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

body {
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 16px;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    background-attachment: fixed;
}

.container {
    max-width: 860px;
    margin: 40px auto;
    padding: 0 20px;
    background-color: #fff;
    border: 1px solid #ddd;
}

header {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 36px 40px;
}

.avatar {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
}

.header-text h1 {
    font-size: 2rem;
    font-weight: bold;
    letter-spacing: 0.02em;
}

.subtitle {
    font-size: 1rem;
    color: #666;
    margin-top: 4px;
}

nav {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    padding: 0 40px;
}

nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0;
}

nav ul li a {
    display: block;
    padding: 12px 10px;
    color: #fff;
    text-decoration: none;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 0.8rem;
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

nav ul li a:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

main {
    padding: 0 40px 40px;
}

section {
    padding-top: 36px;
}

section + section {
    border-top: 1px solid #e0e0e0;
    margin-top: 8px;
}

h2 {
    font-size: 1.25rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 16px;
    color: #333;
}

h3 {
    font-size: 1rem;
    font-weight: bold;
    margin: 20px 0 4px;
}

p {
    margin-bottom: 8px;
}

ul {
    list-style: disc;
    padding-left: 20px;
}

ul ul {
    margin-top: 4px;
    list-style: circle;
}

a {
    color: #1a5276;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

pre {
    background-color: #f8f8f8;
    border: 1px solid #ddd;
    border-left: 3px solid #333;
    padding: 16px 20px;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.875rem;
    line-height: 1.5;
    margin-top: 8px;
}

footer {
    text-align: center;
    padding: 20px 40px;
    border-top: 2px solid #333;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 0.875rem;
    color: #666;
}

footer a {
    color: #1a5276;
}

@media (max-width: 600px) {
    header {
        flex-direction: column;
        text-align: center;
        padding: 24px 20px;
    }

    nav {
        padding: 0 20px;
    }

    nav ul {
        justify-content: center;
    }

    main {
        padding: 0 20px 32px;
    }

    footer {
        padding: 16px 20px;
    }
}