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

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.5;
  background: #f5f7fa;
  color: #1d1d1f;
  padding: 20px;
  max-width: 800px;
  margin: 0 auto;
}

header {
  background: #ffffff;
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

h1 {
  font-size: 1.8rem;
  color: #007bff;
}

.install-section {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 20px 0;
}

.install-btn {
  background: #007bff;
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s;
}

.install-btn:disabled {
  background: #a0c4ff;
  cursor: default;
}

.install-status {
  font-size: 0.9rem;
  color: #555;
}

section {
  background: white;
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}

h2 {
  font-size: 1.3rem;
  margin-bottom: 15px;
  color: #333;
  display: flex;
  align-items: center;
  gap: 8px;
}

.feature-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid #eee;
}

.feature-row:last-child {
  border-bottom: none;
}

.feature-label {
  font-weight: 500;
}

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

.check-btn {
  background: #e9ecef;
  border: none;
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.2s;
}

.check-btn:hover {
  background: #dee2e6;
}

.status {
  font-size: 0.85rem;
  min-width: 130px;
  text-align: right;
  color: #888;
}

.status.success {
  color: #28a745;
}

.status.error {
  color: #dc3545;
}