.ownzero-invgen{
    --black:#0a0a0a;
    --white:#ffffff;
    --panel:#f1f0ec;
    --line:#0a0a0a;
    --mid:#6b6b68;
    --thin:1px;
    --thick:3px;
  }
  .ownzero-invgen *{box-sizing:border-box;margin:0;padding:0;}
  .ownzero-invgen{
    font-family:'Space Grotesk',sans-serif;
    background:var(--panel);
    color:var(--black);
    
  }
  .ownzero-invgen ::selection{background:var(--black);color:var(--white);}

  /* ---------- APP SHELL ---------- */
  .ownzero-invgen .oiv-app{
    display:grid;
    grid-template-columns:400px 1fr;
    
  }
  @media (max-width:900px){
    .ownzero-invgen .oiv-app{grid-template-columns:1fr;}
  }

  /* ---------- EDITOR PANEL ---------- */
  .ownzero-invgen .oiv-editor{
    background:var(--panel);
    border-right:var(--thick) solid var(--black);
    padding:28px 26px 100px;
    overflow-y:auto;
  }
  .ownzero-invgen .oiv-brand{
    display:flex;
    align-items:baseline;
    justify-content:space-between;
    margin-bottom:26px;
    padding-bottom:16px;
    border-bottom:var(--thick) solid var(--black);
  }
  .ownzero-invgen .oiv-brand h1{
    font-family:'Archivo Black',sans-serif;
    font-size:20px;
    letter-spacing:-0.02em;
  }
  .ownzero-invgen .oiv-brand .oiv-tag{
    font-family:'IBM Plex Mono',monospace;
    font-size:10px;
    color:var(--mid);
    text-transform:uppercase;
    letter-spacing:0.08em;
  }
  .ownzero-invgen .oiv-lang-toggle{
    display:flex;
    border:var(--thick) solid var(--black);
    margin-bottom:24px;
  }
  .ownzero-invgen .oiv-lang-toggle button{
    flex:1;
    padding:9px 0;
    font-family:'IBM Plex Mono',monospace;
    font-size:11px;
    font-weight:600;
    letter-spacing:0.08em;
    background:var(--white);
    color:var(--black);
    border:none;
    cursor:pointer;
    text-transform:uppercase;
  }
  .ownzero-invgen .oiv-lang-toggle button + button{border-left:var(--thick) solid var(--black);}
  .ownzero-invgen .oiv-lang-toggle button.oiv-active{background:var(--black);color:var(--white);}

  .ownzero-invgen .oiv-section{margin-bottom:26px;}
  .ownzero-invgen .oiv-section-title{
    font-family:'IBM Plex Mono',monospace;
    font-size:11px;
    font-weight:600;
    text-transform:uppercase;
    letter-spacing:0.1em;
    margin-bottom:10px;
    display:flex;
    align-items:center;
    gap:8px;
  }
  .ownzero-invgen .oiv-section-title::after{
    content:'';
    flex:1;
    height:var(--thin);
    background:var(--black);
    opacity:0.35;
  }
  .ownzero-invgen .oiv-field{margin-bottom:10px;}
  .ownzero-invgen .oiv-field label{
    display:block;
    font-family:'IBM Plex Mono',monospace;
    font-size:9px;
    text-transform:uppercase;
    letter-spacing:0.08em;
    color:var(--mid);
    margin-bottom:4px;
  }
  .ownzero-invgen .oiv-field input, .ownzero-invgen .oiv-field textarea{
    width:100%;
    border:var(--thin) solid var(--black);
    background:var(--white);
    padding:9px 10px;
    font-family:'Space Grotesk',sans-serif;
    font-size:13.5px;
    color:var(--black);
    outline:none;
  }
  .ownzero-invgen .oiv-field input:focus, .ownzero-invgen .oiv-field textarea:focus{
    border-width:2px;
    padding:8px 9px;
  }
  .ownzero-invgen .oiv-field textarea{resize:vertical;min-height:56px;font-family:'Space Grotesk',sans-serif;}
  .ownzero-invgen .oiv-row2{display:grid;grid-template-columns:1fr 1fr;gap:10px;}

  .ownzero-invgen .oiv-logo-upload{
    width:56px;height:56px;
    border:var(--thick) solid var(--black);
    display:flex;align-items:center;justify-content:center;
    cursor:pointer;
    background:var(--white);
    font-family:'IBM Plex Mono',monospace;
    font-size:9px;
    text-align:center;
    color:var(--mid);
    overflow:hidden;
    flex-shrink:0;
  }
  .ownzero-invgen .oiv-logo-upload img{width:100%;height:100%;object-fit:cover;}
  .ownzero-invgen .oiv-logo-row{display:flex;gap:12px;align-items:flex-start;margin-bottom:10px;}
  .ownzero-invgen .oiv-logo-row .oiv-field{flex:1;margin-bottom:0;}

