* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: Arial, Helvetica, sans-serif;
  background: #eef1f7;
  min-height: 100vh;
  padding: 20px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  overflow: hidden;
}

.header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
  padding: 24px;
  text-align: center;
}

.tabs {
  display: flex;
  gap: 2px;
  background: #f3f4f6;
}

.tab {
  flex: 1;
  padding: 12px;
  cursor: pointer;
  border: 0;
  background: transparent;
  font-weight: 600;
}

.tab.active {
  background: #fff;
  border-bottom: 2px solid #667eea;
  color: #667eea;
}

.content {
  padding: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.form-group label {
  display: block;
  margin: 8px 0 6px;
  font-weight: 600;
}

.form-group label.required::after {
  content: ' *';
  color: #e11d48;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
}

.btn {
  padding: 10px 16px;
  border-radius: 8px;
  border: 0;
  cursor: pointer;
  font-weight: 600;
}

.btn-primary { background: #667eea; color: #fff; }
.btn-secondary { background: #6b7280; color: #fff; }
.btn-danger { background: #ef4444; color: #fff; }
.btn-info { background: #0ea5e9; color: #fff; }
.btn-success { background: #16a34a; color: #fff; }

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 16px;
}

th, td {
  padding: 10px;
  border-bottom: 1px solid #e5e7eb;
  text-align: left;
}

thead { background: #f3f4f6; }

.modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  align-items: center;
  justify-content: center;
}

.modal.active { display: flex; }

.modal-content {
  background: #fff;
  padding: 20px;
  border-radius: 12px;
  width: 95%;
  max-width: 700px;
}

.export-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 10px 0;
}

.qrcode-container {
  text-align: center;
  padding: 16px;
  background: #f9fafb;
  border-radius: 8px;
}