vaadin-app-layout::part(navbar) {
    border-bottom: 1px solid var(--lumo-contrast-10pct);
}

#add-task-fab {
    position: fixed;
    left: 50%;
    transform: translateX(-50%);
    bottom: 26px;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 78px;
    height: 78px;
    border-radius: 50%;
    background-color: #03a9f4;
    border: none;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 1000;
}

#fab:hover {
    background-color: #29b6f6;
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.4);
    transform: scale(1.05);
}

#fab:active {
    transform: scale(0.95);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

#fab:focus {
    outline: none;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3), 0 0 0 3px rgba(3, 169, 244, 0.3);
}