/* CalcDesk v8 — premium light utility UI */
:root{
  --bg:#f6f7f9;
  --ink:#0b1220;
  --ink-2:#1e293b;
  --muted:#64748b;
  --faint:#94a3b8;
  --line:#e2e8f0;
  --line-2:#f1f5f9;
  --brand:#0f766e;
  --brand-2:#0d9488;
  --brand-ink:#042f2e;
  --brand-soft:#ccfbf1;
  --brand-glow:rgba(13,148,136,.18);
  --navy:#0f172a;
  --ok:#047857;
  --ok-bg:#ecfdf5;
  --ok-line:#a7f3d0;
  --radius:16px;
  --max:1140px;
  --header:68px;
  --font:'Plus Jakarta Sans', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --display:'Outfit', var(--font);
  --shadow-sm:0 1px 2px rgba(15,23,42,.05);
  --shadow:0 10px 30px rgba(15,23,42,.06), 0 2px 8px rgba(15,23,42,.04);
  --shadow-lg:0 24px 60px rgba(15,23,42,.10), 0 8px 20px rgba(15,23,42,.05);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0; min-height:100vh;
  font-family:var(--font);
  color:var(--ink);
  background:
    radial-gradient(1000px 480px at 10% -8%, rgba(13,148,136,.10), transparent 55%),
    radial-gradient(800px 400px at 100% 0%, rgba(29,78,216,.06), transparent 45%),
    var(--bg);
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--brand); text-decoration:none}
a:hover{color:var(--brand-2)}
.wrap{max-width:var(--max); margin:0 auto; padding:0 1.25rem}

.site-header{
  position:sticky; top:0; z-index:1000; height:var(--header);
  background:rgba(255,255,255,.86);
  border-bottom:1px solid rgba(226,232,240,.95);
  backdrop-filter:saturate(160%) blur(14px);
  -webkit-backdrop-filter:saturate(160%) blur(14px);
}
.header-inner{
  height:var(--header); display:flex; align-items:center; justify-content:space-between; gap:1rem;
}
.logo{
  display:inline-flex; align-items:center; gap:.65rem;
  font-family:var(--display); font-weight:700; font-size:1.15rem; letter-spacing:-.03em;
  color:var(--navy); text-decoration:none;
}
.logo:hover{color:var(--navy); text-decoration:none}
.logo span{color:var(--brand); font-weight:700}
.logo-mark{
  width:34px; height:34px; border-radius:11px;
  display:grid; place-items:center;
  background:linear-gradient(145deg,#14b8a6,#0f766e);
  color:#fff; font-size:.72rem; font-weight:800; letter-spacing:-.04em;
  box-shadow:0 8px 18px rgba(15,118,110,.28), inset 0 1px 0 rgba(255,255,255,.35);
}
.nav-toggle{
  display:none; appearance:none; border:1px solid var(--line); background:#fff;
  color:var(--ink-2); border-radius:10px; padding:.55rem .85rem;
  font:600 .88rem var(--font); cursor:pointer; box-shadow:var(--shadow-sm);
}
#site-nav{display:flex; align-items:center; gap:2px}
.nav-item{position:relative}
.nav-item > .nav-top{
  appearance:none; border:0; background:transparent; cursor:pointer;
  display:inline-flex; align-items:center; gap:.35rem;
  color:var(--muted); font:600 .9rem var(--font);
  padding:.55rem .8rem; border-radius:999px; white-space:nowrap;
}
.nav-item > .nav-top:hover, .nav-item.open > .nav-top{
  color:var(--navy); background:#fff; box-shadow:var(--shadow-sm);
  outline:1px solid var(--line);
}
.nav-item > .nav-top .caret{font-size:.62rem; opacity:.7; transition:transform .15s}
.nav-item.open > .nav-top .caret{transform:rotate(180deg)}
.nav-link-simple{
  display:inline-flex; align-items:center; color:var(--muted); font:600 .9rem var(--font);
  padding:.55rem .8rem; border-radius:999px; text-decoration:none; white-space:nowrap;
}
.nav-link-simple:hover{color:var(--navy); background:#fff; box-shadow:var(--shadow-sm); text-decoration:none}
.nav-drop{
  position:absolute; top:calc(100% + 10px); left:0; width:280px;
  display:none; flex-direction:column; gap:2px; padding:8px;
  background:#fff; border:1px solid var(--line); border-radius:16px;
  box-shadow:var(--shadow-lg); z-index:1200;
}
.nav-item::after{content:""; position:absolute; left:0; right:0; top:100%; height:14px}
.nav-item:hover > .nav-drop, .nav-item.open > .nav-drop{display:flex}
.nav-drop a{
  display:block; padding:11px 12px; border-radius:11px;
  color:var(--ink-2); font-size:.9rem; font-weight:600; line-height:1.25; text-decoration:none;
}
.nav-drop a:hover{background:var(--brand-soft); color:var(--brand-ink); text-decoration:none}
.nav-drop a.view-all{
  margin-top:4px; border-top:1px solid var(--line-2); color:var(--brand); font-size:.84rem;
}
@media(max-width:900px){
  .nav-toggle{display:inline-flex}
  #site-nav{
    display:none; position:absolute; left:0; right:0; top:100%;
    flex-direction:column; align-items:stretch; gap:4px;
    background:#fff; border-bottom:1px solid var(--line);
    padding:10px 14px 16px; max-height:min(78vh,640px); overflow:auto;
    box-shadow:var(--shadow);
  }
  #site-nav.open{display:flex}
  .nav-item{width:100%}
  .nav-item > .nav-top, .nav-link-simple{width:100%; justify-content:space-between}
  .nav-item::after{display:none}
  .nav-drop{position:static; width:100%; display:none; box-shadow:none; border-color:var(--line-2); background:var(--bg)}
  .nav-item:hover > .nav-drop{display:none}
  .nav-item.open > .nav-drop{display:flex}
}

