:root{--bg:#f3fbf8;--card:#fff;--ink:#102a2b;--muted:#607879;--teal:#087f7b;--teal2:#0aa39c;--nav:#073b3a;--mint:#dff7ef;--accent:#f4b942;--border:#d8e9e5;--shadow:0 12px 35px rgba(7,59,58,.10)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--ink);background:radial-gradient(circle at 10% 0%,#e4fbf4 0,transparent 28%),var(--bg);line-height:1.55}
body.dark{--bg:#071d1d;--card:#0d2b2a;--ink:#e8fffa;--muted:#a8c2bf;--border:#234745;--shadow:0 12px 35px rgba(0,0,0,.25)}
a{color:inherit}.top{background:var(--nav);color:white;position:sticky;top:0;z-index:50;box-shadow:0 5px 20px rgba(0,0,0,.12)}.nav{max-width:1180px;margin:auto;padding:12px 18px;display:flex;align-items:center;gap:14px}.brand{font-weight:900;text-decoration:none;letter-spacing:-.3px;font-size:1.05rem;display:flex;align-items:center;gap:8px}.logo{width:35px;height:35px;border-radius:11px;background:linear-gradient(135deg,#16c5bb,#f4b942);display:grid;place-items:center;animation:float 3s ease-in-out infinite;box-shadow:0 7px 18px rgba(0,0,0,.2)}.navlinks{margin-left:auto;display:flex;gap:10px;align-items:center}.navlinks a,.iconbtn{border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.08);color:white;padding:8px 11px;border-radius:10px;text-decoration:none;font-size:.9rem;cursor:pointer}.hero{background:linear-gradient(135deg,#073b3a,#087f7b 55%,#0aa39c);color:white;padding:56px 18px 48px;overflow:hidden;position:relative}.hero:after,.hero:before{content:"";position:absolute;border-radius:50%;background:rgba(255,255,255,.08);animation:drift 9s ease-in-out infinite}.hero:before{width:240px;height:240px;right:-60px;top:-80px}.hero:after{width:150px;height:150px;left:-55px;bottom:-65px}.hero-inner{max-width:1180px;margin:auto;position:relative;z-index:1}.eyebrow{font-size:.8rem;font-weight:800;text-transform:uppercase;letter-spacing:.13em;opacity:.82}.hero h1{font-size:clamp(2rem,5vw,3.4rem);line-height:1.06;margin:8px 0 12px;letter-spacing:-1.5px}.hero p{max-width:760px;margin:0;color:#dffaf5}.search{margin-top:24px;max-width:720px;display:flex;gap:8px}.search input{flex:1;padding:14px 16px;border-radius:14px;border:1px solid rgba(255,255,255,.25);font-size:1rem;background:rgba(255,255,255,.97);color:#102a2b}.wrap{max-width:1180px;margin:auto;padding:28px 18px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}.card{background:var(--card);border:1px solid var(--border);border-radius:18px;padding:18px;box-shadow:var(--shadow);transition:transform .18s ease,box-shadow .18s ease}.card:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(7,59,58,.14)}.tool-card{text-decoration:none;display:block;position:relative;overflow:hidden}.tool-card:active,.btn:active,.iconbtn:active{transform:scale(.97)}.tool-icon{font-size:1.65rem}.tool-card h3{margin:8px 0 4px;font-size:1.03rem}.tool-card p{margin:0;color:var(--muted);font-size:.9rem}.section-title{display:flex;justify-content:space-between;gap:12px;align-items:end;margin:34px 0 14px}.section-title h2{margin:0;font-size:1.55rem}.muted{color:var(--muted)}.pill{display:inline-flex;gap:6px;align-items:center;border:1px solid var(--border);border-radius:999px;padding:6px 10px;font-size:.78rem;color:var(--muted)}
