:root{--ink:#14203a;--grey:#55607a;--line:#d7dde8;--soft:#eef2f8;--paper:#fff;--accent:#1c4dd9;--accent-dark:#163db0;--err:#b42318;--ok:#11703f;--sans:system-ui,-apple-system,"Segoe UI",Roboto,"Noto Sans",Arial,sans-serif;color-scheme:light}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:400 16px/1.55 var(--sans)}
a{color:var(--accent)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
h1,h2,h3{margin:0;line-height:1.15;font-weight:700;letter-spacing:-.015em}
h1{font-size:clamp(30px,4.4vw,44px)}
h2{font-size:24px;margin-top:40px}
h3{font-size:18px;margin-top:24px}
p{margin:10px 0 0}
.wrap{max-width:1160px;margin-inline:auto;padding-inline:16px}
.read{max-width:720px}

.top{border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;justify-content:space-between;height:56px}
.brand{font-weight:800;font-size:20px;letter-spacing:-.03em;color:var(--ink);text-decoration:none}
.brand b{color:var(--accent);font-weight:800}
.top nav a{color:var(--ink);text-decoration:none;font-size:15px}
.top nav a:hover{color:var(--accent)}

.intro{padding-block:32px 20px}
.intro p{color:var(--grey);font-size:18px;max-width:62ch}

.hero{padding-block:clamp(40px,8vw,88px) 24px}
.hero h1{font-size:clamp(38px,6.4vw,68px);max-width:15ch;letter-spacing:-.03em}
.hero p{color:var(--grey);font-size:19px;max-width:52ch}
.tools{list-style:none;margin:24px 0 0;padding:0;border-top:1px solid var(--line)}
.tools li{border-bottom:1px solid var(--line)}
.tools a{display:flex;justify-content:space-between;gap:24px;align-items:baseline;padding-block:20px;color:var(--ink);text-decoration:none}
.tools strong{font-size:21px}
.tools span{color:var(--grey)}
.tools a:hover strong{color:var(--accent)}

.tool{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:32px;align-items:start;padding-bottom:40px}
fieldset{border:0;border-top:1px solid var(--line);margin:0;padding:18px 0}
legend{font-weight:700;font-size:17px;padding:0 10px 0 0}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px 14px;margin-top:8px}
.full{grid-column:1/-1}
label{display:block;font-size:14px;font-weight:600}
label small{font-weight:400;color:var(--grey)}
input[type=text],input[type=month],input[type=date],input:not([type]),textarea{display:block;width:100%;min-height:44px;margin-top:4px;padding:9px 11px;border:1px solid #8a94a8;border-radius:8px;background:#fff;color:var(--ink);font:inherit}
textarea{resize:vertical}
input[type=file]{display:block;margin-top:6px;font-size:14px;max-width:100%}
.row{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr) auto;gap:8px;align-items:center;margin-top:8px}
.row input{margin-top:0}
.r-amount{text-align:right;font-variant-numeric:tabular-nums}
.r-del,.link{background:none;border:0;padding:10px 4px;color:var(--accent);font:inherit;font-size:14px;cursor:pointer;min-height:44px}
.r-del{color:var(--grey)}
.r-del:hover,.link:hover{text-decoration:underline}
.helpers{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.ghost{background:#fff;border:1px solid var(--accent);color:var(--accent);border-radius:8px;padding:9px 14px;font:600 14px var(--sans);cursor:pointer;min-height:44px}
.ghost:hover{background:var(--soft)}
.note{font-size:14px;color:var(--grey);margin-top:8px;min-height:1.4em}
.note.err,#sum-note{color:var(--err)}
.note.ok{color:var(--ok)}
.check{display:flex;gap:10px;align-items:flex-start;font-weight:400;font-size:15px}
.check input{width:20px;height:20px;margin:2px 0 0;flex:none}
.actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:14px}
.btn{background:var(--accent);color:#fff;border:0;border-radius:8px;padding:13px 24px;font:700 16px var(--sans);cursor:pointer;min-height:48px;text-decoration:none;display:inline-block}
.btn:hover{background:var(--accent-dark)}
.btn:active{transform:translateY(1px)}

