:root{
    --ink:#141B33; --slate:#3D5573; --teal:#2EC4B6; --teal-dark:#12A395;
    --paper:#F7F7F2; --paper-dim:#ECEBE3; --amber:#F5A623; --green:#2FA86A; --red:#E1503E; --grey:#8B93A6;
    --line: rgba(28,37,65,0.10);
    font-family:'Inter',system-ui,-apple-system,sans-serif;
  }
  *{box-sizing:border-box;}
  html,body{margin:0;padding:0;height:100%;background:var(--paper);color:var(--ink);}
  body{-webkit-tap-highlight-color:transparent;overscroll-behavior-y:none;padding-bottom:env(safe-area-inset-bottom);}
  h1,h2,h3,.display{font-family:'Space Grotesk',system-ui,sans-serif;letter-spacing:-0.01em;}
  .mono{font-family:'IBM Plex Mono',monospace;font-variant-numeric:tabular-nums;}
  #app{max-width:480px;margin:0 auto;min-height:100vh;display:flex;flex-direction:column;background:var(--paper);position:relative;}

  .topbar{background:var(--ink);color:var(--paper);padding:20px 20px 16px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:5;}
  .topbar h1{font-size:19px;margin:0;font-weight:700;}
  .topbar .sub{font-size:11px;opacity:0.6;margin-top:2px;font-weight:500;}
  .install-btn{background:var(--teal);color:var(--ink);border:none;border-radius:20px;padding:8px 14px;font-size:12px;font-weight:600;font-family:'Inter',system-ui,sans-serif;display:none;align-items:center;gap:6px;cursor:pointer;}
  .install-btn.show{display:inline-flex;}

  main{flex:1;padding:14px 16px 90px;overflow-y:auto;}

  .summary{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:16px;}
  .summary .card{background:white;border-radius:14px;padding:11px 13px;box-shadow:0 1px 2px rgba(28,37,65,0.06);}
  .summary .card.tappable{cursor:pointer;}
  .summary .card .label{font-size:10px;color:var(--slate);font-weight:600;text-transform:uppercase;letter-spacing:.04em;}
  .summary .card .value{font-size:16px;font-weight:600;margin-top:3px;}
  .summary .card.income .value{color:var(--green);}
  .summary .card.due .value{color:var(--amber);}
  .summary .card.expense .value{color:var(--red);}
  .summary .card.net .value{color:var(--ink);}

  .chips{display:flex;gap:6px;margin-bottom:12px;overflow-x:auto;padding-bottom:2px;}
  .chip{white-space:nowrap;padding:6px 13px;border-radius:16px;background:white;border:1.5px solid var(--line);font-size:12.5px;font-weight:600;color:var(--slate);cursor:pointer;}
  .chip.active{background:var(--ink);color:var(--paper);border-color:var(--ink);}

  .search-row{margin-bottom:12px;}
  .search-row input{width:100%;padding:10px 12px;border-radius:10px;border:1.5px solid var(--line);font-size:14px;background:white;}

  .section-label{font-size:12px;font-weight:600;color:var(--slate);text-transform:uppercase;letter-spacing:.05em;margin:6px 2px 10px;}

  .doc-card{background:white;border-radius:14px;padding:13px 15px;margin-bottom:9px;display:flex;align-items:center;justify-content:space-between;box-shadow:0 1px 2px rgba(28,37,65,0.06);cursor:pointer;border-left:4px solid var(--grey);}
  .doc-card.type-invoice.status-unpaid{border-left-color:var(--amber);}
  .doc-card.type-invoice.status-partial{border-left-color:var(--teal-dark);}
  .doc-card.type-invoice.status-overdue{border-left-color:var(--red);}
  .doc-card.type-invoice.status-paid{border-left-color:var(--green);}
  .doc-card.type-order{border-left-color:var(--slate);}
  .doc-card.type-draft{border-left-color:var(--grey);}
  .doc-card .left .num{font-size:10px;font-weight:700;color:var(--grey);text-transform:uppercase;letter-spacing:.04em;}
  .doc-card .left .client{font-weight:600;font-size:14.5px;margin-top:1px;}
  .doc-card .left .date{font-size:11.5px;color:var(--slate);margin-top:2px;}
  .doc-card .right{text-align:right;}
  .doc-card .right .amt{font-weight:600;font-size:14.5px;}
  .doc-card .right .status{font-size:10.5px;font-weight:600;margin-top:3px;padding:2px 8px;border-radius:8px;display:inline-block;}
  .status.paid{background:rgba(76,154,106,0.15);color:var(--green);}
  .status.unpaid{background:rgba(232,163,61,0.18);color:#9c6b1f;}
  .status.partial{background:rgba(91,192,190,0.2);color:var(--teal-dark);}
  .status.overdue{background:rgba(193,83,59,0.15);color:var(--red);}
  .status.draft{background:rgba(139,147,166,0.18);color:var(--slate);}
  .status.order{background:rgba(58,80,107,0.14);color:var(--slate);}
  .status.quote{background:rgba(58,80,107,0.14);color:var(--slate);}
  .status.deliverynote{background:rgba(46,196,182,0.16);color:var(--teal-dark);}
  .status.creditnote{background:rgba(225,80,62,0.14);color:var(--red);}
  .status.purchaseorder{background:rgba(139,147,166,0.18);color:var(--slate);}
  .status.receipt{background:rgba(47,168,106,0.15);color:var(--green);}
  .status.transfer{background:rgba(245,166,35,0.18);color:#9c6b1f;}

