:root{
  --blue:#0066FF;--blue-light:#3385FF;--blue-dim:rgba(0,102,255,0.13);
  --navy:#0A0F2C;--navy-mid:#111936;--navy-card:#141B3A;--navy-border:#1E2B52;
  --muted:#8A9CC2;--text:#C8D4F0;--green:#00E676;--red:#FF3D57;--amber:#FFB300;
  --teal:#00BCD4;--purple:#CE93D8;
  --font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;--mono:'JetBrains Mono',monospace;
  --radius:14px;--cat:#0066FF;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--navy);color:var(--text);min-height:100vh}
a{color:inherit;text-decoration:none}
::-webkit-scrollbar{width:5px}::-webkit-scrollbar-track{background:var(--navy-mid)}
::-webkit-scrollbar-thumb{background:var(--navy-border);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--blue)}
#nav{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(10,15,44,0.96);
  backdrop-filter:blur(20px);border-bottom:1px solid var(--navy-border);
  height:60px;display:flex;align-items:center;justify-content:center;padding:0;box-sizing:border-box}
.logo{display:flex;align-items:center;gap:10px;cursor:pointer}
.logo-icon{width:34px;height:34px;background:var(--blue);border-radius:9px;display:grid;
  place-items:center;font-size:16px;font-weight:700;color:#fff}
.logo-name{font-size:17px;font-weight:700;color:#fff;letter-spacing:-0.5px}
.logo-tag{font-size:10px;color:var(--muted)}
.nav-spacer{flex:1}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-link{padding:6px 13px;border-radius:8px;font-size:12.5px;font-weight:500;
  color:var(--muted);border:none;background:none;cursor:pointer;transition:0.2s}
.nav-link:hover{color:#fff;background:var(--navy-card)}
.nav-link.primary{background:var(--blue);color:#fff;font-weight:600}
.nav-link.primary:hover{background:var(--blue-light)}
#page{padding-top:60px}
.calc-hero{background:none;border-bottom:none;padding:16px 0 24px}
.hero-inner{width:100%;max-width:none;margin:0;padding:0}
.breadcrumb{display:flex;align-items:center;gap:6px;font-size:11px;color:var(--muted);margin-bottom:14px;flex-wrap:wrap}
.breadcrumb a{color:var(--muted);transition:0.2s}.breadcrumb a:hover{color:var(--blue)}
.breadcrumb-sep{opacity:0.4}
.cat-badge{display:inline-flex;align-items:center;gap:5px;background:rgba(0,0,0,0.25);
  border:1px solid var(--cat);color:var(--cat);border-radius:20px;padding:3px 10px;
  font-size:10px;font-weight:700;letter-spacing:0.5px;margin-bottom:10px}
.hero-title{font-size:28px;font-weight:700;color:#fff;letter-spacing:-0.5px;margin-bottom:8px;line-height:1.2}
.hero-sub{font-size:13px;color:var(--muted);line-height:1.6;max-width:680px;margin-bottom:16px}
.hero-badges{display:flex;gap:8px;flex-wrap:wrap}
.hb{display:inline-flex;align-items:center;gap:4px;background:var(--navy);
  border:1px solid var(--navy-border);border-radius:8px;padding:4px 10px;font-size:11px;color:var(--muted)}
.hb span{color:var(--text)}
.main-grid{width:100%;max-width:none;margin:0;padding:24px 0 60px;
  display:grid;grid-template-columns:minmax(0,1fr);gap:28px;align-items:start}
@media(max-width:860px){.main-grid{grid-template-columns:1fr;padding:20px 16px 40px}}
.calc-widget{background:var(--navy-card);border:1px solid var(--navy-border);
  border-radius:var(--radius);overflow:hidden;position:sticky;top:76px}
.cw-header{background:linear-gradient(135deg,rgba(0,102,255,0.15),rgba(0,102,255,0.05));
  border-bottom:1px solid var(--navy-border);padding:14px 18px}
.cw-title{font-size:14px;font-weight:700;color:#fff;display:flex;align-items:center;gap:8px}
.cw-ref{font-size:10px;color:var(--blue);margin-top:3px}
.cw-body{padding:16px 18px}
.inp-row{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:10px}
.input-group{display:flex;flex-direction:column;gap:5px}
.input-label{font-size:11px;font-weight:600;color:var(--muted);letter-spacing:0.3px;text-transform:uppercase}
.inp{background:var(--navy-mid);border:1px solid var(--navy-border);border-radius:8px;
  padding:9px 11px;font-family:var(--font);font-size:13px;color:var(--text);width:100%;transition:0.2s}
.inp:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(0,102,255,0.15)}
.input-group.full,.inp-row.single .input-group{grid-column:1/-1}
.err-msg{font-size:10px;color:var(--red);min-height:14px}
#modal-results{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:14px}
.result-card{background:var(--navy-mid);border:1px solid var(--navy-border);border-radius:10px;padding:11px 13px}
.result-label{font-size:10px;color:var(--muted);font-weight:600;letter-spacing:0.3px;margin-bottom:3px}
.result-value{font-size:20px;font-weight:700;color:#fff;line-height:1}
.result-unit{font-size:10px;color:var(--muted);margin-top:2px}
.result-imperial{font-size:10px;color:var(--teal);margin-top:2px;display:none}
.result-imperial.show{display:block}
.result-badge{font-size:10px;font-weight:700;padding:2px 7px;border-radius:5px;display:inline-block;margin-top:4px}
.badge-pass{background:rgba(0,230,118,0.15);color:var(--green)}
.badge-fail{background:rgba(255,61,87,0.15);color:var(--red)}
.badge-warn{background:rgba(255,179,0,0.15);color:var(--amber)}
.formula-box{grid-column:1/-1;background:rgba(0,102,255,0.06);
  border:1px solid rgba(0,102,255,0.2);border-radius:8px;padding:10px 13px;margin-top:4px}
.formula-box strong{font-size:11px;color:var(--blue);display:block;margin-bottom:5px}
.f-eq{font-family:var(--mono);font-size:11px;color:#fff;display:block;margin-bottom:3px}
