:root{
  --bg:#f3f4f2; --panel:#ffffff; --ink:#1d2321; --muted:#5f6a66; --line:#d6dbd8;
  --accent:#b8321f; --accent-ink:#ffffff; --ok:#1f7a4d; --ok-bg:#e3f2ea; --warn:#9a5b00; --warn-bg:#fbefd9;
  --field:#fafbfa;
  --f-body:"IBM Plex Sans","Noto Sans Sinhala",system-ui,sans-serif;
  --f-mono:"IBM Plex Mono",ui-monospace,monospace;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --bg:#141817; --panel:#1d2321; --ink:#e7ecea; --muted:#9aa6a1; --line:#33403b;
  --accent:#e0644e; --accent-ink:#1a0d0a; --ok:#6cd39e; --ok-bg:#183326; --warn:#f0b65a; --warn-bg:#3a2b12; --field:#171c1a; color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#141817; --panel:#1d2321; --ink:#e7ecea; --muted:#9aa6a1; --line:#33403b;
  --accent:#e0644e; --accent-ink:#1a0d0a; --ok:#6cd39e; --ok-bg:#183326; --warn:#f0b65a; --warn-bg:#3a2b12; --field:#171c1a; color-scheme:dark}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--f-body);font-size:15px;line-height:1.45}
img{max-width:100%}
[hidden]{display:none!important}
.wrap{max-width:1180px;margin:0 auto;padding-block:16px 48px;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
header{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px 16px;margin-bottom:12px}
h1{font-size:22px;margin:0;letter-spacing:.01em;text-wrap:balance}
h1 b{color:var(--accent)}
.sub{color:var(--muted);font-size:13px}
nav{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:16px}
nav button{background:transparent;border:1px solid var(--line);color:var(--ink);padding:8px 14px;border-radius:6px;font:inherit;font-weight:600;cursor:pointer}
nav button[aria-pressed="true"],.btns .btn[aria-pressed="true"]{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:18px;align-items:start}
@media (max-width:860px){.grid{grid-template-columns:minmax(0,1fr)}}
section.panel{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:16px;display:flex;flex-direction:column;gap:14px;min-width:0}
h2{font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:0}
.row{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px}
label{display:flex;flex-direction:column;gap:4px;font-size:12.5px;color:var(--muted);font-weight:500}
input,select,textarea{font:inherit;color:var(--ink);background:var(--field);border:1px solid var(--line);border-radius:6px;padding:8px 10px;min-width:0;width:100%;box-sizing:border-box}
input[type=number]{font-variant-numeric:tabular-nums}
input:focus,select:focus,textarea:focus,button:focus-visible{outline:2px solid var(--accent);outline-offset:1px}
.btn{font:inherit;font-weight:600;border-radius:6px;padding:9px 14px;cursor:pointer;border:1px solid var(--line);background:var(--panel);color:var(--ink)}
.btn.primary{background:var(--accent);color:var(--accent-ink);border-color:var(--accent)}
.btn.small{padding:5px 9px;font-size:13px}
.btn:disabled{cursor:default;opacity:.55}
.btns{display:flex;flex-wrap:wrap;gap:8px}
.pill{display:inline-flex;align-items:center;gap:6px;font-size:13px;font-weight:600;padding:5px 10px;border-radius:999px}
.pill.ok{background:var(--ok-bg);color:var(--ok)}
.pill.warn{background:var(--warn-bg);color:var(--warn)}
.tbl{overflow-x:auto}
table{border-collapse:collapse;width:100%;font-variant-numeric:tabular-nums}
th,td{padding:6px 6px;border-bottom:1px solid var(--line);text-align:left;vertical-align:middle}
th{font-size:11.5px;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);font-weight:600}
td.n,th.n{text-align:right}
.items td input{padding:6px 7px}
.items td:nth-child(1){min-width:150px}
.items td:nth-child(2),.items td:nth-child(3),.items td:nth-child(4){width:90px;min-width:80px}
.chk{display:flex;flex-direction:row;align-items:center;gap:6px;color:var(--ink);font-size:13px}
.chk input{width:auto}
.calc{border:1px dashed var(--line);border-radius:6px;padding:12px;display:flex;flex-direction:column;gap:10px}
.calc .res{font-family:var(--f-mono);font-size:14px}
.bill{font-variant-numeric:tabular-nums}
.bill .head{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;border-bottom:2px solid var(--ink);padding-bottom:10px}
.bill .co{font-weight:700;font-size:16px}
.bill .meta{font-size:13px;color:var(--muted)}
.bill .jobno{font-family:var(--f-mono);font-size:15px;color:var(--accent);text-align:right}
.free{color:var(--ok);font-weight:700}
.tot td{border:none;padding:3px 6px}
.tot .grand td{font-size:17px;font-weight:700;border-top:2px solid var(--ink);padding-top:8px}
.sign{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:28px;font-size:12.5px;color:var(--muted)}
.sign div{border-top:1px solid var(--muted);padding-top:4px}
.note{font-size:13px;color:var(--muted)}
.banner{background:var(--warn-bg);color:var(--warn);padding:8px 12px;border-radius:6px;font-size:13px;margin-bottom:12px}
.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(16px + env(safe-area-inset-bottom,0px));background:var(--ink);color:var(--bg);padding:10px 16px;border-radius:6px;font-weight:600;z-index:30}
.list-empty{color:var(--muted);font-size:14px;padding:10px 0}
.paperwrap{overflow-x:auto}
.paper{--ink:#1d2321;--muted:#5a6561;--line:#cfd5d2;--ok:#1f7a4d;--ok-bg:#e3f2ea;--warn:#9a5b00;--warn-bg:#fbefd9;--accent:#b8321f;
  background:#ffffff;color:var(--ink);border:1px solid var(--line);border-radius:4px;padding:22px;display:flex;flex-direction:column;gap:12px;min-width:0;color-scheme:light}
.doc-title{font-size:18px;font-weight:700;letter-spacing:.08em}
.tick{display:inline-block;width:14px;height:14px;border:1.5px solid var(--ink);border-radius:2px;vertical-align:-2px;margin-right:8px}
.blank{display:inline-block;min-width:90px;border-bottom:1px solid var(--muted)}
.stack{display:flex;flex-direction:column;gap:18px}
.steps li input{width:100%}
.confirm{display:flex;gap:6px;align-items:center;flex-wrap:wrap;font-size:13px}
.account{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.who{font-weight:600}
.err{color:var(--accent);font-weight:600;font-size:13px;min-height:1.2em}
.gate{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}
.gate-card{width:min(440px,100%);background:var(--panel);border:1px solid var(--line);border-top:4px solid var(--accent);border-radius:8px;padding:22px;display:flex;flex-direction:column;gap:12px}
.modal-back{position:fixed;inset:0;background:rgba(0,0,0,.45);display:flex;align-items:center;justify-content:center;padding:16px;z-index:20}
.modal{width:min(440px,100%);background:var(--panel);color:var(--ink);border:1px solid var(--line);border-radius:8px;padding:18px;display:flex;flex-direction:column;gap:12px}
.perm-row{display:grid;grid-template-columns:minmax(0,1fr) auto auto;gap:8px 14px;align-items:center;padding:8px 0;border-bottom:1px solid var(--line)}
.perm-row b{color:var(--ink);font-size:14px}
@media (max-width:600px){
  .perm-row{grid-template-columns:1fr 1fr}
  .perm-row b{grid-column:1 / -1}
}
.readonly input:disabled,.readonly select:disabled,.readonly textarea:disabled{opacity:1;color:var(--ink);cursor:default}
.readonly .needs-edit{display:none!important}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}