body {
    background: linear-gradient(135deg, #000 0%, #e30613 100%);
    /* Degradê preto para vermelho do logo */
    min-height: 100vh;
    margin: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
.login-container {
    background: #fff;
    padding: 2rem 2.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.12);
    max-width: 350px;
    width: 100%;
    border-top: 4px solid #e30613;
    margin: 16px;
}
.logo {
    display: flex;
    justify-content: center;
    margin-bottom: 1.2rem;
}
.logo img {
    max-width: 220px;
    height: auto;
}
.erro {
    color: #e30613;
    text-align: center;
    margin-bottom: 1rem;
}
label {
    color: #000;
    font-weight: 500;
    margin-bottom: 0.2rem;
    display: block;
}
.form-group {
    margin-bottom: 1.1rem;
}
input[type="text"], input[type="password"] {
    width: 100%;
    padding: 0.7rem;
    border: 1px solid #cccccc;
    border-radius: 6px;
    font-size: 1rem;
    transition: border 0.2s;
    margin: 0;
    box-sizing: border-box;
    color: #000;
}
input[type="text"]:focus, input[type="password"]:focus {
    border: 1.5px solid #e30613;
    outline: none;
}
button[type="submit"] {
    width: 100%;
    padding: 0.8rem;
    background: linear-gradient(90deg, #e30613, #000);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.2s;
}
button[type="submit"]:hover {
    background: linear-gradient(90deg, #000, #e30613);
}
@media (max-width: 480px) {
    body {
        padding: 0;
    }
    .login-container {
        padding: 1.2rem 0.7rem;
        max-width: 100vw;
        margin: 10px;
    }
    .logo img {
        max-width: 140px;
    }
}