:root{--ink:#e8eef8;--muted:#9ba9bd;--bg:#080d16;--panel:#101826;--panel2:#151f30;--line:#263249;--mint:#39e6b0;--blue:#72a5ff;--orange:#ffbd5a;--red:#ff6681;--shadow:0 20px 55px #0006;--r:16px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(circle at 87% -10%,#183b5e 0,transparent 28rem),var(--bg);color:var(--ink);font:16px/1.55 Inter,ui-sans-serif,system-ui,-apple-system,sans-serif}a{color:inherit;text-decoration:none}.wrap{width:min(1320px,calc(100% - 34px));margin:auto}.top{height:68px;border-bottom:1px solid #ffffff12;background:#09101beF;backdrop-filter:blur(18px);position:sticky;top:0;z-index:20}.nav{height:100%;display:flex;align-items:center;gap:28px}.brand{font-size:1.18rem;letter-spacing:-.05em;font-weight:850;white-space:nowrap}.brand i{color:var(--mint);font-style:normal;font-size:1.5rem}.links{display:flex;gap:20px;margin-left:auto;color:var(--muted);font-size:.9rem}.links a:hover{color:var(--ink)}button,.button{font:inherit;border:0;cursor:pointer;border-radius:10px;padding:11px 15px;background:var(--mint);color:#04251d;font-weight:780}.theme{margin-left:2px;border:1px solid var(--line);background:transparent;color:var(--ink);padding:8px 10px}.hero{padding:92px 0 74px}.eyebrow{color:var(--mint);font-size:.72rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase}.hero h1,.calc-intro h1{font-size:clamp(2.35rem,5.5vw,4.8rem);letter-spacing:-.065em;line-height:1.01;max-width:900px;margin:12px 0 18px}.hero p,.calc-intro p{font-size:1.08rem;color:var(--muted);max-width:740px}.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:26px}.button.ghost{background:transparent;color:var(--ink);border:1px solid var(--line)}.search{max-width:800px;margin-top:37px;position:relative}.search input,.field input,.field select,.tool-select{background:#0d1522;border:1px solid var(--line);color:var(--ink);border-radius:10px;width:100%;padding:14px 14px;font:inherit;outline:none}.search input{padding:17px 20px}.search input:focus,.field input:focus,.field select:focus{border-color:var(--blue);box-shadow:0 0 0 3px #72a5ff23}.search-results{position:absolute;left:0;right:0;z-index:5;background:var(--panel);border:1px solid var(--line);border-radius:12px;overflow:hidden}.search-results:empty{display:none}.search-results a{display:block;padding:11px 15px;border-bottom:1px solid var(--line)}section{padding:58px 0}.section-head{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:22px}.section-head h2{font-size:clamp(1.7rem,3vw,2.45rem);line-height:1.1;letter-spacing:-.045em;margin:6px 0 0}.section-head p{max-width:550px;color:var(--muted);margin:0}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.card{background:linear-gradient(145deg,#131d2c,#0e1521);border:1px solid var(--line);border-radius:var(--r);padding:21px}.tool-card{min-height:175px;display:flex;flex-direction:column;transition:.18s}.tool-card:hover{transform:translateY(-3px);border-color:#45bca0;background:linear-gradient(145deg,#17332f,#101b2a)}.tool-card strong{font-size:1.06rem;margin-top:7px}.tool-card p{font-size:.9rem;color:var(--muted);margin:7px 0 17px}.tag{color:var(--mint);font-weight:800;font-size:.7rem;letter-spacing:.09em}.two{display:grid;grid-template-columns:1.12fr .88fr;gap:22px}.callout{align-self:center;background:linear-gradient(130deg,#143e40,#142a48);border:1px solid #3a766e;border-radius:14px;padding:21px;color:#cfefec}.calc-shell{padding-bottom:70px}.crumb{color:var(--muted);padding-top:20px;font-size:.85rem}.calc-intro{padding:36px 0 26px}.calc-intro h1{font-size:clamp(2rem,4.2vw,3.7rem);max-width:850px}.workspace{display:grid;grid-template-columns:255px minmax(0,1fr);gap:18px;align-items:start}.tool-nav{position:sticky;top:85px;background:#0d1521;border:1px solid var(--line);padding:9px;border-radius:15px}.tool-nav label{display:block;padding:8px;color:var(--muted);font-size:.77rem;font-weight:750;text-transform:uppercase;letter-spacing:.1em}.tool-select{padding:10px;margin-bottom:8px}.tool-nav button{display:block;width:100%;text-align:left;background:transparent;color:var(--muted);font-size:.86rem;font-weight:600;padding:10px}.tool-nav button.active,.tool-nav button:hover{color:var(--ink);background:#1b2a3d}.tool-nav button.active{border-left:2px solid var(--mint);border-radius:0}.tool-category{font-size:.68rem;letter-spacing:.11em;text-transform:uppercase;color:#67809b;padding:13px 10px 5px;font-weight:800}.tool-main{min-width:0}.tool-head{display:flex;justify-content:space-between;gap:18px;border-bottom:1px