:root{--calc-ink:#102f38;--calc-petrol:#0d4c4c;--calc-muted:#566b70;--calc-line:rgba(25,67,72,.18);--calc-orange:#e8652d;--calc-paper:#f7faf9}
body.calc-page{margin:0;background:radial-gradient(circle at 88% 10%,rgba(77,143,143,.18),transparent 30%),linear-gradient(180deg,#f9fbfb,#edf4f2 62%,#f7f9f8);color:var(--calc-ink)}
.calc-header{position:relative;min-height:316px;padding:28px max(28px,calc((100vw - 1240px)/2));overflow:hidden;border-bottom:6px solid var(--calc-orange);background:linear-gradient(90deg,rgba(250,252,252,.98) 0%,rgba(250,252,252,.86) 48%,rgba(232,241,239,.48)),radial-gradient(circle at 82% 45%,rgba(19,106,88,.2),transparent 33%)}
.calc-header::after{content:"Σ";position:absolute;right:5vw;top:-96px;color:rgba(13,76,76,.055);font:800 390px/1 Georgia,serif;pointer-events:none}
.calc-header__top{position:relative;z-index:1;display:flex;align-items:flex-start;justify-content:space-between;gap:24px;max-width:1240px;margin:auto}
.calc-brand{display:flex;flex-wrap:wrap;align-items:baseline;color:#122d34;font-size:30px;font-weight:850;letter-spacing:.11em}.calc-brand>span{color:var(--calc-orange)}.calc-brand small{width:100%;color:var(--calc-muted);font-size:12px;font-weight:650;letter-spacing:.13em}.calc-header__top>p{margin:8px 0;color:var(--calc-muted);font-size:13px;letter-spacing:.08em;text-transform:uppercase}
.calc-bookmarks{position:absolute;z-index:2;right:max(28px,calc((100vw - 1240px)/2));bottom:-5px;left:max(28px,calc((100vw - 1240px)/2));display:grid!important;grid-template-columns:repeat(6,minmax(0,1fr));gap:13px!important;margin:0!important}
.calc-bookmarks a{min-height:96px!important}.calc-bookmarks a[aria-current=page]{box-shadow:inset 0 -4px 0 rgba(var(--bookmark-rgb),.64),0 10px 24px rgba(16,47,56,.16)!important}
.calc-main{max-width:1180px;margin:auto;padding:0 28px 70px}.calc-hero{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(260px,.7fr);gap:52px;align-items:end;padding:72px 0 38px}.calc-kicker{margin:0;color:#4f6d70;font-size:11px;font-weight:800;letter-spacing:.18em}.calc-hero h1{margin:14px 0 18px;font-size:clamp(42px,6vw,76px);line-height:.98;letter-spacing:-.055em}.calc-hero h1 span{color:#286968}.calc-lead{max-width:720px;margin:0;color:var(--calc-muted);font-size:19px}.calc-rule{padding:24px;border:1px solid var(--calc-line);border-radius:16px;background:rgba(255,255,255,.72);box-shadow:0 14px 35px rgba(19,66,70,.09);backdrop-filter:blur(12px)}.calc-rule span{color:var(--calc-orange);font-size:10px;font-weight:850;letter-spacing:.16em}.calc-rule strong{display:block;margin:10px 0 8px;font-size:17px}.calc-rule p{margin:0;color:var(--calc-muted);font-size:13px}
.calc-launchers{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin:0 0 28px}.calc-launchers button{display:grid;grid-template-columns:auto 1fr;grid-template-rows:auto auto;gap:3px 13px;min-height:118px;padding:20px;text-align:left;border:1px solid rgba(22,97,95,.24);border-radius:15px;background:rgba(255,255,255,.88);box-shadow:0 10px 28px rgba(18,61,66,.08);transition:transform .2s ease,box-shadow .2s ease}.calc-launchers button:hover,.calc-launchers button:focus-visible{transform:translateY(-4px);box-shadow:0 16px 34px rgba(18,61,66,.14)}.calc-launchers button>span{grid-row:1/3;color:var(--calc-orange);font-size:11px;font-weight:850}.calc-launchers strong{font-size:16px}.calc-launchers small{color:var(--calc-muted);font-size:12px;line-height:1.35}
