/* Reset básico */
* {
    box-sizing: border-box;
  }
  
  body {
    margin: 0;
    font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
    background: #f4f6f8;
    color: #333;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
  }
  
  .login-container {
    width: 100%;
    max-width: 420px;
    padding: 20px;
  }
  
  .login-box {
    background: white;
    padding: 30px 40px;
    border-radius: 8px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
    display: flex;
    flex-direction: column;
  }
  
  .login-header {
    text-align: center;
    margin-bottom: 25px;
  }
  
  .login-header h1 {
    margin: 0;
    font-size: 1.8rem;
    font-weight: 700;
    color: #1976d2;
  }
  
  .login-subtitle {
    margin-top: 8px;
    font-weight: 400;
    color: #666;
    font-size: 1rem;
  }
  
  form {
    display: flex;
    flex-direction: column;
  }
  
  label {
    font-weight: 600;
    margin-bottom: 6px;
    margin-top: 15px;
  }
  
  input[type="text"],
  input[type="password"] {
    padding: 12px 14px;
    border: 1.5px solid #ccc;
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
  }
  
  input[type="text"]:focus,
  input[type="password"]:focus {
    border-color: #1976d2;
    outline: none;
  }
  
  .login-button {
    margin-top: 25px;
    padding: 12px;
    background-color: #1976d2;
    border: none;
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
  }
  
  .login-button:hover,
  .login-button:focus {
    background-color: #115293;
    outline: none;
  }
  
  .error-message {
    margin-top: 20px;
    padding: 10px 15px;
    background-color: #ffdddd;
    color: #b00020;
    border: 1px solid #b00020;
    border-radius: 5px;
    font-weight: 600;
    text-align: center;
  }