:root{
  --bg0:#070a10;
  --bg1:#0c1222;
  --bg2:#101a30;
  --panel:rgba(255,255,255,.06);
  --panel2:rgba(255,255,255,.09);
  --border:rgba(255,255,255,.12);
  --text:#e9eeff;
  --muted:rgba(233,238,255,.72);
  --faint:rgba(233,238,255,.52);
  --accent:#ffb200;
  --accent2:#5ce1ff;
  --good:#45f28b;
  --bad:#ff5474;
  --warn:#ffd166;
  --shadow:0 20px 50px rgba(0,0,0,.55);
  --radius:16px;
  --radius2:22px;
  --max:1120px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background:
    radial-gradient(1200px 800px at 70% -10%, rgba(92,225,255,.14), transparent 60%),
    radial-gradient(900px 700px at 10% 0%, rgba(255,178,0,.14), transparent 55%),
    radial-gradient(900px 700px at 60% 120%, rgba(123,72,255,.12), transparent 55%),
    linear-gradient(180deg, var(--bg0), var(--bg1) 45%, var(--bg0));
  color:var(--text);
  font-family: Georgia, "Times New Roman", serif;
  line-height:1.5;
}

a{color:inherit}
.container{max-width:var(--max);margin:0 auto;padding:0 20px}

.site-header{
  position:sticky;top:0;z-index:20;
  backdrop-filter: blur(10px);
  background: linear-gradient(180deg, rgba(7,10,16,.92), rgba(7,10,16,.65));
  border-bottom:1px solid var(--border);
}
.header__inner{display:flex;align-items:center;justify-content:space-between;padding:14px 0;gap:18px}

.brand{display:flex;align-items:center;gap:12px;text-decoration:none}
.brand__mark{
  width:36px;height:36px;border-radius:12px;
  display:grid;place-items:center;
  background: linear-gradient(135deg, rgba(255,178,0,.25), rgba(92,225,255,.14));
  border:1px solid rgba(255,255,255,.16);
  box-shadow: 0 14px 30px rgba(0,0,0,.35);
  font-family:var(--mono);
}
.brand__text{
  font-size:16px;
  letter-spacing:.02em;
  color:var(--text);
}

.nav{display:flex;gap:10px;align-items:center;flex-wrap:wrap;justify-content:flex-end}
.nav__link{
  text-decoration:none;
  padding:8px 10px;
  border-radius:999px;
  color:var(--muted);
  border:1px solid transparent;
}
.nav__link:hover{border-color:rgba(255,255,255,.16);color:var(--text);background:rgba(255,255,255,.04)}
.nav__link.is-active{
  color:var(--text);
  background:rgba(255,178,0,.12);
  border-color:rgba(255,178,0,.25);
}

main{padding:34px 0 56px}

.hero{
  position:relative;
  border-radius:var(--radius2);
  padding:34px 22px;
  background: linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.03));
  border:1px solid rgba(255,255,255,.12);
  box-shadow:var(--shadow);
  overflow:hidden;
}
.hero::before{
  content:"";
  position:absolute;inset:-2px;
  background:
    radial-gradient(700px 220px at 20% 0%, rgba(255,178,0,.18), transparent 70%),
    radial-gradient(700px 220px at 70% 0%, rgba(92,225,255,.14), transparent 65%),
    radial-gradient(900px 380px at 50% 120%, rgba(255,84,116,.12), transparent 70%);
  opacity:.8;
  pointer-events:none;
}
.hero > *{position:relative}

h1,h2,h3{margin:0 0 10px}
h1{
  font-size:clamp(30px,4.2vw,46px);
  line-height:1.12;
  letter-spacing:.01em;
}
.subtitle{margin:10px 0 0;color:var(--muted);max-width:70ch;font-size:16px}

.section{margin-top:28px}
.section__title{
  font-size:18px;
  letter-spacing:.06em;
  text-transform:uppercase;
  color:rgba(233,238,255,.78);
  margin:0 0 12px;
}

.grid{
  display:grid;
  grid-template-columns: repeat(12, 1fr);
  gap:14px;
}

.card{
  border-radius:var(--radius);
  background: rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.10);
  padding:16px;
  box-shadow: 0 16px 36px rgba(0,0,0,.35);
}
.card--link{position:relative;text-decoration:none;display:block;transition:transform .15s ease, border-color .15s ease}
.card--link:hover{transform: translateY(-2px);border-color:rgba(92,225,255,.20)}
.card__kicker{
  font-family:var(--mono);
  font-size:12px;
  color:rgba(233,238,255,.68);
  letter-spacing:.08em;
  text-transform:uppercase;
}
.card__title{font-size:18px;margin-top:8px}
.card__desc{color:var(--muted);margin-top:10px;font-size:14px;max-width:66ch}

.pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 10px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.14);
  background: rgba(255,255,255,.04);
  color:var(--muted);
  font-family:var(--mono);
  font-size:12px;
}

.tool-layout{
  display:grid;
  grid-template-columns: 1.2fr .9fr;
  gap:14px;
  align-items:start;
}