  .empty{text-align:center;padding:50px 20px;color:var(--slate);}
  .empty .display{font-size:16px;margin-bottom:6px;color:var(--ink);}
  .empty p{font-size:13px;line-height:1.5;margin:0;}

  .fab-wrap{position:fixed;bottom:78px;right:20px;width:52px;height:52px;z-index:10;}
  .fab-ring{position:absolute;inset:-5px;border-radius:50%;background:conic-gradient(from 0deg, transparent 0%, var(--teal) 18%, #fff 26%, var(--teal) 34%, transparent 55%, transparent 100%);animation:fabSpin 2.2s linear infinite;filter:blur(0.5px);}
  .fab{position:absolute;inset:4px;border-radius:50%;background:var(--ink);color:var(--teal);border:none;font-size:22px;box-shadow:0 6px 16px rgba(28,37,65,0.35);display:flex;align-items:center;justify-content:center;cursor:pointer;z-index:1;}

  .sort-option{display:flex;align-items:center;justify-content:space-between;padding:12px 14px;font-size:14px;color:var(--ink);cursor:pointer;border-bottom:1px solid var(--line);}
  .sort-option:last-child{border-bottom:none;}
  .sort-option:active{background:var(--paper-dim);}
  .sort-radio{width:18px;height:18px;border-radius:50%;border:2px solid var(--line);flex-shrink:0;position:relative;}
  .sort-option.active .sort-radio{border-color:var(--teal-dark);}
  .sort-option.active .sort-radio::after{content:'';position:absolute;inset:3px;border-radius:50%;background:var(--teal-dark);}

  .todo-item{display:flex;align-items:center;gap:12px;padding:13px 14px;background:white;border-radius:12px;margin-bottom:8px;box-shadow:0 1px 3px rgba(28,37,65,0.08);}
  .todo-check{width:24px;height:24px;border-radius:50%;border:2px solid var(--line);flex-shrink:0;cursor:pointer;display:flex;align-items:center;justify-content:center;color:white;}
  .todo-item.done .todo-check{background:var(--teal-dark);border-color:var(--teal-dark);}
  .todo-text{flex:1;font-size:15px;color:var(--ink);word-break:break-word;}
  .todo-item.done .todo-text{color:var(--grey);text-decoration:line-through;}
  .todo-remove{background:none;border:none;color:var(--grey);font-size:18px;cursor:pointer;padding:4px;flex-shrink:0;}
  @keyframes fabSpin{to{transform:rotate(360deg);}}

  .bottom-nav{position:fixed;bottom:0;left:0;right:0;background:white;border-top:1px solid var(--line);display:flex;z-index:9;padding-bottom:env(safe-area-inset-bottom);}
  .bottom-nav-inner{max-width:480px;margin:0 auto;display:flex;width:100%;}
  .nav-btn{flex:1;border:none;background:none;padding:10px 4px 8px;font-size:10.5px;font-weight:600;color:var(--grey);cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:3px;}
  .nav-btn .ic{display:inline-flex;align-items:center;justify-content:center;}
  .nav-btn.active{color:var(--ink);}
  .nav-btn.active .ic{color:var(--teal-dark);}

  .screen{display:none;}
  .screen.active{display:block;}

  .field{margin-bottom:14px;}
  .field label{font-size:12px;font-weight:600;color:var(--slate);display:block;margin-bottom:5px;}
  .field input, .field select, .field textarea{width:100%;padding:12px 12px;border-radius:10px;border:1.5px solid var(--line);font-size:16px;font-family:'Inter',system-ui,sans-serif;background:white;color:var(--ink);}
  .field textarea{resize:vertical;min-height:60px;}
  .field input:focus, .field select:focus, .field textarea:focus{outline:none;border-color:var(--teal);}
  .field-row{display:grid;grid-template-columns:1fr 1fr;gap:10px;}
  .back-row{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
  .back-btn{background:none;border:none;font-size:20px;color:var(--ink);cursor:pointer;padding:4px;}
  .back-row h2{margin:0;font-size:17px;flex:1;}

