header {
    background-color: #f0f7f3f3; /* white background */
    color: #27ae60; /* green text */
    padding: 20px;
    text-align: center;
    font-family: Arial, sans-serif;
    border-bottom: 5px solid white; /* Darker green border */
}

.search-bar {
    margin-top: 10px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.search-bar input[type="text"] {
    width: 300px;
    padding: 10px;
    border: 2px solid #27ae60;
    border-radius: 5px;
    outline: none;
}

.search-bar button {
    background-color: #27ae60;
    color: #ffffff;
    border: none;
    padding: 10px 15px;
    margin-left: 5px;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.search-bar button:hover {
    background-color: #1e8449; /* Darker green on hover */
}

.search-bar i {
    font-size: 16px;
}

h1 i {
    color: #ffffff; /* White icon */
}

.btn btn-primary {
    background-color: #27ae60;
    color: #ffffff;
    border: none;
    padding: 10px 15px;
    margin-left: 5px;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

@media screen and (max-width: 768px) {
    header {
        padding: 15px;
        font-size: 1rem;
    }
    .search-bar {
        flex-direction: column;
        align-items: stretch;
    }
    .search-bar input[type="text"] {
        width: 100%;
        margin-bottom: 8px;
    }
    .search-bar button {
        width: 100%;
        margin-left: 0;
    }
}

@media screen and (max-width: 480px) {
    header {
        padding: 10px;
        font-size: 0.95rem;
    }
    h1 {
        font-size: 1.2em;
    }
    .search-bar input[type="text"] {
        padding: 8px;
        font-size: 0.95em;
    }
    .search-bar button {
        padding: 8px 10px;
        font-size: 0.95em;
    }
}