.tec-unit-calculator{
    --tec-blue:#009EE3;
    --tec-dark:#173240;
    --tec-text:#1f2a33;
    --tec-muted:#687782;
    --tec-border:#d8e1e8;
    --tec-soft:#f4f8fb;
    --tec-green-bg:#e9fbf3;
    --tec-green-border:#a9e8ca;
    --tec-green-text:#0a6b42;
    font-family:"Segoe UI",Tahoma,sans-serif;
    width:100%;
    max-width:420px;
    margin:0 auto;
    background:#fff;
    color:var(--tec-text);
    border-radius:12px;
    padding:22px;
    box-shadow:0 8px 24px rgba(0,0,0,.08);
    box-sizing:border-box;
}
.tec-unit-calculator *{box-sizing:border-box;}
.tec-unit-header{text-align:center;margin-bottom:18px;}
.tec-unit-kicker{font-size:13px;color:var(--tec-blue);font-weight:700;letter-spacing:.02em;margin-bottom:4px;}
.tec-unit-title{font-size:18px;font-weight:700;line-height:1.25;color:var(--tec-dark);}
.tec-field{margin-bottom:12px;}
.tec-field label{display:block;font-size:13px;font-weight:700;margin-bottom:6px;color:var(--tec-text);}
.tec-field input,.tec-field select{
    width:100%;height:42px;border:1px solid var(--tec-border);border-radius:6px;background:#fff;
    padding:8px 10px;font-family:"Segoe UI",Tahoma,sans-serif;font-size:14px;color:var(--tec-text);
}
.tec-field input:focus,.tec-field select:focus{outline:none;border-color:var(--tec-blue);box-shadow:0 0 0 2px rgba(0,158,227,.12);}
.tec-grid-2{display:grid;grid-template-columns:1fr 1fr;gap:10px;}
.tec-btn{width:100%;height:44px;border:none;border-radius:6px;background:var(--tec-blue);color:#fff;font-size:15px;font-weight:700;cursor:pointer;margin:4px 0 16px;}
.tec-btn:hover{filter:brightness(.96);}
.tec-result{padding:0;margin-top:2px;}
.tec-result h3{font-size:16px;line-height:1.25;margin:0 0 12px;color:var(--tec-text);font-weight:700;}
.tec-result-main{
    background:var(--tec-green-bg);border:1px solid var(--tec-green-border);border-radius:7px;
    padding:13px 14px;color:var(--tec-green-text);font-size:18px;line-height:1.35;font-weight:700;
}
.tec-result-main span:first-child{font-variant-numeric:tabular-nums;}
.tec-nearby{margin-top:14px;background:var(--tec-soft);border:1px solid var(--tec-border);border-radius:7px;padding:12px 14px;}
.tec-nearby h4{font-size:14px;margin:0 0 10px;color:var(--tec-text);font-weight:700;}
.tec-nearby-row{display:flex;justify-content:space-between;gap:14px;font-size:13px;line-height:1.45;padding:4px 0;border-bottom:1px solid rgba(0,0,0,.06);}
.tec-nearby-row:last-child{border-bottom:none;}
.tec-nearby-value{font-weight:700;text-align:right;font-variant-numeric:tabular-nums;}
.tec-note{font-size:12px;line-height:1.45;color:var(--tec-muted);margin:14px 0 0;}
@media(max-width:480px){.tec-unit-calculator{padding:18px}.tec-grid-2{grid-template-columns:1fr}.tec-result-main{font-size:16px}}
.tec-density-row{display:flex;align-items:center;gap:8px;}
.tec-density-row input{flex:1;}
.tec-density-row span{font-size:13px;font-weight:700;color:var(--tec-text);white-space:nowrap;}
.tec-help{display:block;font-size:12px;line-height:1.35;color:var(--tec-muted);margin-top:5px;}
.tec-info-row{font-size:12.5px;line-height:1.45;color:var(--tec-muted);padding:0 0 8px;margin-bottom:6px;border-bottom:1px solid rgba(0,0,0,.06);}
.tec-info-row.tec-warn{color:#805200;background:#fff6da;border:1px solid #efd078;border-radius:6px;padding:9px 10px;margin-bottom:0;}

.tec-header-image{display:block;width:100%;max-width:420px;margin:0 auto 18px;height:auto;}