:root{
  --ink:#14232B;--paper:#F1F4F5;--card:#FFFFFF;--line:#D3DCE0;--muted:#586C75;
  --accent:#0B6E8F;--accent-ink:#FFFFFF;--accent-soft:#DCEEF4;
  --danger:#C62828;--danger-soft:#FBE4E4;--warn:#B45309;--warn-soft:#FCEBD3;--ok:#2E7D32;--ok-soft:#DFF0E0;--violet:#6D4AA8;
  --nav:#14232B;--nav-ink:#C8D6DC;--shadow:0 1px 0 rgba(20,35,43,.06);
  --font:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Nirmala UI","Noto Sans Bengali","Hind Siliguri",sans-serif;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){--ink:#E6EEF1;--paper:#0E181D;--card:#17262D;--line:#2B3F48;--muted:#9BB0B8;
    --accent:#52B6D6;--accent-ink:#06222C;--accent-soft:#16384A;--danger:#FF8A80;--danger-soft:#3C1E1E;
    --warn:#F2B25C;--warn-soft:#3A2A12;--ok:#7FD086;--ok-soft:#183A1C;--violet:#B79AF0;--nav:#0A1215;--nav-ink:#9BB0B8}
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font);font-size:16px;line-height:1.5}
body{min-height:100dvh;padding-bottom:calc(72px + env(safe-area-inset-bottom))}
body.login{padding-bottom:0}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.wrap{max-width:560px;margin:0 auto;padding:0 16px}

/* top bar */
.top{position:sticky;top:0;z-index:5;background:var(--nav);color:#fff;padding:calc(10px + env(safe-area-inset-top)) 0 10px}
.top .wrap{display:flex;align-items:center;gap:10px}
.top h1{font-size:18px;margin:0;flex:1;font-weight:700;letter-spacing:.2px}
.top .who{font-size:13px;color:var(--nav-ink)}
.icon-btn{background:transparent;border:0;color:#fff;width:44px;height:44px;border-radius:12px;display:grid;place-items:center}
.icon-btn:active{background:rgba(255,255,255,.12)}
.dot{width:10px;height:10px;border-radius:50%;background:#58C26B;display:inline-block}
.dot.off{background:#E3A23B}
.pending-badge{background:var(--warn);color:#fff;border-radius:999px;font-size:12px;padding:2px 9px;font-weight:600}

/* bottom nav */
.nav{position:fixed;left:0;right:0;bottom:0;z-index:5;background:var(--nav);padding-bottom:env(safe-area-inset-bottom)}
.nav .wrap{display:grid;grid-template-columns:repeat(var(--tabs,4),1fr);padding:0}
.nav button{background:none;border:0;color:var(--nav-ink);padding:9px 2px 8px;display:flex;flex-direction:column;align-items:center;gap:2px;font-size:12px;min-height:60px;position:relative}
.nav button svg{width:24px;height:24px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.nav button[aria-current="page"]{color:#fff;font-weight:700}
.nav button[aria-current="page"]::before{content:"";position:absolute;top:0;left:30%;right:30%;height:3px;border-radius:0 0 3px 3px;background:#5CC8E8}

/* generic */
main{padding-top:14px}
h2{font-size:20px;margin:6px 0 10px}
.muted{color:var(--muted)}
.small{font-size:13px}
.row{display:flex;align-items:center;gap:8px}
.between{justify-content:space-between}
.grow{flex:1}
.gap{margin-top:12px}
.btn{border:0;border-radius:12px;padding:12px 16px;min-height:48px;font-weight:700;background:var(--accent);color:var(--accent-ink)}
.btn.secondary{background:transparent;color:var(--accent);border:2px solid var(--accent)}
.btn.quiet{background:var(--accent-soft);color:var(--accent)}
.btn.danger{background:var(--danger);color:#fff}
.btn.block{width:100%}
.btn:disabled{opacity:.55}
.seg{display:flex;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:3px;gap:3px}
.seg button{flex:1;border:0;background:transparent;border-radius:9px;padding:9px 6px;min-height:44px;font-weight:600;color:var(--muted)}
.seg button[aria-pressed="true"]{background:var(--accent);color:var(--accent-ink)}
.group-title{font-size:14px;font-weight:700;color:var(--muted);margin:20px 2px 8px;display:flex;justify-content:space-between}
.empty{background:var(--card);border:1px dashed var(--line);border-radius:14px;padding:26px 16px;text-align:center;color:var(--muted)}
.chip{display:inline-block;border-radius:6px;padding:1px 8px;font-size:12px;font-weight:700;background:var(--accent-soft);color:var(--accent)}
.chip.red{background:var(--danger-soft);color:var(--danger)}
.chip.amber{background:var(--warn-soft);color:var(--warn)}
.chip.green{background:var(--ok-soft);color:var(--ok)}
.chip.grey{background:var(--line);color:var(--muted)}

