cat_ninia/style.css

body {
 font-family: sans-serif;
 margin: 0;
 padding: 0;
}

header {
 background-color: #1AAB8A;
 color: #fff;
 padding: 20px;
}

nav ul {
 list-style: none;
 margin: 0;
 padding: 0;
}

nav li {
 display: inline-block;
 margin-left: 20px;
}

nav a {
 color: #fff;
 text-decoration: none;
 font-size: 18px;
}

main {
 max-width: 900px;
 margin: 0 auto;
 padding: 20px;
}

.services ul {
 list-style: none;
 margin: 0;
 padding: 0;
}

.services ul li {
 margin-bottom: 10px;
}

.prices table {
 border-collapse: collapse;
 width: 100%;
 margin-top: 20px;
}

.prices th, .prices td {
 padding: 10px;
 text-align: center;
}

.prices th {
 background-color: #1AAB8A;
 color: #fff;
}

.prices tr:nth-child(even) {
 background-color: #eeeeee;
}

.contact ul {
 list-style: none;
 margin: 0;
 padding: 0;
}

.contact form {
 margin-top: 20px;
 display: flex;
 flex-wrap: wrap;
}

.contact label {
 display: block;
 margin-bottom: 10px;
 flex-basis: 100%;
}

.contact label input, .contact label textarea {
 width: 100%;
 padding: 10px;
 border-radius: 5px;
 border: 1px solid #ccc;
 margin-top: 5px;
 font-size: 16px;
 box-sizing: border-box;
}

.contact label input:focus, .contact label textarea:focus {
 outline: none;
 border-color: #1AAB8A;
}

.contact button[type="submit"] {
 background-color: #1AAB8A;
 color: #fff;
 border: none;
 padding: 10px 20px;
 margin-top: 20px;
 border-radius: 5px;
 font-size: 18px;
 cursor: pointer;
}