:root{--bg:#f5f7fb;--card:#fff;--text:#111827;--muted:#6b7280;--border:#e5e7eb;--primary:#2563eb;--primary2:#1d4ed8;--shadow:0 10px 30px rgba(0,0,0,.06)}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.5}
header{position:sticky;top:0;z-index:10;background:var(--card);border-bottom:1px solid var(--border)}
.header{max-width:1150px;margin:auto;padding:16px 20px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.logo{font-size:20px;font-weight:800;color:var(--text);text-decoration:none}.logo span{color:var(--primary)}
nav{display:flex;gap:5px;overflow:auto}nav a{white-space:nowrap;text-decoration:none;color:var(--muted);font-size:14px;padding:8px 10px;border-radius:8px}nav a:hover{background:#eff6ff;color:var(--primary)}
main{max-width:1150px;margin:auto;padding:50px 20px 80px}.hero{text-align:center;margin-bottom:38px}.hero h1{font-size:clamp(32px,5vw,52px);line-height:1.05;letter-spacing:-1.5px;margin-bottom:15px}.hero p{max-width:720px;margin:auto;color:var(--muted);font-size:17px}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:24px}.card{background:var(--card);border:1px solid var(--border);border-radius:18px;padding:26px;box-shadow:var(--shadow)}.card h2{font-size:22px;margin-bottom:5px}.sub{color:var(--muted);font-size:14px;margin-bottom:24px}
.form{display:grid;grid-template-columns:1fr 1fr;gap:16px}.field{display:flex;flex-direction:column;gap:7px}.field.full{grid-column:1/-1}label{font-size:13px;font-weight:650}
input,select{width:100%;padding:12px 13px;border:1px solid var(--border);border-radius:9px;background:var(--bg);color:var(--text);font-size:15px;outline:none}input:focus,select:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
button{border:0;background:var(--primary);color:#fff;padding:12px 18px;border-radius:9px;font-weight:700;cursor:pointer;margin-top:18px}button:hover{background:var(--primary2)}
.result{margin-top:24px;padding:20px;border-radius:12px;background:#eff6ff;border:1px solid #dbeafe}.result-label{font-size:13px;color:var(--muted)}.big{font-size:32px;font-weight:850;color:var(--primary)}
.results{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:16px}.metric{background:var(--card);border:1px solid var(--border);border-radius:9px;padding:13px}.metric strong{display:block;font-size:18px}.metric span{font-size:12px;color:var(--muted)}
canvas{display:block;width:100%;height:300px;margin-top:24px}
aside .card{margin-bottom:18px}.side-links{list-style:none}.side-links li{margin:8px 0}.side-links a{color:var(--primary);text-decoration:none}
.content{margin-top:26px}.content h2{font-size:24px;margin:26px 0 10px}.content p{color:var(--muted);margin-bottom:12px}.faq details{border:1px solid var(--border);border-radius:10px;padding:14px 16px;margin:9px 0;background:var(--card)}summary{cursor:pointer;font-weight:650}.faq p{margin-top:10px;color:var(--muted)}
footer{border-top:1px solid var(--border);padding:28px 20px;text-align:center;color:var(--muted);font-size:13px}
@media(max-width:850px){nav{display:none}.layout{grid-template-columns:1fr}.form{grid-template-columns:1fr}.results{grid-template-columns:1fr}main{padding-top:32px}}