.tool-shell{max-width:880px;margin:auto}.tool-head{display:flex;gap:12px;align-items:center}.tool-head .bigicon{font-size:2.2rem}.tool-head h1{margin:0;font-size:clamp(1.8rem,4vw,2.7rem);line-height:1.1}.tool-desc{color:var(--muted);margin-top:7px}.toolbox{margin-top:20px}.formgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}.field label{display:block;font-weight:700;font-size:.85rem;margin-bottom:6px}.field input,.field select,.field textarea{width:100%;border:1px solid var(--border);background:var(--card);color:var(--ink);border-radius:11px;padding:11px 12px;font:inherit}.field textarea{min-height:180px;resize:vertical}.actions{display:flex;flex-wrap:wrap;gap:9px;margin-top:16px}.btn{border:0;border-radius:11px;padding:11px 15px;background:var(--teal);color:white;font-weight:800;cursor:pointer;transition:transform .12s ease,filter .12s ease}.btn:hover{filter:brightness(1.05)}.btn.alt{background:var(--nav)}.btn.light{background:var(--mint);color:var(--nav)}.result{display:none;margin-top:18px;border:1px solid var(--border);background:linear-gradient(135deg,var(--mint),var(--card));border-radius:17px;padding:18px}.result.show{display:block;animation:pop .25s ease}.result-main{font-size:2rem;font-weight:900;color:var(--teal)}.result small{color:var(--muted)}.formula{margin-top:18px;padding:14px;border-left:4px solid var(--teal);background:var(--mint);border-radius:10px}.note{padding:13px 15px;background:#fff7df;border:1px solid #f3d58b;border-radius:12px;color:#5c481d}.dark .note{background:#2b2411;color:#f5df9d}.content{margin-top:24px}.content h2{font-size:1.35rem;margin-top:28px}.content h3{font-size:1.05rem}.content li{margin:6px 0}.faq details{border:1px solid var(--border);background:var(--card);border-radius:12px;padding:12px 14px;margin:8px 0}.faq summary{font-weight:800;cursor:pointer}.related{margin-top:28px}.footer{margin-top:45px;background:var(--nav);color:#dffaf5;padding:34px 18px}.footer-inner{max-width:1180px;margin:auto;display:grid;grid-template-columns:2fr 1fr 1fr;gap:25px}.footer a{color:#dffaf5;text-decoration:none}.footer small{color:#9ec0bc}.dash{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px}.stat{padding:16px;border-radius:15px;background:var(--card);border:1px solid var(--border)}.stat strong{font-size:1.45rem;display:block}.progress{height:10px;background:var(--border);border-radius:99px;overflow:hidden}.progress i{display:block;height:100%;background:var(--teal);width:0;transition:width .3s}.favorite{position:absolute;right:12px;top:12px;border:0;background:var(--mint);color:var(--teal);border-radius:50%;width:34px;height:34px;cursor:pointer}.toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%) translateY(20px);opacity:0;background:#092d2c;color:white;padding:10px 14px;border-radius:10px;z-index:100;transition:.2s}.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}.search-results{margin-top:10px;display:grid;gap:8px}.search-results a{background:rgba(255,255,255,.12);padding:9px 12px;border-radius:10px;text-decoration:none;color:white}.timer{font-size:clamp(3rem,10vw,6rem);font-weight:900;text-align:center;letter-spacing:2px}.center{text-align:center}.lang{font-size:.78rem}.hidden{display:none!important}
@keyframes float{50%{transform:translateY(-5px) rotate(2deg)}}@keyframes drift{50%{transform:translate(20px,12px)}}@keyframes pop{0%{transform:scale(.98);opacity:.3}100%{transform:scale(1);opacity:1}}
@media(max-width:700px){.navlinks a{display:none}.hero{padding:42px 16px}.wrap{padding:22px 14px}.footer-inner{grid-template-columns:1fr}.search{flex-direction:column}.tool-head{align-items:flex-start}.formgrid{grid-template-columns:1fr}}