style.css

* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    text-decoration: none;
    list-style-type: none;
}
body {
    font-family: 'Roboto', sans-serif;
    background: url('images/bg.jpg');
    background-repeat: no-repeat;
    background-position: center center;
    background-attachment: scroll;
    background-size: cover;
}

nav {
    height: 50px;
    width: 100%;
    padding: 20px 0;
}
.container {
    padding: 30px !important;
}
@media (min-width: 768px) {
    .container {
        width: 1200px;
        max-width: 85%;
        margin: 0 auto;
        padding: 0 !important;
    }
}

nav ul {
    display: flex;
    justify-content: flex-end;
    margin: 0px 6px;
}
nav ul li a {
    color: #fff;
    padding: 10px;
    text-transform: uppercase;
}
nav ul li a:hover,
a.active {
    background-color: #3352f2;
    border-radius: 5px;
}
.main-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 70px;
    align-items: center;
}
@media (max-width: 768px) {
    .main-content {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }
    nav ul {
        justify-content: center;
    }
}
.booking-form,
.booking-details {
    background-color: #fff;
    border: 1px solid #ddd;
    padding: 25px;
    border-radius: 5px;
    float: left;
}
.booking-form h3 {
    margin: 10px 0px;
}
.booking-form .input-group {
    margin: 10px 0;
}
.f-class {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.plus-minus-btn {
    color: #3352f2;
    font-size: 30px;
    padding: 2px;
    margin-top: 10px;
    word-spacing: 20px;
}
.booking-form .calculations {
    margin: 10px 0;
}
.booking-form .calculations p {
    font-weight: 500;
    margin-bottom: 10px;
}
.booking-form input {
    padding: 10px;
    border-radius: 5px;
    border: none;
    background: #f3f5ff;
    border-radius: 4px;
    margin: 10px 0;
}
.booking-form .inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}
.booking-content {
    color: #fff;
    width: 80%;
}
@media (max-width: 768px) {
    .booking-content {
        width: 100%;
    }
}
.booking-content h1 {
    font-size: 70px;
    text-transform: uppercase;
    font-family: 'Bebas Neue', cursive;
    font-weight: 400;
    margin-bottom: 25px;
}

.btn-style {
    display: block;
    width: 100%;
    padding: 10px;
    border-radius: 5px;
    border: none;
    color: #fff;
    font-weight: 500;
    background-color: #3352f2;
}
.amount {
    display: flex;
    justify-content: space-between;
}

.booking-details {
    display: none;
}
.w-100 {
    width: 100%;
}

.btn {
    padding: 10px 19px;
    background-color: #3352f2;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}
.mx-10 {
    margin-right: 10px !important;
    margin-left: 10px !important;
}
table {
    border-collapse: collapse;
}
.table-bordered {
    border: 1px solid #dee2e6;
}

.table {
    width: 100%;
    margin-bottom: 1rem;
    background-color: transparent;
}
.table-bordered td,
.table-bordered th {
    border: 1px solid #dee2e6;
}

.table td,
.table th {
    padding: 0.75rem;
    vertical-align: top;
}

.twopx td {
    vertical-align: top;
    border-top: 2px solid #dee2e6;
}
.strong {
    font-weight: 600;
}

.booking-details header {
    text-align: center;
    margin-bottom: 20px;
}

.booking-details header h3 {
    margin-bottom: 15px;
}

.warning {
    color: red;
    text-align: center;
}