/* Shared public antenna calculator layout. Colours come from the site theme. */
#antenna-calculator{
  --bg:var(--page-bg);--surface:var(--panel-bg);--line:var(--border);
  --accent:var(--focus);--linkc:var(--link);
  box-sizing:border-box;container-type:inline-size;
  max-width:1480px;margin:auto;padding:24px 40px;
  background:var(--bg);color:var(--text);font:16px/1.5 system-ui,sans-serif
}
#antenna-calculator *{box-sizing:border-box}
#antenna-calculator a{color:var(--linkc)}
#antenna-calculator .title{display:flex;align-items:center;gap:18px;margin-top:24px}
#antenna-calculator h1{font-size:clamp(30px,4vw,48px);font-weight:550;letter-spacing:-.04em;margin:0}
#antenna-calculator h2{margin:0;font-size:24px;font-weight:550}
#antenna-calculator .version{font:14px ui-monospace,monospace;border:1px solid var(--line);padding:4px 8px}
#antenna-calculator .intro{color:var(--muted);margin:8px 0 26px}
#antenna-calculator .form-grid{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  border:1px solid var(--line);background:var(--surface)
}
#antenna-calculator fieldset{min-width:0;margin:0;border:0;border-right:1px solid var(--line);padding:22px}
#antenna-calculator fieldset:last-child{border-right:0}
#antenna-calculator legend{display:block;float:none;width:100%;padding:0;margin:0 0 18px;font-weight:600}
#antenna-calculator legend span{color:var(--linkc);font:14px ui-monospace,monospace;margin-right:8px}
#antenna-calculator label{display:block;font-size:14px;margin:12px 0 6px}
#antenna-calculator small{font-size:12px;color:var(--muted)}
#antenna-calculator input,#antenna-calculator select{
  min-width:0;width:100%;font:16px system-ui,sans-serif;
  border:1px solid var(--border);background:var(--input-bg);color:var(--text);
  padding:10px;border-radius:3px
}
#antenna-calculator input[type=range]{padding:6px 0;accent-color:var(--linkc)}
#antenna-calculator input:focus-visible,#antenna-calculator select:focus-visible,#antenna-calculator button:focus-visible,
#antenna-calculator summary:focus-visible,#antenna-calculator a:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
#antenna-calculator .help{font-size:13px;color:var(--muted);margin:9px 0}
#antenna-calculator .form-footer{display:flex;align-items:center;justify-content:flex-end;gap:12px;padding:16px 0}
#antenna-calculator button{
  font:600 14px system-ui,sans-serif;cursor:pointer;border:1px solid var(--button-border);
  background:var(--button-bg);color:var(--button-text);padding:11px 18px;border-radius:3px
}
#antenna-calculator button.secondary{background:transparent;color:var(--text);border-color:var(--border)}
#antenna-calculator button:hover{filter:brightness(1.15)}
#antenna-calculator button:disabled{opacity:.5;cursor:default}
#antenna-calculator #error{margin:0 auto 0 0;color:var(--danger);font-size:14px}
#antenna-calculator .result{border-top:1px solid var(--line);margin-top:12px;padding-top:24px}
#antenna-calculator .result-header{display:flex;align-items:center;justify-content:space-between;gap:16px}
#antenna-calculator .eyebrow{color:var(--linkc);font:12px ui-monospace,monospace;letter-spacing:.12em}
#antenna-calculator .downloads{display:flex;align-items:center;flex-wrap:wrap;justify-content:flex-end;gap:10px}
#antenna-calculator .downloads label{margin:0}
#antenna-calculator .downloads select{width:auto;font-size:14px;padding:10px;max-width:230px}
#antenna-calculator .summary{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin:20px 0}
#antenna-calculator .stat{border-left:2px solid var(--line);padding-left:14px;min-width:0}
#antenna-calculator .stat strong{display:block;font:22px ui-monospace,monospace;overflow-wrap:anywhere}
#antenna-calculator .stat span{font-size:13px;color:var(--muted)}
#antenna-calculator .notice{font-size:14px;background:var(--panel-strong);color:var(--warn);border-left:3px solid var(--warn);padding:8px 12px}
#antenna-calculator .drawing-error{margin:12px 0;padding:12px 14px;border:1px solid var(--danger);border-left-width:4px;background:var(--panel-strong);color:var(--danger);font-size:14px}
#antenna-calculator .drawing-error[hidden]{display:none}
#antenna-calculator .drawing{background:var(--panel-bg);border:1px solid var(--line);overflow:auto}
#antenna-calculator .drawing:empty{display:none}
#antenna-calculator .drawing svg{display:block;width:100%;min-width:680px;height:auto}
#antenna-calculator details{border-top:1px solid var(--line);margin-top:26px;padding:16px 0}
#antenna-calculator summary{cursor:pointer;font-weight:600}
#antenna-calculator .methods{max-width:980px;color:var(--muted);font-size:14px}
#antenna-calculator .print-only{display:none!important}

@container (max-width:1050px){
  #antenna-calculator .form-grid{grid-template-columns:1fr 1fr}
  #antenna-calculator fieldset{border-bottom:1px solid var(--line)}
  #antenna-calculator fieldset:nth-child(even){border-right:0}
  #antenna-calculator fieldset:last-child{grid-column:1/-1;border-right:0;border-bottom:0}
}
@container (max-width:680px){
  #antenna-calculator{padding:16px}
  #antenna-calculator .form-grid{grid-template-columns:1fr}
  #antenna-calculator fieldset,#antenna-calculator fieldset:last-child{grid-column:auto;border-right:0;border-bottom:1px solid var(--line)}
  #antenna-calculator fieldset:last-child{border-bottom:0}
  #antenna-calculator .summary{grid-template-columns:repeat(2,minmax(0,1fr))}
  #antenna-calculator .result-header{align-items:flex-start;flex-direction:column}
  #antenna-calculator .downloads{justify-content:flex-start}
  #antenna-calculator .form-footer{flex-wrap:wrap}
  #antenna-calculator #error{flex-basis:100%}
}
@media(max-width:760px){
  #antenna-calculator{padding:16px}
  #antenna-calculator .form-grid{grid-template-columns:1fr}
}
@media print{
  @page{size:auto;margin:10mm}
  html,body{background:white!important;color:black!important;color-scheme:light}
  .site-chrome,.site-footer{display:none!important}
  main.shell{max-width:none;margin:0;padding:0}
  #antenna-calculator{padding:0;color:black}
  #antenna-calculator .title,#antenna-calculator .intro,#antenna-calculator form,#antenna-calculator .result-header,
  #antenna-calculator .summary,#antenna-calculator .notice,#antenna-calculator .drawing-error,
  #antenna-calculator details,#antenna-calculator #export-status{display:none!important}
  #antenna-calculator .result{border:0;margin:0;padding:0}
  #antenna-calculator .drawing{display:block!important;border:0;background:white;overflow:visible;break-inside:avoid}
  #antenna-calculator .drawing .screen-only{display:none!important}
  #antenna-calculator .drawing .print-only{display:block!important;width:100%;min-width:0;height:auto;max-height:260mm}
  *{print-color-adjust:exact;-webkit-print-color-adjust:exact}
}