body {
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    background: #f6f7f9;
    color: #222;
}

header {
    background: #1f2937;
    color: white;
    padding: 1rem 2rem;
    font-size: 1.2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.container {
    display: flex;
    max-width: 1200px;
    margin: auto;
}

nav {
    width: 260px;
    background: #ffffff;
    border-right: 1px solid #ddd;
    padding: 1rem;
    font-size: 0.95rem;
}

    nav ul {
        list-style: none;
        padding-left: 0;
    }

    nav li {
        margin-bottom: 0.4rem;
    }

    nav a {
        text-decoration: none;
        color: #1f2937;
    }

        nav a.active {
            font-weight: bold;
        }

main {
    flex: 1;
    padding: 2rem;
    background: #ffffff;
}

h1, h2 {
    color: #1f2937;
}

.module-goal {
    background: #eef2ff;
    border-left: 4px solid #6366f1;
    margin-bottom: 1rem;
    text-align: right;
    padding: 0.3rem;
}

.helper-box {
    background: #f9fafb;
    border: 1px solid #ddd;
    margin-top: 2rem;
    padding-left: 1rem;
}

.navigation {
    display: flex;
    justify-content: space-between;
    margin-top: 0.5rem;
    font-size: 0.9rem;
}

.navigation1 {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
}

nav a.active {
    font-weight: bold;
    color: #2563eb;
}

p:has(img) {
    text-align: center;
    font-style: italic;
}