@font-face {
    font-family: ubuntu;
    src: url(Ubuntu-Medium.ttf);
}
:root{
    --main-font:ubuntu;
    --main-font-color:white;
    --secondry-font-color:#2E7D32;
}
*{
    box-sizing: border-box;
    margin: auto;
}
main{
    margin-top: 200px;
}
body{
     background-image: linear-gradient(to right bottom, #2e7d32, #267c38, #1f7a3d, #167942, #0d7747, #06764b, #02744f, #007353, #007157, #00705a, #006e5d, #006c60);
     background-repeat: no-repeat;
     background-size: cover;
     font-family: var(--main-font);
     color: var(--main-font-color);
}
.nav{
    display: flex;
    background-color: white;
    justify-content: space-around;
    align-items: center;
    flex-wrap: wrap;
    color: #2E7D32;
    font-family: var(--main-font);
    position: fixed;
    top: 0;
    width: 100%;
}
.nav button{
    background-color: var(--secondry-font-color);
    color: var(--main-font-color);
    border: none;
    border-radius: 7px;
    padding: 10px 20px;
    font-family: var(--main-font);

}
.nav ul{
    display: flex;
    justify-content: space-evenly;
}
.nav li{
    list-style-type: none;
    display: flex;
    align-items: center;
    justify-content: center;
    margin:10px;
    padding: 10px;
}
.nav-item{
    text-decoration-line: none;
    color: #2E7D32;
    padding:10px;
    border: 2px solid transparent;
    border-radius: 7px;

}
.nav-item:hover{
    border:2px solid #2E7D32;
    transition: 0.2s ease-in-out;
    border-radius: 7px;
}
.active{
    background-color: #2E7D32;
    color: var(--main-font-color);
}
.hero{
    font-family: var(--main-font);
    margin: 50px auto;
    display: flex;
    flex-direction: column;
    color: #2E7D32;
    background-color: var(--main-font-color);
    width: fit-content;
    justify-content: center;
    align-items: center;
    padding:30px 20px;
    border-radius: 25px;
    box-shadow: rgba(0, 0, 0, 0.25) 0px 54px 55px, rgba(0, 0, 0, 0.12) 0px -12px 30px, rgba(0, 0, 0, 0.12) 0px 4px 6px, rgba(0, 0, 0, 0.17) 0px 12px 13px, rgba(0, 0, 0, 0.09) 0px -3px 5px;
}
.calcs{
    display: flex;
    width:100%;
    height:300px;
    font-family: var(--main-font);
    color: var(--main-font-color);
    display: flex;
    justify-content: space-evenly;
}
.calculator{
    display:flex;
    justify-content: center;
    align-items: center;
    text-align: center;
    flex-direction: column;
    color: var(--main-font-color);
    font-family:var(--main-font)
}
.calculator .calcimg{
    width:15%;
    aspect-ratio: 1/1 ;
    height: auto;
}
.integral{
    display: flex;
    flex-direction: row;
    color: var(--main-font-color);
    font-family: var(--main-font);
    margin: 50px;
    text-align: center;
}
.integral img{
    width:50%;
    
    border-radius: 25px;
    box-shadow: rgba(0, 0, 0, 0.25) 0px 54px 55px, rgba(0, 0, 0, 0.12) 0px -12px 30px, rgba(0, 0, 0, 0.12) 0px 4px 6px, rgba(0, 0, 0, 0.17) 0px 12px 13px, rgba(0, 0, 0, 0.09) 0px -3px 5px;
}
.learnmore{
    margin: 20px;
    background-color: var(--main-font-color);
    text-decoration-line: none;
    color: var(--secondry-font-color);
    font-family: var(--main-font);
    padding: 10px;
    border-radius: 7px;
}
.learnmore:hover{
        box-shadow: rgba(0, 0, 0, 0.25) 0px 54px 55px, rgba(0, 0, 0, 0.12) 0px -12px 30px, rgba(0, 0, 0, 0.12) 0px 4px 6px, rgba(0, 0, 0, 0.17) 0px 12px 13px, rgba(0, 0, 0, 0.09) 0px -3px 5px;
        transition: 0.5s ease;
}
.integral h2,p{
    margin: 20px;
}
footer{
    background-color: var(--main-font-color);
    font-size: 36px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: var(--main-font);
    color: var(--secondry-font-color);
}
.contactus{
    display: flex;
    flex-direction: column;
    text-align: center;
}
.contactus h1,h2{
    margin:20px;
}
form{
    display:flex;
    flex-direction: column;
    justify-content: center;
    align-items:center;
    width: 100%;
}
form input, textarea{
    width: 30%;
    margin: 20px;
    font-size: 20px;
    border-radius: 8px;
}
form div{
    margin: 50px;
}
.Send{
    font-family: var(--main-font);
    background-color: var(--secondry-font-color);
    color: var(--main-font-color);
    font-size: 15px;
    padding:10px 20px;
    border: none;
    margin: 0 10px;
    cursor: pointer;
    border-radius: 10px;
    box-shadow: rgba(0, 0, 0, 0.25) 0px 54px 55px, rgba(0, 0, 0, 0.12) 0px -12px 30px, rgba(0, 0, 0, 0.12) 0px 4px 6px, rgba(0, 0, 0, 0.17) 0px 12px 13px, rgba(0, 0, 0, 0.09) 0px -3px 5px;
}
.clear{
    background-color: var(--main-font-color);
    color: var(--secondry-font-color);
    border: none;
    border-radius: 10px;
    font-size: 15px;
    padding:10px 20px;
    margin: 0 10px;
    cursor: pointer;
}
.other{
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
}
.other-part{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
}
.other-part img{
    width: 12%;
    margin: 50px 25px;
}
.heading{
    display:flex;
    flex-direction:row ;
    align-items: center;
    justify-content: center;
    margin-bottom: 30px;
}
.heading img{
    width: 10%;
    margin: 0;
    margin-left: 20px;
}
.heading h1{
    width: 300px;
    margin: 0;
    margin-left:20px;
}
.int-h3{
    text-align: center;
}
.probleminp{
    display: flex;
    justify-content: center;
    align-items:center;
    margin:40px 10px 40px auto;
    border-radius: 10px;
    width: 70%;
    aspect-ratio:21/1;
    height: auto;
    box-shadow: rgba(0, 0, 0, 0.25) 0px 54px 55px, rgba(0, 0, 0, 0.12) 0px -12px 30px, rgba(0, 0, 0, 0.12) 0px 4px 6px, rgba(0, 0, 0, 0.17) 0px 12px 13px, rgba(0, 0, 0, 0.09) 0px -3px 5px;
    font-size: large;
}
.problem button{
    color: var(--secondry-font-color);
    background-color: var(--main-font-color);
    border:none;
    font-weight: bold;
    font-size: large;
    height: calc(70% / 21);
    padding: 10px 20px;
    border-radius: 7px;
    margin:40px auto 40px 10px;
    box-shadow: rgba(0, 0, 0, 0.25) 0px 54px 55px, rgba(0, 0, 0, 0.12) 0px -12px 30px, rgba(0, 0, 0, 0.12) 0px 4px 6px, rgba(0, 0, 0, 0.17) 0px 12px 13px, rgba(0, 0, 0, 0.09) 0px -3px 5px;
}
.problem button:active {
  box-shadow: none;
  transition: 0.1s ease-in-out;
  transform: scale(0.95);
}
.problem{
    display: flex;
    flex-direction: row;
}
.integral-calc{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin-bottom:50px ;
}
.darktheme{
    background-color: black;
    --main-font-color:black;
}