body {
    font-family: 'Roboto', sans-serif;
    margin: 0;
    padding: 0;
    text-align: center;
    background-color: #f8f9fa;
    color: #333;
}

header {
    background: url('https://images.unsplash.com/photo-1556911073-52527ac43768?ixlib=rb-1.2.1&auto=format&fit=crop&w=1950&q=80') no-repeat center center/cover;
    color: white;
    padding: 20px 0;
    position: relative;
    overflow: hidden;
}

nav {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

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

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s;
}

nav ul li a:hover {
    color: #adb5bd;
}

.hero-content {
    padding: 100px 20px;
    max-width: 800px;
    margin: 0 auto;
}

header h1 {
    margin: 0;
    font-size: 3em;
    animation: fadeIn 2s ease-in-out;
}

header p {
    margin: 10px 0 0;
    font-size: 1.5em;
    animation: slideIn 2s ease-in-out;
}

section {
    padding: 60px 20px;
    max-width: 1000px;
    margin: 0 auto;
}

#about {
    background-color: #ffffff;
    border-bottom: 1px solid #ddd;
}

#features {
    background-color: #f1f3f5;
    border-bottom: 1px solid #ddd;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
}

.feature-item {
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 10px;
    padding: 20px;
    width: 300px;
    margin: 20px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

.feature-item:hover {
    transform: translateY(-10px);
}

.feature-item i {
    font-size: 2em;
    margin-bottom: 10px;
}

.feature-item:nth-child(odd) i {
    color: #28a745; /* Green for allergen-free */
}

.feature-item:nth-child(even) i {
    color: #dc3545; /* Red for no-buy */
}

#how-it-works {
    background-color: #ffffff;
    border-bottom: 1px solid #ddd;
}

.steps {
    display: flex;
    justify-content: space-around;
}

.step {
    text-align: center;
    margin: 20px;
}

.step i {
    font-size: 2em;
    margin-bottom: 10px;
}

#testimonials {
    background-color: #f1f3f5;
    border-bottom: 1px solid #ddd;
}

.testimonials {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.testimonial {
    margin: 20px;
    padding: 20px;
    border: 1px solid #ddd;
    border-radius: 10px;
    background-color: #fff;
    width: 80%;
}

.author {
    margin-top: 10px;
    font-weight: bold;
}

#pricing {
    background-color: #ffffff;
    border-bottom: 1px solid #ddd;
}

.pricing-plans {
    display: flex;
    justify-content: space-around;
}

.plan {
    border: 1px solid #ddd;
    border-radius: 10px;
    padding: 20px;
    width: 300px;
    margin: 20px;
    text-align: center;
    background-color: #f8f9fa;
}

.plan h3 {
    margin: 0;
}

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

button {
    margin-top: 20px;
    padding: 10px 20px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.3s;
}

button:hover {
    background-color: #0056b3;
    transform: scale(1.05);
}

form {
    display: flex;
    flex-direction: column;
    align-items: center;
}

label {
    margin-top: 10px;
    align-self: flex-start;
}

input, textarea {
    width: 100%;
    max-width: 500px;
    padding: 10px;
    margin: 5px 0;
    border: 1px solid #ccc;
    border-radius: 4px;
    transition: border-color 0.3s;
}

input:focus, textarea:focus {
    border-color: #495057;
}

footer {
    background-color: #343a40;
    color: white;
    padding: 20px 0;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes slideIn {
    from {
        transform: translateX(-100%);
    }
    to {
        transform: translateX(0);
    }
}

@keyframes zoomIn {
    from {
        transform: scale(0.5);
    }
    to {
        transform: scale(1);
    }
}

.fade-in {
    animation: fadeIn 2s ease-in-out;
}

.slide-in {
    animation: slideIn 2s ease-in-out;
}

.zoom-in {
    animation: zoomIn 1s ease-in-out;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2em;
    }

    header p {
        font-size: 1.2em;
    }

    nav ul {
        flex-direction: column;
    }

    nav ul li {
        margin: 10px 0;
    }

    .feature-item {
        width: 80%;
        margin: 20px auto;
    }

    .steps {
        flex-direction: column;
    }

    .step {
        width: 80%;
        margin: 20px auto;
    }

    .pricing-plans {
        flex-direction: column;
    }

    .plan {
        width: 80%;
        margin: 20px auto;
    }
}