:root{color-scheme:light;--navy-950:#061a2c;--navy-900:#0b2d4d;--navy-800:#123f68;--blue-700:#176e9e;--teal-600:#078f93;--teal-500:#0ca7a4;--cyan-300:#70e2db;--ice:#edf5f8;--slate-900:#152638;--slate-700:#405467;--slate-500:#6b7c8d;--slate-300:#c7d3dc;--slate-200:#dfe7ed;--white:#fff;--shadow:0 18px 44px rgba(10,44,74,.1);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
*{box-sizing:border-box}[hidden]{display:none!important}html{min-width:320px;background:#f3f7f9}body{margin:0;min-height:100vh;color:var(--slate-900);background:linear-gradient(180deg,#f9fbfc,#edf4f7)}button,input,select{font:inherit}button{cursor:pointer}
.site-header{min-height:76px;padding:12px clamp(18px,4vw,52px);color:#fff;background:linear-gradient(105deg,var(--navy-950),var(--navy-900) 58%,var(--navy-800));display:flex;align-items:center;justify-content:space-between;gap:20px;box-shadow:0 5px 18px rgba(4,25,43,.18)}.brand{color:inherit;text-decoration:none;display:inline-flex;align-items:center;gap:12px}.brand-mark{width:46px;height:46px;color:#59d3cc;flex:none}.brand strong{display:block;font-size:1.12rem;line-height:1.2;letter-spacing:-.01em}.brand small{display:block;margin-top:4px;color:#bdd2e1;font-size:.78rem}.free-badge{padding:7px 12px;border:1px solid rgba(123,225,218,.45);border-radius:999px;color:#b8f2ee;background:rgba(7,143,147,.15);font-size:.78rem;font-weight:800;text-transform:uppercase;letter-spacing:.08em;white-space:nowrap}
.page-shell{width:min(1180px,100%);margin:0 auto;padding:clamp(26px,4vw,48px) clamp(16px,4vw,38px) 42px}.intro-row{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:22px}.eyebrow{margin:0 0 7px;color:var(--teal-600);font-size:.76rem;font-weight:850;letter-spacing:.13em;text-transform:uppercase}.intro-row h1{margin:0;color:var(--navy-900);font-size:clamp(1.75rem,4vw,2.6rem);line-height:1.12;letter-spacing:-.04em}.intro-row p:last-child{margin:8px 0 0;color:var(--slate-700);font-size:1rem;line-height:1.5}.reset-button{padding:9px 15px;border:1px solid var(--slate-300);border-radius:8px;color:var(--navy-900);background:#fff;font-weight:750}.reset-button:hover{border-color:var(--blue-700)}
.sensor-tabs{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:17px}.sensor-tab{min-height:76px;padding:12px 18px;border:1px solid var(--slate-200);border-radius:12px;color:var(--slate-700);background:rgba(255,255,255,.7);display:flex;align-items:center;gap:13px;text-align:left}.sensor-tab:hover{border-color:#a6bccb}.sensor-tab.active{color:var(--navy-900);border-color:#78bfc3;background:#fff;box-shadow:0 8px 24px rgba(10,61,86,.08)}.tab-symbol{width:46px;height:42px;border-radius:9px;color:var(--blue-700);background:#dfedf3;display:grid;place-items:center;font-size:.91rem;font-weight:850}.sensor-tab.active .tab-symbol{color:#fff;background:linear-gradient(135deg,var(--blue-700),var(--teal-500))}.sensor-tab strong,.sensor-tab small{display:block}.sensor-tab strong{font-size:.96rem}.sensor-tab small{margin-top:4px;color:var(--slate-500);font-size:.78rem}
.calculator-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:20px}.input-card,.result-card{min-width:0;padding:clamp(21px,3vw,31px);border:1px solid var(--slate-200);border-radius:15px;background:#fff;box-shadow:var(--shadow)}.result-card{color:#fff;border-color:transparent;background:linear-gradient(145deg,var(--navy-900),#0c385e 68%,#0f496b);position:relative;overflow:hidden}.result-card:after{content:"";width:260px;height:260px;border:1px solid rgba(92,215,207,.14);border-radius:50%;position:absolute;right:-145px;top:-145px}.card-heading{display:flex;align-items:center;gap:11px;margin-bottom:25px}.card-heading h2,.card-heading p{margin:0}.card-heading h2{font-size:1.03rem}.card-heading p{margin-top:4px;color:var(--slate-500);font-size:.76rem}.card-heading.light p{color:#b8cede}.step{width:28px;height:28px;border-radius:50%;color:#fff;background:var(--blue-700);display:grid;place-items:center;font-size:.76rem;font-weight:850;flex:none}.card-heading.light .step{color:var(--navy-950);background:var(--cyan-300)}
