* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Cairo, sans-serif;
    line-height: 1.6;
    background-color: #ffffff;
}

header {
    background-color: #21C84E;
    color: #fff;
    text-align: center;
    padding: 15px 0;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

header img {
    max-width: 100px;
    height: auto;
    margin-bottom: 10px;
}

header h1 {
    margin: 0;
}

.separator {
    display: none;
}

main {
    max-width: 550px;
    margin: 20px auto;
    padding: 0 20px;
}

.step {
    display: none;
    text-align: center;
    margin-top: 20px;
}

.material-button {
    background-color: #21C84E;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    margin-right: 10px;
}

.material-button:hover {
    background-color: #178c39;
}

.material-input {
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 16px;
    margin-bottom: 10px;
}

.material-input:focus {
    outline: none;
    border-color: #21C84E;
    box-shadow: 0 0 5px rgba(33, 200, 78, 0.5);
}

.button-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    margin-top: 10px;
}

.next-button {
    margin-left: auto;
}

@media (min-width: 801px) {
    .header-content {
        flex-direction: row;
        justify-content: center;
        align-items: center;
    }

    header img {
        margin-bottom: 0;
        margin-right: 10px;
    }

    header h1 {
        margin-top: 0;
    }

    .separator {
        display: inline-block;
    }
}