#home section, #links section, #guestbook section, {
    width: 100%;
    box-sizing: border-box;
}

.pop-in {
    animation: bubbleIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

.pop-out {
    animation: bubblePop 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

@keyframes bubblePop {
    0% { transform: scale(1); opacity: 1; }
    20% { transform: scale(1.1); }
    100% { transform: scale(0); opacity: 0; }
}

@keyframes bubbleIn {
    0% { transform: scale(0); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}