label,legend{color:var(--slate-700);font-size:.87rem;font-weight:700}label{display:grid;gap:7px;margin-bottom:17px}fieldset{min-width:0;margin:0 0 17px;padding:0;border:0}legend{margin-bottom:8px}input,select{width:100%;min-height:47px;padding:10px 12px;border:1px solid var(--slate-300);border-radius:8px;color:var(--slate-900);background:#fbfdfe;font-size:1rem}input:hover,select:hover{border-color:#89a6b8}button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid rgba(12,167,164,.28);outline-offset:2px}.segmented-control{padding:4px;border:1px solid var(--slate-300);border-radius:9px;background:#f1f5f7;display:grid;grid-template-columns:1fr 1fr;gap:4px}.segmented-control label{margin:0;display:block}.segmented-control input{position:absolute;opacity:0;pointer-events:none}.segmented-control span{min-height:39px;padding:8px;border-radius:6px;display:grid;place-items:center;color:var(--slate-700);font-size:.82rem}.segmented-control input:checked+span{color:var(--navy-900);background:#fff;box-shadow:0 2px 7px rgba(12,45,75,.12);font-weight:800}.segmented-control input:focus-visible+span{outline:3px solid rgba(12,167,164,.28)}.input-with-unit{display:grid;grid-template-columns:minmax(0,1fr) 90px;gap:12px}.unit-field{min-width:0}.wire-section{padding-top:17px;border-top:1px solid var(--slate-200);display:grid;grid-template-columns:1fr 1fr;gap:12px}.field-help{color:var(--slate-500);font-size:.74rem;font-weight:500;line-height:1.4}.is-disabled{opacity:.48}.is-disabled input{cursor:not-allowed}
.primary-result{min-height:124px;padding:18px 0 24px;border-bottom:1px solid rgba(255,255,255,.15);display:flex;flex-direction:column;justify-content:center}.primary-result span{color:#b8cede;font-size:.79rem;font-weight:700;text-transform:uppercase;letter-spacing:.09em}.primary-result strong{margin-top:8px;color:var(--cyan-300);font-size:clamp(2rem,4.5vw,2.85rem);line-height:1.08;letter-spacing:-.045em;overflow-wrap:anywhere}.result-list{margin-top:9px}.result-list>div{min-height:43px;padding:10px 0;border-bottom:1px solid rgba(255,255,255,.1);display:flex;align-items:center;justify-content:space-between;gap:16px}.result-list span{color:#b8cede;font-size:.82rem}.result-list strong{text-align:right;font-size:.93rem}.formula-disclosure{margin-top:13px;color:#c9dce8;font-size:.78rem}.formula-disclosure summary{width:max-content;cursor:pointer;color:#9eddd8;font-weight:750}.formula-disclosure summary:hover{color:#fff}.formula{margin:8px 0 0;padding:11px 13px;border-radius:7px;color:#c9dce8;background:rgba(0,0,0,.14);font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.75rem;line-height:1.5}.status-message{min-height:1.25rem;margin:9px 0 0;color:#ffb4ab;font-size:.82rem;font-weight:700}.field-guidance{margin-top:14px;padding:14px 18px;border:1px solid #d4e3e8;border-left:4px solid var(--teal-500);border-radius:8px;color:var(--slate-700);background:rgba(255,255,255,.68);display:grid;grid-template-columns:max-content 1fr;gap:16px;font-size:.8rem;line-height:1.45}
.reference-strip{margin-top:20px;padding:18px;border:1px solid var(--slate-200);border-radius:12px;background:rgba(255,255,255,.72);display:grid;grid-template-columns:1fr 1fr 1.5fr;gap:20px;align-items:center}.reference-strip>div{display:flex;align-items:center;gap:11px}.reference-strip p{margin:0;color:var(--slate-700);font-size:.77rem;line-height:1.45}.reference-mark{width:44px;height:34px;border-radius:7px;color:var(--teal-600);background:#dff3f2;display:grid;place-items:center;font-size:.68rem;font-weight:900;letter-spacing:.04em;flex:none}.disclaimer{padding-left:20px;border-left:1px solid var(--slate-200)}
