body {
    font-family: Arial;
    background: linear-gradient(135deg, #2ecc71, #27ae60);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 0; /* 🔥 importante */
}

.login-box {
    background: white;
    padding: 30px;
    border-radius: 12px;
    width: 300px;
    text-align: center;
}

/* 🔥 aplica pros dois */
.login-box input,
.login-box button {
    width: 100%;
    padding: 10px;
    margin: 10px 0;
    box-sizing: border-box; /* 🔥 resolve o problema de tamanho */
}

/* botão */
.login-box button {
    background: #2ecc71;
    color: white;
    border: none;
    cursor: pointer;
}

/* erro */
.erro {
    background: #ffdddd;
    color: #c0392b;
    padding: 10px;
    border-radius: 6px;
    margin-bottom: 10px;
}