#to_top_scrollup {
    /* 1. Hintergrund & Blur (iPhone Style) */
    background: rgba(255, 255, 255, 0.12) !important;
    backdrop-filter: blur(15px) !important;
    -webkit-backdrop-filter: blur(15px) !important;
    
    /* 2. Form & Schimmer-Effekt */
    border-radius: 50% !important;
    border: 0px solid rgba(0, 211, 160, 0.4) !important; 
    
    /* 3. Sichtbarkeit & Schatten */
    opacity: 1 !important;
    box-shadow: 0 1px 6px 0 rgba(0, 211, 160, 0.15) !important;
    
    /* 4. Farbe & Zentrierung */
    color: #00d3a0 !important;
    display: flex !important;
    align-items: center;
    justify-content: center;
    text-align: center;

    /* 5. Fixe Abmessungen */
    box-sizing: border-box;
    bottom: 20px;
    right: 20px;
    height: 50px;
    width: 50px;
    position: fixed;
    z-index: 9999;
    cursor: pointer;

    /* 6. AUTO-HIDE TRANSITION (Sanftes Ein-/Ausblenden) */
    transition: opacity 0.4s ease-in-out, transform 0.4s ease-in-out, background 0.3s ease !important;
}

/* Hover-Effekt mit Schimmer-Verstärkung */
#to_top_scrollup:hover {
    background: rgba(255, 255, 255, 0.2) !important;
    border: 0px solid rgba(0, 211, 160, 0.8) !important;
    box-shadow: 0 2px 12px 0 rgba(0, 211, 160, 0.3) !important;
    transform: translateY(-5px) !important; /* Etwas stärkeres Anheben beim Hover */
}

/* Stellt sicher, dass das Icon im Button mitskaliert */
#to_top_scrollup img {
    width: 100%;
    height: auto;
}

/* Barrierefreiheit */
.screen-reader-text {
    clip: rect(1px, 1px, 1px, 1px);
    height: 1px;
    overflow: hidden;
    position: absolute !important;
    width: 1px;
    word-wrap: normal !important;
}