* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    background-color: #1a1a1a;
    color: #ffffff;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.logo {
    text-align: center;
    margin-bottom: 40px;
}

.logo img {
    max-width: 200px;
    height: auto;
}

.login-form {
    background-color: #252525;
    padding: 30px;
    border-radius: 10px;
}

h2 {
    text-align: center;
    margin-bottom: 30px;
    color: #ffffff;
}

.input-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    color: #ffffff;
}

input {
    width: 100%;
    padding: 12px;
    background-color: #333333;
    border: none;
    border-radius: 5px;
    color: #ffffff;
    font-size: 16px;
}

input:focus {
    outline: none;
    box-shadow: 0 0 0 2px #ff0000;
}

.btn-entrar {
    width: 100%;
    padding: 12px;
    background-color: #ff0000;
    color: #ffffff;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn-entrar:hover {
    background-color: #cc0000;
}

.error-message {
    background-color: #ff6b6b;
    color: white;
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 15px;
    text-align: center;
    font-weight: bold;
    animation: shake 0.5s;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}