.f-step{font-family:var(--mono);font-size:10px;color:var(--muted);display:block}
.how-btn{background:none;border:1px solid var(--navy-border);border-radius:6px;
  padding:5px 10px;font-size:11px;color:var(--muted);cursor:pointer;font-family:var(--font);
  transition:0.2s;margin-bottom:10px}
.how-btn:hover{border-color:var(--blue);color:var(--blue)}
.how-panel{font-size:12px;color:var(--muted);line-height:1.6;background:var(--navy-mid);
  border-radius:8px;padding:10px 12px;margin-bottom:12px;display:none}
.how-panel.open{display:block}
.load-header{display:grid;grid-template-columns:1.5fr 0.8fr 0.6fr 0.7fr auto;
  gap:6px;font-size:10px;font-weight:700;color:var(--muted);margin-bottom:6px;text-transform:uppercase}
.load-row{display:grid;grid-template-columns:1.5fr 0.8fr 0.6fr 0.7fr auto;
  gap:6px;margin-bottom:6px;align-items:center}
.load-row .inp{padding:8px 8px;font-size:13px}
.remove-row{background:rgba(255,61,87,0.15);border:1px solid rgba(255,61,87,0.3);
  color:var(--red);border-radius:6px;padding:5px 8px;cursor:pointer;font-size:13px;font-family:var(--font)}
.add-row-btn{background:rgba(0,102,255,0.1);border:1px solid rgba(0,102,255,0.3);
  color:var(--blue);border-radius:6px;padding:6px 12px;cursor:pointer;font-size:11px;
  font-weight:600;font-family:var(--font);margin-top:4px}
.calc-actions{display:flex;gap:8px;margin-top:14px}
.calc-actions button{flex:1;padding:9px;border-radius:8px;font-size:12px;font-weight:600;
  cursor:pointer;border:none;font-family:var(--font);transition:0.2s}
.btn-pdf{background:var(--blue);color:#fff}.btn-pdf:hover{background:var(--blue-light)}
.btn-share{background:var(--navy-mid);color:var(--muted);border:1px solid var(--navy-border)}
.btn-share:hover{color:#fff;border-color:var(--blue)}
.guest-usage-panel{background:rgba(0,102,255,0.08);border:1px solid rgba(0,102,255,0.2);border-radius:12px;padding:14px 16px;margin-bottom:14px;display:flex;flex-wrap:wrap;align-items:center;gap:10px}
.guest-usage-text{font-size:13px;color:var(--text);flex:1;min-width:220px}
.guest-lock-card{grid-column:1/-1;background:rgba(255,61,87,0.08);border:1px solid rgba(255,61,87,0.2);border-radius:14px;padding:22px;display:flex;flex-direction:column;gap:12px}
.guest-lock-card h3{margin:0;font-size:16px;color:#fff}
.guest-lock-card p{margin:0;color:var(--muted);font-size:13px;line-height:1.6}
.section{margin-bottom:28px}
.section-title{font-size:17px;font-weight:700;color:#fff;margin-bottom:12px;
  padding-bottom:8px;border-bottom:1px solid var(--navy-border);
  display:flex;align-items:center;gap:8px}
.si{width:24px;height:24px;border-radius:6px;background:rgba(0,102,255,0.12);
  display:grid;place-items:center;font-size:13px;flex-shrink:0}
.prose{font-size:13.5px;color:var(--muted);line-height:1.75}
.prose strong{color:var(--text)}
.formula-display{background:var(--navy-card);border:1px solid var(--navy-border);border-radius:10px;padding:16px 18px}
.formula-display h4{font-size:12px;color:var(--blue);font-weight:700;letter-spacing:0.5px;
  margin-bottom:10px;text-transform:uppercase}
.formula-display pre{font-family:var(--mono);font-size:11.5px;color:var(--text);
  line-height:1.8;white-space:pre-wrap;word-break:break-word}
.faq-item{border:1px solid var(--navy-border);border-radius:10px;margin-bottom:8px;overflow:hidden}
.faq-q{padding:13px 16px;cursor:pointer;font-size:13px;font-weight:600;color:#fff;
  display:flex;justify-content:space-between;align-items:center;gap:10px;
  background:var(--navy-card);transition:0.2s;user-select:none}
.faq-q:hover{background:rgba(0,102,255,0.06)}
.faq-chevron{color:var(--blue);font-size:16px;flex-shrink:0;transition:transform 0.2s}
.faq-a{display:none;padding:13px 16px;font-size:12.5px;color:var(--muted);
  line-height:1.75;background:var(--navy-mid);border-top:1px solid var(--navy-border)}
.faq-item.open .faq-a{display:block}
.faq-item.open .faq-chevron{transform:rotate(45deg)}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
@media(max-width:480px){.related-grid{grid-template-columns:1fr 1fr}}
.related-card{background:var(--navy-card);border:1px solid var(--navy-border);
  border-radius:10px;padding:12px;transition:0.2s;display:block}
.related-card:hover{border-color:var(--blue);transform:translateY(-2px)}
.rc-icon{font-size:20px;margin-bottom:6px}
.rc-name{font-size:12px;font-weight:600;color:#fff;line-height:1.3}
.cta-box{background:linear-gradient(135deg,rgba(0,102,255,0.1),rgba(0,188,212,0.05));
  border:1px solid rgba(0,102,255,0.25);border-radius:12px;padding:20px;margin-bottom:28px}
.cta-box h3{font-size:15px;font-weight:700;color:#fff;margin-bottom:6px}
.cta-box p{font-size:12px;color:var(--muted);line-height:1.6;margin-bottom:12px}
.cta-btn{display:inline-block;background:var(--blue);color:#fff;font-weight:700;
  font-size:12px;padding:8px 18px;border-radius:8px;transition:0.2s}
.cta-btn:hover{background:var(--blue-light)}
#footer{background:var(--navy-mid);border-top:1px solid var(--navy-border);
  padding:24px;text-align:center;font-size:12px;color:var(--muted)}
.footer-links{display:flex;justify-content:center;gap:16px;margin-bottom:8px;flex-wrap:wrap}
.footer-links a:hover{color:var(--blue)}
@media(max-width:600px){
  .hero-title{font-size:22px}
  .inp-row{grid-template-columns:1fr}
  #modal-results{grid-template-columns:1fr}
  .calc-widget{position:static}
}

