/* ================================
   Präsentations-Embed Section
   ================================ */

.praesentation-section {
    background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    padding: var(--spacing-4xl) 0;
}

.slides-embed {
    position: relative;
    width: 100%;
    max-width: 1200px;
    margin: var(--spacing-2xl) auto 0;
    aspect-ratio: 16 / 9;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-2xl);
    background: var(--color-gray-900);
    border: 1px solid var(--color-gray-200);
}

.slides-embed iframe {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    border: 0;
    display: block;
}

.slides-embed-controls {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

.slides-embed-controls .btn-fullscreen {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--primary-color);
    color: var(--text-white);
    border: none;
    border-radius: var(--radius-md);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-base);
    cursor: pointer;
    text-decoration: none;
    transition: background var(--transition-base), transform var(--transition-base);
}

.slides-embed-controls .btn-fullscreen:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.slides-embed-controls .btn-fullscreen.btn-secondary {
    background: var(--color-white);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.slides-embed-controls .btn-fullscreen.btn-secondary:hover {
    background: var(--primary-lighter);
}

.slides-hint {
    text-align: center;
    color: var(--text-light);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-md);
}

.slides-hint kbd {
    display: inline-block;
    padding: 2px 6px;
    background: var(--color-gray-100);
    border: 1px solid var(--color-gray-300);
    border-bottom-width: 2px;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.85em;
    color: var(--text-secondary);
    margin: 0 2px;
}

@media (max-width: 768px) {
    .slides-embed {
        border-radius: var(--radius-md);
    }
    .slides-embed-controls {
        flex-direction: column;
        align-items: stretch;
        padding: 0 var(--spacing-md);
    }
}