/* === Общие стили с текстурой === */
body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    color: #333;

    /* фон с мягкой текстурой через CSS-паттерн */
    background-color: #f0f4f8;
    background-image: repeating-linear-gradient(
        45deg,
        rgba(255, 255, 255, 0.05),
        rgba(255, 255, 255, 0.05) 1px,
        transparent 1px,
        transparent 10px
    );
    background-size: 20px 20px;
}

/* === Ссылки === */
a {
    color: #0066cc;
    text-decoration: none;
    transition: color 0.3s;
}
a:hover {
    color: #004499;
}

/* === Header / Навигация === */
header {
    background: rgba(255, 255, 255, 0.95);
    padding: 20px 15px;
    border-bottom: 1px solid #ddd;
    box-shadow: 0 1px 6px rgba(0,0,0,0.08);
}

header h1 {
    margin: 0 0 10px 0;
    font-size: 26px;
}

nav {
    font-size: 14px;
}
nav a {
    margin-right: 15px;
}

/* === Main Content === */
main {
    padding: 25px 20px;
    max-width: 1000px;
    margin: 20px auto;
    background: rgba(255, 255, 255, 0.97);
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    border-radius: 10px;
}

h2 {
    margin-top: 30px;
    margin-bottom: 15px;
    font-size: 22px;
    color: #222;
}

h3 {
    margin-top: 20px;
    font-size: 18px;
}

p, ul, ol {
    margin-bottom: 15px;
}

ul {
    padding-left: 20px;
}

/* === Таблицы === */
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 25px;
    font-size: 14px;
    background: #ffffff;
    border-radius: 4px;
    overflow: hidden;
}
table th, table td {
    padding: 10px;
    border: 1px solid #ccc;
    text-align: left;
}
table th {
    background: #f5f5f5;
    font-weight: bold;
}

/* === Footer === */
footer {
    text-align: center;
    font-size: 13px;
    color: #666;
    padding: 15px;
    border-top: 1px solid #ddd;
    background: rgba(250, 250, 250, 0.95);
    margin-top: 20px;
}

/* === Адаптивность === */
@media screen and (max-width: 768px) {
    header h1 {
        font-size: 22px;
    }
    nav {
        font-size: 13px;
    }
    h2 {
        font-size: 20px;
    }
    table, th, td {
        font-size: 12px;
    }
    main {
        padding: 15px 10px;
        margin: 15px;
    }
}