h1{
    text-align: center;
    font-size: 29pt;
}
nav{
    width: fit-content;
    margin-left: auto;
    margin-right: 2%;
    display: flex;
    & a{
        transform-origin: center center;
        font-size: 15pt;
        margin: 10px;
        text-decoration: none;
        color: black;
        transform: rotateY(0deg);
        transition: 0.5s;
        background-color: white;
        height: fit-content;
        padding: 5px;
    }
    & a:hover{
        transform-origin: center center;
        transform: rotateY(360deg);
        transition: 0.5s;
        color: white;
        background-color: black;
    }
}
#head_nav{
    display: flex;
}
img#x_logo{
    width: 40px;
    height: 40px;
}
#x{
    display: flex;
    justify-content: center;
    font-size: 30px;
}
.main_content{
    margin: auto;
    width: 50%;
    & p,li{
        font-size: 14pt;
    }
    & h2{
        padding: 20px;
        font-size: 22pt;
        background-color: rgba(73, 199, 57, 0.517);
        box-shadow: 3px 3px 15px black;
    }
    & h3{
        font-size: 18pt;
        padding: 20px;
        background-color: rgba(128, 128, 128, 0.338);
        border-left: 7px black solid;
        border-right: 7px white solid;
    }
    & h4{
        font-size: 16pt;
        background: linear-gradient(rgba(0,0,0,0) 50%, rgb(111, 214, 195) 100%);
    }
    & img{
        display: block;
        margin: 20px auto;
        width: 75%;
    }
    & math.formula{
        font-size: 27pt;
    }
    & img#thumb_nail{
        width: 95%;
    }
    & a:not(.not_decorate){
        text-align: left;
        display: block;
        text-decoration: none;
        color: black;
        min-width: 70%;
        max-width: 90%;
        min-height: 100px;
        margin: 20px auto;
        background-color: white;
        border: gray 4px solid;
        box-shadow: gray 5px 5px 10px;
        padding: 7px;
        transition: 0.2s;
        & div{
            display: flex;
            width: fit-content;
            & img{
                display: block;
                margin: auto;
                width: auto;
                height: 120px;
                margin-right: 10px;
                border: black 3px solid;
                transition: 0.2s;
            }
            & section{
                & h5{
                    font-size: 14pt;
                    display: block;
                    margin: 0;
                    margin-bottom: 5px;
                }
                & p{
                    display: block;
                    margin: 0;
                    font-size: 11pt;
                }
            }
        }
    }
    & a:not(.not_decorate):hover{
        transform: translateX(-10px) translateY(-10px) scale(1.05);
        box-shadow: gray 10px 10px 30px;
        transition: 0.2s;
        & img{
            opacity: 0.7;
            transition: 0.2s;
        }
    }
}
#latest{
    border: gray 4px solid;
    background-color: white;
    margin: auto;
    width: 90%;
}
@media screen and (max-width: 1400px) {
    h1{
        font-size: 16pt;
    }
    #head_nav{
        display: block;
    }
    .main_content{
        width: 90%;
        & p{
            font-size: 11pt;
        }
        & li{
            font-size: 11pt;
        }
        & h2{
            font-size: 18pt;
            padding: 10px;
        }
        & h3{
            font-size: 16pt;
            padding: 7px;
        }
        & h4{
            font-size: 13pt;
        }
        & img{
            width: 90%;
        }
        & a:not(.not_decorate){
            width: 95%;
            height: fit-content;
            min-height: fit-content;
            & div{
                display: block;
                width: fit-content;
                margin: auto;
                & img{
                    display: block;
                    margin: auto;
                    width: auto;
                    height: 100px;
                    margin-right: auto;
                    border: black 3px solid;
                }
                & section{
                    & h5{
                        font-size: 12pt;
                        display: block;
                        margin: 0;
                        margin-bottom: 5px;
                    }
                    & p{
                        display: block;
                        margin: 0;
                        font-size: 10pt;
                    }
                }
            }
        }
    }
}