body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
    background-color: #f8f9fa;
}
header {
    text-align: center;
    margin-bottom: 3rem;
}
h1 {
    color: #007074;
    margin-bottom: 0.5rem;
}
.tagline {
    font-size: 1.2rem;
    color: #666;
}
section {
    background: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}
h2 {
    border-bottom: 2px solid #007074;
    padding-bottom: 0.5rem;
    margin-top: 0;
    color: #004D40;
}
ul {
    padding-left: 1.5rem;
}
footer {
    text-align: center;
    font-size: 0.9rem;
    color: #888;
    margin-top: 3rem;
}
.nav {
    margin-bottom: 2rem;
    text-align: center;
}
.nav a {
    margin: 0 1rem;
    text-decoration: none;
    color: #007074;
    font-weight: bold;
}
.nav a:hover {
    text-decoration: underline;
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}
.feature-card {
    border: 1px solid #eee;
    padding: 1rem;
    border-radius: 4px;
}
.lang-toggle {
    text-align: right;
    margin-bottom: 1rem;
}
.lang-toggle a {
    text-decoration: none;
    border: 1px solid #007074;
    color: #007074;
    padding: 0.3rem 0.6rem;
    border-radius: 4px;
    font-size: 0.9rem;
}
.lang-toggle a:hover {
    background: #007074;
    color: #fff;
}