:root{--bg:#f4f6fa;--surface:#ffffff;--ink:#0f172a;--muted:#64748b;--line:#e2e8f0;--primary:#047857;--primary-dark:#065f46;--primary-soft:#ecfdf5;--accent:#d97706;--danger:#b91c1c;--radius:14px;--radius-sm:10px;--shadow:0 1px 2px rgba(15,23,42,.06),0 12px 32px -16px rgba(15,23,42,.22)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}
.wrap{max-width:960px;margin:0 auto;padding:0 20px}
a{color:var(--primary-dark)}
:focus-visible{outline:3px solid rgba(4,120,87,.4);outline-offset:2px}

.hdr{position:sticky;top:0;z-index:20;background:#fff;box-shadow:0 1px 0 var(--line),0 6px 18px -12px rgba(15,23,42,.25)}
.hdr-in{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-size:17px;font-weight:700}
.mark{display:grid;place-items:center;width:38px;height:38px;border-radius:14px;background:var(--primary);color:#fff;font-weight:800;font-size:15px;letter-spacing:.5px}
.hdr nav{display:flex;gap:22px}
.hdr nav a{color:var(--muted);text-decoration:none;font-weight:600;font-size:15px}
.hdr nav a:hover{color:var(--primary)}

.intro{padding:44px 0 24px}
h1{margin:0 0 12px;font-size:clamp(30px,5vw,44px);line-height:1.1;font-weight:800;letter-spacing:-.02em}
.intro p{margin:0;max-width:70ch;color:var(--muted);font-size:17px}
h2{font-size:26px;line-height:1.2;margin:0 0 18px;letter-spacing:-.01em}

.card{background:var(--surface);border-radius:16px;box-shadow:var(--shadow)}
.tool{padding:28px 20px}
.tabs{display:flex;gap:8px;margin-bottom:24px;flex-wrap:wrap}
.tab{border:0;border-radius:99px;padding:11px 22px;font:inherit;font-weight:700;background:var(--bg);color:var(--muted);cursor:pointer;transition:background .2s,color .2s}
.tab:hover{color:var(--ink)}
.tab.on{background:var(--primary);color:#fff}

.f{display:flex;flex-direction:column;gap:6px;border:0;padding:0;margin:0 0 18px;min-width:0}
.f>span,legend{font-size:14px;font-weight:600;padding:0;margin-bottom:6px}
.f.f{margin-bottom:0}
fieldset.f{display:block;margin:0 0 20px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:16px;margin-bottom:18px}
.grid.two{grid-template-columns:1fr 1fr;max-width:380px;margin-bottom:0}
input[type=time],input[type=date],input[type=number]{width:100%;height:46px;border:1.5px solid var(--line);border-radius:var(--radius-sm);padding:0 12px;font:inherit;background:#fff;color:var(--ink);transition:border-color .15s,box-shadow .15s}
input:focus{outline:0;border-color:var(--primary);box-shadow:0 0 0 3px rgba(4,120,87,.15)}
.sub{margin:0 0 20px}
.sw-row{display:flex;align-items:center;gap:12px;font-weight:600;font-size:14px;cursor:pointer}
.sw{appearance:none;-webkit-appearance:none;flex:none;position:relative;width:44px;height:26px;margin:0;border-radius:99px;background:#cbd5e1;cursor:pointer;transition:background .2s}
.sw::after{content:"";position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:50%;background:#fff;box-shadow:0 1px 3px rgba(15,23,42,.3);transition:transform .2s}
.sw:checked{background:var(--primary)}
.sw:checked::after{transform:translateX(18px)}
.brk{display:flex;align-items:flex-end;gap:10px;margin-bottom:10px}
.brk .f{flex:1;margin:0}
.brk .f span{font-size:12px;color:var(--muted);font-weight:600}
#brkset.off #brk,#brkset.off #addBrk{opacity:.4;pointer-events:none}
.btn{height:46px;padding:0 18px;border:1.5px solid var(--line);border-radius:var(--radius-sm);background:#fff;color:var(--ink);font:inherit;font-weight:600;cursor:pointer;transition:border-color .15s,color .15s,background .15s}
.btn:hover{border-color:var(--primary);color:var(--primary-dark)}
.btn.ghost{background:var(--bg);border-color:transparent}
.btn.sq{width:46px;padding:0;font-size:20px;flex:none}

.wrow{display:grid;grid-template-columns:150px repeat(3,1fr);gap:12px;align-items:end;padding:10px 0;border-bottom:1px solid var(--line)}
.wrow.off .f{opacity:.45}
.wrow .sw-row{height:46px}
.wrow .f span{font-size:12px;color:var(--muted);font-weight:600}
.wrow .f{margin:0}

