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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f5f5f5;
  max-width: 100%;
}

/* App container */
.app {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

/* Header */
header {
  margin-bottom: 40px;
  text-align: center;
  padding: 20px 0;
  border-bottom: 1px solid #ddd;
}

header h1 {
  color: #2c3e50;
  font-size: 2.5rem;
  margin-bottom: 10px;
}

header p {
  color: #7f8c8d;
  font-size: 1.2rem;
}

/* Main content */
main {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

@media (min-width: 768px) {
  main {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Group list */
.group-list {
  background-color: white;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  padding: 20px;
}

.group-list h2 {
  color: #2c3e50;
  margin-bottom: 20px;
  font-size: 1.8rem;
}

.group-list ul {
  list-style-type: none;
}

.group-list li {
  border-bottom: 1px solid #eee;
  padding: 15px 0;
}

.group-list li:last-child {
  border-bottom: none;
}

.group-list h3 {
  font-size: 1.3rem;
  color: #34495e;
  margin-bottom: 5px;
}

.group-list .actions {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

.group-list button {
  padding: 8px 15px;
  background-color: #3498db;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.2s;
}

.group-list button.delete {
  background-color: #e74c3c;
}

.group-list button:hover {
  background-color: #2980b9;
}

.group-list button.delete:hover {
  background-color: #c0392b;
}

/* Create group form */
.group-form {
  background-color: white;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  padding: 20px;
}

.group-form h2 {
  color: #2c3e50;
  margin-bottom: 20px;
  font-size: 1.8rem;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 5px;
  font-weight: 600;
  color: #34495e;
}

.form-group input {
  width: 100%;
  padding: 10px;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 1rem;
}

.person-input {
  display: flex;
  gap: 10px;
}

.person-input input {
  flex: 1;
}

.person-input button,
.form-actions button {
  padding: 10px 15px;
  background-color: #3498db;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.2s;
}

.form-actions button {
  padding: 12px 20px;
  font-size: 1.1rem;
  background-color: #2ecc71;
}

.person-input button:hover,
.form-actions button:hover {
  background-color: #2980b9;
}

.form-actions button:hover {
  background-color: #27ae60;
}

.person-input button:disabled,
.form-actions button:disabled {
  background-color: #bdc3c7;
  cursor: not-allowed;
}

.people-list {
  margin-bottom: 20px;
}

.people-list h3 {
  font-size: 1.2rem;
  color: #34495e;
  margin-bottom: 10px;
}

.people-list ul {
  list-style-type: none;
  border: 1px solid #eee;
  border-radius: 4px;
  background-color: #f9f9f9;
}

.people-list li {
  padding: 10px 15px;
  border-bottom: 1px solid #eee;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.people-list li:last-child {
  border-bottom: none;
}

.people-list button {
  padding: 5px 10px;
  background-color: #e74c3c;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.2s;
}

.people-list button:hover {
  background-color: #c0392b;
}

.form-actions {
  margin-top: 30px;
}

/* Offline indicator */
.offline-indicator {
  background-color: #ffe082;
  color: #8d6e63;
  padding: 0.5rem;
  text-align: center;
  font-size: 0.875rem;
  margin-top: 0.5rem;
  border-radius: 4px;
}