.asp-button {
    position: fixed;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    border: none;
    border-radius: 0;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    cursor: pointer;
    writing-mode: sideways-lr;
    text-orientation: upright;
    z-index: 9999;
}
.asp-panel {
    position: fixed;
    right: 0;
    top: 0;
    height: 100%;
    width: 500px;
    max-width: 90%;
    box-shadow: -2px 0 8px rgba(0,0,0,0.3);
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 9998;
    padding: 24px;
}
.asp-panel.open { transform: translateX(0); }
.asp-header { display: flex; justify-content: space-between; align-items: center; padding: 1rem; border-bottom: 1px solid #ddd; }
@media (prefers-reduced-motion: reduce) { .asp-panel { transition: none; } }