:root{--navy:#122a34;--ink:#172c37;--muted:#516671;--teal:#087f81;--sea:#117f7d;--light:#f3f8f8;--line:#d9e5e8;--orange:#d56835;--red:#ab3a2f;--yellow:#ffe1a2;--white:#fff;--shadow:0 12px 42px rgba(15,55,72,.055)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#f5f8f8;color:var(--ink);font-family:ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;font-size:15px;line-height:1.5}button,input,select{font:inherit}button{cursor:pointer}button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #2bbfc6;outline-offset:2px}a{color:#066875}.site-head{background:var(--navy);color:white;display:flex;align-items:center;justify-content:space-between;padding:13px max(24px,calc((100vw - 1230px)/2));gap:14px}.brand{display:flex;gap:11px;align-items:center}.brand-icon{background:#1a525d;border-radius:11px;font-size:27px;line-height:1;width:44px;height:44px;display:flex;align-items:center;justify-content:center;color:#ffdb75}.brand strong{font-size:16px;letter-spacing:.07em}.brand strong span{color:#8ce4da}.brand small{font-size:11px;color:#d0dddd;display:block}.head-right{display:flex;align-items:center;gap:9px}.tag{border:1px solid #5b7782;color:#d6e5e7;font-size:10px;letter-spacing:.09em;padding:8px 9px;border-radius:999px}.container{max-width:1280px;margin:auto;padding:0 24px}.intro{padding:30px 0 20px}.intro h1{font-size:clamp(26px,3.2vw,41px);line-height:1.16;letter-spacing:-.035em;margin:8px 0}.intro p{color:var(--muted);max-width:920px;margin:0}.overline{color:var(--teal);font-size:11px;letter-spacing:.15em;font-weight:800}.tabs{display:flex;align-items:center;border-bottom:1px solid var(--line);margin:5px 0 20px;gap:7px}.tab{background:none;border:0;padding:12px 18px 13px;color:#647986;font-size:14px;font-weight:750;border-bottom:3px solid transparent}.tab.active{border-color:var(--teal);color:var(--navy);background:#e8f3f2;border-radius:7px 7px 0 0}.page{display:none}.page.active{display:block}.page-heading{display:flex;justify-content:space-between;align-items:center;gap:15px;margin:4px 0 18px}.page-heading h2{font-size:23px;letter-spacing:-.025em;margin:1px 0 0}.layout{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(340px,.8fr);gap:20px;align-items:start}.form-col,.result-col{display:grid;gap:15px;min-width:0}.panel{background:#fff;border:1px solid var(--line);border-radius:16px;padding:19px 19px 20px;box-shadow:var(--shadow)}.panel h3{font-size:17px;margin:0;letter-spacing:-.02em}.panel h4{font-size:12px;color:#4d6470;letter-spacing:.02em;margin:16px 0 9px}.part-title{display:flex;gap:12px;align-items:flex-start;border-bottom:1px solid #edf1f2;margin-bottom:14px;padding-bottom:12px}.part-title p{margin:2px 0 0;color:var(--muted);font-size:12px}.partnum{flex:0 0 auto;background:#e5f3f3;border:1px solid #d4eded;color:#0a7473;font-weight:800;border-radius:10px;width:29px;height:29px;display:flex;align-items:center;justify-content:center}.question{margin-top:17px}.question:first-child{margin-top:4px}.fieldtitle{display:block;font-weight:700;font-size:14px;margin-bottom:9px}.fieldtitle>span{font-size:11px;font-weight:500;color:#7d919c;margin-left:4px}.help{color:var(--muted);font-size:12px;margin:7px 0 0}.optgrid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px}.optgrid.temps{grid-template-columns:repeat(3,minmax(0,1fr))}.option{position:relative;display:flex;min-height:44px}.option input{position:absolute;opacity:0;top:0;left:0}.option span{font-size:12px;font-weight:680;line-height:1.25;border:1px solid #dce7e8;border-radius:10px;background:#fafcfc;padding:10px 10px;display:flex;align-items:center;width:100%;transition:background .15s,border .15s,color .15s;cursor:pointer;justify-content:center;text-align:center}.option input:checked+span{background:#dcefed;border:2px solid var(--teal);padding:9px 9px;color:#075f5e}.option input:focus-visible+span{outline:3px solid #21abb4;outline-offset:2px}.extra-panel{border-color:#cde1df}.pick{width:100%;height:45px;border:1px solid #cbdada;padding:0 11px;background:white;border-radius:10px;color:var(--ink)}.fine{font-size:11.5px;color:#647882;margin:9px 0 0}.result-card{padding:20px;border-radius:17px;border:1px solid #216e77;background:linear-gradient(155deg,#103744 0%,#145763 100%);color:white;box-shadow:0 16px 26px rgba(9,66,80,.14)}.result-top{display:flex;justify-content:space-between;align-items:center;gap:8px}.result-card .overline{color:#96dedc}.mini-tag{color:#d3f5ed;border:1px solid #47868a;padding:4px 8px;border-radius:999px;font-size:10px;white-space:nowrap}.ratio{font-size:clamp(45px,6vw,74px);letter-spacing:-.04em;line-height:1.12;font-weight:820;margin:16px 0 0;font-variant-numeric:tabular-nums}.ratio-units{font-weight:700;color:#d2edec}.hero-note{font-size:13px;min-height:48px;color:#e7f5f4;margin:15px 0 18px}.two-metrics{display:grid;grid-template-columns:1fr 1fr;gap:8px;border-top:1px solid #4f8e96;padding-top:13px}.two-metrics>div{border-radius:10px;background:#ffffff12;padding:10px;min-width:0}.two-metrics small{color:#c3dfe2;font-size:11px;display:block}.two-metrics strong{display:block;font-size:21px;letter-spacing:-.015em;font-variant-numeric:tabular-nums;overflow-wrap:anywhere}.notice{font-size:12px;margin-top:14px;padding:10px 12px;border-radius:9px;background:#d3e7e7;color:#15414b}.result-card.caution{background:linear-gradient(145deg,#71382c 0%,#993c2e 100%);border-color:#aa665c}.result-card.caution .mini-tag{border-color:#c98d7a}.result-card.caution .two-metrics{border-color:#b46d65}.result-card.caution .notice{background:#ffe3ce;color:#79332a}.result-card.normal{background:linear-gradient(145deg,#13454b,#0c6662)}.oos{margin:14px 0 0;display:flex;align-items:baseline;gap:12px}.oos span{font-size:clamp(52px,6vw,84px);font-weight:820;line-height:1.06;font-variant-numeric:tabular-nums}.oos small{font-size:18px;font-weight:750}.advice{display:grid;gap:8px}.adviceitem{border-left:3px solid #1b9290;padding:9px 11px;border-radius:0 7px 7px 0;background:#f0f7f7;color:#253f48;font-size:13px;line-height:1.48}.adviceitem.warn{border-color:#d88d41;background:#fff5e9}.adviceitem.danger{border-color:#ad4545;background:#fff0ed}.rulebox{display:grid;gap:7px}.rule{border:1px solid #dbe8e8;padding:9px 10px;border-radius:9px;font-size:12px;background:#fafdfc}.rule strong{display:block;color:#0d6f70;font-size:11px;text-transform:uppercase;letter-spacing:.04em}.rule small{color:#73878e;font-size:10px}.muted{font-size:12px;color:#6c7d84}.buttonline{display:flex;gap:7px;flex-wrap:wrap;margin-top:18px}.primary,.outline,.ghost{border-radius:9px;padding:10px 15px;font-weight:750;font-size:13px}.primary{background:var(--teal);color:white;border:1px solid var(--teal)}.outline{background:#fff;color:var(--navy);border:1px solid #b7cdd0}.small{font-size:12px;padding:8px 11px}.ghost{background:transparent;color:white;border:1px solid #77939b}.radio-tile{position:relative;flex:1 1 30%;display:flex}.radio-tile input{position:absolute;opacity:0}.radio-tile span{background:#f6faf9;border:1px solid #cfdddf;border-radius:9px;cursor:pointer;display:flex;align-items:center;justify-content:center;text-align:center;padding:11px 8px;min-height:48px;font-size:12px;font-weight:700;width:100%}.radio-tile input:checked+span{border:2px