:root{color-scheme:light;--line:#e4ebf0;--pale:#eaf2f7;--paper:#fff}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
a{color:var(--blue);text-underline-offset:3px}
.wrap,main{max-width:960px;margin:0 auto;padding:0 20px}
.hero{background:linear-gradient(135deg,var(--blue),var(--blue-dark));color:#fff;padding:30px 0 34px}
.hero-bar{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:14px;margin-bottom:22px}
.hero-path{font-size:14px;color:rgba(255,255,255,.85)}
.hero-path a{color:inherit}
.language-switch{display:flex;gap:6px;flex-wrap:wrap}
.language-switch a{display:inline-flex;align-items:center;justify-content:center;min-width:44px;min-height:44px;border:1px solid rgba(255,255,255,.4);border-radius:8px;color:#fff;font-size:13px;font-weight:600;text-decoration:none}
.language-switch a:hover{background:rgba(255,255,255,.12)}
.language-switch a[aria-current]{background:#fff;color:var(--blue-dark);font-weight:800}
h1{font-size:clamp(24px,4vw,34px);font-weight:800;line-height:1.25;margin:0 0 12px;max-width:780px}
h2{font-size:22px;line-height:1.35;margin:0 0 20px;font-weight:800}
h3{font-size:18px}
.lead{font-size:18px;line-height:1.6;margin:0;max-width:720px;color:rgba(255,255,255,.95)}
.example-note{font-size:14px;margin:18px 0 0;color:rgba(255,255,255,.85)}
.panel{border:1px solid var(--line);background:var(--paper);padding:28px;margin:24px 0;border-radius:12px}
.setup,.offers{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.bands{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.setup>*,.offers>*,.bands>*{min-width:0}
.offers>fieldset{border-top:3px solid var(--blue);background:var(--bg);padding:24px}
.offers>fieldset:last-child{border-top-color:var(--green)}
fieldset{border:1px solid var(--line);border-radius:12px;min-width:0}
legend{font-weight:700;padding:0 8px}
label{display:block;font-size:15px;font-weight:650;margin:14px 0;color:var(--text)}
input,select,button{font:inherit;font-size:16px}
input[type=number],input[type=text],select{display:block;width:100%;min-height:46px;padding:10px 12px;margin-top:6px;border:1px solid #8298a8;border-radius:8px;color:var(--text);background:#fff}
input[type=checkbox],input[type=radio]{accent-color:var(--blue);width:19px;height:19px;flex-shrink:0}
.file-control{flex:1 1 260px;min-width:0}
.file-label{display:block;font-size:15px;font-weight:650;margin-bottom:10px}
.file-picker{position:relative;display:inline-flex;align-items:center;max-width:100%;min-height:44px;margin:0;padding:10px 16px;border:1px solid var(--blue);border-radius:8px;color:var(--blue);background:#fff;cursor:pointer}
.file-picker:hover{background:var(--pale)}
.file-picker:focus-within{outline:3px solid #9a5700;outline-offset:3px}
.file-picker input[type=file]{position:absolute;inset:0;width:100%;height:100%;margin:0;opacity:0;cursor:pointer}
.file-status{display:block;margin-top:8px;font-size:14px;color:var(--muted);overflow-wrap:anywhere}
.purpose{padding:4px 16px}
.purpose label{display:flex;align-items:center;gap:6px;margin:7px 0;font-weight:500}
.confirm{display:flex;gap:12px;align-items:flex-start;font-weight:500;margin:28px 0}
.confirm input{margin-top:4px}
button{max-width:100%;background:#fff;color:var(--blue);border:1px solid var(--blue);border-radius:8px;padding:11px 16px;cursor:pointer;font-weight:700;min-height:44px}
button:hover{background:var(--pale)}
.primary{background:var(--amber);border-color:var(--amber);color:var(--text);font-weight:800;padding:14px 24px}
.primary:hover{background:#e08c05;border-color:#e08c05}
.quiet{font-size:14px;padding:7px 12px}
.actions,.file-actions{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin:24px 0}
.actions button{font-size:14px}
.metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.metrics>div{background:var(--pale);border-radius:12px;padding:22px 18px;min-width:0}
.metrics span{font-size:13px;display:block;line-height:1.4}
.metrics strong{font-size:clamp(23px,3vw,34px);font-weight:800;font-variant-numeric:tabular-nums;display:block;margin-top:12px;overflow-wrap:anywhere}
.result{border-top:4px solid var(--blue)}
.result>p{font-size:14px}
.notice{padding:16px;background:#fff8ec;color:#6b4610;border-left:3px solid var(--amber);border-radius:0 8px 8px 0}
.table-wrap{overflow:auto}
table{width:100%;border-collapse:collapse;table-layout:fixed}
caption{text-align:left;font-weight:700;padding:16px 0}
td,th{padding:12px 8px;border-bottom:1px solid var(--line);font-size:15px;overflow-wrap:anywhere}
thead th{background:var(--pale)}
th:first-child{text-align:left;width:48%}
td{text-align:right;font-variant-numeric:tabular-nums}
th:not(:first-child){text-align:right}
.notes{max-width:760px;padding:12px 0 20px}
.notes h2{margin-top:28px}
.notes p,.data-panel p{font-size:15px;color:var(--muted)}
.notes a{overflow-wrap:anywhere}
.notes ul{padding-left:22px}
details{margin:24px 0;border-top:1px solid var(--line);padding-top:18px}
summary{cursor:pointer;font-weight:650}
#saved>div{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin:10px 0}
#saved button{font-size:13px;padding:7px 12px}
#saved span{flex:1;font-size:14px}
#status,#storage-status{color:#834005;font-size:15px}
#main,#tariff-form,#results{scroll-margin-top:180px}
button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible,a:focus-visible{outline:3px solid #9a5700;outline-offset:3px}
.hero a:focus-visible{outline-color:var(--amber)}
[hidden]{display:none!important}
@media(max-width:700px){
 .hero{padding:22px 0 28px}
 .hero-bar{gap:14px;margin-bottom:18px}
 .lead{font-size:17px}
 .panel{padding:20px 16px}
 .offers,.setup,.metrics,.bands{grid-template-columns:1fr}
 .offers>fieldset{padding:18px 14px}
 .metrics strong{font-size:32px}
 .metrics>div{padding:16px}
 .actions button{flex:1 1 44%}
}
@media print{
 body{background:#fff;font-size:12px}
 form,.actions,.data-panel,.hero-bar,#share-box,.example-note{display:none!important}
 .hero{padding:0;background:#fff;color:var(--text)}
 .hero .lead{color:var(--muted);font-size:14px}
 h1{font-size:26px}
 .panel{border:0;padding:0;break-inside:avoid}
 .metrics{grid-template-columns:repeat(3,1fr)}
 .notes,.notes p{font-size:10px}
 .notes h2{font-size:14px}
 a{color:inherit;text-decoration:none}
}