#calc-pane-hvac{
#hvacMegaCalc{max-width:1180px;margin:28px auto;padding:14px;font-family:Inter,Arial,sans-serif;color:#111827}
.hmc-wrap{background:#f4f6f8;border-radius:24px;padding:18px}
.hmc-head{background:#111827;color:#fff;border-radius:20px;padding:24px;margin-bottom:18px}
.hmc-head h2{margin:0 0 8px;font-size:30px}
.hmc-head p{margin:0;color:#cbd5e1;font-size:14px;line-height:1.45}
.hmc-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:18px}
.hmc-cardbtn{
background:#fff;
border:1px solid #d9e1ea;
border-radius:14px;
padding:12px;
cursor:pointer;
transition:.2s;
display:flex;
flex-direction:column;
gap:5px;
min-height:92px;
justify-content:flex-start
}
.hmc-cardbtn:hover{background:#eef6ff;transform:translateY(-1px)}
.hmc-cardbtn.active{background:#111827;border-color:#111827;color:#fff}
.hmc-cardbtn.active .hmc-card-desc,.hmc-cardbtn.active .hmc-card-data{color:#cbd5e1}
.hmc-card-title{font-size:14px;font-weight:900;line-height:1.25}
.hmc-card-desc{font-size:12px;line-height:1.35;color:#475569}
.hmc-card-data{font-size:11px;line-height:1.35;color:#64748b}
.hmc-sections{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 16px}
.hmc-sectionbtn{
background:#fff;
border:1px solid #d9e1ea;
border-radius:999px;
padding:10px 15px;
cursor:pointer;
transition:.2s;
font-size:14px;
font-weight:900;
color:#111827;
width:auto;
margin-top:0
}
.hmc-sectionbtn:hover{background:#eef6ff;transform:translateY(-1px)}
.hmc-sectionbtn.active{background:#111827;border-color:#111827;color:#fff}
.hmc-section-title{font-size:18px;font-weight:900;margin:8px 0 12px;color:#111827}
.hmc-grid{display:grid;grid-template-columns:420px 1fr;gap:24px}
.hmc-panel,.hmc-result{background:#fff;border:1px solid #d9e1ea;border-radius:22px;padding:24px}
label{display:block;font-weight:800;margin-top:12px;margin-bottom:6px}
select,input{width:100%;box-sizing:border-box;padding:13px;border:1px solid #d7dee8;border-radius:12px;font-size:16px;background:#fff}
input[readonly]{background:#eef2f7;color:#475569}
button{width:100%;margin-top:18px;padding:15px;border:0;border-radius:14px;background:#111827;color:#fff;font-size:17px;font-weight:900;cursor:pointer}
.hmc-big{font-size:38px;font-weight:900;margin:10px 0;color:#0f172a}
.hmc-note{background:#eef6ff;border-radius:16px;padding:16px;margin-top:16px;color:#334155;line-height:1.5}
.hmc-table{width:100%;border-collapse:collapse;margin-top:18px;font-size:15px}
.hmc-table th,.hmc-table td{border-bottom:1px solid #e5e7eb;padding:10px;text-align:left}
.hmc-row{display:grid;grid-template-columns:1fr 1fr 70px;gap:10px;align-items:end;margin-top:12px}
.hmc-small{background:#e5e7eb;color:#111827;margin-top:10px}
.hmc-line-volume{grid-column:1/4;background:#f8fafc;border-radius:12px;padding:10px;color:#475569;font-weight:700}
.hmc-check{display:flex;align-items:center;gap:10px;margin-top:14px;font-weight:800}
.hmc-check input{width:18px;height:18px;margin:0;flex:0 0 18px}

.hmc-info{background:#fff;border:1px solid #d9e1ea;border-radius:22px;padding:24px;margin-top:24px;line-height:1.55}
.hmc-info h3{margin:0 0 12px;font-size:24px;color:#111827}
.hmc-info p{color:#475569;margin:8px 0}
.hmc-info ul{margin:8px 0 0 20px;color:#475569}
.hmc-info code{background:#f8fafc;border-radius:6px;padding:2px 6px}
@media(max-width:900px){.hmc-sectionbtn{font-size:13px;padding:9px 12px}.hmc-cards{grid-template-columns:1fr 1fr}.hmc-cardbtn{min-height:auto}.hmc-grid{grid-template-columns:1fr}.hmc-head h2{font-size:25px}.hmc-row{grid-template-columns:1fr}.hmc-line-volume{grid-column:1}}
}
#calc-pane-speed{
#zk-air-speed-tool{
  max-width:1200px;
  margin:40px auto;
  padding:20px;
  font-family:Inter,Arial,sans-serif;
  color:#111;
}
.zk-tool-card{
  background:linear-gradient(135deg,#0f172a,#111827);
  color:#fff;
  border-radius:28px;
  padding:38px;
  box-shadow:0 24px 60px rgba(0,0,0,.18);
}
.zk-tool-card h2{
  font-size:36px;
  margin:0 0 12px;
}
.zk-tool-card p{
  color:#b8c2d6;
  margin:0 0 28px;
}
.zk-controls{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:18px;
}
.zk-field label{
  display:block;
