.birthday-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 9999;
    overflow: hidden;
    contain: strict;
}

.birthday-symbol {
    position: fixed;
    top: 0;
    left: 0;
    animation: birthday-rise linear infinite forwards;
    opacity: 0.95;
    z-index: 40;
    pointer-events: none; 
}

.birthday-sway {
    will-change: transform;
    animation-name: birthday-sway;
    animation-timing-function: ease-in-out;
    animation-iteration-count: infinite;
    animation-direction: alternate;
}

.birthday-inner {
    pointer-events: auto; /* Allow hover over the actual item */
    cursor: crosshair;
    display: inline-block;
}

/* MARK: Balloon Size */
.birthday-symbol img {
    width: 18vh;
    height: auto;
    max-width: 100px;
    object-fit: contain;
}

.birthday-confetti-wrapper {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 30;
    will-change: transform;
    animation-name: birthday-confetti-fall;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
    pointer-events: none;
}

.birthday-confetti {
    width: 8px;
    height: 16px;
    background-color: rgb(0, 0, 0);
    will-change: transform;
    animation-name: birthday-flutter;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
}

.birthday-confetti.circle {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.birthday-confetti.square {
    width: 8px;
    height: 8px;
}

.birthday-confetti.triangle {
    width: 10px;
    height: 10px;
    clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
}

@keyframes birthday-rise {
    0% { transform: translate3d(var(--x-pos, 0vw), 110vh, 0) rotate(var(--start-rot, 0deg)); opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { transform: translate3d(var(--x-pos, 0vw), -20vh, 0) rotate(calc(var(--start-rot, 0deg) * -1)); opacity: 0; }
}

@keyframes birthday-confetti-fall {
    0% { transform: translate3d(var(--x-pos, 0vw), -10vh, 0); }
    100% { transform: translate3d(var(--x-pos, 0vw), 110vh, 0); }
}

@keyframes birthday-sway {
    0% { transform: translateX(calc(var(--sway-amount, 50px) * -1)); }
    100% { transform: translateX(var(--sway-amount, 50px)); }
}

@keyframes birthday-flutter {
    0% { transform: rotate3d(var(--rx, 1), var(--ry, 1), var(--rz, 0), 0deg); }
    100% { transform: rotate3d(var(--rx, 1), var(--ry, 1), var(--rz, 0), var(--rot-dir, 360deg)); }
}

@keyframes birthday-pop {
    0% { transform: scale(1); opacity: 1; filter: brightness(1); }
    30% { transform: scale(1.3); opacity: 1; filter: brightness(1.5); }
    100% { transform: scale(0); opacity: 0; filter: brightness(2); }
}

.birthday-burst-wrapper {
    position: absolute;
    pointer-events: none;
    z-index: 1000;
    will-change: transform, opacity;
    animation: birthday-burst-y 1.2s cubic-bezier(0.42, 0, 1, 1) forwards;
}

.birthday-burst-confetti {
    will-change: transform;
    animation: birthday-burst-x 1.2s cubic-bezier(0.25, 1, 0.5, 1) forwards;
}

.birthday-burst-confetti.circle {
    border-radius: 50%;
}

.birthday-burst-confetti.triangle {
    width: 10px;
    height: 10px;
    clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
}

@keyframes birthday-burst-y {
    0% {
        transform: translateY(0);
        opacity: 1;
    }
    100% {
        transform: translateY(calc(var(--burst-y) + 150px)); /* Gravity pull downwards */
        opacity: 0;
    }
}

@keyframes birthday-burst-x {
    0% {
        transform: translateX(0) rotate3d(var(--rx), var(--ry), var(--rz), 0deg);
    }
    100% {
        transform: translateX(calc(var(--burst-x) * 1.5)) rotate3d(var(--rx), var(--ry), var(--rz), var(--rot-dir));
    }
}