  .type-select{display:grid;grid-template-columns:repeat(3, 1fr);gap:6px;margin-bottom:16px;background:white;border-radius:12px;padding:6px;}
  .type-select button{padding:10px 4px;border:none;background:var(--paper-dim);border-radius:9px;font-size:11.5px;font-weight:600;color:var(--slate);cursor:pointer;line-height:1.3;text-align:center;}
  .type-select button.active{background:var(--ink);color:var(--paper);}

  .item-row{background:white;border-radius:12px;padding:11px 12px;margin-bottom:8px;position:relative;border:1.5px solid transparent;}
  .item-row.expanded{border-color:var(--teal);}
  .item-summary{display:flex;align-items:center;gap:8px;min-height:36px;}
  .item-summary .s-line{flex:1;font-size:13.5px;font-weight:600;color:var(--ink);overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
  .item-summary .s-line.placeholder{color:var(--grey);font-weight:500;font-style:italic;}
  .paid-chip{display:flex;align-items:center;gap:5px;font-size:11px;font-weight:700;color:var(--grey);flex-shrink:0;cursor:pointer;padding:4px 8px 4px 6px;border-radius:14px;background:var(--paper-dim);}
  .paid-chip input{width:15px;height:15px;accent-color:var(--green);margin:0;}
  .paid-chip.is-paid{color:var(--green);background:rgba(76,154,106,0.15);}
  .s-actions{display:flex;gap:2px;flex-shrink:0;}
  .s-actions button{background:none;border:none;font-size:15px;cursor:pointer;width:32px;height:32px;border-radius:8px;color:var(--slate);}
  .s-actions button.remove-line{color:var(--red);}
  .s-actions button:active{background:var(--paper-dim);}
  .item-detail{display:none;margin-top:10px;padding-top:10px;border-top:1px dashed var(--line);}
  .item-row.expanded .item-detail{display:block;}
  .item-detail .itemName{width:100%;padding:12px 12px;border-radius:10px;border:1.5px solid var(--line);font-size:16px;font-family:'Inter',system-ui,sans-serif;background:white;color:var(--ink);margin-bottom:8px;}
  .item-detail .itemName:focus{outline:none;border-color:var(--teal);}
  .item-row .row2{display:grid;grid-template-columns:1fr 1fr;gap:8px;}
  .item-row .row2 .field{margin-bottom:0;}
  .item-row .row2 input{font-size:16px;}
  .detail-footer{display:flex;align-items:center;justify-content:space-between;margin-top:10px;}
  .line-total{font-size:13px;color:var(--slate);font-weight:600;}
  .collapse-line{background:var(--ink);color:var(--paper);border:none;padding:8px 16px;border-radius:8px;font-weight:600;font-size:12.5px;cursor:pointer;}
  .add-item-btn{width:100%;padding:13px;border-radius:10px;border:1.5px dashed var(--teal-dark);background:transparent;color:var(--teal-dark);font-weight:600;font-size:14px;cursor:pointer;margin-bottom:16px;}

  .payment-box{background:var(--paper-dim);border-radius:12px;padding:12px 14px;margin-top:12px;}
  .payment-box .bal-row{display:flex;justify-content:space-between;font-size:13.5px;margin-bottom:4px;}
  .payment-box .bal-row.balance{font-weight:700;font-size:14.5px;}
  .payment-box .bal-row.balance .amt{color:var(--red);}
  .payment-form{display:flex;gap:8px;margin-top:10px;}
  .payment-form input{flex:1;padding:9px 10px;border-radius:8px;border:1.5px solid var(--line);font-size:14px;}
  .payment-form button{padding:9px 14px;border:none;border-radius:8px;background:var(--teal);color:var(--ink);font-weight:700;font-size:13px;cursor:pointer;}
  .payment-history{margin-top:10px;font-size:12px;color:var(--slate);}
  .payment-history .p-row{display:flex;justify-content:space-between;padding:3px 0;}

  .ledger-total{background:var(--ink);color:var(--paper);border-radius:14px 14px 0 0;padding:16px 18px 12px;margin-top:8px;position:relative;}
  .ledger-total .row{display:flex;justify-content:space-between;font-size:13.5px;opacity:0.75;margin-bottom:5px;}
  .ledger-total .grand{display:flex;justify-content:space-between;font-size:21px;font-weight:600;margin-top:6px;}
  .ledger-total .grand .amt{color:var(--teal);}
  .tear{height:10px;background:linear-gradient(135deg, var(--ink) 50%, transparent 50%) 0 0 / 14px 14px repeat-x, var(--paper);}

