body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #121212;
  color: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}
.container {
  text-align: center;
}
.logo {
  width: 100px;
  margin-bottom: 20px;
}
.auth-buttons .btn {
  display: inline-block;
  margin: 10px;
  padding: 10px 20px;
  background-color: #1f1f1f;
  color: white;
  text-decoration: none;
  border-radius: 6px;
  border: 1px solid #444;
}
.navbar {
  background-color: #1f1f1f;
  padding: 20px;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 20px;
  padding: 40px;
  width: 100%;
  max-width: 1000px;
}
.tool-card {
  background: #222;
  padding: 20px;
  border-radius: 10px;
  text-align: center;
  text-decoration: none;
  color: white;
  border: 1px solid #444;
}
.btn-logout {
  color: white;
  text-decoration: none;
  padding: 8px 14px;
  border: 1px solid #444;
  border-radius: 5px;
}