body, html {
  margin: 0;
  padding: 0;
  background-color: #0f1115;
  font-family: 'Segoe UI', sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  color: #fff;
}

.login-box {
  background: #1e1e1e;
  border-radius: 10px;
  padding: 25px 20px;
  width: 100%;
  max-width: 350px;
  box-shadow: 0 0 15px rgba(0,0,0,0.6);
  text-align: center;
  border-top: 3px solid #0d6efd;
}

.login-box h2 {
  margin-bottom: 20px;
  font-size: 1.2rem;
  font-weight: bold;
  color: #f1f1f1;
}

.login-box input {
  width: 100%;
  padding: 10px 12px;
  margin-bottom: 12px;
  background: #2b2b2b;
  border: 1px solid #333;
  border-radius: 6px;
  font-size: 15px;
  color: #f1f1f1;
  box-sizing: border-box;
}

.login-box input:focus {
  outline: none;
  border-color: #0d6efd;
}

.login-box button {
  width: 100%;
  padding: 10px;
  background-color: #0d6efd;
  border: none;
  border-radius: 6px;
  font-size: 15px;
  font-weight: bold;
  color: white;
  cursor: pointer;
  transition: background 0.3s ease;
}

.login-box button:hover {
  background-color: #0a58ca;
}

.erro {
  background: #c62828;
  color: white;
  padding: 10px;
  border-radius: 6px;
  margin-bottom: 15px;
  font-size: 14px;
}