* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: #f1fbf4;
    color: #123222;
}

/* Header */

.top-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    background: linear-gradient(90deg, #5bbf7a, #7bd99a);
    color: #fff;
}

.logo-wrap {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo {
    height: 60px;
    width: auto;
    border-radius: 16px;
    background: #ffffff55;
    padding: 4px;
}

.title-block h1 {
    margin: 0;
    font-size: 1.5rem;
}

.title-block p {
    margin: 0;
    font-size: 0.9rem;
}

/* Navigation */

.nav-bar {
    background: #e0f7e7;
    padding: 8px 12px;
}

.nav-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-list li {
    margin: 0;
}

.nav-link {
    display: inline-block;
    padding: 8px 14px;
    border-radius: 999px;
    background: #ffffff;
    color: #225738;
    text-decoration: none;
    font-size: 0.95rem;
    box-shadow: 0 2px 6px rgba(0,0,0,0.08);
}

.nav-link:hover {
    background: #f1fff4;
}

.nav-link.active {
    background: #5bbf7a;
    color: #fff;
}

/* Hauptbereich */

.main {
    max-width: 1000px;
    margin: 0 auto;
    padding: 16px;
}

.card {
    background: #ffffff;
    border-radius: 18px;
    padding: 16px 18px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.08);
    margin-bottom: 16px;
}

.card h2 {
    margin-top: 0;
}

/* Whiteboard-Boxen */

.box-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.box {
    flex: 1 1 220px;
    background: #f7fff9;
    border-radius: 16px;
    border: 1px solid #c8ebcf;
    padding: 10px 12px;
    font-size: 1.05rem;
}

.box h3 {
    margin-top: 0;
}

.badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 12px;
    background: #e8fbe8;
    font-size: 0.8rem;
    margin-left: 4px;
}

/* Footer */

.footer {
    text-align: center;
    padding: 12px;
    font-size: 0.8rem;
    color: #345444;
    background: #dff4e5;
    margin-top: 16px;
}

/* Mobile */

@media (max-width: 768px) {
    .top-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    .nav-list {
        flex-direction: column;
        align-items: stretch;
    }
    .nav-link {
        text-align: center;
    }
}