solid var(--line);padding:10px 0 22px;margin-bottom:18px}.tool-head h1{font-size:clamp(1.7rem,3vw,2.65rem);letter-spacing:-.05em;line-height:1.05;margin:6px 0}.tool-head p{margin:0;color:var(--muted);max-width:680px}.favorite{align-self:start;white-space:nowrap;background:transparent;color:var(--muted);border:1px solid var(--line)}.calc-layout{display:grid;grid-template-columns:minmax(310px,.92fr) minmax(340px,1.08fr);gap:18px}.panel{background:linear-gradient(150deg,#121c2b,#0d1420);border:1px solid var(--line);border-radius:var(--r);padding:21px;box-shadow:var(--shadow)}.panel h2{font-size:1rem;margin:0 0 18px}.field{margin-bottom:14px}.field label{color:#d2dbea;display:block;font-size:.82rem;font-weight:650;margin-bottom:6px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 12px}.calc-action{display:flex;justify-content:space-between;align-items:center;margin-top:8px}.error{color:#ffbac7;font-size:.85rem;min-height:22px}.result-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:9px}.result{padding:13px;border:1px solid #2b3b53;border-radius:11px;background:#0b1320}.result:first-child{grid-column:span 2;background:linear-gradient(110deg,#123b37,#152d49);border-color:#357e72}.result span{font-size:.72rem;color:var(--muted);display:block}.result strong{display:block;font-size:1.23rem;margin-top:3px;letter-spacing:-.03em}.chart{height:190px;display:flex;align-items:end;gap:3px;border-bottom:1px solid var(--line);margin-top:15px;padding:12px 2px 0}.bar{flex:1;min-width:3px;background:linear-gradient(#83b8ff,#3be3b0);border-radius:4px 4px 0 0}.formula{font-family:ui-monospace,SFMono-Regular,Consolas,monospace;color:#cce0ff;border:1px solid var(--line);background:#09111e;border-radius:10px;padding:13px}.risk{margin-top:14px;background:#332613;color:#ffe0a9;border-left:3px solid var(--orange);border-radius:8px;padding:12px 14px;font-size:.84rem}.compound-banner{padding:14px 16px;margin-bottom:16px;border:1px solid #2d8775;border-radius:12px;background:linear-gradient(100deg,#123b36,#122b48);display:flex;justify-content:space-between;gap:14px;color:#e0fffa}.compound-banner span{font-size:.71rem;letter-spacing:.12em;text-transform:uppercase;font-weight:850;color:var(--mint)}.helper{font-size:.8rem;color:var(--muted);margin:0 0 14px}.insights{margin-top:18px;display:grid;grid-template-columns:1fr 1fr;gap:18px}.faq details{border-top:1px solid var(--line);padding:15px 0}.faq summary{font-weight:750;cursor:pointer}.faq p{color:var(--muted)}.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:12px;margin-top:16px}table{width:100%;border-collapse:collapse;font-size:.86rem}th,td{text-align:right;padding:11px;border-bottom:1px solid #233047;white-space:nowrap}th:first-child,td:first-child{text-align:left}th{background:#111c2b;color:var(--muted);font-weight:700}footer{border-top:1px solid var(--line);padding:38px 0;color:var(--muted);font-size:.88rem}.footer-grid{display:flex;justify-content:space-between;gap:20px}.light{--ink:#102033;--muted:#5d7087;--bg:#f3f7fb;--panel:#fff;--panel2:#edf3f8;--line:#d5e1eb;--shadow:0 15px 35px #16395712}.light body{background:radial-gradient(circle at 87% -10%,#cfe8ff,transparent 28rem),var(--bg)}.light .top{background:#ffffffdf}.light .card,.light .panel{background:#fff}.light .tool-nav,.light .field input,.light .field select,.light .result{background:#f6f9fc}.light .tool-nav button.active{background:#e9f6f3}.light .compound-banner{background:linear-gradient(100deg,#dffbf3,#e4efff);color:#17304a}.light .formula{background:#f2f6fa}@media(max-width:900px){.workspace{grid-template-columns:1fr}.tool-nav{position:relative;top:auto;display:flex;overflow:auto;padding:8px}.tool-nav label,.tool-category{display:none}.tool-nav button{white-space:nowrap;width:auto}.tool-select{display:none}.calc-layout{grid-template-columns:1fr}.tool-head{display:block}.favorite{margin-top:12px}.grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:620px){.links{display:none}.nav{gap:12px}.theme{margin-left:auto}.hero{padding:60px 0 45px}.hero h1{font-size:2.55rem}.grid,.two,.insights{grid-template-columns:1fr}.form-grid{grid-template-columns:1fr}.result-grid{grid-template-columns:1fr}.result:first-child{grid-column:auto}.section-head,.footer-grid{display:block}.section-head p{margin-top:10px}.tool-nav{margin:0 -2px}.calc-layout{gap:12px}.panel{padding:16px}section{padding:42px 0}}