.preview{position:sticky;top:16px}
.preview>p{font-size:14px;color:var(--grey);margin:0 0 8px}
#paper{background:#fff;border:1px solid var(--line);border-radius:3px;box-shadow:0 14px 34px rgba(20,32,58,.13);padding:26px;font-size:13.5px;min-height:560px}
#paper p{margin:0}
.p-top{display:flex;justify-content:space-between;gap:16px;padding-bottom:14px;border-bottom:1px solid var(--line)}
.p-co{display:flex;gap:12px;min-width:0}
.p-logo{max-width:90px;max-height:52px;object-fit:contain}
.p-name{font-weight:700;font-size:17px;overflow-wrap:anywhere}
.p-addr{color:var(--grey);font-size:12px;white-space:pre-line}
.p-title{text-align:right;flex:none}
.p-big{font-weight:700;font-size:20px}
.p-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:6px 18px;margin:14px 0}
.p-grid div{display:flex;gap:8px;min-width:0}
.p-grid dt{color:var(--grey);font-size:11.5px;flex:0 0 92px;padding-top:1px}
.p-grid dd{margin:0;overflow-wrap:anywhere}
.p-table{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.p-row{display:flex;justify-content:space-between;gap:8px;padding:6px 8px;font-variant-numeric:tabular-nums}
.p-row span:first-child{overflow-wrap:anywhere}
.p-head{background:var(--soft);font-weight:700;font-size:12.5px}
.p-total{border-top:1px solid var(--line);font-weight:700}
.p-net{display:flex;justify-content:space-between;align-items:center;background:var(--accent);color:#fff;padding:11px 14px;margin-top:16px;font-weight:700}
.p-net strong{font-size:20px;font-variant-numeric:tabular-nums}
.p-words{color:var(--grey);font-size:12px;margin-top:8px!important}

.bar{display:none}
.guide{padding-bottom:56px}
.guide ol,.guide ul{padding-left:22px}
.guide li{margin-top:6px}
.sum{border-collapse:collapse;width:100%;margin-top:14px}
.sum th,.sum td{padding:9px 8px;border-bottom:1px solid var(--line);text-align:left}
.sum td:last-child,.sum th:last-child{text-align:right;font-variant-numeric:tabular-nums}
details{border-top:1px solid var(--line);padding-block:14px}
details:last-of-type{border-bottom:1px solid var(--line)}
summary{cursor:pointer;font-weight:600}
.warn{background:var(--soft);padding:14px 16px;border-radius:8px;margin-top:18px}

footer{background:var(--soft);padding:24px 0 32px;font-size:14px;color:var(--grey)}
footer .wrap{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px 32px}
footer nav{display:flex;flex-wrap:wrap;gap:6px 18px}
footer a{color:var(--grey)}

@media (max-width:880px){
  .tool{grid-template-columns:minmax(0,1fr)}
  .preview{position:static}
  #paper{padding:16px;min-height:0}
  .bar{display:flex;position:sticky;bottom:0;justify-content:space-between;align-items:center;background:var(--ink);color:#fff;padding:10px 16px;z-index:5}
  .bar a{color:#fff;font-weight:600}
}
@media (max-width:480px){
  .grid{grid-template-columns:minmax(0,1fr)}
  .full{grid-column:auto}
  .p-grid,.p-table{grid-template-columns:minmax(0,1fr)}
  .tools a{flex-direction:column;gap:2px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}

/* Hub */
.hub-hero{background:var(--ink);color:#fff}
.hub-hero .wrap{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);gap:44px;align-items:center;padding-block:clamp(40px,7vw,72px)}
.hub-hero h1{font-size:clamp(38px,5.8vw,64px);letter-spacing:-.03em;line-height:1.03}
.hub-hero p{color:#c9d1e3;font-size:19px;max-width:50ch;margin-top:14px}
.search{position:relative;max-width:540px;margin-top:24px}
.search img{position:absolute;left:16px;top:17px;width:22px;height:22px}
.search input{width:100%;height:56px;padding:0 16px 0 48px;border:0;border-radius:10px;font:inherit;font-size:17px;color:var(--ink);background:#fff}
.fast{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.fast a{color:#fff;font-size:14px;font-weight:600;text-decoration:none;border:1px solid #47557a;border-radius:8px;padding:10px 14px}
.fast a:hover{background:#fff;color:var(--ink)}
.mock{background:#fff;color:var(--ink);padding:22px;border-radius:3px;font-size:13px;box-shadow:0 18px 40px rgba(0,0,0,.35);transform:rotate(1.4deg)}
.mock b{font-size:17px}
.mock .row2{display:flex;justify-content:space-between;padding:6px 0;border-bottom:1px solid var(--line);font-variant-numeric:tabular-nums}
.mock .tot{display:flex;justify-content:space-between;background:var(--accent);color:#fff;padding:10px 12px;margin-top:12px;font-weight:700}
.mock small{color:var(--grey);display:block}
.bar-row{display:flex;flex-wrap:wrap;align-items:end;justify-content:space-between;gap:14px}
.cats{display:flex;flex-wrap:wrap;gap:8px}
.cats button,.seg button,.chips button{background:var(--soft);border:0;border-radius:8px;padding:10px 15px;font:600 14px var(--sans);cursor:pointer;color:var(--ink);min-height:44px}
[aria-pressed=true]{background:var(--ink)!important;color:#fff!important}
.tgrid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin-top:20px}
.tool-card{display:flex;gap:14px;padding:18px;border:1px solid var(--line);border-radius:10px;color:var(--ink);text-decoration:none;transition:border-color .15s}
.tool-card:hover{border-color:var(--accent)}
.tool-card span.t{display:block;font-weight:700;font-size:18px}
.tool-card span.d{display:block;color:var(--grey);font-size:15px;margin-top:3px}
.ico{flex:none;width:46px;height:46px;border-radius:9px;display:grid;place-items:center;background:#dde6ff}
.ico img{width:26px;height:26px}
.c-hr .ico{background:#ffe7c2}
.c-calc .ico{background:#cdf1dd}
.sec{padding-block:clamp(34px,6vw,60px)}
.band{background:var(--soft)}
.points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:30px;margin-top:20px}
.points img{width:30px;height:30px}
.points h3{margin-top:8px}
.points p{color:var(--grey);margin-top:4px}
.related{padding-block:10px 56px}

