style.css

* {
    margin: 0px;
}

/*Nawigacja*/
nav img {
    height: 1em;
    width: 3em;
}

nav a {
    color: black;
    text-decoration: none;
    font-size: 1.2em;
    margin: 0 12px;
    transition: color 0.35s;
}

nav {
    display: flex;
    width: 100%;
    height: 70px;
    font-size: 1.6em;
    justify-content: space-between;
    background-color: rgb(240, 238, 238);
    align-items: center;
}

nav a[href="index.html#home"] {
    color: rgb(47, 255, 29);
}

nav a:hover {
    color: rgb(47, 255, 29);
}

/*Baner*/
.main-heading {
    display: flex;
    background-image: url(Zdjecia/Baner.webp);
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    height: 950px;
    width: 100%;
    color: rgb(55, 320, 59);
    justify-content: center;
    text-align: center;
    background-attachment: fixed;
    background-size: 100% 100%;
    /* rgb(132, 241, 42) */
    /* rgb(126, 241, 59) */
}

h1 {
    margin-top: 80px;

}

.main-heading section h1,
.main-heading section p {
    font-size: 290%;
    margin-right: 40px;
    line-height: 1.8em;
}

.main-heading section p {
    line-height: 1em;
}

.main-heading section h1 {
    font-size: 4.8em;
}

/*O nas*/
.main-introduction {
    display: flex;
    justify-content: space-evenly;
    width: 100%;
    height: 550px;
    background-color: rgb(240, 238, 238);
    text-align: center;
}

.main-introduction h2 {
    font-size: 2em;
    margin-top: 120px;
    margin-bottom: 25px;
}

.onas-text {
    line-height: 18px;
    width: 35%;
    font-size: 1.25em;
}

.introduction-image {
    width: 35%;
    margin-top: 120px;
    margin-bottom: 25px;
}

/* Offer */
.offer {
    width: 100%;
    height: 400px;
    text-align: center;
    background-color: white;
}

.offer>h2 {
    font-size: 2.2em;
    margin: 30px;
}

.offer-block {
    display: flex;
    justify-content: space-evenly;
}

.offer-block>section {
    width: 25%;
    margin: 10px;
}

.offer-block section>h3 {
    font-size: 1.6em;
}

.offer-block section>img {
    width: 11%;
    height: 50px;
}

/* Reviews */
.reviews {
    width: 100%;
    height: 500px;
    background-color: rgb(29, 230, 11);
}

.reviews>h2 {
    margin-top: 10px;
}

.reviews-box {
    display: flex;
    align-items: center;
}

.reviews-block {
    display: flex;
    justify-content: space-evenly;
}

.left-reviews {
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: center;
    font-size: 1.1em;
}

.left-reviews a {
    text-decoration: none;
    color: black;
    font-size: 1.11em;
    transition: color 0.35s;
}

.left-reviews a:hover {
    color: rgb(29, 230, 11);
}

.reviews>h2,
.reviews>p {
    text-align: center;
    font-size: 1.2em;
}

.reviews>h2 {
    font-size: 2em;
    margin: 10px 0;
}

.reviews-block article {
    width: 20%;
    margin: 30px;
    background-color: white;
    border-radius: 5%;
    padding: 15px;
}

.stars {
    color: gold;
    margin-bottom: 4px;
}

.author {
    margin-top: 3px;
}

.reviews-number {
    margin: 5px 0;
}

/* Newsletter */
.newsletter {
    width: 100%;
    height: 350px;
    text-align: center;
    margin-top: 120px;
}

.above-h2 {
    color: rgb(29, 230, 11);
    font-size: 1.25em;
}

.newsletter>h2 {
    margin: 10px 0;
    font-size: 2.2em;
}

.newsletter input[type="submit"] {
    background-color: rgb(29, 230, 11);
    border: 0px;
    padding: 8.5px;
    border-radius: 13%;
}

.newsletter input[type="submit"]:hover {
    background-color: rgb(38, 206, 23);
}

.newsletter input[type="email"] {
    border: 2px solid rgb(29, 230, 11);
    padding: 8.5px;
}

label[for="check"] {
    position: relative;
    padding-left: 3rem;
    margin-bottom: 0;
    cursor: pointer;
    color: #bcbcbc;
    min-height: 2rem;
    font-size: 1.2rem;
    line-height: 1.4rem;
    user-select: none;
}

form>section {
    display: flex;
    justify-content: center;
    margin-top: 12px;
}

.checkbox {
    width: 30%;
}

/*Footer*/
footer {
    display: flex;
    width: 100%;
    height: 300px;
    background-color: rgb(29, 230, 11);
    justify-content: space-around;
    font-size: 1.2em;
    align-items: center;
}

footer>.left {
    display: flex;
    justify-content: space-between;
    margin: 10px;
    margin-right: 185px;
}

footer .nav {
    display: flex;
    flex-direction: column;
}

footer .nav a:hover {
    color: white;
}

footer .nav a {
    text-decoration: none;
    color: black;
    transition: color 0.35s;
}

footer .kontakt {
    margin: 0 50px;
}

.right h3 {
    font-size: 1.6em;
    color: white;
    text-align: center;
}

.left h3 {
    font-size: 1.6em;
    color: white;
    margin-bottom: 10px;
}

.right section {
    display: flex;
    justify-content: space-evenly;
    margin-top: 30px;
}

.right {
    margin-right: 4px;
}

.right section a i {
    margin-top: 30px;
    margin-right: 15px;
    color: rgb(29, 230, 11);
    background-color: white;
    padding: 8px;
    border-radius: 50%;
}

.right section a i:hover {
    background-color: #bcbcbc;
}