/* task cards: left stripe encodes priority */
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;box-shadow:var(--shadow);margin-bottom:10px;position:relative;overflow:hidden}
.task{display:block;width:100%;text-align:left;padding:12px 14px 12px 18px}
.task::before{content:"";position:absolute;left:0;top:0;bottom:0;width:6px;background:var(--accent)}
.task.p-High::before{background:var(--warn)}
.task.p-Urgent::before,.task.p-Emergency::before{background:var(--danger)}
.task.p-Emergency{background:var(--danger-soft)}
.task.done{opacity:.72}
.task .subject{font-weight:700;font-size:17px;margin:6px 0 2px}
.task .line{color:var(--muted);font-size:14px}
.task .text{margin-top:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;white-space:pre-line}
.who-tag{font-weight:700;color:var(--ink)}

/* expense rows */
.exp{padding:12px 14px}
.exp .amt{font-weight:800;font-size:18px;font-variant-numeric:tabular-nums;white-space:nowrap}
.exp .purpose{white-space:pre-line;margin:2px 0}
.exp.pending{border-color:var(--warn);background:var(--warn-soft)}
.thumb{width:56px;height:56px;border-radius:8px;object-fit:cover;border:1px solid var(--line);background:var(--line)}

/* ledger: the balance reads like a hand-kept cash page */
.ledger{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:6px 16px 14px}
.ledger .l{display:flex;justify-content:space-between;align-items:baseline;gap:10px;padding:11px 0;border-bottom:1px dotted var(--line)}
.ledger .l .sign{width:18px;color:var(--muted);font-weight:700}
.ledger .l .name{flex:1}
.ledger .l .val{font-variant-numeric:tabular-nums;font-weight:700}
.ledger .total{border-top:3px double var(--ink);border-bottom:0;margin-top:6px;padding-top:12px}
.ledger .total .val{font-size:30px;font-weight:800}
.ledger .neg{color:var(--danger)}
.note{border-radius:12px;padding:10px 12px;margin-top:12px;font-size:14px;background:var(--accent-soft);color:var(--ink)}
.note.red{background:var(--danger-soft)}