/* Documents */
.item{display:grid;grid-template-columns:minmax(0,2.3fr) minmax(0,1fr) minmax(0,.7fr) minmax(0,1fr) minmax(0,.8fr) auto;gap:6px;align-items:center;margin-top:8px}
.item input{margin-top:0;padding-inline:8px}
.i-qty,.i-rate,.i-tax{text-align:right;font-variant-numeric:tabular-nums}
select{display:block;width:100%;min-height:44px;margin-top:4px;padding:9px 11px;border:1px solid #8a94a8;border-radius:8px;background:#fff;color:var(--ink);font:inherit}
input[type=number]{display:block;width:100%;min-height:44px;margin-top:4px;padding:9px 11px;border:1px solid #8a94a8;border-radius:8px;background:#fff;color:var(--ink);font:inherit}
.p-to{margin:12px 0;padding-bottom:10px}
.p-strong{font-weight:700}
.p-items{width:100%;border-collapse:collapse;font-size:12.5px;font-variant-numeric:tabular-nums}
.p-items th{background:var(--soft);text-align:right;padding:6px}
.p-items td{padding:6px;text-align:right;border-bottom:1px solid var(--line)}
.p-items th:first-child,.p-items td:first-child{text-align:left;overflow-wrap:anywhere}
.p-sum{margin:10px 0 0 auto;max-width:280px}
.p-sum .p-row{padding:3px 6px}
.p-para{margin-top:10px!important;line-height:1.5}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:6px}
.seg{display:flex;flex-wrap:wrap;gap:8px;margin-top:6px}
.lab{font-size:14px;font-weight:600;margin-top:16px}
.panel{border:1px solid var(--line);border-radius:10px;padding:20px}
.panel.side{background:var(--soft);border:0;position:sticky;top:16px}
.big{font-size:34px;font-weight:800;letter-spacing:-.03em;font-variant-numeric:tabular-nums;line-height:1.1}
.lines{margin:14px 0 0}
.lines div{display:flex;justify-content:space-between;gap:12px;padding:9px 0;border-top:1px solid var(--line)}
.lines dt{color:var(--grey)}
.lines dd{margin:0;font-weight:700;font-variant-numeric:tabular-nums}
@media (max-width:880px){
  .hub-hero .wrap{grid-template-columns:minmax(0,1fr)}
  .mock{transform:none}
  .tgrid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .points{grid-template-columns:minmax(0,1fr)}
  .panel.side{position:static}
}
@media (max-width:560px){
  .tgrid{grid-template-columns:minmax(0,1fr)}
  .item{grid-template-columns:repeat(3,minmax(0,1fr));padding-bottom:10px;border-bottom:1px solid var(--line)}
  .i-desc{grid-column:1/-1}
  .i-hsn{grid-column:1/-1}
  .top nav a.opt{display:none}
}
.next{margin-top:12px;padding:14px 16px;background:#eaf0ff;border-radius:8px}
.next div{display:flex;flex-wrap:wrap;gap:6px 18px;margin-top:6px}
.next a{font-weight:600}
.top nav{display:flex;gap:20px;flex-wrap:nowrap}
.kitband{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:18px;background:#eaf0ff;border-radius:10px;padding:26px}
.kitband p{color:var(--grey);max-width:60ch}