/* ══════════ MEPQD-RESTYLE : hero calculator + content below ══════════ */
.calc-hero{padding:16px 0 24px}
.hero-sub{margin-bottom:14px}
.hero-calc{margin-top:10px}

.calc-widget{position:static;background:var(--navy-mid);border:1px solid var(--navy-border);
  border-radius:16px;overflow:hidden;box-shadow:0 4px 14px rgba(0,0,0,0.10)}
.cw-header{display:flex;align-items:center;gap:12px;padding:16px 20px;
  background:linear-gradient(135deg,rgba(0,102,255,0.18),rgba(0,102,255,0.04));
  border-bottom:1px solid var(--navy-border)}
.cw-icon{width:38px;height:38px;border-radius:10px;display:grid;place-items:center;font-size:19px;
  flex-shrink:0;background:var(--blue-dim);border:1px solid rgba(0,102,255,0.32)}
.cw-titlewrap{flex:1;min-width:0}
.cw-title{font-size:16.5px;font-weight:700;color:#fff;letter-spacing:-0.2px;line-height:1.25}
.cw-ref{font-size:11px;color:var(--muted);margin-top:3px}
.cw-catpill{display:inline-flex;align-items:center;gap:5px;padding:5px 12px;border-radius:20px;
  font-size:10px;font-weight:700;letter-spacing:0.7px;text-transform:uppercase;flex-shrink:0;
  background:rgba(0,102,255,0.2);color:var(--blue-light);
  border:1px solid rgba(0,102,255,0.4);white-space:nowrap}
.cw-desc{padding:11px 20px;background:var(--blue-dim);border-bottom:1px solid var(--navy-border);
  font-size:12.5px;color:var(--text);line-height:1.55}

.cw-body{padding:16px;background:var(--navy)}
.cw-split{display:flex;gap:16px;align-items:flex-start}
.cw-col{background:var(--navy-mid);border:1px solid var(--navy-border);
  border-radius:12px;padding:16px 18px}
.cw-col-inputs{flex:1;min-width:0}
.cw-col-results{width:390px;flex-shrink:0}

