*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    scroll-behavior:smooth;
}


body{

    font-family:Arial, sans-serif;
    background:#f4f4f4;
    color:#333;

}


/* ================= HEADER ================= */


.header{

    width:100%;
    border-collapse:collapse;

    background:linear-gradient(
        135deg,
        #6c5ce7,
        #00cec9,
        #0984e3
    );

    background-size:400% 400%;

    animation:headerGradient 12s ease infinite;

    box-shadow:0 4px 12px rgba(0,0,0,.2);

    position:fixed;

    top:0;
    left:0;

    z-index:1000;

}



.header td{

    padding:18px 20px;

}



.logo{

    display:flex;

    align-items:center;

    gap:12px;

    font-size:22px;

    font-weight:bold;

    color:white;

    white-space:nowrap;

}



.logo img{

    width:50px;

    height:50px;

}



.nav-container{

    width:80%;

    text-align:right;

}



/* ================= MENU TOGGLE ================= */


.menu-toggle{

    display:none;

    color:white;

    font-size:28px;

    cursor:pointer;

}



/* desktop menu */


.menu{

    display:flex;

    justify-content:center;

    align-items:center;

    gap:5px;

}



.menu a{

    color:white;

    text-decoration:none;

    font-size:15px;

    font-weight:600;

    padding:10px 12px;

    border-radius:8px;

    transition:.3s ease;

}



.menu a:hover{

    background:rgba(255,255,255,.25);

    color:#ffd700;

    transform:translateY(-3px);

}




/* ================= CONTENT ================= */


.content{

    width:100%;

    border-collapse:collapse;

    margin-top:95px;

}



.content tr{

    vertical-align:top;

}


/* ================= SIDEBAR ================= */


.sidebar{

    position:fixed;

    top:120px;

    left:10px;

    width:18%;

    padding:15px;

}



.sidebar h3{

    text-align:center;

    color:#2c3e50;

    font-size:22px;

    margin-bottom:15px;

}



.sidebar ul{

    list-style:none;

}



.sidebar li{

    margin:12px 0;

}



.sidebar a{

    position:relative;

    display:block;

    text-decoration:none;

    color:#333;

    padding:10px 15px;

    border-radius:8px;

    overflow:hidden;

    z-index:1;

    transition:.4s ease;

}



.sidebar a::before{

    content:"";

    position:absolute;

    top:0;

    left:-100%;

    width:100%;

    height:100%;

    background:linear-gradient(
        135deg,
        #6c5ce7,
        #00cec9,
        #0984e3
    );

    transition:.4s ease;

    z-index:-1;

}



.sidebar a:hover::before{

    left:0;

}



.sidebar a:hover{

    color:white;

    box-shadow:0 6px 15px rgba(9,132,227,.35);

}


/* ================= MAIN CONTENT ================= */


.main-content{

    width:82%;

    margin-left:18%;

    background:white;

    padding:30px;

}



.main-content h2{

    color:#2c3e50;

    font-size:32px;

    margin-bottom:15px;

}



.main-content h3{

    color:#34495e;

    font-size:24px;

    margin:25px 0 15px;

}



.main-content p{

    line-height:28px;

    text-align:justify;

    font-size:16px;

}



.main-content ul{

    padding-left:25px;

    line-height:2;

}



pre{

    background:#2d3436;

    color:white;

    padding:20px;

    border-left:5px solid #3498db;

    border-radius:12px;

    overflow:auto;

    line-height:1.7;

}



hr{

    margin:35px 0;

    border:0;

    border-top:1px solid #ccc;

}

/* ================= ANIMATIONS ================= */


@keyframes headerGradient{

    0%{
        background-position:0% 50%;
    }

    25%{
        background-position:50% 100%;
    }

    50%{
        background-position:100% 50%;
    }

    75%{
        background-position:50% 0%;
    }

    100%{
        background-position:0% 50%;
    }

}


/* ================= TABLET DEVICES ================= */


@media screen and (min-width:768px) and (max-width:1024px){


    .logo{

        font-size:20px;

    }


    .menu{

        gap:2px;

    }


    .menu a{

        font-size:13px;

        padding:8px;

    }


    .sidebar{

        width:22%;

    }


    .main-content{

        width:78%;

        margin-left:22%;

        padding:25px;

    }


    .main-content h2{

        font-size:28px;

    }


}




/* ================= MOBILE 425px ================= */


@media screen and (min-width:425px) and (max-width:767px){


    .header td{

        padding:12px;

    }



    .logo{

        font-size:18px;

    }



    .logo img{

        width:40px;

        height:40px;

    }



    .nav-container{

        position:relative;

        width:auto;

    }



    .menu-toggle{

        display:block;

        text-align:right;

    }



    .menu{

        position:absolute;

        top:55px;

        right:0;

        width:230px;

        background:#6c5ce7;

        display:none;

        flex-direction:column;

        padding:15px;

        border-radius:10px;

        box-shadow:0 5px 15px rgba(0,0,0,.3);

    }



    /* Hover menu open */

    .nav-container:hover .menu{

        display:flex;

    }



    .menu a{

        width:100%;

        text-align:center;

        padding:12px;

    }



    .content{

        margin-top:80px;

    }



    .sidebar{

        position:relative;

        top:auto;

        left:auto;

        width:100%;

        padding:20px;

    }



    .main-content{

        width:100%;

        margin-left:0;

        padding:20px;

    }



    .main-content h2{

        font-size:26px;

    }



    .main-content h3{

        font-size:21px;

    }


}




/* ================= MOBILE 375px ================= */


@media screen and (min-width:375px) and (max-width:424px){


    .header{

        height:auto;

    }



    .header td{

        padding:10px;

    }



    .logo{

        font-size:16px;

        gap:8px;

    }



    .logo img{

        width:35px;

        height:35px;

    }



    .menu-toggle{

        display:block;

    }



    .menu{

        position:absolute;

        right:10px;

        top:55px;

        width:220px;

        background:#0984e3;

        display:none;

        flex-direction:column;

        border-radius:10px;

        padding:10px;

    }



    .nav-container:hover .menu{

        display:flex;

    }



    .menu a{

        font-size:14px;

        padding:10px;

    }



    .content{

        display:block;

        margin-top:75px;

    }



    .sidebar{

        position:relative;

        width:100%;

        top:0;

        left:0;

    }



    .main-content{

        width:100%;

        margin-left:0;

        padding:15px;

    }



    .main-content h2{

        font-size:24px;

    }



    pre{

        font-size:13px;

        padding:15px;

    }


}




/* ================= MOBILE 320px ================= */


@media screen and (min-width:320px) and (max-width:374px){


    .header td{

        padding:8px;

    }



    .logo{

        font-size:14px;

        gap:5px;

    }



    .logo img{

        width:32px;

        height:32px;

    }



    .menu-toggle{

        display:block;

        font-size:24px;

    }



    .menu{

        position:absolute;

        top:48px;

        right:5px;

        width:190px;

        background:#6c5ce7;

        display:none;

        flex-direction:column;

        padding:8px;

        border-radius:8px;

    }



    .nav-container:hover .menu{

        display:flex;

    }



    .menu a{

        font-size:12px;

        padding:8px;

    }



    .sidebar{

        position:relative;

        width:100%;

        padding:10px;

    }



    .sidebar h3{

        font-size:18px;

    }



    .main-content{

        width:100%;

        margin-left:0;

        padding:12px;

    }



    .main-content h2{

        font-size:22px;

    }



    .main-content h3{

        font-size:18px;

    }



    .main-content p{

        font-size:14px;

        line-height:24px;

    }



    pre{

        font-size:11px;

        padding:12px;

    }


}