transform:uppercase;letter-spacing:.04em;margin:20px 0 6px}
p{margin:13px 0;color:var(--ink-2)}
p strong,li strong,td strong{color:var(--ink);font-weight:600}
a{color:var(--gold-2);text-decoration:none;border-bottom:1px solid rgba(224,191,125,.32)}
a:hover{border-bottom-color:var(--gold-2)}
ul.body,ol.body{margin:13px 0 13px 21px;color:var(--ink-2)}
ul.body li,ol.body li{margin:8px 0}
.lede{font-size:1.06rem;color:var(--ink-2);border-left:3px solid var(--od-2);
  padding-left:16px;margin:16px 0}
.callout{background:var(--panel);border:1px solid var(--line-2);border-left:4px solid var(--gold);
  border-radius:var(--r-sm);padding:16px 18px;margin:20px 0}
.callout.green{border-left-color:var(--pass)}
.callout.red{border-left-color:var(--fail)}
.callout h4{font-family:var(--cond);font-size:1.08rem;text-transform:uppercase;
  letter-spacing:.05em;margin:0 0 4px}
.callout p{margin:5px 0 0}

/* tables */
.t-wrap{overflow-x:auto;margin:18px 0;border:1px solid var(--line);border-radius:var(--r-sm);
  -webkit-overflow-scrolling:touch}
table{width:100%;border-collapse:collapse;font-size:.9rem;min-width:520px}
caption{text-align:left;padding:13px 15px;font-size:.84rem;color:var(--ink-3);
  background:var(--panel);border-bottom:1px solid var(--line)}
th,td{padding:10px 13px;text-align:left;border-bottom:1px solid var(--line)}
thead th{background:var(--panel-2);font-family:var(--cond);font-size:.93rem;letter-spacing:.05em;
  text-transform:uppercase;color:var(--ink);font-weight:600;position:sticky;top:0}
tbody tr:nth-child(even){background:rgba(255,255,255,.017)}
tbody tr:hover{background:rgba(198,163,91,.055)}
td.num{font-variant-numeric:tabular-nums;font-weight:600;color:var(--ink)}
.t-wrap.tall{max-height:460px;overflow-y:auto}
.tabs{display:flex;gap:6px;margin:18px 0 0;flex-wrap:wrap}
.tabs button{background:var(--panel);border:1px solid var(--line-2);color:var(--ink-2);
  border-radius:999px;padding:7px 17px;font:inherit;font-size:.86rem;font-weight:600;
  cursor:pointer;transition:.15s}
.tabs button[aria-pressed="true"]{background:var(--od);border-color:var(--od-2);color:#fff}

/* cards */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(255px,1fr));gap:15px;margin:20px 0}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r-sm);padding:18px}
.card .ic{font-size:1.4rem;margin-bottom:8px;display:block}
.card h4{font-family:var(--cond);font-size:1.12rem;text-transform:uppercase;
  letter-spacing:.04em;margin:0 0 6px}
.card p{font-size:.92rem;margin:0;color:var(--ink-2)}
a.card{display:block;border-bottom:1px solid var(--line);color:inherit;transition:.15s}
a.card:hover{border-color:var(--line-2);background:var(--panel-2);transform:translateY(-2px)}
a.card h4{color:var(--gold-2)}

ol.steps{list-style:none;margin:20px 0;counter-reset:s}
ol.steps li{counter-increment:s;position:relative;padding:14px 0 14px 54px;
  border-bottom:1px solid var(--line);color:var(--ink-2);font-size:.96rem}
ol.steps li:last-child{border-bottom:0}
ol.steps li::before{content:counter(s,decimal-leading-zero);position:absolute;left:0;top:13px;
  font-family:var(--cond);font-size:1.12rem;font-weight:700;color:var(--gold);
  background:var(--panel);border:1px solid var(--line-2);border-radius:7px;
  width:36px;height:30px;display:grid;place-items:center}
ol.steps li b{color:var(--ink);display:block;margin-bottom:1px}

details{border:1px solid var(--line);border-radius:var(--r-sm);background:var(--panel);
  margin:9px 0;overflow:hidden}
details[open]{border-color:var(--line-2)}
summary{padding:15px 44px 15px 17px;cursor:pointer;list-style:none;position:relative;
  font-weight:600;color:var(--ink);font-size:.98rem}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";position:absolute;right:17px;top:50%;transform:translateY(-50%);
  color:var(--gold);font-size:1.3rem;font-weight:400;line-height:1}
details[open] summary::after{content:"\2212"}
details .ans{padding:0 17px 16px;color:var(--ink-2);font-size:.94rem}
details .ans p{margin:0 0 9px}
details .ans p:last-child{margin-bottom:0}

.ad{margin:30px 0;min-height:100px;border:1px dashed var(--line-2);border-radius:var(--r-sm);
  display:grid;place-items:center;color:var(--ink-3);font-size:.74rem;letter-spacing:.14em;
  text-transform:uppercase;background:rgba(255,255,255,.012)}
.src{background:var(--panel);border:1px solid var(--line);border-radius:var(--r-sm);
  padding:18px 20px;margin:22px 0}
.src h4{font-family:var(--cond);text-transform:uppercase;letter-spacing:.05em;
  font-size:1.05rem;margin:0 0 9px}
.src ol{margin-left:19px;font-size:.89rem;color:var(--ink-2)}
.src li{margin:6px 0}

/* footer */
footer{border-top:1px solid var(--line);margin-top:48px;padding:34px 0 26px;background:var(--bg-2)}
.fgrid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:26px}
@media(max-width:760px){.fgrid{grid-template-columns:1fr 1fr}}
@media(max-width:460px){.fgrid{grid-template-columns:1fr}}
.fgrid h5{font-family:var(--cond);text-transform:uppercase;letter-spacing:.07em;
  font-size:.93rem;color:var(--ink);margin-bottom:10px}
.fgrid ul{list-style:none}
.fgrid li{margin:6px 0}
.fgrid a{color:var(--ink-2);font-size:.88rem;border:0}
.fgrid a:hover{color:var(--gold-2)}
.fgrid p{font-size:.87rem;margin:9px 0 0}
.legal{margin-top:26px;padding-top:18px;border-top:1px solid var(--line);
  font-size:.79rem;color:var(--ink-3);line-height:1.65}

.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}
@media print{
  header.site,.ad,footer,.actions,.modes,.nav{display:none!important}
  body{background:#fff;color:#000}
  .result{border:1px solid #000}
}