.hero{padding:3.4rem 0 1.6rem}
.hero-grid{display:grid; grid-template-columns:1.2fr .8fr; gap:2rem; align-items:center}
@media(max-width:920px){.hero-grid{grid-template-columns:1fr}}
.eyebrow{
  display:inline-flex; align-items:center; gap:.5rem;
  margin:0 0 1rem; padding:6px 12px 6px 8px; border-radius:999px;
  background:#fff; border:1px solid var(--line); color:var(--ink-2);
  font-size:.8rem; font-weight:600; box-shadow:var(--shadow-sm);
}
.eyebrow b{
  display:inline-grid; place-items:center; width:20px; height:20px; border-radius:999px;
  background:var(--brand-soft); color:var(--brand); font-size:.65rem;
}
.hero h1{
  margin:0 0 .9rem; max-width:14ch;
  font-family:var(--display); font-weight:700;
  font-size:clamp(2.35rem, 5vw, 3.6rem);
  letter-spacing:-.045em; line-height:1.02; color:var(--navy);
}
.hero h1 em{
  font-style:normal;
  background:linear-gradient(120deg, var(--brand) 0%, #0891b2 100%);
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.hero-lead{
  margin:0 0 1.35rem; max-width:40ch; color:var(--muted);
  font-size:1.08rem; line-height:1.65; font-weight:500;
}
.search{
  display:flex; gap:8px; align-items:center; max-width:520px;
  padding:7px; border-radius:16px; background:#fff;
  border:1px solid var(--line); box-shadow:var(--shadow);
}
.search:focus-within{border-color:#99f6e4; box-shadow:0 0 0 4px var(--brand-glow), var(--shadow)}
.search input{
  flex:1; border:0; outline:0; background:transparent;
  font:500 1rem var(--font); color:var(--ink); padding:.7rem .75rem;
}
.search input::placeholder{color:var(--faint); font-weight:500}
.search button, .btn{
  appearance:none; border:0; cursor:pointer;
  border-radius:12px; padding:.78rem 1.15rem;
  background:linear-gradient(180deg, #14b8a6, #0f766e);
  color:#fff; font:700 .92rem var(--font);
  box-shadow:0 8px 18px rgba(15,118,110,.25), inset 0 1px 0 rgba(255,255,255,.25);
  transition:transform .12s ease, filter .12s ease;
}
.search button:hover, .btn:hover{filter:brightness(1.05)}
.search button:active, .btn:active{transform:translateY(1px)}
.btn.block{width:100%}
.chips{display:flex; flex-wrap:wrap; gap:.5rem; margin-top:1.15rem}
.chip{
  display:inline-flex; align-items:center; gap:.35rem;
  padding:.42rem .8rem; border-radius:999px;
  background:rgba(255,255,255,.9); border:1px solid var(--line);
  color:var(--ink-2); font-size:.82rem; font-weight:600; text-decoration:none;
}
.chip:hover{border-color:#99f6e4; background:#fff; color:var(--brand-ink); text-decoration:none}