.calc-workspace{scroll-margin-top:20px;overflow:hidden;border:1px solid rgba(18,86,84,.28);border-radius:22px;background:rgba(255,255,255,.9);box-shadow:0 22px 54px rgba(13,62,65,.12)}.calc-workspace__heading{display:flex;align-items:end;justify-content:space-between;gap:24px;padding:26px 30px;border-bottom:1px solid var(--calc-line);background:linear-gradient(105deg,rgba(19,106,88,.1),rgba(255,255,255,.6))}.calc-workspace__heading h2{margin:5px 0 0;font-size:28px}.calc-workspace__heading>p{max-width:360px;margin:0;color:var(--calc-muted);font-size:12px;text-align:right}.calc-page .field-tech-suite{max-width:none;margin:0;padding:30px}.calc-page .field-suite-head{display:none}.calc-page .field-suite-tabs{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:10px}.calc-page .field-suite-tabs button{border-color:#9bb7b4;background:#f5f8f7;color:var(--calc-ink);font-size:11px;font-weight:800}.calc-page .field-suite-tabs button[aria-selected=true]{border-color:#174f50;background:#174f50;color:white}.calc-page .field-suite-panel{max-width:820px;margin:auto}.calc-page .field-suite-panel input,.calc-page .field-suite-panel select{border-color:#adc0bd;background:#fff;color:#111;font-size:16px}.calc-page .field-primary{border:0;background:#123f42;color:#fff;font-weight:800}.calc-page .field-output{border-radius:11px;background:#edf5f2}.calc-page .field-output[data-state=optimal]{border-color:#1e7b62;background:#e8f5ef}.calc-page .field-output[data-state=attention]{border-color:#c66a20;background:#fff3e8}.calc-page .field-output[data-state=critical]{border-color:#b82a24;background:#fff0f0}
.calc-method,.calc-official{display:grid;grid-template-columns:minmax(230px,.65fr) minmax(0,1.35fr);gap:44px;padding:64px 0 0}.calc-method h2,.calc-official h2{margin:10px 0;font-size:31px;line-height:1.15}.calc-method__grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.calc-method article,.calc-official a{padding:22px;border-top:3px solid #5a9188;background:rgba(255,255,255,.72)}.calc-method article>span{color:var(--calc-orange);font-size:11px;font-weight:800}.calc-method h3{margin:12px 0 8px;font-size:17px}.calc-method article p{margin:0;color:var(--calc-muted);font-size:13px}.calc-official>div:last-child{display:grid;gap:10px}.calc-official a{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:72px;border-top-width:1px;border-radius:10px}.calc-official a:hover{text-decoration:none;box-shadow:0 10px 22px rgba(13,62,65,.09)}.calc-official a span{color:var(--calc-muted);font-size:12px;text-align:right}
.calc-footer{display:flex;align-items:center;gap:18px;max-width:1180px;margin:auto;padding:30px 28px;border-top:1px solid var(--calc-line);color:var(--calc-muted);font-size:12px}.calc-footer strong{color:var(--calc-ink);font-size:18px}.calc-footer nav{display:flex;gap:18px;margin-left:auto}