.panel-label{display:flex;align-items:center;gap:8px;font-size:10.5px;font-weight:700;
  letter-spacing:1.4px;text-transform:uppercase;color:var(--muted);
  margin-bottom:13px;padding-bottom:10px;border-bottom:1px solid var(--navy-border)}
.panel-label::before{content:'';width:3px;height:13px;border-radius:2px;background:var(--blue)}

/* inputs */
.input-label{display:flex;align-items:center;justify-content:space-between;gap:8px;
  font-size:11.5px;font-weight:600;color:var(--text);letter-spacing:0;text-transform:none}
.unit-badge{font-family:var(--mono);font-size:10px;font-weight:600;color:var(--blue-light);
  background:var(--blue-dim);border:1px solid rgba(0,102,255,0.28);
  padding:2px 7px;border-radius:5px;flex-shrink:0;white-space:nowrap}
.inp{background:var(--navy-card);border-radius:9px;padding:10px 12px;font-size:13.5px;color:#fff}
.inp::placeholder{color:#5A6B94;font-style:italic}
.inp:hover{border-color:#2A3A66}
.inp:focus{background:var(--navy)}
.inp-row{gap:12px;margin-bottom:12px}

/* segmented pills */
.seg-host{display:none!important}
.seg-group{display:flex;flex-wrap:wrap;gap:6px}
.seg-btn{flex:1 1 auto;min-width:70px;padding:9px 12px;border-radius:8px;
  border:1px solid var(--navy-border);background:var(--navy-card);color:var(--muted);
  font-family:var(--font);font-size:12px;font-weight:600;cursor:pointer;
  transition:0.2s;white-space:nowrap;text-align:center}
.seg-btn:hover{color:#fff;border-color:rgba(0,102,255,0.5)}
.seg-btn.active{background:var(--blue-dim);border-color:var(--blue);color:var(--blue-light)}

.calc-run-btn{display:flex;align-items:center;justify-content:center;gap:9px;width:100%;
  margin-top:18px;padding:14px 18px;border:none;border-radius:11px;cursor:pointer;
  background:linear-gradient(135deg,var(--blue),#0047CC);color:#fff;
  font-family:var(--font);font-size:14px;font-weight:700;letter-spacing:0.2px;
  transition:0.2s;box-shadow:0 6px 20px rgba(0,102,255,0.28)}
.calc-run-btn:hover{transform:translateY(-1px);box-shadow:0 10px 26px rgba(0,102,255,0.42)}
.calc-run-btn:active{transform:translateY(0)}

/* results */
#modal-results{grid-template-columns:1fr;margin-top:0;gap:9px}
.results-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:13px;padding:34px 20px;text-align:center;min-height:210px;
  border:1px dashed var(--navy-border);border-radius:11px}
.results-empty svg{width:42px;height:42px;color:var(--navy-border);stroke-width:1.5}
.results-empty p{font-size:12.5px;color:var(--muted);line-height:1.65;margin:0}
.result-card{background:var(--navy-card);border-radius:10px;padding:12px 14px}
.result-value{font-size:22px}

/* content sections now run full width below the hero */
.main-grid{grid-template-columns:minmax(0,1fr);padding:24px 0 60px;width:100%;max-width:none;margin:0}
.prose{max-width:none}
.formula-display{max-width:none}
.faq-item{max-width:none}

@media(max-width:960px){
  .cw-split{flex-direction:column}
  .cw-col-results{width:100%}
  .cw-col{width:100%}
}
@media(max-width:600px){
  .calc-hero{padding:20px 14px 26px}
  .cw-body{padding:10px}
  .cw-split{gap:10px}
  .cw-col{padding:14px 15px}
  .cw-header{padding:14px 15px}
  .cw-catpill{display:none}
  .seg-btn{min-width:60px;padding:8px 10px;font-size:11.5px}
  .calc-run-btn{padding:13px 16px;font-size:13px}
  .main-grid{padding:24px 14px 40px}
}
.ce-table{width:100%;border-collapse:collapse;margin:14px 0;font-size:12.5px}.ce-table th,.ce-table td{border:1px solid var(--navy-border);padding:7px 10px;text-align:left}.ce-table th{background:var(--navy-card);color:var(--text);font-weight:700}.ce-table td{color:var(--muted)}.ce-table tr:hover td{color:var(--text)}.prose h3{font-size:14px;color:#fff;margin:18px 0 8px;font-weight:700}

/* ═══ 3-SECTION CALC WIDGET ═══ */
.cw-split{display:flex!important;gap:14px!important;align-items:flex-start!important}
.cw-col-inputs{flex:1 1 0!important;min-width:0!important;background:var(--navy-mid)!important;border:1px solid var(--navy-border)!important;border-radius:12px!important;padding:16px 18px!important}
.cw-col-results{flex:0 0 310px!important;width:310px!important;min-width:260px!important;max-width:330px!important;background:var(--navy-mid)!important;border:1px solid var(--navy-border)!important;border-radius:12px!important;padding:16px!important;display:flex!important;flex-direction:column!important;gap:10px!important}
.cw-col-results #modal-results .formula-box{display:none!important} /* Displayed in Section 3 */