  .ownzero-invgen .oiv-items-editor .oiv-item-row{
    display:grid;
    grid-template-columns:1fr 46px 64px 22px;
    gap:6px;
    margin-bottom:6px;
    align-items:center;
  }
  .ownzero-invgen .oiv-items-editor input{
    border:var(--thin) solid var(--black);
    background:var(--white);
    padding:7px 8px;
    font-size:12.5px;
    font-family:'Space Grotesk',sans-serif;
    width:100%;
    outline:none;
  }
  .ownzero-invgen .oiv-items-editor .oiv-qty, .ownzero-invgen .oiv-items-editor .oiv-rate{font-family:'IBM Plex Mono',monospace;text-align:right;}
  .ownzero-invgen .oiv-rm-row{
    background:none;border:none;cursor:pointer;
    font-size:16px;color:var(--mid);
    line-height:1;
  }
  .ownzero-invgen .oiv-rm-row:hover{color:var(--black);}
  .ownzero-invgen .oiv-add-row{
    width:100%;
    margin-top:6px;
    padding:9px;
    background:var(--white);
    border:var(--thin) dashed var(--black);
    font-family:'IBM Plex Mono',monospace;
    font-size:11px;
    letter-spacing:0.05em;
    cursor:pointer;
    text-transform:uppercase;
  }
  .ownzero-invgen .oiv-add-row:hover{background:var(--black);color:var(--white);border-style:solid;}

  .ownzero-invgen .oiv-actions{
    position:sticky;
    bottom:0;
    background:var(--panel);
    padding-top:16px;
    border-top:var(--thick) solid var(--black);
    display:flex;
    gap:10px;
    margin-top:10px;
  }
  .ownzero-invgen .oiv-btn{
    flex:1;
    padding:14px 0;
    font-family:'IBM Plex Mono',monospace;
    font-size:12px;
    font-weight:600;
    letter-spacing:0.08em;
    text-transform:uppercase;
    cursor:pointer;
    border:var(--thick) solid var(--black);
  }
  .ownzero-invgen .oiv-btn-primary{background:var(--black);color:var(--white);}
  .ownzero-invgen .oiv-btn-primary:hover{background:var(--white);color:var(--black);}
  .ownzero-invgen .oiv-btn-ghost{background:var(--white);color:var(--black);}
  .ownzero-invgen .oiv-btn-ghost:hover{background:var(--black);color:var(--white);}

  /* ---------- PREVIEW ---------- */
  .ownzero-invgen .oiv-preview-wrap{
    padding:44px;
    display:flex;
    justify-content:center;
    align-items:flex-start;
  }
  .ownzero-invgen .oiv-sheet{
    background:var(--white);
    width:100%;
    max-width:820px;
    padding:56px 52px;
    box-shadow:14px 14px 0 var(--black);
    border:var(--thick) solid var(--black);
  }
  .ownzero-invgen .oiv-sheet[dir="rtl"]{text-align:right;}

  .ownzero-invgen .oiv-head{
    display:flex;
    justify-content:space-between;
    align-items:flex-start;
    padding-bottom:26px;
    border-bottom:6px solid var(--black);
    margin-bottom:30px;
  }
  .ownzero-invgen .oiv-head-left{display:flex;gap:16px;align-items:flex-start;}
  .ownzero-invgen .oiv-head-logo{
    width:64px;height:64px;
    border:var(--thick) solid var(--black);
    display:flex;align-items:center;justify-content:center;
    font-family:'Archivo Black',sans-serif;
    font-size:22px;
    flex-shrink:0;
    overflow:hidden;
  }
  .ownzero-invgen .oiv-head-logo img{width:100%;height:100%;object-fit:cover;}
  .ownzero-invgen .oiv-biz-name{
    font-family:'Archivo Black',sans-serif;
    font-size:22px;
    letter-spacing:-0.01em;
    margin-bottom:6px;
  }
  .ownzero-invgen .oiv-biz-meta{
    font-family:'IBM Plex Mono',monospace;
    font-size:11px;
    color:var(--mid);
    line-height:1.6;
    white-space:pre-line;
  }
  .ownzero-invgen .oiv-head-right{text-align:right;}
  .ownzero-invgen .oiv-sheet[dir="rtl"] .oiv-head-right{text-align:left;}
  .ownzero-invgen .oiv-inv-label{
    font-family:'Archivo Black',sans-serif;
    font-size:34px;
    letter-spacing:-0.02em;
    line-height:1;
  }
  .ownzero-invgen .oiv-inv-num{
    font-family:'IBM Plex Mono',monospace;
    font-size:13px;
    font-weight:600;
    margin-top:8px;
  }

  .ownzero-invgen .oiv-meta-grid{
    display:grid;
    grid-template-columns:1fr 1fr 1fr;
    gap:20px;
    margin-bottom:30px;
  }
  .ownzero-invgen .oiv-meta-block .oiv-k{
    font-family:'IBM Plex Mono',monospace;
    font-size:9px;
    text-transform:uppercase;
    letter-spacing:0.1em;
    color:var(--mid);
    margin-bottom:5px;
  }
  .ownzero-invgen .oiv-meta-block .oiv-v{
    font-size:14px;
    font-weight:600;
    white-space:pre-line;
    line-height:1.5;
  }
  .ownzero-invgen .oiv-meta-block .oiv-v.oiv-mono{font-family:'IBM Plex Mono',monospace;font-weight:500;}