@media(max-width:900px){.calc-header{min-height:auto;padding:24px 20px 20px}.calc-header__top>p{display:none}.calc-bookmarks{position:relative;right:auto;bottom:auto;left:auto;grid-template-columns:repeat(3,minmax(0,1fr));margin-top:34px!important}.calc-bookmarks a{min-height:58px!important;height:58px!important;padding:16px 8px!important;border-radius:12px!important}.calc-hero{grid-template-columns:1fr;gap:24px;padding-top:44px}.calc-launchers{grid-template-columns:1fr 1fr}.calc-method,.calc-official{grid-template-columns:1fr;gap:18px}.calc-main{padding-inline:20px}.calc-page .field-suite-tabs{grid-template-columns:repeat(3,1fr)}}
@media(max-width:600px){.calc-bookmarks{grid-template-columns:1fr 1fr}.calc-launchers,.calc-method__grid{grid-template-columns:1fr}.calc-workspace__heading{align-items:flex-start;flex-direction:column}.calc-workspace__heading>p{text-align:left}.calc-page .field-tech-suite{padding:20px 14px}.calc-page .field-suite-tabs{grid-template-columns:1fr 1fr}.calc-page .field-grid-two{grid-template-columns:1fr}.calc-official a{align-items:flex-start;flex-direction:column}.calc-official a span{text-align:left}.calc-footer{align-items:flex-start;flex-direction:column}.calc-footer nav{margin:0;flex-wrap:wrap}}
@media(prefers-reduced-motion:reduce){.calc-launchers button{transition:none}.calc-launchers button:hover,.calc-launchers button:focus-visible{transform:none}}

/* v3 — one fast field workflow: the launcher is the only visible tool selector. */
.calc-page .field-suite-tabs{display:none!important}
.calc-launchers button.is-selected,.calc-launchers button[aria-selected="true"]{border-color:#185f5c;background:#fff;box-shadow:inset 0 -4px 0 #287c76,0 15px 34px rgba(18,61,66,.14)}
.calc-launchers button.is-selected strong{color:#145a57}
.calc-page .field-suite-panel{max-width:900px}
.calc-page .field-suite-intro{margin:0 0 22px;color:#3d5b60;font-size:16px;line-height:1.55}
.calc-page .field-suite-panel label{gap:9px;color:#173a42;font-size:15px;line-height:1.35}
.calc-page .field-suite-panel input,.calc-page .field-suite-panel select{min-height:54px;padding:12px 14px;border:1px solid #8ba9a5;border-radius:10px;background:#fff;color:#102f38;font-size:17px}
.calc-page .field-suite-panel [aria-invalid="true"]{border-color:#b82a24;box-shadow:0 0 0 3px rgba(184,42,36,.13)}
.field-form-actions,.field-result-actions{display:flex;flex-wrap:wrap;gap:10px}
.field-form-actions>button{flex:1 1 180px}
.calc-page .field-primary,.calc-page .field-secondary,.calc-page .field-result-actions button{min-height:52px;padding:12px 18px;border-radius:9px;font-size:13px;font-weight:800;letter-spacing:.025em}
.calc-page .field-secondary,.calc-page .field-result-actions button{border:1px solid #8aa6a2;background:#fff;color:#174f50}
.calc-page .field-swap{align-self:end}
.calc-page .field-output{display:grid;gap:12px;min-height:76px;padding:20px;border-width:1px 1px 1px 5px;font-size:16px;line-height:1.5}
.calc-page .field-output>span,.calc-page .field-output small{color:#3f5a60;font-size:14px}
.calc-page .field-reading{display:grid;grid-template-columns:58px minmax(0,1fr);gap:4px 14px;padding:11px 0;border-bottom:1px solid rgba(16,47,56,.14)}
.calc-page .field-reading span{align-self:center;color:#49666b;font-size:13px;font-weight:900;letter-spacing:.08em}
.calc-page .field-reading strong{color:#123f42;font-size:clamp(30px,5vw,44px);line-height:1}
.calc-page .field-reading small{grid-column:2;margin:0}
.field-result-actions{margin-top:5px}
.field-action-feedback{padding:10px 12px;border-radius:8px;background:#10383c;color:#fff;font-weight:750}
