/* Duolingo-style dots loader */
.dots-loader { display: inline-flex; align-items: center; justify-content: center; gap: 3px; height: 1em; line-height: 1; vertical-align: middle; }
.dot { width: 5px; height: 5px; background-color: currentColor; border-radius: 50%; animation: duolingo-bounce 0.8s infinite ease-in-out; }
.dot:nth-child(2) { animation-delay: 0.2s; }
.dot:nth-child(3) { animation-delay: 0.4s; }
@keyframes duolingo-bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}
.button-loading { pointer-events: none !important; opacity: 0.8 !important; }