*{
    margin:0;
    padding:0;
    box-sizing: border-box;
    font-family:'Source Sans Pro',sans-serif;  
    scroll-behavior:smooth;
}

body{
    margin:0;
    padding:0;
    background-color: var(--wht);
    position:relative;
    width:calc(100vw - 10px);
    height: 100vh;
}


h4{
    font-size: var(--font);
    font-weight: var(--font-weight);
    margin:0;
    padding:0;
}
h3{
    font-size: calc(var(--font) * 1.2);
    font-weight: var(--font-weight);
    letter-spacing: 0.025em;
}
h2{
    font-size: calc(var(--font) * 1.4);
    font-weight: var(--font-weight);
    margin:0;
    padding:0;
}

h1{
    font-size: calc(var(--font) * 1.6);
    font-weight: var(--font-weight);
    letter-spacing: 0.025em;
}


p{
    font-size: var(--font);
    margin:10px 0;
    font-weight:300;
    line-height: 1.3em;
}

button,a,select{
    cursor:pointer;
}

.chapter{
    position:relative;
    width:100%;
    color: var(--bl);
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
}

.chapter .title{
    position:relative;
    text-align: center;
    margin: 50px 0;
    
}
.chapter .title h2{
    font-weight: 700;
    letter-spacing: .05em;
}

.chapter .title h2::before{
    content:'';
    position:absolute;
    left:50%;
    transform:translateX(-50%);
    bottom:-20px;
    width:60px;
    height:4px;
    background: var(--grn)
}

.chapter + .content{
    width:var(--width);
}



.black-panel{
    position:relative;
    background: var(--bl);
    box-shadow: 0 5px 15px rgba(0,0,0,.2);
}

.black-panel::before{
    content:'';
    position:absolute;
    top:0;
    right:0;
    border:20px solid transparent;
    border-top:20px solid var(--grn);
    border-right:20px solid var(--grn);
}

.white-panel{
    background: var(--wht);
    border-bottom: 3px solid var(--grn);
    position:relative;
}

.white-panel-shadow{
    box-shadow: 0 5px 15px rgba(0,0,0,.2);
}

.white-panel-big{
    box-shadow: 0 10px 30px rgba(0,0,0,.2);
}
.white-panel-small{
    box-shadow: 0 5px 15px rgba(0,0,0,.2);
}

.white-panel-2{
    position:relative;
    background: var(--wht);
    box-shadow: 0 5px 15px rgba(0,0,0,.2);
    cursor:pointer;
}

.white-panel-2::before{
    content:'';
    position:absolute;
    top:0;
    right:0;
    border:10px solid transparent;
    border-top:10px solid var(--grn);
    border-right:10px solid var(--grn);
}


.default-btn{
    width:230px;
    background:var(--grn);
    color:var(--bl);
    border:none;
    position:relative;
    padding:10px 15px;
    margin:15px;
    cursor:pointer;
    font-weight:500;
    letter-spacing:2px;
    font-size:var(--font);
    box-shadow: 0 5px 15px rgba(0,0,0,.3);
}

.default-btn:hover{
    opacity: .9;
}
.body-scroll-inactive{
    overflow:hidden;
}

.logo{
    text-decoration: none;
}

.logo h1{
    color:var(--bl);
    font-weight: calc(var(--font-weight) + 200);
    margin-bottom: 10px;
}

.logo h3{
    color:var(--grn);
}

.logo-content{
    width:100%;
    height:80px;
    display:flex;
    justify-content: flex-start;
    align-items: flex-start;
}

.wht-bgrd{
    background:var(--wht);
    color:var(--bl);
}
.grn-bgrd{
    background:var(--grn);
}
.bl-bgrd{
    background:var(--bl);
    color:var(--wht);
}
.yl-bgrd{
    background:var(--yl1);
    color:var(--bl);
}
.gr-bgrd{
    background:var(--gr1);
    color:var(--bl);
}