:root {
    --primary-color: #de9406;
    --primary-hover: #c28007;
    --text-color: #1e1e1e;
    --subtle-text: #666;
    --background-color: #FFFDEE;
    --card-background: #FFFFFF;
    --border-color: #f0e9d6;
    --shadow-light: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 8px 12px rgba(0, 0, 0, 0.15);
}

.container-invoice-generator {
  font-family: "Inter", sans-serif;
  background-color: var(--background-color);
  color: var(--text-color);
  margin: 0;
  padding: 2rem 1rem;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100vh;
}
.container-invoice-generator .containerr {
  width: 100%;
  max-width: 900px;
  background-color: var(--card-background);
  border-radius: 12px;
  box-shadow: var(--shadow-light);
  padding: 2rem;
  transition: box-shadow 0.3s ease-in-out;
}
.container-invoice-generator .container:hover {
  box-shadow: var(--shadow-hover);
}
.container-invoice-generator h1,
.container-invoice-generator h2 {
  text-align: center;
  margin-bottom: 2rem;
  font-weight: 700;
}
.container-invoice-generator h2 {
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 1rem;
  margin-top: 2rem;
}
.container-invoice-generator .form-group {
  margin-bottom: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}
.container-invoice-generator .form-field {
  flex: 1 1 200px;
  display: flex;
  flex-direction: column;
}
.container-invoice-generator .form-field textarea {
  min-height: 120px;
  resize: vertical;
  padding: 12px 14px;
  font-size: 14px;
  line-height: 1.6;
  border: 1px solid #d1d5db;
  /* subtle gray border */
  border-radius: 8px;
  background: #fafafa;
  color: #111;
  transition: border 0.2s ease, box-shadow 0.2s ease;
}
.container-invoice-generator .form-field textarea:focus {
  outline: none;
  border-color: #de9406;
  /* blue highlight */
  background: #fff;
  box-shadow: 0 0 0 3px rgba(226, 185, 74, 0.2);
}
.container-invoice-generator label {
  font-weight: 500;
  margin-bottom: 0.5rem;
}
.container-invoice-generator input,
.container-invoice-generator select {
  padding: 0.75rem;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  font-size: 1rem;
  transition: border-color 0.2s ease;
}
.container-invoice-generator input:focus,
.container-invoice-generator select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(74, 144, 226, 0.2);
}
.container-invoice-generator .item-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 2rem;
  text-align: left;
}
.container-invoice-generator .item-table th,
.container-invoice-generator .item-table td {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
}
.container-invoice-generator .item-table th {
  font-weight: 700;
  background-color: var(--background-color);
}
.container-invoice-generator .item-table tr:last-child td {
  border-bottom: none;
}
.container-invoice-generator .item-table input,
.container-invoice-generator .item-table select {
  width: 100%;
  border: 1px solid transparent;
  background-color: transparent;
  padding: 0;
  border-radius: 0;
}
.container-invoice-generator .item-table input:focus {
  background-color: var(--background-color);
  border-color: var(--border-color);
}
.container-invoice-generator .btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 8px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s, background-color 0.2s;
}
.container-invoice-generator .btn:active {
  transform: scale(0.98);
}
.container-invoice-generator .btn-primary {
  background-color: var(--primary-color) !important;
  background-image: none;
  color: white;
}
.container-invoice-generator .btn-primary:hover {
  background-color: var(--primary-hover) !important;
  background-image: none;
}
.container-invoice-generator .btn-secondary {
  background-color: #eee;
  color: var(--text-color);
}
.container-invoice-generator .btn-secondary:hover {
  background-color: #ddd;
}
.container-invoice-generator .btn-container {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-top: 2rem;
}
.container-invoice-generator #addItemBtn {
  margin-top: 1rem;
  width: 100%;
  background-color: var(--primary-color);
  color: white;
}
.container-invoice-generator input:focus,
.container-invoice-generator select:focus,
.container-invoice-generator textarea:focus {
  outline: none;
  border-color: #de9406;
  box-shadow: 0 0 0 4px rgba(222, 148, 6, 0.25);
}
.container-invoice-generator .summary {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 2px solid var(--border-color);
  display: flex;
  flex-direction: column;
  align-items: flex-end;
}
.container-invoice-generator .invoice-terms {
  margin-bottom: 2rem;
}
.container-invoice-generator .invoice-terms h3 {
  margin-bottom: 0.5rem;
}
.container-invoice-generator .invoice-terms p {
  font-size: 0.9rem;
  line-height: 1.5;
  text-align: justify;
  color: var(--subtle-text);
}
.container-invoice-generator .summary-row {
  display: flex;
  justify-content: space-between;
  width: 100%;
  max-width: 300px;
  padding: 0.5rem 0;
  font-size: 1.1rem;
}
.container-invoice-generator .summary-row.total {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
}
.container-invoice-generator .hidden {
  display: none;
}
.container-invoice-generator .invoice-preview {
  display: none;
  padding: 2rem;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background-color: white;
  box-shadow: var(--shadow-light);
}
.container-invoice-generator .invoice-preview.visible {
  display: block;
}
.container-invoice-generator .invoice-header,
.container-invoice-generator .invoice-details,
.container-invoice-generator .invoice-client {
  margin-bottom: 2rem;
}
.container-invoice-generator .invoice-header {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
}
.container-invoice-generator .invoice-header h1 {
  text-align: left;
  margin-bottom: 0.5rem;
}
.container-invoice-generator .invoice-header p {
  margin: 0;
  color: var(--subtle-text);
}
.container-invoice-generator .invoice-details,
.container-invoice-generator .invoice-client {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
}
.container-invoice-generator .invoice-client p {
  margin: 0px;
}
.container-invoice-generator .invoice-details > div,
.container-invoice-generator .invoice-client > div {
  flex: 1 1 40%;
  margin-bottom: 1rem;
}
.container-invoice-generator .invoice-details strong,
.container-invoice-generator .invoice-client strong {
  display: block;
  margin-bottom: 0.25rem;
}
.container-invoice-generator .invoice-preview table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 2rem;
}
.container-invoice-generator .invoice-preview th,
.container-invoice-generator .invoice-preview td {
  padding: 1rem;
  border-bottom: 1px solid var(--border-color);
  text-align: left;
}
.container-invoice-generator .invoice-preview th {
  background-color: var(--background-color);
}
@media (max-width: 768px) {
  .container-invoice-generator {
    padding: 1rem;
  }
  .container-invoice-generator .form-group {
    flex-direction: column;
  }
  .container-invoice-generator .btn-container {
    flex-direction: column;
  }
}
@media print {
  .container-invoice-generator {
    background-color: white;
    padding: 0;
  }
  .container-invoice-generator .container,
  .container-invoice-generator .btn-container,
  .container-invoice-generator #controls {
    display: none;
  }
  .container-invoice-generator .invoice-preview {
    display: block;
    width: 100%;
    box-shadow: none;
    border: none;
  }
}