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

body {
    font-family: 'Segoe UI', sans-serif;
    background-color: #f9f9f9;
    color: #333;
    line-height: 1.6;
}

.hero {
    background-color: #27c757;
    color: white;
    text-align: center;
    padding: 2rem 1rem;
    position: relative;
}

.lang-toggle {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(255,255,255,0.2);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    text-decoration: none;
    font-size: 0.9rem;
}

.container {
    max-width: 960px;
    margin: auto;
    padding: 2rem 1rem;
}

.course-info ul,
.lesson ul {
    padding-left: 1.5rem;
    margin-top: 0.5rem;
}

.lesson {
    margin-bottom: 2rem;
}

.footer {
    text-align: center;
    padding: 1rem;
    background: #ddd;
    font-size: 0.9rem;
}

.tuition {
    margin-top: 2rem;
    padding: 1.5rem;
    background-color: #fffbe9;
    border-left: 5px solid #c72d27;
    border-radius: 6px;
}

.tuition h2 {
    color: #c72d27;
}

.highlight {
    background-color: #fff3cd;
    padding: 0.8rem;
    border-radius: 4px;
    margin-top: 0.5rem;
    font-weight: bold;
}