.inv-layout {
  align-items: start;
}

.inv-items-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.btn-sm {
  padding: 8px 14px;
  font-size: 13px;
}

.inv-items-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
}

.inv-items {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

.inv-items th,
.inv-items td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}

.inv-items th {
  background: var(--bg);
  color: var(--text-dim);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-align: left;
}

.inv-items th:nth-child(2),
.inv-items th:nth-child(3) { width: 72px; }
.inv-items th:last-child { width: 40px; }

.inv-items input {
  width: 100%;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 6px 8px;
  color: var(--text);
  font-size: 13px;
  font-family: inherit;
}

.inv-items input:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--bg-elev);
}

.inv-items input[type="number"] {
  font-variant-numeric: tabular-nums;
}

.inv-row-del {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  width: 28px;
  height: 28px;
  border-radius: 6px;
  cursor: pointer;
  font-family: inherit;
  line-height: 1;
}

.inv-row-del:hover {
  color: var(--danger);
  border-color: rgba(239, 68, 68, 0.4);
}

.inv-totals-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.inv-preview-panel {
  position: sticky;
  top: 80px;
}

.inv-preview {
  background: #fff;
  color: #111;
  border-radius: var(--radius-sm);
  padding: 28px 32px;
  font-size: 13px;
  line-height: 1.45;
  min-height: 420px;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.06);
}

.inv-preview-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
}

.inv-preview-head h3 {
  margin: 0;
  font-size: 28px;
  letter-spacing: 0.06em;
  color: #111;
}

.inv-preview-meta {
  text-align: right;
  color: #555;
  font-size: 12px;
}

.inv-preview-meta strong {
  display: block;
  color: #111;
  font-size: 13px;
}

.inv-preview-parties {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 22px;
}

.inv-preview-parties h4 {
  margin: 0 0 6px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #888;
}

.inv-preview-parties p {
  margin: 0;
  white-space: pre-line;
  color: #333;
}

.inv-preview-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 16px;
}

.inv-preview-table th {
  text-align: left;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #666;
  padding: 8px 6px;
  border-bottom: 2px solid #222;
}

.inv-preview-table td {
  padding: 10px 6px;
  border-bottom: 1px solid #e5e5e5;
  color: #222;
}

.inv-preview-table .num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.inv-preview-totals {
  margin-left: auto;
  width: 220px;
}

.inv-preview-totals div {
  display: flex;
  justify-content: space-between;
  padding: 4px 0;
  color: #444;
}

.inv-preview-totals .grand {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 2px solid #222;
  font-weight: 700;
  font-size: 15px;
  color: #111;
}

.inv-preview-notes {
  margin-top: 20px;
  padding-top: 14px;
  border-top: 1px solid #e5e5e5;
  color: #555;
  font-size: 12px;
  white-space: pre-line;
}

@media (max-width: 860px) {
  .inv-preview-panel { position: static; }
  .inv-totals-form { grid-template-columns: 1fr; }
}