/* Botão de login */
.login-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 10px 20px;
    background: #fff;
    border: none;
    cursor: pointer;
    font-size: 16px;
}

/* Popup */
.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.6);
    display: none;
    align-items: center;
    justify-content: center;
}

.popup {
    background: white;
    padding: 30px;
    border-radius: 10px;
    width: 300px;
    box-shadow: 0 0 10px black;
}

    .popup input {
        width: 100%;
        margin-bottom: 10px;
        padding: 8px;
    }

.close-btn {
    float: right;
    cursor: pointer;
    font-weight: bold;
    color: #888;
}