html {
    scroll-behavior: smooth;
}

body {
    background: #181313;
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
}

/* Linke Sidebar (rot markierter Bereich) */
.presentation-sidebar {
    width: 260px;
    min-width: 260px;
    background: #1a1515;
    border-right: 2px solid rgba(212, 160, 23, 0.6);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    box-shadow: 4px 0 24px rgba(0,0,0,0.4);
}

.presentation-sidebar-inner {
    padding: 24px 16px;
    height: 100%;
    overflow-y: auto;
}

.presentation-sidebar-title {
    color: #d4a017;
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin: 0 0 20px 0;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(212, 160, 23, 0.4);
}

.presentation-menu {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.presentation-menu-btn {
    display: block;
    padding: 12px 14px;
    background: rgba(40, 35, 35, 0.9);
    color: #e8d4a0 !important;
    text-decoration: none !important;
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: 8px;
    border: 1px solid rgba(212, 160, 23, 0.4);
    transition: background 0.2s, color 0.2s, border-color 0.2s, transform 0.15s;
    text-align: left;
    line-height: 1.3;
}

.presentation-menu-btn:hover {
    background: rgba(212, 160, 23, 0.25);
    color: #fff !important;
    border-color: #d4a017;
    transform: translateX(4px);
}

.presentation-menu-btn:visited {
    color: #e8d4a0 !important;
}

/* Rechter scrollbarer Inhalt – Sektionen ohne Lücke verbunden */
.presentation-content {
    flex: 1;
    margin-left: 260px;
    padding: 0 24px 0;
    max-width: 100%;
    display: flex;
    flex-direction: column;
    gap: 0;
    font-size: 0;
    line-height: 0;
}

.presentation-section {
    margin: 0;
    padding: 0;
    scroll-margin-top: 0;
    display: block;
    font-size: 0;
    line-height: 0;
}

.img-container {
    width: 100%;
    margin: 0;
    padding: 0;
    line-height: 0;
    font-size: 0;
}

.img-container img {
    max-width: 720px;
    width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
    padding: 0;
    vertical-align: top;
}