.cw-col-intel{flex:1.25!important;min-width:320px!important;background:var(--navy-mid)!important;border:1px solid var(--navy-border)!important;border-radius:12px!important;padding:16px!important;display:flex!important;flex-direction:column!important;gap:12px!important}

.intel-section{background:rgba(10,15,44,0.5);border:1px solid var(--navy-border);border-radius:10px;padding:12px 14px;display:flex;flex-direction:column;gap:9px}
body.light-mode .intel-section{background:#f8faff;border-color:var(--navy-border)}
.intel-sec-header{display:flex;align-items:center;justify-content:space-between;gap:8px;padding-bottom:7px;border-bottom:1px solid rgba(255,255,255,0.06)}
body.light-mode .intel-sec-header{border-bottom-color:rgba(0,0,0,0.08)}
.intel-sec-title{display:flex;align-items:center;gap:7px;font-size:11px;font-weight:700;letter-spacing:0.8px;text-transform:uppercase;color:var(--text)}
.intel-sec-icon{font-size:13px}
.intel-badge{font-size:9.5px;font-weight:700;padding:2px 8px;border-radius:10px;letter-spacing:0.5px}
.intel-badge.badge-pass{background:rgba(16,185,129,0.15);color:#10B981;border:1px solid rgba(16,185,129,0.35)}
.intel-badge.badge-warn{background:rgba(245,158,11,0.18);color:#F59E0B;border:1px solid rgba(245,158,11,0.4)}
.intel-badge.badge-ref{background:var(--blue-dim);color:var(--blue-light);border:1px solid rgba(0,102,255,0.35)}

.intel-alert-box.alert-pass{background:rgba(16,185,129,0.08);border:1px solid rgba(16,185,129,0.22);border-radius:8px;padding:9px 12px}
.intel-alert-box.alert-warning{background:rgba(245,158,11,0.1);border:1px solid rgba(245,158,11,0.35);border-radius:8px;padding:9px 12px}
.intel-alert-title{font-size:11.5px;font-weight:700;margin-bottom:3px;color:#10B981}
.intel-alert-box.alert-warning .intel-alert-title{color:#F59E0B}
.intel-alert-desc{font-size:11px;color:var(--text);line-height:1.45;margin:0}
.intel-alert-subtext{font-size:10px;color:var(--muted);margin-top:3px}
.intel-alert-list{margin:4px 0 5px;padding-left:17px;font-size:11px;color:var(--text);line-height:1.45}
.intel-alert-list li{margin:2px 0}
.intel-alert-tip{font-size:10px;color:#F59E0B;font-style:italic;margin-top:4px}
.intel-confidence-strip{display:flex;align-items:center;gap:6px;margin-top:6px;font-size:10px;color:var(--muted)}
.intel-confidence-strip .ic-dot{width:6px;height:6px;border-radius:50%;background:#10B981;flex-shrink:0}

.intel-eq-box{background:rgba(0,102,255,0.08);border:1px solid rgba(0,102,255,0.22);border-radius:8px;padding:9px 12px}
.intel-eq-label{font-size:9.5px;text-transform:uppercase;letter-spacing:0.6px;font-weight:700;color:var(--muted);margin-bottom:3px}
.intel-eq-code{font-family:var(--mono);font-size:11.5px;font-weight:600;color:var(--blue-light);line-height:1.45;white-space:pre-wrap;word-break:break-word}
.intel-eq-steps{margin-top:5px;padding-top:5px;border-top:1px dashed rgba(0,102,255,0.2)}
.intel-step-line{font-family:var(--mono);font-size:11px;color:var(--text);line-height:1.45}
.intel-inputs-summary{margin-top:7px;padding-top:7px;border-top:1px solid rgba(255,255,255,0.06)}
body.light-mode .intel-inputs-summary{border-top-color:rgba(0,0,0,0.08)}
.intel-inputs-title{font-size:10px;font-weight:600;color:var(--muted);margin-bottom:5px}
.intel-inputs-chips{display:flex;flex-wrap:wrap;gap:4px}
.intel-input-chip{font-size:10px;background:rgba(255,255,255,0.05);border:1px solid var(--navy-border);padding:2px 6px;border-radius:5px;color:var(--text)}
body.light-mode .intel-input-chip{background:#fff;border-color:#cbd5e1}

