@import url('https://fonts.googleapis.com/css2?family=Nunito&display=swap');
*{
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: Nunito;
}
.container{
    max-width: 600px;
    margin: auto;
    padding: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
:root{
    --primary-color:#ddbdbdf0;
}
body{
    background: url(https://wallpaperaccess.com/full/139854.jpg) no-repeat center center/cover;
    position: relative;
    min-height: 100vh;
}
a{
    text-decoration: none;
    color:black;
    cursor: pointer;
    display: inline-block;
    width: max-content;
    box-shadow: rgba(0, 0, 0, 0.19) 0px 10px 20px, rgba(0, 0, 0, 0.23) 0px 6px 6px;
}
input,label{
    font-weight: 700;
}
input:focus{
    outline: none;
}
img{
    border-radius: 10px;
    width: 320px;
    height: 320px;
}
h1,h2,h3{
    background: var(--primary-color);
    text-align: center;
    border-radius: 10px;
    padding: 10px;
}
/* index */
#main{
    display: flex;
    align-items: center;
    justify-content: center;
    height: 70vh;
}
#page_group{
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
#page_group>div{
    text-align: center;
    display: flex;
    flex-direction: column;
    margin: 20px;
    width: 100%;
}
/* output div */
.output_box{
    display: none;
    text-align: center;
    margin: 10px ;
    padding: 10px 20px;
    background: var(--primary-color);
    border-radius: 10px;
    font-weight: 800;
}

/* buttons */
.btn_main{
    background: var(--primary-color);
    border-radius: 10px;
    padding: 40px;
    width: 100%;
    margin: 10px;
    font-weight: 800;
    font-size: 1.6rem;
    display: inline-block;
}
.btn_main:hover{
    transform: scale(0.95);
    box-shadow: var(--primary-color) 0px 30px 60px -12px inset, #333 0px 18px 36px -18px inset;
}
.btn_sub{
    background: var(--primary-color);
    border-radius: 10px;
    border: none;
    width: max-content;
    padding: 8px 16px;
    margin: 10px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    display: inline-block;
    box-shadow: rgba(0, 0, 0, 0.19) 0px 10px 20px, rgba(0, 0, 0, 0.23) 0px 6px 6px;
}
.btn_sub:hover{
    transform: scale(1.05);
}

/* back button */
#back_to_home{
    background-color: var(--primary-color);
    font-weight: 700;
    border: 1px solid black;
    border-radius: 10px;
    padding: 12px 20px;
    margin-bottom: 20px;
}
#back_to_home:hover{
    transform: rotate(-5deg);
}
/* angles html */
#angle_main{
    padding: 20px;
    text-align: center;
}
#angles_sub{
    display: flex;
    flex-direction: column;
}
#angles_sub>*{
    padding: 10px;
    margin-bottom: 10px;
    border: 2px solid var(--primary-color);
    border-radius: 10px;
}
#angles_sub>*:focus{
    outline: none;
}

/* hyptonuse */
#hyptop{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}
#formHyp{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin: 20px;
}
#formHyp>*{
    padding: 10px;
}
#formHyp input{
    border-radius: 10px;
    border: none;
    padding: 10px ;
}

/* area html */
#area_select{
    padding: 20px;
}
input[type=radio]{
    width: 16px;
    height: 16px;
    margin: 7px;
}
#area_select div{
    margin-bottom: 15px;
}
#area_select label{
    background: var(--primary-color);
    padding:5px 10px;
    border: 1px solid black;
    border-radius: 5px;
}

#base_height,#given_lengths,#sides_angle{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}
.forms{
    padding-top: 15px;
    display: flex;
    flex-direction: column;
}
.forms input{
    padding: 7px 14px;
    border: 2px solid var(--primary-color);
    border-radius: 10px;
    margin-bottom: 5px;
}

/* quiz css */
.quizForm{
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.quiz_container{
    margin: 15px;
    background:var(--primary-color);
    border-radius: 20px;
    padding: 20px;
    width: 90%;
    font-weight: 700;
}
/* footer */
footer{
    width: 100%;
    text-align: center;
    padding: 10px;
}
footer #social{
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 10px 0;
}
#social a{
    margin: 5px;
    padding: 15px;
    border-radius: 50%;
}

/* mobile */
@media screen and (max-width:450px){
    h1,h2,h3{
        border-radius: 10px;
        padding: 8px;
        font-size: 22px;
    }
    #main{
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
    }
    #page_group{
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        padding: 5px;
    }
    #page_group>div{
        margin: 5px;
    }
    .btn_main{
        padding: 15px;
        font-size: medium;
    }
    .top{
        margin-bottom: 5px;
        background:var(--primary-color);
        border-radius: 20px;
        padding: 10px;
        width: 90%;
    }
}