solid var(--teal);background:#ddf1ef;color:#085f5d;padding:10px 7px}.radio-tile input:focus-visible+span{outline:3px solid #21abb4;outline-offset:2px}.pick-row{display:flex;gap:6px;flex-wrap:wrap}.wbgt-input input{width:100%;height:45px;max-width:300px;border-radius:10px;border:1px solid #c6dadd;padding:11px}.wbgt-input{margin-bottom:18px}.soft-warning{background:#fff5e8;border-left:3px solid #dea04e;padding:10px 12px;margin-top:14px;font-size:12px;color:#69512d}.about-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.about-grid .panel p,.references p{font-size:13px;color:#4c6470;margin-bottom:0}.references{margin-top:15px}.footer{border-top:1px solid var(--line);padding:24px 0;margin:40px 0 0;display:flex;gap:14px;flex-wrap:wrap;color:#687e86;font-size:11px;justify-content:space-between}.text-btn{background:none;color:#2f666a;border:0;text-decoration:underline;font-size:11px}.toast{position:fixed;z-index:50;bottom:15px;left:50%;transform:translateX(-50%);background:#132c36;color:white;padding:11px 17px;border-radius:10px;opacity:0;pointer-events:none;transition:opacity .16s;box-shadow:0 4px 22px #0003;font-size:12px}.toast.show{opacity:1}
@media(max-width:950px){.layout{grid-template-columns:1fr}.result-col{grid-row:1}.result-card{margin-top:0}.ratio{font-size:58px}.about-grid{grid-template-columns:1fr}}
@media(max-width:560px){.site-head{padding:12px 14px}.tag{display:none}.container{padding:0 12px}.intro{padding-top:24px}.panel{padding:15px;border-radius:12px}.optgrid.temps{grid-template-columns:repeat(2,minmax(0,1fr))}.page-heading h2{font-size:20px}.ratio{font-size:53px}.tab{padding:11px;font-size:12px}.tab span{font-size:13px}.mini-tag{font-size:9px}.radio-tile{flex:1 1 100%}.optgrid{gap:6px}.oos span{font-size:64px}.brand strong{font-size:14px}.intro h1{font-size:29px}}
@media print{body{background:white;color:black}.no-print,.site-head,.tabs,.intro,.footer,.buttonline{display:none!important}.container{max-width:none;padding:0}.page:not(.active){display:none}.page.active{display:block}.layout{grid-template-columns:1fr 1fr;align-items:start;gap:10px}.panel{box-shadow:none;break-inside:avoid}.result-card{print-color-adjust:exact;-webkit-print-color-adjust:exact}.result-col{grid-row:auto}.option span{padding:5px}.optgrid{gap:3px}.option{min-height:25px}.page-heading{margin:0 0 8px}}

/* v3: consistent yes/no order, phase time capture and carried-forward preflight result */
.optgrid.yesno{grid-template-columns:repeat(2,minmax(0,1fr))}
.phase-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.phase-grid .fieldtitle{font-size:12px;color:#3d5762}
.phase-grid input,.number-box{display:block;width:100%;min-width:0;margin-top:7px;border-radius:10px;border:1px solid #c6dadd;padding:11px 9px;height:45px;background:#fff;color:var(--ink)}
.two-field{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:12px}
.carry-card{padding:16px 18px;border:1px solid #86bfba;border-radius:14px;background:#eaf6f4;color:#103f49}
.carry-head{display:flex;justify-content:space-between;align-items:center;gap:10px}
.carry-head>span:last-child{font-weight:700;font-size:12px;color:#406c70}
.carry-ratio{display:flex;gap:12px;align-items:baseline;flex-wrap:wrap;margin-top:8px}
.carry-ratio strong{font-size:39px;letter-spacing:-.04em;line-height:1.15;font-variant-numeric:tabular-nums}
.carry-ratio span{font-size:12px;font-weight:700;max-width:180px}
.carry-card p{font-size:12px;color:#4c7075;margin:6px 0 0}
.phase-summary{font-size:12px;color:#d9f1f0;margin-top:10px;line-height:1.5}
