body {
  font-family: system-ui, sans-serif;
  margin: 0;
  padding: 0;
}

nav {
  background: #f5f5f5;
  padding: 0.75rem 1rem;
  display: flex;
  gap: 1rem;
  align-items: center;
  border-bottom: 1px solid #ddd;
}

nav a {
  text-decoration: none;
  color: #333;
}

main {
  padding: 1rem;
  max-width: 1200px;
  margin: 0 auto;
}

.flash {
  padding: 0.75rem 1rem;
  margin: 0.5rem 1rem;
  border-radius: 4px;
}

.flash.success {
  background: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.flash.error {
  background: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  text-align: left;
  padding: 0.5rem;
  border-bottom: 1px solid #ddd;
}

button {
  cursor: pointer;
}

.btn-primary {
  background: #007bff;
  color: #fff;
  border: 1px solid #0069d9;
  border-radius: 4px;
  padding: 0.25rem 0.5rem;
}

.btn-danger {
  background: #dc3545;
  color: #fff;
  border: 1px solid #bd2130;
  border-radius: 4px;
  padding: 0.25rem 0.5rem;
}

.role {
  display: inline-block;
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  font-size: 0.85em;
  font-weight: 600;
}

.role-owner {
  background: #cce5ff;
  color: #004085;
}

.role-admin {
  background: #d4edda;
  color: #155724;
}

.role-collaborator {
  background: #fff3cd;
  color: #856404;
}

.actions {
  margin-bottom: 1rem;
}

.actions button {
  margin-right: 0.5rem;
}