:root{
  --bg:#0a0f12;
  --panel-line:rgba(255,255,255,.09);
  --ink:#eef2f0;
  --muted:#8a978f;
  --accent:#16d68a;
  --accent2:#4dffb8;
  --glow:rgba(22,214,138,.4);
  --warn:#ff6b5d;
  --warn-bg:rgba(255,107,93,.1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--ink);
  font-family:"Newsreader",Georgia,serif;font-size:18px;line-height:1.7;
  -webkit-font-smoothing:antialiased;min-height:100vh;display:flex;flex-direction:column;
  position:relative;overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;z-index:-2;
  background:
    radial-gradient(900px 600px at 80% -10%, rgba(22,214,138,.16), transparent 55%),
    radial-gradient(800px 700px at 5% 105%, rgba(77,255,184,.07), transparent 55%),
    var(--bg);
}
body::after{
  content:"";position:fixed;inset:0;z-index:-1;opacity:.04;pointer-events:none;
  background-image:radial-gradient(var(--ink) 1px,transparent 1px);background-size:34px 34px;
}
a{color:var(--accent2);text-decoration:none}
a:hover{color:var(--accent);text-decoration:underline}

.site-header{display:flex;align-items:center;justify-content:space-between;max-width:940px;margin:0 auto;width:100%;padding:1.6rem 1.5rem}
.logo{font-family:"Fraunces",serif;font-weight:900;font-size:1.35rem;color:var(--ink);letter-spacing:-.5px}
.logo span{color:var(--accent)}
.site-header nav a{font-family:"Fraunces",serif;font-weight:600;font-size:.95rem;color:var(--muted);margin-left:1.4rem;transition:.2s}
.site-header nav a:hover,.site-header nav a.active{color:var(--ink);text-decoration:none}

main{max-width:940px;margin:0 auto;width:100%;padding:0 1.5rem 4rem;flex:1}

.hero{text-align:center;padding:2.2rem 0 1.2rem;animation:rise .7s ease both}
.eyebrow{display:inline-block;font-family:"Fraunces",serif;font-weight:600;font-size:.75rem;text-transform:uppercase;letter-spacing:.22em;color:var(--accent);border:1px solid var(--panel-line);border-radius:999px;padding:.4rem 1rem;background:rgba(255,255,255,.04)}
.hero h1{font-family:"Fraunces",serif;font-weight:900;font-size:clamp(2.4rem,7vw,4.2rem);line-height:.98;letter-spacing:-.03em;margin:1rem 0;background:linear-gradient(180deg,#fff,#c9d2cd);-webkit-background-clip:text;background-clip:text;color:transparent}
.lede{font-size:1.12rem;color:var(--muted);max-width:580px;margin:0 auto}

.tool{margin:1.4rem auto 3rem;animation:rise .7s .1s ease both}
.tool-card{position:relative;background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.02));border:1px solid var(--panel-line);border-radius:24px;padding:2rem;box-shadow:0 30px 80px rgba(0,0,0,.5),inset 0 1px 0 rgba(255,255,255,.06);backdrop-filter:blur(8px)}

.result{position:relative;text-align:center;padding:2rem 1rem 1.6rem;border-radius:18px;background:radial-gradient(120% 140% at 50% 0%, rgba(22,214,138,.16), transparent 60%),rgba(0,0,0,.25);border:1px solid var(--panel-line);overflow:hidden}
.result-label{font-family:"Fraunces",serif;font-weight:600;letter-spacing:.28em;text-transform:uppercase;font-size:.78rem;color:var(--muted)}
.result-number{display:block;font-family:"Fraunces",serif;font-weight:900;font-size:clamp(3rem,14vw,5.2rem);line-height:.92;letter-spacing:-.03em;background:linear-gradient(180deg,var(--accent2),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent;text-shadow:0 0 50px var(--glow);transition:transform .25s}
.result-number.pop{animation:pop .4s ease}
.result-sub{display:block;color:var(--muted);font-size:1rem;margin-top:.6rem;min-height:1.4em}

.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:.6rem;margin-top:1.4rem}
.stat{background:rgba(255,255,255,.03);border:1px solid var(--panel-line);border-radius:12px;padding:.85rem .5rem;text-align:center}
.stat b{display:block;font-family:"Fraunces",serif;font-size:1.3rem;font-weight:900;color:var(--ink)}
.stat span{font-size:.68rem;text-transform:uppercase;letter-spacing:.1em;color:var(--muted)}

.fields{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-top:1.6rem}
.field.full{grid-column:1/-1}
.field label{display:block;font-family:"Fraunces",serif;font-weight:600;font-size:.78rem;text-transform:uppercase;letter-spacing:.09em;color:var(--muted);margin-bottom:.45rem}
.input-wrap{position:relative;display:flex;align-items:center}
.input-wrap .affix{position:absolute;color:var(--muted);font-size:1rem;pointer-events:none}
.input-wrap .affix.pre{left:1rem}
.input-wrap .affix.post{right:1rem}
.field input,.field select{width:100%;padding:.9rem 1rem;font-family:"Newsreader",serif;font-size:1.05rem;background:rgba(0,0,0,.3);border:1px solid var(--panel-line);border-radius:12px;color:var(--ink);transition:.2s}
.input-wrap.has-pre input{padding-left:2rem}
.input-wrap.has-post input{padding-right:2.4rem}
.field input:focus,.field select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(22,214,138,.18)}
.field select{cursor:pointer;appearance:none;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='%238a978f' d='M6 8 0 0h12z'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 1rem center}

