:root {
    --primary-color: #2c3e50;
    --text-color: #34495e;
    --bg-color: #f8f9fa;
    --container-bg: #ffffff;
    --border-radius: 8px;
    --spacing-unit: 1.5rem;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    margin: 0;
    padding: 0;
}

.container {
    max-width: 800px;
    margin: 2rem auto;
    padding: 2rem;
    background: var(--container-bg);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

h1, h2, h3 {
    color: var(--primary-color);
    margin-top: 2rem;
}

h1 {
    text-align: center;
    border-bottom: 2px solid #eee;
    padding-bottom: 1rem;
    margin-top: 0;
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

ul {
    padding-left: 1.5rem;
}

li {
    margin-bottom: 0.5rem;
}

a {
    color: #3498db;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.footer {
    text-align: center;
    margin-top: 3rem;
    padding-top: 1rem;
    border-top: 1px solid #eee;
    font-size: 0.9rem;
    color: #7f8c8d;
}

@media (max-width: 600px) {
    .container {
        margin: 1rem;
        padding: 1.5rem;
    }
}

/* Language Switcher */
.lang-switch {
    position: absolute;
    top: 1rem;
    right: 2rem;
    background: #fff;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    font-size: 0.9rem;
}

.lang-switch a {
    color: var(--text-color);
    margin: 0 0.3rem;
    font-weight: 500;
}

.lang-switch a.active {
    color: var(--primary-color);
    font-weight: bold;
    text-decoration: underline;
}

.container {
    position: relative; /* For lang switch positioning context if needed, though absolute above is to body usually, let's keep it simple and put it inside container or body */
}