@media(max-width:1100px) and (min-width:781px){.page-shell{padding-left:18px;padding-right:18px}.calculator-grid{gap:12px}.input-card,.result-card{padding-left:20px;padding-right:20px}}
@media(max-height:1100px) and (min-width:781px){.site-header{min-height:52px;padding-top:5px;padding-bottom:5px}.brand{gap:9px}.brand-mark{width:32px;height:32px}.brand strong{font-size:.92rem}.brand small{margin-top:1px;font-size:.68rem}.free-badge{padding:4px 9px;font-size:.68rem}.page-shell{width:min(760px,100%);padding-top:11px;padding-bottom:14px}.intro-row{align-items:center;margin-bottom:8px}.eyebrow{display:none}.intro-row h1{font-size:1.35rem}.intro-row p:last-child{margin-top:2px;font-size:.82rem;line-height:1.35}.reset-button{padding:6px 10px;font-size:.82rem}.sensor-tabs{gap:7px;margin-bottom:8px}.sensor-tab{min-height:46px;padding:5px 10px;border-radius:9px}.tab-symbol{width:32px;height:30px}.sensor-tab strong{font-size:.87rem}.sensor-tab small{margin-top:0;font-size:.72rem}.calculator-grid{gap:10px}.input-card,.result-card{padding:12px 14px;border-radius:11px}.card-heading{gap:8px;margin-bottom:10px}.card-heading h2{font-size:.94rem}.card-heading p{margin-top:1px;font-size:.7rem}.step{width:23px;height:23px;font-size:.7rem}label{gap:4px;margin-bottom:8px}fieldset{margin-bottom:8px}legend{margin-bottom:4px}input,select{min-height:35px;padding:5px 9px;font-size:.9rem}.segmented-control{padding:3px}.segmented-control span{min-height:28px;padding:4px}.input-with-unit,.wire-section{gap:8px}.wire-section{padding-top:8px}.primary-result{min-height:58px;padding:5px 0 8px}.primary-result span{font-size:.7rem}.primary-result strong{margin-top:2px;font-size:1.75rem}.result-list{margin-top:3px}.result-list>div{min-height:25px;padding:3px 0}.result-list span{font-size:.74rem}.result-list strong{font-size:.82rem}.formula-disclosure{margin-top:6px}.formula{margin-top:4px;padding:6px 8px}.status-message{min-height:.7rem;margin-top:3px}.field-guidance{margin-top:7px;padding:7px 10px}.reference-strip{margin-top:8px;padding:8px 10px;gap:12px}.reference-mark{width:38px;height:29px}.reference-strip p{font-size:.7rem}}
@media(max-width:780px){.calculator-grid{grid-template-columns:1fr}.reference-strip{grid-template-columns:1fr 1fr}.disclaimer{grid-column:1/-1;padding:15px 0 0;border-left:0;border-top:1px solid var(--slate-200)}}
@media(max-width:560px){.site-header{min-height:68px;padding:10px 15px}.brand-mark{width:40px;height:40px}.brand strong{font-size:.95rem}.brand small{font-size:.69rem}.free-badge{display:none}.page-shell{padding:23px 14px 34px}.intro-row{align-items:flex-start}.intro-row p:last-child{font-size:.9rem}.reset-button{padding:8px 11px}.sensor-tabs{grid-template-columns:1fr;gap:8px}.sensor-tab{min-height:64px;padding:9px 12px}.calculator-grid{gap:13px}.input-card,.result-card{padding:20px;border-radius:12px}.wire-section{grid-template-columns:1fr;gap:0}.field-guidance{grid-template-columns:1fr;gap:5px}.reference-strip{grid-template-columns:1fr}.disclaimer{grid-column:auto}.primary-result{min-height:108px}}
@media(max-width:390px){.brand small{display:none}.brand strong{max-width:210px}.input-with-unit{grid-template-columns:1fr}.result-list>div{align-items:flex-start}}
@media(prefers-reduced-motion:no-preference){.calculator-panel.active{animation:reveal 180ms ease-out}@keyframes reveal{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}}