  font-weight:700;
  margin-bottom:8px;
}
.zk-field input,.zk-field select{
  width:100%;
  box-sizing:border-box;
  padding:15px 16px;
  border-radius:14px;
  border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.08);
  color:#fff;
  font-size:18px;
  outline:none;
}
.zk-field select option{
  color:#111;
}
.zk-full{
  grid-column:1/-1;
}
.zk-button{
  width:100%;
  padding:17px;
  border:none;
  border-radius:16px;
  background:#38bdf8;
  color:#07111f;
  font-size:18px;
  font-weight:800;
  cursor:pointer;
}
.zk-result{
  display:none;
  margin-top:24px;
  padding:24px;
  border-radius:20px;
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.12);
}
.zk-result-value{
  font-size:44px;
  font-weight:900;
  margin:8px 0;
}
.zk-info{
  margin:26px 0;
  padding:20px;
  border-radius:20px;
  background:#f3f6f9;
  line-height:1.55;
}
.zk-legend{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin:20px 0 10px;
}
.zk-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:9px 13px;
  border-radius:999px;
  font-size:14px;
  font-weight:700;
}
.zk-low-badge{background:#e0f2fe;color:#075985;}
.zk-ok-badge{background:#dcfce7;color:#166534;}
.zk-high-badge{background:#fee2e2;color:#991b1b;}
.zk-dot{
  width:10px;
  height:10px;
  border-radius:50%;
  display:inline-block;
}
.zk-low-dot{background:#0ea5e9;}
.zk-ok-dot{background:#22c55e;}
.zk-high-dot{background:#ef4444;}
.zk-title{
  font-size:28px;
  font-weight:900;
  margin:38px 0 16px;
}
.zk-table-wrap{
  overflow:auto;
  border:1px solid #d8dee8;
  border-radius:18px;
  background:#fff;
  box-shadow:0 12px 30px rgba(15,23,42,.08);
  margin-bottom:36px;
}
.zk-table{
  width:100%;
  min-width:1050px;
  border-collapse:collapse;
  font-size:13px;
}
.zk-table th,.zk-table td{
  border:1px solid #e5eaf0;
  padding:9px;
  text-align:center;
  white-space:nowrap;
}
.zk-table th{
  background:#eef3f8;
  color:#1f2937;
  font-weight:900;
}
.zk-table .head{
  background:#e5ebf1;
  font-weight:900;
  color:#111827;
}
.zk-low{
  background:#eff6ff;
  color:#1d4ed8;
  font-weight:800;
}
.zk-ok{
  background:#ecfdf5;
  color:#15803d;
  font-weight:900;
}
.zk-high{
  background:#fff1f2;
  color:#dc2626;
  font-weight:900;
}
@media(max-width:760px){
  .zk-controls{grid-template-columns:1fr;}
  .zk-tool-card{padding:24px;}
  .zk-tool-card h2{font-size:28px;}
}
}
#calc-pane-area{
#zkVentluxCalc{max-width:1180px;margin:40px auto;padding:20px;font-family:Inter,Arial,sans-serif;color:#111827}
.zk-wrap{background:#f4f6f8;border-radius:28px;padding:28px}
.zk-head{background:#0f172a;color:#fff;border-radius:24px;padding:32px;margin-bottom:24px}
.zk-head h2{margin:0 0 10px;font-size:34px}.zk-head p{margin:0;color:#cbd5e1}
.zk-grid{display:grid;grid-template-columns:430px 520px;gap:24px;justify-content:center;align-items:start}
.zk-card,.zk-img{background:#fff;border:1px solid #d9e1ea;border-radius:22px;padding:24px;box-shadow:0 12px 30px rgba(15,23,42,.06)}
.zk-card label{display:block;font-weight:800;margin-top:12px;margin-bottom:6px}
.zk-card select,.zk-card input{width:100%;box-sizing:border-box;padding:13px;border:1px solid #d7dee8;border-radius:12px;font-size:16px}
.zk-card button{width:100%;margin-top:18px;padding:15px;border:0;border-radius:14px;background:#0f172a;color:#fff;font-size:17px;font-weight:900;cursor:pointer}
.zk-result{margin-top:18px;background:#eef6ff;border-radius:16px;padding:18px}.zk-result span{color:#64748b}.zk-result b{display:block;font-size:34px;color:#0f172a;margin-top:4px}
.zk-formula{margin-top:14px;background:#f8fafc;border-radius:14px;padding:14px;color:#475569;font-size:14px;line-height:1.45}
.zk-img{min-height:360px;display:flex;align-items:center;justify-content:center}.zk-img img{max-width:430px;width:100%;max-height:340px;object-fit:contain}
.zk-placeholder{width:100%;height:300px;border:2px dashed #cbd5e1;border-radius:18px;display:flex;align-items:center;justify-content:center;text-align:center;color:#64748b;font-weight:700;padding:20px;box-sizing:border-box}
@media(max-width:900px){.zk-grid{grid-template-columns:1fr}.zk-head h2{font-size:27px}}
}