* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(180deg, #f0f5ff 0%, #f8fafc 100%);
  color: #0f172a;
}

.layout {
  max-width: 1000px;
  margin: 24px auto;
  padding: 20px;
}

.header h1 {
  margin: 0 0 8px;
}

.header p {
  margin: 8px 0;
  line-height: 1.45;
}

.info-list {
  margin: 6px 0 10px 20px;
  padding: 0;
}

.info-list li {
  margin: 4px 0;
}

.meta-info {
  font-size: 0.95rem;
  color: #334155;
}

.form-grid {
  display: grid;
  gap: 18px;
  margin-top: 20px;
}

.section-card {
  background: #ffffff;
  border: 1px solid #dbeafe;
  border-radius: 12px;
  padding: 14px;
}

.section-card h2 {
  margin: 0 0 12px;
  font-size: 1.1rem;
}

.section-card-collapsible {
  padding: 0;
  overflow: hidden;
}

.section-summary {
  cursor: pointer;
  list-style: none;
  padding: 14px;
  position: relative;
}

.section-summary::-webkit-details-marker {
  display: none;
}

.section-summary h2 {
  margin: 0;
  padding-right: 24px;
}

.section-summary::after {
  content: "+";
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-weight: 700;
  color: #1e3a8a;
}

.section-card-collapsible[open] .section-summary::after {
  content: "-";
}

.section-card-collapsible[open] .section-summary {
  border-bottom: 1px solid #dbeafe;
}

.section-content {
  padding: 0 14px 14px;
}

.section-card:not(.section-card-collapsible) .section-content {
  padding: 0;
}

.fields-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin-bottom: 12px;
}

.fields-row:last-child {
  margin-bottom: 0;
}

.fields-row.cols-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.fields-row.cols-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.fields-row-address {
  grid-template-columns: minmax(0, 2.2fr) minmax(120px, 0.9fr) minmax(120px, 0.9fr);
}

.fields-row-contact {
  grid-template-columns: minmax(0, 1.6fr) minmax(150px, 1fr) minmax(0, 1.8fr);
}

.field {
  display: grid;
  gap: 6px;
}

.field label {
  font-size: 0.95rem;
  font-weight: 600;
}

.required-mark {
  color: #b91c1c;
}

.field small {
  color: #475569;
  font-size: 0.82rem;
}

.field input,
.field textarea {
  width: 100%;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  padding: 10px;
  font: inherit;
  background: #ffffff;
}

.field textarea {
  min-height: 130px;
  resize: vertical;
}

.field.required input {
  border-color: #ef4444;
}

.field.optional input {
  border-color: #eab308;
}

.field.editable textarea {
  border-color: #22c55e;
}

.field.date input {
  border-color: #38bdf8;
  background: #e0f2fe;
}

.actions {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.actions button {
  border: none;
  border-radius: 10px;
  padding: 11px 16px;
  cursor: pointer;
  font-weight: 700;
}

#download-btn {
  background: #0f766e;
  color: white;
}

#preview-btn {
  background: #475569;
  color: white;
}

#send-btn {
  background: #1d4ed8;
  color: white;
}

.actions button:disabled {
  opacity: 0.6;
  cursor: default;
}

.status {
  margin-top: 16px;
  min-height: 1.4em;
  font-weight: 600;
}

.status.error {
  color: #b91c1c;
}

.status.ok {
  color: #166534;
}

@media (max-width: 720px) {
  .fields-row.cols-2,
  .fields-row.cols-3,
  .fields-row-address,
  .fields-row-contact {
    grid-template-columns: minmax(0, 1fr);
  }

  .layout {
    margin: 0;
    padding: 14px;
  }

  .section-card {
    padding: 12px;
  }
}