@media(max-width:560px){.phase-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:6px}.phase-grid .fieldtitle{font-size:11px}.phase-grid input{padding:8px 5px}.two-field{grid-template-columns:1fr}.carry-ratio strong{font-size:35px}}

/* v4: easily tappable time-range buttons */
.phase-grid{display:grid;grid-template-columns:1fr;gap:13px}
.time-field{min-width:0;border:1px solid #deebeb;background:#f8fbfb;border-radius:12px;padding:12px;margin:0}
.time-field legend{font-size:14px;font-weight:800;color:#28444e;padding:0 7px}
.duration-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:7px}
.duration-option{min-height:51px}
.duration-option span{font-size:13px;font-variant-numeric:tabular-nums;white-space:nowrap}
.duration-hint{color:#617984;font-size:11px;line-height:1.4;margin:7px 0 0}
@media(max-width:560px){.phase-grid{grid-template-columns:1fr;gap:14px}.duration-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.duration-option{min-height:48px}.time-field{padding:12px}}
@media print{.duration-option{min-height:31px}.duration-grid{gap:4px}.time-field{break-inside:avoid}}

/* v5: simplified, tap-first questionnaire and prominent exceedance warning */
[hidden]{display:none!important}
.humidity-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.one-metric{grid-template-columns:1fr}
.question-group{margin-top:17px}
.question-group:first-of-type{margin-top:4px}
.auto-label{display:inline-block;background:#dcefeb;color:#116262;font-size:10px;font-weight:750;padding:4px 7px;border-radius:20px;margin-left:5px;vertical-align:middle}
.restore-auto{margin-top:10px;font-size:12px;padding:0}
.work-warning{margin:14px 0;padding:14px;border:1px solid #f3c783;border-radius:11px;background:#fff1cc;color:#654313}
.work-warning strong{display:block;font-size:15px;line-height:1.3}
.work-warning p{font-size:12px;line-height:1.4;margin:7px 0 0}
.result-card.caution .work-warning{background:#ffe6cf;border-color:#f5bf8a}
.optgrid.humidity-grid .option{min-height:48px}
@media(max-width:560px){.humidity-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.auto-label{margin-top:5px}.work-warning strong{font-size:14px}}

/* v6: immediately visible heat-illness stand-down and in-form NIOSH checkpoint */
.standdown-banner{border:2px solid #b51926;background:#ffe5e5;color:#891723;border-radius:14px;padding:17px 18px;margin:0 0 17px;box-shadow:0 3px 10px #84212414}
.standdown-banner strong{display:block;font-size:17px;line-height:1.3;letter-spacing:.01em}
.standdown-banner p{font-size:13px;line-height:1.45;margin:8px 0 0}
#postflight.symptom-yes [data-question="POST_04"]{background:#fff1f1;border:2px solid #ad2630}
#postflight.symptom-yes [data-question="POST_04"] .partnum{background:#a31b28;color:#fff}
#postflight.symptom-yes [data-question="POST_04"] input[value="YES"]:checked+span{background:#b41e2a;color:#fff;border-color:#85121c}
.result-card.stand-down{background:linear-gradient(145deg,#a91d2b,#68121f);border-color:#b5293a;box-shadow:0 14px 30px #9f172e33}
.result-card.stand-down .mini-tag{border-color:#e78f96;background:#ffffff1b;color:white}
.result-card.stand-down .two-metrics{border-color:#d36b75}
.result-card.stand-down .oos span{font-size:clamp(37px,5.5vw,64px);letter-spacing:-.04em}
.decision-break{display:flex;align-items:center;gap:13px;margin:24px 0 12px;color:#54747c;font-size:11px;font-weight:850;letter-spacing:.1em}
.decision-break:before,.decision-break:after{content:"";flex:1;border-top:1px solid #ccdbde}
.checkpoint-warning{margin:0 0 17px;background:#fff0cf;border:2px solid #e9bb6f;color:#654313}
@media print{.standdown-banner{print-color-adjust:exact;-webkit-print-color-adjust:exact}}