/* Custom CSS for the loader */
.loader {
    width: 60px;
    aspect-ratio: 2;
    --_g: no-repeat radial-gradient(circle closest-side,#000 90%,#0000);
    background: var(--_g) 0%   50%, var(--_g) 50%  50%, var(--_g) 100% 50%;
    background-size: calc(100%/3) 50%;
    animation: l3 1s infinite linear;
    margin: 0 auto;
}
@keyframes l3 {
    20%{background-position:0%   0%, 50%  50%,100%  50%}
    40%{background-position:0% 100%, 50%   0%,100%  50%}
    60%{background-position:0%  50%, 50% 100%,100%   0%}
    80%{background-position:0%  50%, 50%  50%,100% 100%}
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    50% { transform: translateX(5px); }
    75% { transform: translateX(-5px); }
}

.animate-shake {
    animation: shake 0.5s ease-in-out;
}

.button-loader {
    border: 2px solid #f3f3f3;
    border-top: 2px solid #3498db;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}