:root {
  --primary-color: #007bff;
  --primary-hover: #0056b3;
  --secondary-color: #6c757d;
  --success-color: #28a745;
  --danger-color: #dc3545;
  --bg-color: #f8f9fa;
  --text-color: #333;
  --border-color: #dee2e6;
}

* {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-color);
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

header {
  background-color: #fff;
  padding: 15px 20px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  display: flex;
  align-items: center;
  margin-bottom: 20px;
}

header h1 {
  margin: 0;
  font-size: 1.25rem;
  flex-grow: 1;
  text-align: center;
}

.btn-back {
  background: none;
  border: none;
  color: var(--primary-color);
  font-size: 1rem;
  cursor: pointer;
  padding: 5px 10px;
  position: absolute;
}

main {
  padding: 0 15px;
  max-width: 600px;
  margin: 0 auto;
}

.screen {
  display: none;
}

.screen.active {
  display: block;
}

.card {
  background: #fff;
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.card h2, .card h3 {
  margin-top: 0;
  color: #495057;
  border-bottom: 2px solid var(--primary-color);
  padding-bottom: 5px;
  margin-bottom: 15px;
}

.form-group {
  margin-bottom: 15px;
}

label {
  display: block;
  font-weight: bold;
  margin-bottom: 5px;
  color: #495057;
}

input[type="text"],
input[type="number"],
input[type="date"],
select,
textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 16px; /* Prevents iOS zoom */
}

.flex-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.flex-row input {
  flex: 1;
}

.flex-row select {
  flex: 1;
}

.date-group {
  display: flex;
  align-items: center;
  gap: 5px;
}

.date-group input {
  width: 80px;
  text-align: center;
}

.date-group span {
  white-space: nowrap;
}

.checkbox-group, .radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.checkbox-item, .radio-item {
  display: flex;
  align-items: center;
}

.checkbox-item input, .radio-item input {
  margin-right: 5px;
  width: 18px;
  height: 18px;
}

.btn {
  display: inline-block;
  font-weight: 400;
  text-align: center;
  white-space: nowrap;
  vertical-align: middle;
  user-select: none;
  border: 1px solid transparent;
  padding: 0.375rem 0.75rem;
  font-size: 1rem;
  line-height: 1.5;
  border-radius: 0.25rem;
  cursor: pointer;
}

.btn-block {
  display: block;
  width: 100%;
  margin-bottom: 10px;
}

.btn-lg {
  padding: 0.5rem 1rem;
  font-size: 1.25rem;
  border-radius: 0.3rem;
}

.btn-primary {
  color: #fff;
  background-color: var(--primary-color);
  border-color: var(--primary-color);
}

.btn-primary:hover { background-color: var(--primary-hover); }

.btn-secondary {
  color: #fff;
  background-color: var(--secondary-color);
  border-color: var(--secondary-color);
}

.btn-success {
  color: #fff;
  background-color: var(--success-color);
  border-color: var(--success-color);
}

.btn-danger {
  color: #fff;
  background-color: var(--danger-color);
  border-color: var(--danger-color);
}

.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-5 { margin-bottom: 3rem; }

.hidden { display: none !important; }

/* Signature Pad */
.signature-container {
  border: 2px dashed var(--border-color);
  border-radius: 4px;
  background-color: #fff;
  touch-action: none; /* Prevent scrolling when signing */
}

#signature-pad {
  width: 100%;
  aspect-ratio: 5 / 1;
  height: auto;
  border: 1px solid #ccc;
  border-radius: 4px;
  cursor: crosshair;
  background-color: #fcfcfc;
  display: block;
}

.text-danger { color: var(--danger-color); }

/* PDF Preview */
.pdf-preview-container {
  width: 100%;
  height: 60vh;
  border: 1px solid var(--border-color);
}

#pdf-preview-frame {
  width: 100%;
  height: 100%;
  border: none;
}

.child-card {
  border: 1px solid var(--border-color);
  padding: 10px;
  border-radius: 4px;
  margin-bottom: 10px;
  background-color: #fcfcfc;
}

.child-card h3 {
  margin: 0 0 5px 0;
  border: none;
  font-size: 1.1rem;
}

.child-card p {
  margin: 0 0 10px 0;
  font-size: 0.9rem;
  color: var(--secondary-color);
}

/* Vaccine table (様式1号 予防接種) */
.vaccine-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.88rem;
}

.vaccine-row {
  display: flex;
  align-items: center;
  border-bottom: 1px solid #eee;
  padding: 6px 0;
  gap: 4px;
}

.vaccine-row.vaccine-header {
  font-weight: bold;
  background: #f5f5f5;
  border-radius: 4px;
  padding: 6px 4px;
}

.vaccine-name {
  flex: 3;
  font-size: 0.85rem;
}

.vaccine-checks {
  flex: 1;
  text-align: center;
  color: #555;
}

.vaccine-checks input[type="checkbox"] {
  width: 20px;
  height: 20px;
  cursor: pointer;
}

/* Household member rows (様式1号 世帯構成) */
.household-header {
  display: flex;
  gap: 8px;
  font-weight: bold;
  font-size: 0.85rem;
  color: #555;
  padding: 4px 0;
  border-bottom: 1px solid #ddd;
  margin-bottom: 4px;
}

.household-member {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
  border-bottom: 1px solid #f0f0f0;
}

.household-member .member-num {
  width: 20px;
  text-align: center;
  font-weight: bold;
  color: #888;
  font-size: 0.85rem;
}

.mt-2 { margin-top: 8px; }