  .ownzero-invgen table{width:100%;border-collapse:collapse;margin-bottom:26px;}
  .ownzero-invgen thead th{
    font-family:'IBM Plex Mono',monospace;
    font-size:10px;
    text-transform:uppercase;
    letter-spacing:0.08em;
    text-align:left;
    padding:0 0 10px;
    border-bottom:var(--thick) solid var(--black);
  }
  .ownzero-invgen thead th.oiv-num{text-align:right;}
  .ownzero-invgen .oiv-sheet[dir="rtl"] thead th{text-align:right;}
  .ownzero-invgen .oiv-sheet[dir="rtl"] thead th.oiv-num{text-align:left;}
  .ownzero-invgen tbody td{
    padding:12px 0;
    border-bottom:var(--thin) solid #cfcfcb;
    font-size:13.5px;
    vertical-align:top;
  }
  .ownzero-invgen tbody td.oiv-num{text-align:right;font-family:'IBM Plex Mono',monospace;}
  .ownzero-invgen .oiv-sheet[dir="rtl"] tbody td.oiv-num{text-align:left;}
  .ownzero-invgen tbody tr:last-child td{border-bottom:var(--thick) solid var(--black);}

  .ownzero-invgen .oiv-totals{
    margin-left:auto;
    width:280px;
  }
  .ownzero-invgen .oiv-sheet[dir="rtl"] .oiv-totals{margin-left:0;margin-right:auto;}
  .ownzero-invgen .oiv-t-row{
    display:flex;
    justify-content:space-between;
    padding:7px 0;
    font-size:13px;
  }
  .ownzero-invgen .oiv-t-row .oiv-l{color:var(--mid);}
  .ownzero-invgen .oiv-t-row .oiv-v{font-family:'IBM Plex Mono',monospace;}
  .ownzero-invgen .oiv-t-final{
    background:var(--black);
    color:var(--white);
    padding:16px 18px;
    display:flex;
    justify-content:space-between;
    align-items:center;
    margin-top:8px;
  }
  .ownzero-invgen .oiv-t-final .oiv-l{
    font-family:'IBM Plex Mono',monospace;
    font-size:11px;
    text-transform:uppercase;
    letter-spacing:0.1em;
  }
  .ownzero-invgen .oiv-t-final .oiv-v{
    font-family:'Archivo Black',sans-serif;
    font-size:22px;
  }

  .ownzero-invgen .oiv-notes{
    margin-top:34px;
    padding-top:20px;
    border-top:var(--thin) solid var(--black);
  }
  .ownzero-invgen .oiv-notes .oiv-k{
    font-family:'IBM Plex Mono',monospace;
    font-size:9px;
    text-transform:uppercase;
    letter-spacing:0.1em;
    color:var(--mid);
    margin-bottom:6px;
  }
  .ownzero-invgen .oiv-notes .oiv-v{font-size:12.5px;line-height:1.6;white-space:pre-line;}

  .ownzero-invgen .oiv-foot{
    margin-top:40px;
    text-align:center;
    font-family:'IBM Plex Mono',monospace;
    font-size:10px;
    letter-spacing:0.08em;
    color:var(--mid);
    text-transform:uppercase;
  }

  .ownzero-invgen .oiv-verify{
    display:flex;
    align-items:center;
    gap:16px;
    margin-top:26px;
    padding-top:20px;
    border-top:var(--thin) solid var(--black);
  }
  .ownzero-invgen .oiv-sheet[dir="rtl"] .oiv-verify{flex-direction:row-reverse;}
  .ownzero-invgen .oiv-qr-box{
    width:88px;height:88px;
    border:var(--thick) solid var(--black);
    padding:5px;
    display:flex;align-items:center;justify-content:center;
    background:var(--white);
    flex-shrink:0;
  }
  .ownzero-invgen .oiv-qr-box img, .ownzero-invgen .oiv-qr-box canvas{display:block;width:100%;height:100%;}
  .ownzero-invgen .oiv-verify-text .oiv-k{
    font-family:'IBM Plex Mono',monospace;
    font-size:9px;
    text-transform:uppercase;
    letter-spacing:0.1em;
    color:var(--mid);
    margin-bottom:5px;
  }
  .ownzero-invgen .oiv-verify-text .oiv-v{
    font-family:'IBM Plex Mono',monospace;
    font-size:11px;
    line-height:1.7;
    white-space:pre-line;
  }

  /* ---------- PRINT ---------- */
  @media print{
    .ownzero-invgen{background:var(--white);}
    .ownzero-invgen .oiv-editor{display:none;}
    .ownzero-invgen .oiv-app{display:block;}
    .ownzero-invgen .oiv-preview-wrap{padding:0;display:block;}
    .ownzero-invgen .oiv-sheet{box-shadow:none;border:none;max-width:100%;padding:0;}
    @page{margin:14mm;}
  }