.intel-basis-desc{font-size:11px;color:var(--muted);line-height:1.45}
.intel-sub-title{font-size:10px;font-weight:700;letter-spacing:0.5px;text-transform:uppercase;color:var(--text);margin:5px 0 3px}
.intel-assumptions-list ul{margin:0;padding-left:16px;font-size:11px;color:var(--text);line-height:1.5}
.intel-assumptions-list li{margin:2px 0}
.intel-standards-chips{display:flex;flex-direction:column;gap:4px;margin-top:4px}
.intel-std-tag{font-size:10px;display:flex;align-items:baseline;gap:6px;background:rgba(0,102,255,0.07);border:1px solid rgba(0,102,255,0.2);border-radius:5px;padding:3px 7px}
.intel-std-tag strong{color:var(--blue-light);flex-shrink:0}
.intel-std-tag span{color:var(--muted);font-size:9.5px}
.intel-disclaimer-note{font-size:9.5px;color:var(--muted);line-height:1.35;margin-top:4px;padding-top:5px;border-top:1px solid rgba(255,255,255,0.05)}
.intel-placeholder{font-size:11px;color:var(--muted);font-style:italic;padding:4px}

body.light-mode .cw-col-inputs,body.light-mode .cw-col-results,body.light-mode .cw-col-intel{background:#fff!important;border-color:var(--navy-border)!important}

@media(max-width:992px){
  .cw-split{flex-wrap:wrap!important}
  .cw-col-inputs{flex:1 1 0!important;min-width:0!important}
  .cw-col-results{flex:0 0 310px!important;width:310px!important;max-width:330px!important}
  .cw-col-intel{flex:1 1 100%!important}
}
@media(max-width:768px){
  .cw-split{flex-direction:column!important}
  .cw-col-inputs,.cw-col-results,.cw-col-intel{flex:1 1 100%!important;width:100%!important;max-width:100%!important}
}

/* ===== MOBILE COMPACT (full-width, dense inputs) — 2026-09-12 ===== */
@media(max-width:600px){
  .calc-hero{padding:10px 8px 12px}
  .hero-sub{font-size:12px;margin-bottom:8px;line-height:1.45}
  .cw-header{padding:11px 12px;gap:10px}
  .cw-icon{width:32px;height:32px;font-size:17px}
  .cw-title{font-size:15px}
  .cw-catpill{padding:4px 9px;font-size:9px}
  .cw-desc{padding:9px 12px;font-size:11.5px;line-height:1.4}
  .cw-body{padding:9px}
  .cw-split{gap:10px}
  .cw-col{padding:12px 11px;border-radius:10px}
  .panel-label{margin-bottom:10px;padding-bottom:8px}
  .inp-row{grid-template-columns:1fr 1fr!important;gap:8px!important;margin-bottom:8px!important}
  .input-group{gap:3px}
  .input-label{font-size:10.5px}
  .inp{padding:8px 10px;font-size:13px;border-radius:8px}
  .seg-group{gap:5px}
  .seg-btn{padding:8px 6px;min-width:0;font-size:11.5px}
  .how-btn{margin-bottom:8px;padding:4px 9px}
  .calc-run-btn{margin-top:10px;padding:12px 16px;font-size:13.5px;border-radius:10px}
  #modal-results{gap:7px}
  .result-card{padding:9px 11px}
  .result-value{font-size:18px}
}

/* ===== INTEL PANELS COLLAPSIBLE (collapsed by default) 2026-09-12 ===== */
.intel-sec-header{cursor:pointer}
.intel-sec-title{flex:1;min-width:0}
.intel-sec-header::after{content:'\25BE';font-size:11px;color:var(--muted);flex-shrink:0;margin-left:6px;transition:transform .2s}
.intel-section.collapsed .intel-sec-body{display:none}
.intel-section.collapsed .intel-sec-header{border-bottom:none;padding-bottom:0}
.intel-section.collapsed .intel-sec-header::after{transform:rotate(-90deg)}

/* ===== MOBILE: flat (no box container) 2026-09-12 ===== */
@media(max-width:600px){
  .calc-widget{border:none!important;border-radius:0!important;box-shadow:none!important;background:transparent!important;overflow:visible!important}
  .cw-body{padding:0!important;background:transparent!important}
  .cw-col{border:none!important;background:transparent!important;border-radius:0!important;padding:6px 0!important}
  body.light-mode .cw-col,body.light-mode .cw-col-inputs,body.light-mode .cw-col-results,body.light-mode .cw-col-intel{background:transparent!important;border:none!important;box-shadow:none!important}
  .calc-hero{padding:8px 10px 14px!important}
}

/* ===== DESKTOP: 2-col (Inputs | Results) + Engineering Intelligence full-width below ===== */
@media(min-width:769px){
  .cw-split{flex-wrap:wrap!important}
  .cw-col-inputs{flex:1 1 0!important;min-width:0!important}
  .cw-col-results{flex:0 0 310px!important;width:310px!important;max-width:330px!important}
  .cw-col-intel{flex:1 1 100%!important;order:9!important;margin-top:2px}
}