  .save-btn{width:100%;padding:15px;border:none;border-radius:12px;background:var(--teal);color:var(--ink);font-size:16px;font-weight:700;font-family:'Space Grotesk',system-ui,sans-serif;cursor:pointer;margin-top:14px;}
  .save-btn:active{transform:scale(0.99);}

  .detail-card{background:white;border-radius:14px;padding:18px;margin-bottom:14px;}
  .detail-card .badge-row{display:flex;gap:6px;margin-bottom:8px;}
  .detail-card .client{font-size:19px;font-weight:700;}
  .detail-card .meta{font-size:12px;color:var(--slate);margin-top:2px;}
  .detail-card .contact{font-size:12px;color:var(--slate);margin-top:6px;}
  .detail-items{margin-top:14px;border-top:1px dashed var(--line);padding-top:10px;}
  .detail-items .row{display:flex;align-items:center;gap:8px;font-size:13.5px;padding:7px 0;}
  .detail-items .row .name-wrap{flex:1;display:flex;align-items:center;gap:8px;}
  .detail-items .row .qty{color:var(--slate);}
  .detail-items .row.item-paid .name-wrap{opacity:0.6;text-decoration:line-through;}
  .detail-items .row input[type="checkbox"]{width:18px;height:18px;accent-color:var(--green);flex-shrink:0;}
  .detail-notes{margin-top:12px;font-size:12.5px;color:var(--slate);border-top:1px dashed var(--line);padding-top:10px;white-space:pre-wrap;}
  .action-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px;}
  .action-row button{flex:1;min-width:100px;padding:12px 8px;border-radius:10px;border:none;font-weight:600;font-size:12.5px;cursor:pointer;}
  .btn-secondary{background:white;color:var(--ink);border:1.5px solid var(--line) !important;}
  .btn-danger{background:rgba(193,83,59,0.12);color:var(--red);}
  .btn-toggle{background:var(--ink);color:var(--paper);}
  .btn-convert{background:var(--teal);color:var(--ink);}

  .exp-card{background:white;border-radius:14px;padding:13px 15px;margin-bottom:9px;display:flex;align-items:center;justify-content:space-between;box-shadow:0 1px 2px rgba(28,37,65,0.06);border-left:4px solid var(--red);}
  .exp-card.type-indirect{border-left-color:var(--slate);}
  .exp-card .left .cat-row{display:flex;align-items:center;gap:6px;}
  .exp-card .left .type-badge{font-size:9.5px;font-weight:700;padding:1px 7px;border-radius:8px;background:rgba(193,83,59,0.12);color:var(--red);text-transform:uppercase;}
  .exp-card .left .type-badge.indirect{background:rgba(58,80,107,0.14);color:var(--slate);}
  .exp-card .left .desc{font-weight:600;font-size:14.5px;margin-top:1px;}
  .exp-card .left .date{font-size:11.5px;color:var(--slate);margin-top:2px;}
  .exp-card .right .amt{font-weight:600;font-size:14.5px;color:var(--red);}

  .settings-group{background:white;border-radius:14px;padding:6px 14px;margin-bottom:16px;}

  .theme-swatch{width:44px;height:44px;border-radius:50%;border:3px solid transparent;cursor:pointer;position:relative;padding:0;}
  .theme-swatch.selected{border-color:var(--ink);}
  .theme-swatch .half{position:absolute;inset:0;border-radius:50%;}

  .mini-type-select{display:flex;gap:4px;background:var(--paper-dim);border-radius:8px;padding:3px;}
  .mini-type-select button{flex:1;padding:6px 4px;border:none;background:none;border-radius:6px;font-size:11.5px;font-weight:600;color:var(--slate);cursor:pointer;}
  .mini-type-select button.active{background:var(--ink);color:var(--paper);}
  .exp-entry-summary{font-size:11px;color:var(--slate);margin-top:2px;}

  .changelog{margin-bottom:14px;border-top:1px solid var(--line);}
  .changelog details{border-bottom:1px solid var(--line);padding:10px 0;}
  .changelog summary{cursor:pointer;list-style:none;display:flex;align-items:center;justify-content:space-between;font-size:13px;font-weight:600;color:var(--ink);}
  .changelog summary::-webkit-details-marker{display:none;}
  .changelog summary .v-num{font-family:'IBM Plex Mono',monospace;color:var(--teal-dark);}
  .changelog summary .chev{transition:transform .15s;color:var(--grey);font-size:11px;}
  .changelog details[open] summary .chev{transform:rotate(90deg);}
  .changelog ul{margin:8px 0 0;padding-left:18px;font-size:12.5px;color:var(--slate);line-height:1.6;}