.dir-toggle{display:flex;gap:.5rem}
.dir-btn{flex:1;font-family:"Fraunces",serif;font-weight:700;font-size:.95rem;padding:.8rem;border:1px solid var(--panel-line);background:rgba(0,0,0,.3);border-radius:12px;color:var(--muted);cursor:pointer;transition:.18s}
.dir-btn.active{color:var(--ink);border-color:var(--accent);background:rgba(22,214,138,.12)}

.warn{display:none;margin-top:1rem;padding:.85rem 1.1rem;background:var(--warn-bg);border:1px solid rgba(255,107,93,.35);border-left:3px solid var(--warn);border-radius:0 10px 10px 0;color:#ffb3aa;font-size:.95rem}
.warn.show{display:block}

.info{border-top:1px solid var(--panel-line);padding-top:2.5rem}
.info h2{font-family:"Fraunces",serif;font-weight:900;font-size:1.7rem;letter-spacing:-.01em;margin:2rem 0 .8rem;color:var(--ink)}
.info h2:first-child{margin-top:0}
.info p{margin-bottom:1rem;color:#bcc6c0}
.formula{font-family:"Fraunces",serif;background:rgba(0,0,0,.3);border:1px solid var(--panel-line);border-radius:12px;padding:1.1rem 1.3rem;margin:1rem 0;color:var(--accent2);font-size:1.05rem;text-align:center}

.faq details{border:1px solid var(--panel-line);border-radius:14px;padding:.95rem 1.2rem;margin-bottom:.7rem;background:rgba(255,255,255,.03)}
.faq summary{font-family:"Fraunces",serif;font-weight:600;cursor:pointer;list-style:none;font-size:1.05rem;color:var(--ink)}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";float:right;color:var(--accent);font-weight:900}
.faq details[open] summary::after{content:"–"}
.faq details p{margin:.7rem 0 0;color:var(--muted)}

.cross-link{margin-top:2rem;padding:1.2rem 1.4rem;background:rgba(22,214,138,.08);border-left:3px solid var(--accent);border-radius:0 12px 12px 0}
.cross-link p{margin:0;color:#bcc6c0}

.disclaimer{margin-top:2rem;font-size:.85rem;color:var(--muted);text-align:center;line-height:1.6}

.post-header{text-align:center;padding:2.5rem 0 1.5rem;border-bottom:1px solid var(--panel-line);margin-bottom:2rem}
.post-meta{font-family:"Fraunces",serif;font-size:.82rem;text-transform:uppercase;letter-spacing:.16em;color:var(--accent)}
.post-header h1{font-family:"Fraunces",serif;font-weight:900;font-size:clamp(2rem,6vw,3rem);line-height:1.05;margin:.6rem auto;max-width:660px;letter-spacing:-.02em;color:var(--ink)}
article.post h2{font-family:"Fraunces",serif;font-weight:900;font-size:1.6rem;margin:2.2rem 0 .7rem;letter-spacing:-.01em;color:var(--ink)}
article.post p{margin-bottom:1.2rem;color:#bcc6c0}
article.post ul{margin:0 0 1.2rem 1.4rem;color:#bcc6c0}
article.post li{margin-bottom:.4rem}
article.post strong{color:var(--ink)}
.post-cta{margin:2.5rem 0;padding:1.8rem;text-align:center;background:rgba(255,255,255,.03);border:1px solid var(--panel-line);border-radius:18px}
.post-cta a{display:inline-block;margin-top:.6rem;font-family:"Fraunces",serif;font-weight:900;background:var(--accent);color:#04130c;padding:.8rem 1.8rem;border-radius:999px;text-decoration:none}
.post-cta a:hover{background:var(--accent2)}

.blog-list{padding-top:1rem}
.blog-list h1{font-family:"Fraunces",serif;font-weight:900;font-size:clamp(2.2rem,6vw,3.2rem);margin-bottom:1rem;letter-spacing:-.02em;color:var(--ink)}
.post-card{display:block;background:rgba(255,255,255,.03);border:1px solid var(--panel-line);border-radius:16px;padding:1.6rem;margin-bottom:1rem;color:var(--ink);transition:.2s}
.post-card:hover{transform:translateY(-3px);text-decoration:none;border-color:var(--accent);box-shadow:0 20px 50px rgba(0,0,0,.4)}
.post-card .post-meta{display:block;margin-bottom:.4rem}
.post-card h2{font-family:"Fraunces",serif;font-weight:900;font-size:1.4rem;margin-bottom:.4rem;color:var(--ink)}
.post-card p{color:var(--muted);font-size:1rem}

.site-footer{border-top:1px solid var(--panel-line);padding:1.8rem 1.5rem;text-align:center;color:var(--muted);font-size:.95rem}
.site-footer a{color:var(--muted)}
.site-footer a:hover{color:var(--accent)}

@keyframes rise{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
@keyframes pop{0%{transform:scale(1)}40%{transform:scale(1.07)}100%{transform:scale(1)}}

@media(max-width:560px){
  body{font-size:17px}
  .tool-card{padding:1.4rem}
  .fields{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr;gap:.5rem}
}