.hero-panel{
  position:relative; border-radius:24px; padding:1.35rem;
  background:linear-gradient(160deg, #0f766e 0%, #115e59 42%, #0f172a 100%);
  color:#ecfeff; box-shadow:var(--shadow-lg); overflow:hidden; min-height:300px;
}
.hero-panel::before{
  content:""; position:absolute; inset:-20% auto auto 40%; width:280px; height:280px;
  background:radial-gradient(circle, rgba(45,212,191,.35), transparent 65%); pointer-events:none;
}
.hero-panel-inner{position:relative; z-index:1}
.hero-panel .kicker{font-size:.78rem; font-weight:700; letter-spacing:.08em; text-transform:uppercase; opacity:.8; margin:0 0 .55rem}
.hero-panel h2{margin:0 0 .85rem; font-family:var(--display); font-size:1.45rem; letter-spacing:-.03em; line-height:1.15; font-weight:700}
.hero-stats{display:grid; grid-template-columns:1fr 1fr; gap:.7rem; margin-top:1.1rem}
.stat{
  background:rgba(255,255,255,.08); border:1px solid rgba(255,255,255,.12);
  border-radius:14px; padding:.85rem .9rem;
}
.stat strong{display:block; font-size:1.25rem; font-weight:800; letter-spacing:-.03em}
.stat span{display:block; font-size:.78rem; opacity:.8; font-weight:600; margin-top:.15rem}
.hero-list{margin:0; padding:0; list-style:none}
.hero-list li{
  display:flex; gap:.6rem; align-items:flex-start;
  padding:.45rem 0; font-size:.92rem; font-weight:600; color:rgba(236,254,255,.92);
}
.hero-list li i{
  width:22px; height:22px; border-radius:999px; flex:0 0 auto;
  display:grid; place-items:center; background:rgba(255,255,255,.12); font-style:normal; font-size:.75rem;
}

.layout{display:grid; grid-template-columns:minmax(0,1fr) 300px; gap:1.4rem; padding:0 0 3.75rem}
@media(max-width:980px){.layout{grid-template-columns:1fr}.sidebar-desktop{display:none}}
.section-title{
  display:flex; align-items:end; justify-content:space-between; gap:1rem;
  margin:1.9rem 0 .9rem;
}
.section-title span{
  font-family:var(--display); font-size:1.25rem; font-weight:700; letter-spacing:-.03em; color:var(--navy);
}
.section-title a{font-size:.86rem; font-weight:700; color:var(--muted)}
.section-title a:hover{color:var(--brand)}

.grid{display:grid; grid-template-columns:repeat(auto-fill,minmax(240px,1fr)); gap:1rem}
.card{
  display:flex; flex-direction:column; gap:.55rem;
  padding:1.15rem 1.15rem 1.2rem; min-height:156px;
  background:#fff; border:1px solid var(--line); border-radius:20px;
  box-shadow:var(--shadow-sm); color:inherit; text-decoration:none;
  transition:transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.card:hover{
  transform:translateY(-3px); text-decoration:none; color:inherit;
  border-color:#99f6e4; box-shadow:var(--shadow);
}
.card-top{display:flex; align-items:center; justify-content:space-between; gap:.5rem}
.card-ico{
  width:42px; height:42px; border-radius:14px; display:grid; place-items:center;
  font-size:1.15rem; background:var(--line-2); border:1px solid var(--line);
}
.card .badge{
  display:inline-flex; align-items:center; padding:4px 9px; border-radius:999px;
  font-size:.68rem; font-weight:800; letter-spacing:.04em; text-transform:uppercase;
}
.card h3{
  margin:0; font-family:var(--display); font-size:1.05rem; font-weight:700;
  letter-spacing:-.025em; color:var(--navy); line-height:1.2;
}
.card p{margin:0; color:var(--muted); font-size:.9rem; line-height:1.45; font-weight:500; flex:1}
.card .go{margin-top:.2rem; font-size:.84rem; font-weight:800; color:var(--brand)}
.card:hover .go{color:var(--brand-2)}
.badge-finance{color:#0f766e; background:#ecfdf5}
.badge-health{color:#c2410c; background:#fff7ed}
.badge-math{color:#1d4ed8; background:#eff6ff}
.badge-converters{color:#7c3aed; background:#f5f3ff}
.ico-finance{background:#ecfdf5; border-color:#99f6e4}
.ico-health{background:#fff7ed; border-color:#fed7aa}
.ico-math{background:#eff6ff; border-color:#bfdbfe}
.ico-converters{background:#f5f3ff; border-color:#ddd6fe}

.ad-slot{
  display:flex; align-items:center; justify-content:center; text-align:center;
  min-height:100px; padding:1rem; border-radius:16px;
  border:1px dashed #cbd5e1; background:rgba(255,255,255,.65);
  color:var(--faint); font-size:.75rem; font-weight:700; letter-spacing:.04em; text-transform:uppercase;
}
.ad-top{margin:1.35rem 0 1.5rem}
.ad-side{min-height:280px; position:sticky; top:calc(var(--header) + 16px)}
.ad-bottom{margin:2rem 0}
.side-card{
  margin-top:1rem; padding:1.1rem 1.15rem; border-radius:20px;
  background:#fff; border:1px solid var(--line); box-shadow:var(--shadow-sm);
}
.side-card h3{margin:0 0 .7rem; font-family:var(--display); font-size:1rem; font-weight:700; color:var(--navy)}
.side-card a{
  display:flex; align-items:center; justify-content:space-between;
  padding:.55rem 0; border-top:1px solid var(--line-2);
  color:var(--ink-2); font-size:.9rem; font-weight:650; text-decoration:none;
}
.side-card a:first-of-type{border-top:0}
.side-card a::after{content:"→"; color:var(--faint); font-weight:700}
.side-card a:hover{color:var(--brand)}