.panel{
  border-radius:var(--radius);
  background: rgba(255,255,255,.04);
  border:1px solid rgba(255,255,255,.10);
  box-shadow: 0 16px 36px rgba(0,0,0,.35);
  overflow:hidden;
}
.panel__head{
  padding:14px 16px;
  border-bottom:1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.03);
}
.panel__body{padding:16px}

.form{display:grid;gap:12px}
.field{display:grid;gap:6px}
.label{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.06em;
  text-transform:uppercase;
  color:rgba(233,238,255,.70);
}
.control{
  display:flex;gap:10px;align-items:center;
  border-radius:14px;
  border:1px solid rgba(255,255,255,.14);
  background: rgba(7,10,16,.45);
  padding:10px 12px;
}
.control:focus-within{border-color:rgba(92,225,255,.35);box-shadow: 0 0 0 4px rgba(92,225,255,.08)}
input,select,button,textarea{
  font:inherit;
  color:var(--text);
}
input,select,textarea{
  width:100%;
  border:0;
  outline:none;
  background:transparent;
}
select{appearance:none}
.unit{
  font-family:var(--mono);
  color:rgba(233,238,255,.70);
  font-size:12px;
  white-space:nowrap;
}

.hint{color:var(--faint);font-size:13px}
.error{color:rgba(255,84,116,.90);font-size:13px}
.muted{color:var(--muted)}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  text-decoration:none;
  border-radius:999px;
  padding:10px 14px;
  border:1px solid rgba(255,255,255,.16);
  background: rgba(255,255,255,.06);
  color:var(--text);
  cursor:pointer;
}
.btn:hover{border-color:rgba(92,225,255,.25);background:rgba(92,225,255,.08)}
.btn--accent{
  border-color:rgba(255,178,0,.35);
  background: rgba(255,178,0,.12);
}
.btn--accent:hover{background:rgba(255,178,0,.18)}
.btn--ghost{
  background: transparent;
  border-color:rgba(255,255,255,.18);
}

.results{display:grid;gap:10px}
.result{
  border-radius:14px;
  border:1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.03);
  padding:12px 12px;
}
.result__label{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.06em;
  text-transform:uppercase;
  color:rgba(233,238,255,.68);
}
.result__value{
  font-size:22px;
  margin-top:6px;
  line-height:1.1;
}
.result__sub{margin-top:6px;color:var(--muted);font-size:13px}
.delta--up{color:var(--good)}
.delta--down{color:var(--bad)}

.split{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:10px;
}

.accordion{
  border-radius:var(--radius);
  border:1px solid rgba(255,255,255,.10);
  background: rgba(255,255,255,.03);
  overflow:hidden;
}
.accordion__btn{
  width:100%;
  text-align:left;
  border:0;
  background:transparent;
  padding:14px 14px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  cursor:pointer;
  color:var(--text);
}
.accordion__btn:hover{background:rgba(255,255,255,.04)}
.accordion__title{font-size:16px}
.accordion__chev{
  font-family:var(--mono);
  color:rgba(233,238,255,.68);
}
.accordion__panel{padding:0 14px 14px;color:var(--muted)}
[data-accordion][data-open="false"] .accordion__chev{transform:rotate(0deg)}
[data-accordion][data-open="true"] .accordion__chev{transform:rotate(90deg)}

.site-footer{
  border-top:1px solid rgba(255,255,255,.10);
  background: rgba(7,10,16,.75);
  padding:30px 0;
}
.footer__inner{display:grid;gap:18px}
.footer__cols{
  display:grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap:18px;
}
.footer__title{
  font-family:var(--mono);
  font-size:12px;
  letter-spacing:.08em;
  text-transform:uppercase;
  color:rgba(233,238,255,.72);
  margin-bottom:10px;
}
.footer__muted{color:var(--muted);font-size:13px;max-width:52ch}
.footer__links{display:grid;gap:8px}
.footer__link{color:rgba(233,238,255,.72);text-decoration:none;font-size:13px}
.footer__link:hover{color:var(--text)}
.footer__bar{
  display:flex;
  justify-content:space-between;
  gap:14px;
  padding-top:16px;
  border-top:1px solid rgba(255,255,255,.10);
  color:rgba(233,238,255,.60);
  font-size:12px;
}
.footer__bar-right{display:flex;gap:12px;align-items:center;flex-wrap:wrap}

.related{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
  margin-top:14px;
}
.related a{font-size:13px}

.list{
  margin:0;
  padding-left:16px;
  color:var(--muted);
}
.list li{margin:8px 0}

.kbd{
  font-family:var(--mono);
  font-size:12px;
  border:1px solid rgba(255,255,255,.18);
  background: rgba(255,255,255,.04);
  padding:3px 6px;
  border-radius:8px;
  color:rgba(233,238,255,.78);
}

@media (max-width: 980px){
  .tool-layout{grid-template-columns: 1fr}
  .footer__cols{grid-template-columns:1fr}
}

@media (max-width: 560px){
  .header__inner{flex-direction:column;align-items:flex-start}
  .nav{justify-content:flex-start}
  .split{grid-template-columns:1fr}
  .card__title{font-size:16px}
  .result__value{font-size:20px}
}