#calc-offline-status{font-weight:700;color:#315e5d}

@media(max-width:900px){
  .calc-header{padding-top:18px;padding-bottom:14px}
  .calc-header__top{align-items:center}
  .calc-bookmarks{margin-top:18px!important}
  .calc-main{padding-bottom:48px}
  .calc-hero{gap:14px;padding:30px 0 22px}
  .calc-hero h1{margin:10px 0 12px;font-size:clamp(38px,9vw,56px)}
  .calc-lead{font-size:17px}
  .calc-rule{padding:16px}
  .calc-launchers{gap:10px;margin-bottom:18px}
  .calc-launchers button{min-height:88px;padding:15px}
  .calc-workspace__heading{padding:20px 22px}
  .calc-page .field-tech-suite{padding:22px}
}
@media(max-width:600px){
  .calc-header{border-bottom-width:4px}
  .calc-brand{font-size:24px}
  .calc-bookmarks{gap:8px!important}
  .calc-bookmarks a{min-height:50px!important;height:50px!important;padding:10px 6px!important;font-size:12px!important}
  .calc-main{padding-inline:14px}
  .calc-hero{padding:22px 2px 16px}
  .calc-hero h1{font-size:40px;letter-spacing:-.045em}
  .calc-lead{font-size:16px}
  .calc-rule{display:none}
  .calc-launchers{grid-template-columns:1fr 1fr}
  .calc-launchers button{grid-template-columns:auto 1fr;min-height:82px;padding:12px;gap:2px 9px}
  .calc-launchers button>span{font-size:10px}
  .calc-launchers strong{font-size:15px}
  .calc-launchers small{font-size:11px}
  .calc-workspace{border-radius:15px}
  .calc-workspace__heading{gap:8px;padding:16px}
  .calc-workspace__heading h2{font-size:22px}
  .calc-page .field-tech-suite{padding:16px 12px}
  .calc-page .field-suite-intro{margin-bottom:16px;font-size:15px}
  .calc-page .field-grid-two{grid-template-columns:1fr}
  .field-form-actions,.field-result-actions{display:grid;grid-template-columns:1fr 1fr}
  .field-result-actions [data-suite-report]{grid-column:1/-1}
  .calc-page .field-reading{grid-template-columns:46px minmax(0,1fr)}
  .calc-method,.calc-official{padding-top:44px}
}

/* v4 — on a phone the first measurement stays within the first working scroll. */
@media(max-width:600px){
  .calc-header{padding:14px 14px 10px}
  .calc-header__top{min-height:34px}
  .calc-brand{font-size:22px}
  .calc-brand small{font-size:9px}
  .calc-bookmarks{
    display:flex!important;
    gap:7px!important;
    margin-top:10px!important;
    overflow-x:auto;
    overscroll-behavior-inline:contain;
    padding:0 0 3px;
    scrollbar-width:none;
    scroll-snap-type:x proximity;
  }
  .calc-bookmarks::-webkit-scrollbar{display:none}
  .calc-bookmarks a{
    flex:0 0 104px;
    min-height:44px!important;
    height:44px!important;
    padding:8px 5px!important;
    scroll-snap-align:start;
  }
  .calc-hero{padding:14px 2px 12px}
  .calc-hero .calc-kicker{display:none}
  .calc-hero h1{margin:0 0 8px;font-size:34px;line-height:1}
  .calc-lead{font-size:14px;line-height:1.38}
  .calc-launchers{gap:8px;margin-bottom:12px}
  .calc-launchers button{min-height:70px;padding:9px 10px}
  .calc-launchers small{display:none}
  .calc-workspace__heading{padding:12px 14px}
  .calc-workspace__heading .calc-kicker{font-size:9px}
  .calc-workspace__heading h2{margin-top:2px;font-size:20px}
  .calc-workspace__heading>p{font-size:11px}
  .calc-page .field-tech-suite{padding:13px 11px}
  .calc-page .field-suite-intro{margin-bottom:12px;font-size:14px;line-height:1.4}
}