html,
body {
    height: 100%;
    width: 100%;
    position: relative;
    margin: 0px auto;
    padding: 0px 0px 0px 0px;
    background-color: whitesmoke;
    font-family: 'Roboto', sans-serif;
}

article {
    height: 100%;
    width: 100%;
}

nav {
    height: 10%;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 20px;
    box-shadow: 2px 2px 20px #8c8c8c;
}

nav ul,
ul li {
    list-style: none;
    margin: 0;
    padding: 0 15px 0 0;
    text-align: right;
}

nav ul li {
    display: inline-block;
    vertical-align: middle;
    white-space: nowrap;
}

nav li a {
    padding: 5px;
    text-decoration: none;
    color: #696969;
    font-size: 20px;
    font-weight: bold;
    vertical-align: middle;
}

a:hover {
    background-color: #F0E68C;
}

#samolot {
    height: 100px;
    width: 150px;
    padding: 0 0 30px 30px;
}
.bilet{
    float: left;
    height: 50%;
    width: 25%;
    margin: 15px 0 0 15px;
}
#rectangle_top{
    width: 98%;
    height: 10%;
    background-color: black;
}
p{
    padding: 0;
    margin: 5px auto 0 0;
    font-family: 'Roboto', sans-serif;
}
input[type="text"]{
    height: 4%;
    width: 98%;
}
input[type="button"]{
    margin: 15px 0 auto auto;
    padding: 0 0 0 0;
    width: 99%;
    height: 50px;
    border-radius: 8px;
    border-style: none;
    background-color:  #ffa31a;
}
.textpanel{
    float: left;
    margin: 15px 0 0 15px;
    height: 50%;
    width: 63%;
    

}
#palmy{
    height: 60%;
    width: 100%;
    background-image: url(http://s1.1zoom.me/big0/375/USA_Coast_Hawaii_Palma_482728.jpg);
    background-repeat: no-repeat;
}
#main_text p:first-child{
    font-size: 50px;
    
}
#main_text p:nth-child(2){
    font-size: 25px;
}
.ad{
    float: left;
    height: 50%;
    width: 10%;
    margin: 15px auto auto 5px; 
    background-image: url(https://www.tekstowo.pl/upload/soundtracks/9697_big.jpg)
}
.ad p:first-child{
    margin: 0 33% 0 33%;
    writing-mode: vertical-rl;
    text-orientation: upright;
    text-transform: uppercase;
    word-wrap: break-word;
    font-weight: bold;
    font-size: 57px;
}
.footer{
    height: 25%;
    width: 100%;
    float: initial;
}
#left{
    float: left;
    width: 98%;
    height: 10%;
    background-color: black;
}