  .chart-bar-row{margin-bottom:10px;}
  .chart-bar-row .chart-label-row{display:flex;justify-content:space-between;font-size:12.5px;margin-bottom:4px;}
  .chart-bar-row .chart-label-row .name{font-weight:600;color:var(--ink);}
  .chart-bar-row .chart-label-row .amt{font-weight:600;color:var(--slate);}
  .chart-bar-track{height:8px;background:var(--paper-dim);border-radius:5px;overflow:hidden;}
  .chart-bar-fill{height:100%;background:linear-gradient(90deg, var(--teal-dark), var(--teal));border-radius:5px;}
  .chart-empty{font-size:12.5px;color:var(--slate);text-align:center;padding:12px 0;}

  .notebook{position:relative;border-radius:14px;overflow:hidden;box-shadow:0 4px 16px rgba(28,37,65,0.12);min-height:60vh;background:#FFFDF5;}
  .notebook-spine{position:absolute;left:0;top:0;bottom:0;width:34px;background:repeating-linear-gradient(180deg, transparent 0, transparent 18px, rgba(28,37,65,0.08) 18px, rgba(28,37,65,0.08) 20px);border-right:2px solid rgba(193,83,59,0.35);z-index:1;}
  .notebook-paper{
    width:100%;min-height:60vh;border:none;outline:none;resize:none;
    background:#FFFDF5;
    background-image:repeating-linear-gradient(180deg, transparent, transparent 31px, rgba(58,80,107,0.18) 31px, rgba(58,80,107,0.18) 32px);
    background-position:0 14px;
    padding:14px 20px 20px 46px;
    font-family:'Inter',sans-serif;
    font-size:15.5px;
    line-height:32px;
    color:#2B2620;
    box-sizing:border-box;
  }
  .notebook-paper::placeholder{color:rgba(43,38,32,0.4);}

  .ac-wrap{position:relative;}
  .ac-dropdown{position:absolute;top:100%;left:0;right:0;background:white;border:1.5px solid var(--line);border-radius:10px;margin-top:4px;max-height:190px;overflow-y:auto;z-index:40;box-shadow:0 6px 16px rgba(28,37,65,0.15);display:none;}
  .ac-dropdown.show{display:block;}
  .ac-item{padding:11px 13px;font-size:14px;color:var(--ink);cursor:pointer;border-bottom:1px solid var(--line);}
  .ac-item:last-child{border-bottom:none;}
  .ac-item:active{background:var(--paper-dim);}
  .ac-item .ac-sub{font-size:11.5px;color:var(--slate);margin-top:1px;}

  .period-nav{display:flex;align-items:center;gap:8px;margin-bottom:12px;}
  .period-nav select{flex:0 0 auto;padding:10px 12px;border-radius:12px;border:1.5px solid var(--line);background:var(--paper-dim);color:var(--ink);font-size:13px;font-weight:600;}
  .period-arrow{flex:0 0 auto;width:36px;height:36px;border-radius:10px;border:1.5px solid var(--line);background:white;color:var(--teal-dark);font-size:14px;cursor:pointer;display:flex;align-items:center;justify-content:center;}
  .period-arrow:disabled{opacity:0.3;cursor:default;}
  .period-label{flex:1;text-align:center;padding:10px 8px;border-radius:12px;background:var(--paper-dim);border:1.5px solid var(--line);color:var(--ink);font-weight:700;font-size:13.5px;cursor:pointer;position:relative;}
  .period-label input[type="month"]{position:absolute;inset:0;opacity:0;cursor:pointer;}
  .period-custom-row{display:flex;align-items:center;gap:8px;margin:-4px 0 12px;font-size:12.5px;color:var(--slate);}
  .period-custom-row input[type="date"]{flex:1;padding:9px 10px;border-radius:10px;border:1.5px solid var(--line);font-size:13px;background:white;}

  @media print{
    .topbar,.fab,.action-row,.bottom-nav,.chips,.search-row,.summary{display:none !important;}
    body{background:white;}
  }
  .toast{position:fixed;bottom:100px;left:50%;transform:translateX(-50%);background:var(--ink);color:var(--paper);padding:10px 18px;border-radius:20px;font-size:13px;font-weight:500;opacity:0;pointer-events:none;transition:opacity .25s;z-index:50;}
  .toast.show{opacity:1;}