.breadcrumbs{font-size:.82rem; color:var(--faint); margin:1.2rem 0 .35rem; font-weight:650}
.breadcrumbs a{color:var(--muted); font-weight:700}
.breadcrumbs a:hover{color:var(--brand)}
.page-title{
  margin:.1rem 0 .45rem; font-family:var(--display); font-weight:750;
  font-size:clamp(1.7rem, 3vw, 2.2rem); letter-spacing:-.035em; color:var(--navy); line-height:1.1;
}
.lead{margin:0 0 1.15rem; max-width:54ch; color:var(--muted); font-size:1rem; font-weight:500}
.calc-shell{display:grid; grid-template-columns:minmax(0,1.15fr) minmax(270px,.85fr); gap:1.15rem}
@media(max-width:900px){.calc-shell{grid-template-columns:1fr}}
.panel{
  padding:1.3rem 1.35rem 1.4rem; border-radius:22px;
  background:#fff; border:1px solid var(--line); box-shadow:var(--shadow);
}
.panel h3{margin:0 0 .55rem; font-family:var(--display); font-size:1.05rem; font-weight:750; color:var(--navy); letter-spacing:-.02em}
label{display:block; font-size:.8rem; font-weight:750; color:var(--ink-2); margin:.8rem 0 .35rem}
input, select, textarea{
  width:100%; appearance:none; border:1px solid var(--line); background:#f8fafc;
  color:var(--ink); border-radius:12px; padding:.78rem .9rem;
  font:600 .95rem var(--font); outline:0; transition:border-color .15s, box-shadow .15s, background .15s;
}
select{
  background-image:linear-gradient(45deg,transparent 50%,#64748b 50%),linear-gradient(135deg,#64748b 50%,transparent 50%);
  background-position:calc(100% - 18px) calc(50% - 2px), calc(100% - 13px) calc(50% - 2px);
  background-size:5px 5px,5px 5px; background-repeat:no-repeat; padding-right:2.2rem;
}
input:hover, select:hover, textarea:hover{background:#fff}
input:focus, select:focus, textarea:focus{
  background:#fff; border-color:#2dd4bf;
  box-shadow:0 0 0 4px var(--brand-glow);
}
.row2{display:grid; grid-template-columns:1fr 1fr; gap:.75rem}
@media(max-width:600px){.row2{grid-template-columns:1fr}}
.panel .btn{width:100%; margin-top:1.05rem; padding:.9rem 1rem; font-size:.95rem}
.result{
  margin-top:1.1rem; padding:1.05rem 1.1rem; border-radius:16px;
  background:var(--ok-bg); border:1px solid var(--ok-line);
}
.result .muted{display:block; font-size:.78rem; font-weight:800; color:var(--ok); letter-spacing:.04em; text-transform:uppercase; margin-bottom:.2rem}
.result strong{
  display:block; font-family:var(--display); font-size:1.85rem; font-weight:800;
  letter-spacing:-.035em; color:var(--ok); font-variant-numeric:tabular-nums; line-height:1.1;
}
.result .fine{margin-top:.4rem}
.fine{font-size:.88rem; color:var(--muted); line-height:1.5; font-weight:500}
.muted{color:var(--muted)}
.note{font-size:.8rem; color:var(--faint); margin-top:.9rem; font-weight:600}
ul.clean{padding-left:1.1rem; margin:.45rem 0}
ul.clean li{margin:.32rem 0; color:var(--muted); font-size:.9rem; font-weight:500}

.site-footer{
  margin-top:1rem; padding:2.75rem 0 2.5rem;
  background:#0b1220; color:#94a3b8;
}
.site-footer .logo{color:#f8fafc}
.site-footer .logo span{color:#2dd4bf}
.site-footer strong{
  display:block; color:#e2e8f0; font-size:.75rem; font-weight:800;
  letter-spacing:.08em; text-transform:uppercase; margin-bottom:.65rem;
}
.footer-grid{display:grid; grid-template-columns:1.7fr 1fr 1fr 1fr; gap:1.5rem}
@media(max-width:800px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.footer-grid{grid-template-columns:1fr}}
.site-footer a{color:#94a3b8; text-decoration:none; font-weight:600}
.site-footer a:hover{color:#f8fafc}
.site-footer .fine{color:#64748b}
.footer-copy{
  margin-top:1.8rem; padding-top:1.15rem; border-top:1px solid rgba(148,163,184,.18);
  color:#64748b; font-size:.8rem; font-weight:600;
}