/* ===== HORIZONTAL result rows: label left, value/unit/badge right ===== */
.result-card{display:flex!important;flex-wrap:wrap;align-items:baseline;gap:3px 8px}
.result-label{margin:0!important;margin-right:auto!important;font-size:11.5px;flex-shrink:1;min-width:0}
.result-value{margin:0!important;font-size:18px!important;line-height:1.15}
.result-unit{margin:0!important}
.result-imperial{margin:0!important}
.result-badge{margin:0!important;align-self:center}

/* ===== CALC PAGE SIDEBAR & LAYOUT (ALIGNED TO HEADER WIDTH) ===== */
.calc-shell{display:flex;align-items:flex-start;max-width:1320px;margin:0 auto;width:100%;box-sizing:border-box;padding:0 16px}
#sidebar,.calc-sidebar{width:212px;flex-shrink:0;background:var(--navy-mid);border-right:1px solid var(--navy-border);
  padding:16px 0;position:sticky;top:60px;height:calc(100vh - 60px);overflow-y:auto;
  display:flex;flex-direction:column;gap:1px;transition:var(--tr);box-sizing:border-box}
.calc-body{flex:1;min-width:0;padding-left:22px}
.hero-inner{width:100%;max-width:none;margin:0;padding:0}
.hero-calc{width:100%;margin-top:10px}
.calc-widget{width:100%;box-sizing:border-box}
.side-label{font-size:10px;font-weight:600;letter-spacing:1.5px;text-transform:uppercase;
  color:var(--muted);padding:8px 16px 3px}
.cat-btn{display:flex;align-items:center;gap:8px;padding:8px 16px;cursor:pointer;border:none;
  background:none;color:var(--muted);font-size:12.5px;font-weight:500;width:100%;text-align:left;
  transition:var(--tr);border-left:3px solid transparent;text-decoration:none;font-family:inherit;box-sizing:border-box}
.cat-btn:hover{color:#fff;background:var(--navy-card)}
.cat-btn.active{color:var(--blue);background:var(--blue-dim);border-left-color:var(--blue)}
.cat-dot{width:7px;height:7px;border-radius:50%;flex-shrink:0}
.cat-count{margin-left:auto;font-size:10px;background:var(--navy-border);border-radius:20px;padding:1px 6px;min-width:22px;text-align:center}
.fav-section{padding:8px 0 0;border-top:1px solid var(--navy-border);margin-top:4px}
.recent-section{padding:8px 0 0;border-top:1px solid var(--navy-border)}
body.light-mode #sidebar, body.light-mode .calc-sidebar{background:#fff;border-right-color:var(--navy-border)}
body.light-mode .cat-btn{color:var(--muted)}
body.light-mode .cat-btn:hover{color:var(--text);background:var(--navy-card)}
body.light-mode .cat-btn.active{color:var(--blue);background:var(--blue-dim)}
@media(max-width:992px){
  .calc-shell{display:block;padding:0 14px}
  #sidebar,.calc-sidebar{display:none!important}
  .calc-body{padding-left:0}
  .main-grid{padding:20px 0 40px}
}


