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

body{
    font-family:'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
    background-color: #f1f1f1;
}
    #main{
        margin: 10px auto;
        padding: 5px 0;
        border: 2px solid burlywood;
        border-radius: 10px;
        background-color: #f5f5f5;
    }

h1{
    margin: 12px;
}
    .page-title{
        margin: 20px 0;
        text-align: center;
    }

    .sub-title{
        margin: 35px 0 10px 0;
    }

    .description{
        margin: 10px;
    }

    .margin-center{
        margin: 0 auto;
    }

a{
    text-decoration: none;
    color: #333;
}
    a:hover{
        color: #913a00;
    }
    a:visited{
        text-decoration: underline;
    }

#menu{
    display: flex;
    justify-content: flex-start;
    align-items: flex-start;
    flex-wrap: wrap;
}
    .link{
        padding: 10px;
        margin: 5px;
        background-color: #fff;
        border-radius: 5px;
        box-shadow: 0 0 5px rgba(0,0,0,0.1);
    }

#page-description{
    min-height: 300px;
}
    .wip{
        font-size: 12px;
        color: #02c7c7;
    }

.flex{
    display: flex;
    justify-content: space-around;
    align-items: flex-start;
}
    .flex-ovf{
        flex-wrap: wrap;
    }

.container{
    /* width: 800px; */
    margin: 10px auto;
    padding: 5px 20px;
    border: 1px solid burlywood;
    border-radius: 10px;
    background-color: #f1f1f1;
}

/* position */
.rel{ position: relative; }
.abs{ position: absolute; }

/* size */
.full-width{ width: 100%; }

.xx-small{ width: 180px; }
.x-small{ width: 300px; }
.small{ width: 400px; }
.medium{ width: 600px; }
.large{ width: 800px; }
.x-large{ width: 1000px; }

.xx-height{ height: 80px; }
.xs-height{ height: 125px; }
.s-height{ height: 200px; }
.m-height{ height: 400px; }
.l-height{ height: 600px; }
.xl-height{ height: 800px; }

/* colors */
.bg-white{ background-color: white; }
.bg-red{ background-color: red; }
.bg-green{ background-color: green; }
.bg-blue{ background-color: blue; }

/* input - buttons */
.btn{
    padding: 10px 20px;
    margin: 10px;
    border: none;
    border-radius: 5px;
    background-color: #913a00;
    color: #fff;
    font-size: 16px;
    cursor: pointer;
}
    .btn:hover{ background-color: #b54e00; }

.input-txt{
    padding: 10px;
    margin: 10px;
    border: 1px solid #913a00;
    border-radius: 5px;
    font-size: 16px;
}

.input-small{ width: 100px; }
.input-medium{ width: 200px; }
.input-large{ width: 300px; }