.plane-container {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 9999;
    overflow: hidden;
}

.paper-plane {
    position: absolute;
    width: min(56px, 8vw);
    height: auto;
    aspect-ratio: 1 / 1;
    background: transparent;
    border: 0;
    padding: 0;
    cursor: pointer;
    pointer-events: auto;
    filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.15));
    will-change: transform;
    opacity: 0;
    transition: opacity 0.3s ease;
    outline: none;
    box-shadow: none;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    user-select: none;
    transform:
        translate3d(var(--plane-x, 0px), var(--plane-y, 0px), 0)
        rotate(var(--plane-angle, 0deg))
        scale(var(--plane-scale, 1));
    transform-origin: 50% 50%;
}

.paper-plane.visible {
    opacity: 1;
}

.paper-plane:focus {
    outline: none;
}

.paper-plane:focus-visible {
    outline: 2px solid rgba(19, 127, 236, 0.75);
    outline-offset: 6px;
}

.user-is-tabbing .paper-plane:focus {
    outline: 2px solid rgba(19, 127, 236, 0.75);
    outline-offset: 6px;
}

.paper-plane:active {
    outline: none;
}

.paper-plane {
    display: block;
}

.paper-plane path {
    fill: #f0f0f0;
    stroke: #4a4a4a;
    stroke-width: 1.5;
    stroke-linejoin: round;
}

.paper-plane path[fill="none"] {
    fill: none;
}

.trail-dot {
    position: absolute;
    width: 6px;
    height: 6px;
    background-color: #d1d5db;
    border-radius: 50%;
    pointer-events: none;
    will-change: transform, opacity;
    opacity: var(--trail-alpha, 0.6);
    transform: scale(1);
    transition: opacity 1s linear, transform 1s linear;
}

#theme-switch-overlay {
    position: fixed;
    inset: 0;
    z-index: 10001;
    opacity: 0;
    transform: scale(1);
    pointer-events: none;
    transition: opacity 600ms cubic-bezier(0.22, 0.61, 0.36, 1), transform 600ms cubic-bezier(0.22, 0.61, 0.36, 1);
}

#theme-switch-overlay.active {
    opacity: 1;
    transform: scale(1.02);
}

#theme-stage.plane-theme-transition {
    transition: opacity 600ms cubic-bezier(0.22, 0.61, 0.36, 1), transform 600ms cubic-bezier(0.22, 0.61, 0.36, 1);
    will-change: opacity, transform;
    transform: translateZ(0) scale(1);
    transform-origin: 50% 50%;
}

#theme-stage.plane-stage-hidden {
    opacity: 0;
    transform: translateZ(0) scale(0.95);
}

@media (prefers-reduced-motion: reduce) {
    #theme-switch-overlay,
    #theme-stage.plane-theme-transition {
        transition: opacity 300ms ease;
        will-change: opacity;
    }

    #theme-switch-overlay.active {
        transform: none;
    }

    #theme-stage.plane-stage-hidden {
        transform: none;
    }
}