/* ===== MEP related cards v1 — Related Calculators as homepage calc-cards, Related Articles as blog-cards ===== */
@keyframes cardIn{to{opacity:1;transform:translateY(0)}}
.rel-calc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.rel-blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
/* Related Calculators — homepage calc-card */
.calc-card{background:var(--navy-card);border:1px solid var(--navy-border);border-radius:var(--radius);padding:17px;cursor:pointer;transition:var(--tr,0.22s cubic-bezier(0.4,0,0.2,1));position:relative;overflow:hidden;text-decoration:none;display:block}
.calc-card::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:var(--card-accent,var(--blue));opacity:0;transition:var(--tr,0.22s cubic-bezier(0.4,0,0.2,1))}
.calc-card:hover{border-color:var(--blue);transform:translateY(-2px);box-shadow:var(--shadow,0 8px 32px rgba(0,0,0,0.4))}
.calc-card:hover::before{opacity:1}
.calc-card .card-top{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:9px}
.calc-card .card-header{display:flex;align-items:flex-start;gap:10px;flex:1}
.calc-card .card-icon{width:38px;height:38px;border-radius:9px;display:grid;place-items:center;font-size:18px;flex-shrink:0;background:var(--card-bg,var(--blue-dim))}
.calc-card .card-meta{flex:1}
.calc-card .card-cat{font-size:10px;font-weight:600;letter-spacing:1px;text-transform:uppercase;color:var(--card-color,var(--blue));margin-bottom:2px}
.calc-card .card-name{font-size:14px;font-weight:700;color:#fff;line-height:1.2}
.calc-card .card-desc{font-size:11.5px;color:var(--muted);line-height:1.5;margin-bottom:10px}
.calc-card .card-tags{display:flex;flex-wrap:wrap;gap:4px;margin-bottom:11px}
.calc-card .card-tags .tag{font-size:10px;padding:2px 7px;border-radius:4px;background:var(--navy-mid);border:1px solid var(--navy-border);color:var(--muted);font-weight:500}
.calc-card .calc-btn{width:100%;padding:9px;border-radius:var(--radius-sm,8px);border:none;background:var(--blue);color:#fff;font-size:12.5px;font-weight:600;cursor:pointer;transition:var(--tr,0.22s cubic-bezier(0.4,0,0.2,1));display:flex;align-items:center;justify-content:center;gap:5px}
.calc-card:hover .calc-btn{background:var(--blue-light);box-shadow:var(--glow,0 0 24px rgba(0,102,255,0.3))}
.calc-card .calc-btn svg{width:13px;height:13px}
.cat-hvac{--card-accent:#00BCD4;--card-color:#00BCD4;--card-bg:rgba(0,188,212,0.1)}
.cat-elec{--card-accent:#FFB300;--card-color:#FFB300;--card-bg:rgba(255,179,0,0.1)}
.cat-plumb{--card-accent:#00E676;--card-color:#00E676;--card-bg:rgba(0,230,118,0.1)}
.cat-fire{--card-accent:#FF3D57;--card-color:#FF3D57;--card-bg:rgba(255,61,87,0.1)}
.cat-gas{--card-accent:#FF7043;--card-color:#FF7043;--card-bg:rgba(255,112,67,0.1)}
.cat-air{--card-accent:#CE93D8;--card-color:#CE93D8;--card-bg:rgba(206,147,216,0.1)}
.cat-mech{--card-accent:#80DEEA;--card-color:#80DEEA;--card-bg:rgba(128,222,234,0.1)}
body.light-mode .calc-card{background:#fff;box-shadow:0 2px 12px rgba(0,0,0,0.07);border-color:var(--navy-border)}
body.light-mode .calc-card:hover{box-shadow:0 6px 24px rgba(0,102,255,0.12)}
body.light-mode .calc-card .card-name{color:var(--text)}
body.light-mode .calc-card .card-desc{color:var(--muted)}
body.light-mode .calc-card .card-tags .tag{color:var(--muted);background:#F0F4FF;border-color:var(--navy-border)}
/* Related Articles — blog-card (dark in both themes, matching the Blogs hub) */
.blog-card{background:var(--navy-card);border:1px solid var(--navy-border);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column;transition:var(--tr,0.22s cubic-bezier(0.4,0,0.2,1));text-decoration:none;color:inherit}
.blog-card:hover{border-color:rgba(0,102,255,0.45);transform:translateY(-3px);box-shadow:var(--shadow,0 8px 32px rgba(0,0,0,0.4))}
.blog-card-img{width:100%;aspect-ratio:16/9;overflow:hidden;flex-shrink:0;position:relative}
.blog-card-img img{width:100%;height:100%;object-fit:cover;display:block;transition:transform 0.4s ease}
.blog-card:hover .blog-card-img img{transform:scale(1.05)}
.blog-card-body{padding:14px 16px 16px;display:flex;flex-direction:column;flex:1}
.blog-meta-row{display:flex;align-items:center;gap:7px;margin-bottom:8px;flex-wrap:wrap}
.blog-cat{font-size:9px;font-weight:700;letter-spacing:1px;text-transform:uppercase;padding:2px 7px;border-radius:4px;background:var(--blue-dim);color:var(--blue-light);flex-shrink:0}
.blog-date{font-size:11px;color:var(--muted)}
.blog-card-title{font-size:14.5px;font-weight:700;color:#fff;line-height:1.35;margin-bottom:8px}
.blog-card-excerpt{font-size:12px;color:var(--muted);line-height:1.65;flex:1;margin-bottom:12px;display:-webkit-box;-webkit-line-clamp:4;-webkit-box-orient:vertical;overflow:hidden}
.blog-read-link{font-size:12px;font-weight:600;color:var(--blue);display:inline-flex;align-items:center;gap:4px;margin-top:auto;transition:var(--tr,0.22s cubic-bezier(0.4,0,0.2,1))}
.blog-read-link svg{width:13px;height:13px;flex-shrink:0;transition:transform 0.2s}
.blog-card:hover .blog-read-link{color:var(--blue-light)}
.blog-card:hover .blog-read-link svg{transform:translateX(3px)}
@media(max-width:960px){.rel-calc-grid,.rel-blog-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.rel-calc-grid,.rel-blog-grid{grid-template-columns:1fr}}
/* ===== end MEP related cards v1 ===== */

/* MEP mobile table scroll — keep wide tables/code from forcing horizontal page scroll on phones */
@media(max-width:600px){
  .ce-table,.prose table,.formula-display table{display:block;overflow-x:auto;-webkit-overflow-scrolling:touch;max-width:100%}
  .prose pre,.formula-display pre,.intel-eq-code{overflow-x:auto;max-width:100%}
}