body {
    font-family: "HelveticaNeue-Light", "Helvetica Neue Light", "Helvetica Neue", Helvetica, Arial, "Lucida Grande", sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 20px;
    max-width: 900px;
    margin: 0 auto;
    background-color: #f5f9ff;
}

.content-margin-container {
    display: flex;
    width: 100%;
    justify-content: center;
    align-items: flex-start;
}

.main-content-block {
    width: 130%;
    max-width: 1100px;
    background-color: #fff;
    border-left: 1px solid #DDD;
    border-right: 1px solid #DDD;
    padding: 16px;
}

.margin-left-block, .margin-right-block {
    font-size: 14px;
    width: 10%;
    max-width: 100px;
    position: relative;
    margin-left: 5px;
    text-align: left;
    padding: 5px;
}

.margin-left-block {
    position: sticky;
    top: 20px;
}

h1 {
    font-size: 32px;
    font-family: 'Courier New', Courier, monospace;
    margin-top: 4px;
    margin-bottom: 10px;
    text-align: center;
}

h2 {
    font-size: 18px;
    color: #666;
}

a {
    color: #0e7862;
    text-decoration: none;
}

a:hover {
    color: #0a5a4a;
    text-decoration: underline;
}

a:focus {
    outline: 2px solid #0e7862;
    outline-offset: 2px;
}

.header {
    font-weight: 300;
    font-size: 17px;
    text-align: center;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: auto;
}

#languageSelector {
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 5px 10px;
    border: 1px solid #0e7862;
    border-radius: 4px;
    background-color: white;
    color: #0e7862;
    cursor: pointer;
    font-size: 14px;
}

#languageSelector:hover {
    background-color: #f0f0f0;
}

#languageSelector:focus {
    outline: 2px solid #0e7862;
    outline-offset: 2px;
}

.profile-image {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    margin: 20px auto;
}

.side-menu {
    list-style-type: none;
    padding: 0;
}

.side-menu li {
    margin-bottom: 10px;
}

.document-link {
    display: inline-block;
    margin-top: 10px;
    padding: 8px 15px;
    background-color: #0e7862;
    color: white;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.document-link:hover {
    background-color: #0a5a4a;
    color: white;
}

.document-link:focus {
    outline: 2px solid #0e7862;
    outline-offset: 2px;
}

.experience-item {
    margin-bottom: 30px;
}

.article-date {
    color: #666;
    font-style: italic;
    font-size: 14px;
}

/* Responsive Design - Media Queries */
@media screen and (max-width: 768px) {
    body {
        padding: 10px;
    }

    .content-margin-container {
        flex-direction: column;
    }

    .margin-left-block {
        position: static;
        width: 100%;
        max-width: 100%;
        margin-bottom: 20px;
        border-bottom: 1px solid #DDD;
        padding-bottom: 10px;
    }

    .side-menu {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        justify-content: center;
    }

    .side-menu li {
        margin-bottom: 0;
    }

    .main-content-block {
        width: 100%;
        max-width: 100%;
        border-left: none;
        border-right: none;
    }

    .margin-right-block {
        display: none;
    }

    h1 {
        font-size: 24px;
    }

    h2 {
        font-size: 16px;
    }

    .profile-image {
        width: 150px;
        height: 150px;
    }

    #languageSelector {
        position: fixed;
        top: 5px;
        right: 5px;
        z-index: 1000;
    }
}

@media screen and (max-width: 480px) {
    h1 {
        font-size: 20px;
    }

    .profile-image {
        width: 120px;
        height: 120px;
    }

    .document-link {
        display: block;
        text-align: center;
    }
}