/* Navigation Erweiterungen */
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.student-name {
    font-weight: 500;
    color: #4b5563;
}

/* Profil Header */
.profile-header {
    text-align: center;
    margin-bottom: 3rem;
}

.profile-header .avatar {
    margin-bottom: 1rem;
}

.profile-header h1 {
    margin-bottom: 1rem;
}

/* Präsentations-Grid */
.presentation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 1rem;
}

/* Präsentations-Karten */
.presentation-card {
    background: white;
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    transition: transform 0.2s;
}

.presentation-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.presentation-image {
    position: relative;
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.presentation-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.presentation-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.875rem;
    font-weight: 500;
    background-color: var(--blue-primary);
    color: white;
}

.presentation-badge.new {
    background-color: var(--green-primary);
}

.presentation-content {
    padding: 1.5rem;
}

.presentation-content h2 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    text-align: left;
}

.date {
    color: #6b7280;
    font-size: 0.875rem;
    margin-bottom: 0.75rem;
}

.description {
    color: #4b5563;
    margin-bottom: 1rem;
    font-size: 0.925rem;
}

/* Tags */
.tags {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.tag {
    background-color: #f3f4f6;
    color: #4b5563;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
}

/* Button */
.button {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: var(--blue-primary);
    color: white;
    text-decoration: none;
    border-radius: 0.375rem;
    font-weight: 500;
    transition: background-color 0.2s;
}

.button:hover {
    background-color: #4338ca;
}

/* Responsive Design */
@media (max-width: 768px) {
    .presentation-grid {
        grid-template-columns: 1fr;
        padding: 0.5rem;
    }

    .profile-header {
        margin-bottom: 2rem;
    }
}