:root{
  --bg:#0f1419;--panel:#1a2029;--panel-2:#222a35;--line:#2e3947;
  --text:#e6ebf1;--muted:#8b97a7;--accent:#3b82f6;--accent-2:#2563eb;
  --green:#22c55e;--red:#ef4444;--amber:#f59e0b;--radius:10px;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%;background:var(--bg);color:var(--text);
  font:14px/1.45 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}
h1,h2,h3{margin:0}
.muted{color:var(--muted)}
hr{border:none;border-top:1px solid var(--line);margin:14px 0}

.topbar{display:flex;align-items:center;justify-content:space-between;
  padding:12px 20px;background:var(--panel);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:12px}
.logo{display:grid;place-items:center;width:38px;height:38px;border-radius:9px;
  background:var(--green);color:#06210f;font-size:20px;font-weight:700}
.topbar h1{font-size:17px}
.sub{margin:0;color:var(--muted);font-size:12px}
.counts{color:var(--muted);font-size:13px}

.layout{display:grid;grid-template-columns:340px 1fr 280px;gap:14px;
  padding:14px;height:calc(100vh - 63px)}
.panel{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:14px;display:flex;flex-direction:column;overflow:hidden}
.panel-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}
.panel-head h2{font-size:14px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}

/* buttons */
.btn{appearance:none;border:1px solid var(--line);background:var(--panel-2);color:var(--text);
  padding:8px 12px;border-radius:8px;cursor:pointer;font-size:13px;font-weight:600}
.btn:hover{border-color:var(--accent)}
.btn.primary{background:var(--accent-2);border-color:var(--accent-2)}
.btn.primary:hover{background:var(--accent)}
.btn.small{padding:6px 10px;font-size:12px}
.btn.ghost{background:transparent}
.btn.approve{background:var(--green);border-color:var(--green);color:#06210f}
.btn.reject{background:var(--red);border-color:var(--red);color:#2a0606}
.stamp-actions .btn,.status-actions .btn,.export-actions .btn{width:100%;margin-bottom:8px}
.status-actions{display:flex;gap:8px}
.status-actions .btn{margin-bottom:0}

/* import / dropzone */
.import-wrap label{margin:0}
.dropzone{border:2px dashed var(--line);border-radius:10px;padding:14px;text-align:center;
  color:var(--muted);font-size:13px;margin-bottom:12px}
.dropzone.drag{border-color:var(--accent);color:var(--text);background:var(--panel-2)}

/* filters */
.filters{display:flex;gap:10px;margin-bottom:10px}
.filters label{flex:1;font-size:11px;color:var(--muted);display:flex;flex-direction:column;gap:4px}
.filters select,.bulk-vendor input,.field input,.field textarea,.field select{
  background:var(--panel-2);border:1px solid var(--line);color:var(--text);
  border-radius:7px;padding:7px 8px;font:inherit;width:100%}
.bulk-bar{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.chk{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--muted)}
.bulk-vendor{display:flex;gap:6px;margin-bottom:8px}
.bulk-vendor input{flex:1}
.bulk-status{display:flex;gap:6px;margin-bottom:8px}
.bulk-status .btn{flex:1}
.hint{font-size:11px;margin:0 0 12px}

/* invoice list */
.invoice-list{list-style:none;margin:0;padding:0;overflow-y:auto;flex:1}
.inv{display:flex;align-items:center;gap:8px;padding:8px;border:1px solid var(--line);
  border-radius:8px;margin-bottom:8px;background:var(--panel-2);cursor:pointer}
.inv.active{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent) inset}
.inv .meta{flex:1;min-width:0}
.inv .name{font-size:13px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.inv .vend{width:100%;margin-top:4px;background:#161c24;border:1px solid var(--line);
  color:var(--text);border-radius:6px;padding:3px 6px;font-size:12px}
.badge{font-size:10px;font-weight:700;padding:2px 6px;border-radius:20px;text-transform:uppercase}
.badge.pending{background:#3a3320;color:var(--amber)}
.badge.approved{background:#14331f;color:var(--green)}
.badge.rejected{background:#3a1818;color:var(--red)}
.badge.stamped{background:#16263f;color:#7db1ff}
.inv .badges{display:flex;flex-direction:column;gap:4px;align-items:flex-end}

/* preview */
.preview-area{flex:1;overflow:auto;display:grid;place-items:center;background:#0b0f14;
  border-radius:8px;position:relative}
.empty-hint{color:var(--muted)}
.page-wrap{position:relative;line-height:0;box-shadow:0 4px 24px rgba(0,0,0,.5)}
.page-wrap canvas{display:block}
.stamp-box{position:absolute;top:0;left:0;cursor:move;white-space:pre;
  font-family:Helvetica,Arial,sans-serif;font-weight:700;user-select:none;
  padding:2px 3px;border:1px dashed transparent}
.stamp-box:hover{border-color:rgba(255,255,255,.4)}
.stamp-box.placed{border-color:rgba(255,255,255,.25)}

/* fields */
.field{display:flex;flex-direction:column;gap:5px;font-size:12px;color:var(--muted);margin-bottom:12px}
.field textarea{resize:vertical;font-family:ui-monospace,Menlo,Consolas,monospace}
.field-row{display:flex;gap:10px}
.field-row .field{flex:1}
input[type=color]{height:36px;padding:2px}

.export-actions h3{font-size:13px;margin-bottom:8px}

/* toast */
.toast{position:fixed;bottom:18px;left:50%;transform:translateX(-50%) translateY(40px);
  background:#0b0f14;border:1px solid var(--line);color:var(--text);padding:10px 16px;
  border-radius:8px;opacity:0;transition:.25s;pointer-events:none;z-index:50}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

@media (max-width:1100px){.layout{grid-template-columns:1fr;height:auto}}