/* forms & sheets */
label.f{display:block;margin-top:14px;font-weight:600;font-size:14px}
label.f .opt{font-weight:400;color:var(--muted)}
input[type=text],input[type=password],input[type=date],input[type=number],input[type=search],select,textarea{width:100%;margin-top:5px;background:var(--card);border:1.5px solid var(--line);border-radius:10px;padding:12px;min-height:48px}
textarea{min-height:92px;resize:vertical}
input:focus,select:focus,textarea:focus{border-color:var(--accent);outline:none;box-shadow:0 0 0 3px var(--accent-soft)}
.err{color:var(--danger);background:var(--danger-soft);border-radius:10px;padding:10px 12px;margin-top:12px;font-weight:600}
.sheet-bg{position:fixed;inset:0;background:rgba(10,18,22,.55);z-index:20;display:flex;align-items:flex-end;justify-content:center}
.sheet{background:var(--paper);width:100%;max-width:600px;max-height:94dvh;overflow:auto;border-radius:20px 20px 0 0;padding:6px 16px calc(20px + env(safe-area-inset-bottom));animation:up .18s ease-out}
.sheet-head{position:sticky;top:0;background:var(--paper);display:flex;align-items:center;gap:8px;padding:10px 0;z-index:1}
.sheet-head h3{margin:0;flex:1;font-size:18px}
.sheet-head .icon-btn{color:var(--ink)}
@keyframes up{from{transform:translateY(24px);opacity:.4}to{transform:none;opacity:1}}
.kv{display:grid;grid-template-columns:110px 1fr;gap:6px 10px;margin:8px 0}
.kv dt{color:var(--muted);font-size:14px}
.kv dd{margin:0;font-weight:600}
.instr{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px;white-space:pre-line}
.cmt{border-left:3px solid var(--line);padding:2px 0 2px 10px;margin:10px 0}
.status-bar{position:sticky;bottom:calc(-20px - env(safe-area-inset-bottom));background:var(--paper);margin:10px -16px 0;padding:8px 16px calc(14px + env(safe-area-inset-bottom));box-shadow:0 -6px 12px -8px rgba(0,0,0,.25);z-index:2}
.status-bar .status-row{margin-top:0}
.status-row{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:10px}
.status-row .btn{padding:10px 4px;font-size:14px}
.preview{margin-top:8px;display:flex;gap:10px;align-items:center}
.preview img{width:84px;height:84px;object-fit:cover;border-radius:10px;border:1px solid var(--line)}
.total-line{margin-top:14px;padding:10px 12px;border-radius:10px;background:var(--accent-soft);display:flex;justify-content:space-between;font-weight:700}

/* alarm */
.alarm{position:fixed;inset:0;z-index:40;background:var(--danger);color:#fff;display:flex;flex-direction:column;justify-content:center;padding:28px;gap:14px;animation:pulse 1.1s ease-in-out infinite alternate}
.alarm h2{font-size:30px;margin:0}
.alarm p{font-size:18px;margin:0;white-space:pre-line}
.alarm .btn{background:#fff;color:var(--danger);font-size:18px;min-height:56px}
@keyframes pulse{from{filter:brightness(1)}to{filter:brightness(1.18)}}

#toast{position:fixed;left:16px;right:16px;bottom:calc(84px + env(safe-area-inset-bottom));z-index:50;display:flex;justify-content:center;pointer-events:none}
#toast div{background:var(--ink);color:var(--paper);padding:11px 16px;border-radius:12px;max-width:520px;font-weight:600;box-shadow:0 6px 20px rgba(0,0,0,.25)}

/* login */
.login-box{max-width:420px;margin:0 auto;padding:calc(40px + env(safe-area-inset-top)) 20px 30px}
.brand{display:flex;align-items:center;gap:12px;margin-bottom:26px}
.brand img{width:54px;height:54px;border-radius:14px}
.brand b{font-size:24px;display:block;line-height:1.1}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* wide screens (PC / tablet): use the window, lay cards out in columns */
.cards{display:block}
.narrow{max-width:640px}
.seg,.actions{max-width:560px}
@media (min-width:720px){
  .wrap{max-width:1000px;padding:0 24px}
  .cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(330px,1fr));gap:14px;align-items:start}
  .cards>.card{margin-bottom:0}
  .cards>.group-title,.cards>.empty{grid-column:1/-1}
  .nav .wrap{max-width:640px}
  .sheet-bg{align-items:center}
  .sheet{max-width:720px;max-height:90dvh;border-radius:20px;padding-bottom:22px}
  .task .subject{font-size:18px}
}
@media (min-width:1200px){
  .wrap{max-width:1280px}
  .cards{grid-template-columns:repeat(auto-fill,minmax(360px,1fr))}
}

.brand-wrap{display:flex;flex-direction:column;gap:8px;margin-bottom:26px}
.brand-logo{width:100%;max-width:300px;height:auto;background:#fff;border-radius:14px;padding:10px 14px;border:1px solid var(--line)}
.brand-name{font-size:24px;line-height:1.2}

.amt.neg{color:var(--bad,#C0392B)}
.top .chip{font-size:11px;padding:2px 8px}