*{box-sizing:border-box}
body{margin:0;font-family:Arial,Helvetica,sans-serif;background:#f4f6fa;color:#172033;line-height:1.5}
.wrap{max-width:1050px;margin:0 auto;padding:24px 18px 50px}
a{color:#1f5fd1}
.back{display:inline-block;margin-bottom:16px;color:#1f5fd1;text-decoration:none;font-weight:700}
header{background:#23385f;color:#fff;border-radius:12px;padding:28px 26px;margin-bottom:18px}
h1{margin:0 0 8px;font-size:32px;line-height:1.2}
header p{margin:0;color:#e5ebf7;max-width:780px}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.card{background:#fff;border:1px solid #dfe4ec;border-radius:12px;padding:22px}
h2{margin:0 0 16px;font-size:22px;color:#172033}
label{display:block;font-weight:700;margin:13px 0 6px}
input,select{width:100%;padding:11px 12px;border:1px solid #cbd3df;border-radius:8px;font:inherit;background:#fff;color:#172033}
input:focus,select:focus{outline:2px solid #b9d2ff;border-color:#3b6fd8}
input.invalid{border-color:#c62828;background:#fff7f7}
.row{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.hint{font-size:13px;color:#68758a;margin-top:5px}
.field-error{color:#c62828;font-size:13px;font-weight:700;margin-top:5px}
.field-error:empty{display:none}
button{width:100%;border:0;border-radius:8px;padding:13px 16px;background:#2864d7;color:#fff;font-size:16px;font-weight:700;cursor:pointer;margin-top:18px}
button:hover{background:#1f55bc}
.result{display:grid;gap:11px}
.main-result{background:#edf4ff;border:1px solid #c9dcff;border-radius:10px;padding:18px}
.big{font-size:36px;font-weight:800;line-height:1.05}
.unit{font-size:16px;font-weight:700}
.stats{display:grid;grid-template-columns:1fr 1fr;gap:11px}
.stat{border:1px solid #dfe4ec;border-radius:9px;padding:13px}
.stat span{font-size:14px}
.stat b{display:block;font-size:20px;margin-top:2px}
.recommendation{padding:14px;border-radius:9px;background:#edf8f1;color:#087443;font-weight:700}
.warning{padding:13px;border-radius:9px;background:#fff7e8;color:#8a5200;font-size:13px}
.article{margin-top:18px}
.article p{color:#465267}.article ul{color:#465267;padding-left:22px}.article li{margin:7px 0}.formula{background:#f7f9fc;border-left:4px solid #2864d7;padding:12px 14px;border-radius:6px;color:#172033}.article h3{margin:22px 0 7px;font-size:18px;color:#172033}
.article h2{margin-top:25px}
.links{display:flex;flex-wrap:wrap;gap:9px;margin-top:18px}
.links a{background:#fff;border:1px solid #dfe4ec;padding:9px 12px;border-radius:8px;text-decoration:none;font-weight:700}
footer{margin-top:26px;color:#68758a;font-size:13px;text-align:center}
@media(max-width:760px){.grid{grid-template-columns:1fr}.row{grid-template-columns:1fr}h1{font-size:28px}header{padding:23px 20px}.card{padding:19px}}
#autoBox{margin-top:4px;padding-top:4px}