.out{margin-top:26px;display:grid;gap:14px}
.hero{background:var(--primary-soft);box-shadow:inset 0 0 0 1px rgba(4,120,87,.2);border-radius:var(--radius);padding:26px 24px}
.hero small{display:block;color:var(--primary-dark);font-weight:600;font-size:14px}
.hero b{display:block;font-size:48px;line-height:1.1;font-weight:800;color:var(--primary-dark);letter-spacing:-.02em;margin:4px 0}
.hero em{font-style:normal;color:var(--primary-dark);font-weight:600}
.ot{border-radius:var(--radius);padding:18px 24px;font-size:22px;font-weight:800;background:var(--bg);color:var(--muted)}
.ot.pos{background:var(--primary-soft);color:var(--primary-dark)}
.ot.neg{background:#fef2f2;color:var(--danger)}
.details{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px}
.det{border:1.5px solid var(--line);border-radius:var(--radius-sm);padding:14px 16px}
.det small{display:block;color:var(--muted);font-size:13px;font-weight:600}
.det b{font-size:20px;font-weight:700}
.det span{display:block;font-size:12px;color:var(--muted)}
.banner{border-radius:var(--radius-sm);padding:12px 16px;font-weight:600;font-size:15px}
.banner.bad{background:#fef2f2;color:var(--danger);box-shadow:inset 0 0 0 1px rgba(185,28,28,.25)}
.banner.warn{background:#fffbeb;color:#92400e;box-shadow:inset 0 0 0 1px rgba(217,119,6,.3)}
.tl{display:flex;height:22px;border-radius:99px;overflow:hidden;background:var(--line)}
.tl i{display:block;height:100%}
.tl .w{background:var(--primary)}.tl .p{background:var(--accent)}
.legend{display:flex;gap:16px;font-size:13px;color:var(--muted);margin-top:6px}
.legend i{display:inline-block;width:10px;height:10px;border-radius:50%;margin-right:6px}
table{width:100%;border-collapse:collapse;font-size:15px}
th,td{padding:9px 12px;text-align:left;border-bottom:1px solid var(--line)}
th{color:var(--muted);font-size:13px}
td:last-child,th:last-child{text-align:right}
tr.off td{color:var(--muted)}

.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px;padding-top:22px;border-top:1px solid var(--line)}
.toast{min-height:22px;margin:12px 0 0;color:var(--primary-dark);font-weight:600;font-size:14px}
.hist h3{font-size:15px;margin:10px 0 6px}
.hist ul{margin:0;padding-left:18px;color:var(--muted);font-size:14px}

.hub{padding:56px 0 8px}
.hub-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.hub-card{position:relative;display:block;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:20px 52px 20px 22px;text-decoration:none;color:var(--ink);transition:transform .18s,box-shadow .18s}
.hub-card strong{display:block;font-size:17px;margin-bottom:4px}
.hub-card span{color:var(--muted);font-size:15px}
.hub-card i{position:absolute;right:20px;top:50%;transform:translateY(-50%);font-style:normal;font-size:22px;color:var(--primary);transition:transform .18s}
.hub-card:hover{transform:translateY(-3px);box-shadow:0 2px 4px rgba(15,23,42,.08),0 18px 36px -16px rgba(4,120,87,.35)}
.hub-card:hover i{transform:translate(4px,-50%)}

.formula{padding:48px 0 8px}
.formula ul{margin:0;padding:0;list-style:none;display:grid;gap:10px}
.formula li{background:#fff;border-left:4px solid var(--primary);border-radius:var(--radius-sm);padding:14px 18px;box-shadow:var(--shadow)}

.faq{padding:48px 0 64px}
.qa{background:#fff;border-radius:var(--radius-sm);box-shadow:var(--shadow);margin-bottom:10px;overflow:hidden}
.qa h3{margin:0;font-size:inherit}
.qa button{display:flex;justify-content:space-between;align-items:center;gap:16px;width:100%;padding:16px 20px;border:0;background:none;font:inherit;font-weight:700;text-align:left;cursor:pointer;color:var(--ink)}
.qa button::after{content:"+";flex:none;display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:var(--primary-soft);color:var(--primary);font-size:20px;line-height:1;transition:transform .25s,background .25s}
.qa button[aria-expanded=true]::after{content:"−";background:var(--primary);color:#fff;transform:rotate(180deg)}
.ans{display:grid;grid-template-rows:0fr;transition:grid-template-rows .28s ease}
.ans>p{overflow:hidden;margin:0;padding:0 20px;color:var(--muted);min-height:0}
.qa.open .ans{grid-template-rows:1fr}
.qa.open .ans>p{padding-bottom:18px}

.ftr{background:var(--ink);color:#cbd5e1;padding:36px 0;font-size:14px}
.ftr p{margin:0 0 10px;max-width:75ch}
.ftr a{color:#fff}

@media (max-width:720px){
 .hub-grid{grid-template-columns:1fr}
 .wrow{grid-template-columns:1fr 1fr 1fr}
 .wrow .sw-row{grid-column:1/-1;height:auto}
 .hdr nav{display:none}
 .hero b{font-size:40px}
 .btn{flex:1 1 calc(50% - 10px)}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
@media print{
 body{background:#fff}
 .hdr,.tabs,.actions,.hub,.formula,.faq,.ftr,.toast,.hist,.intro p,form .grid,form fieldset,form .sub,.wrow,#addBrk{display:none!important}
 .card{box-shadow:none}.tool{padding:0}
 .hero,.ot,.banner{-webkit-print-color-adjust:exact;print-color-adjust:exact}
}