body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body.lang-en {
    font-family: 'Ubuntu', sans-serif;
}
body.lang-bn {
    font-family: 'Noto Serif Bengali', serif;
}

.fade-in {
    animation: fadeIn 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(15px); }
    to { opacity: 1; transform: translateY(0); }
}

.slider-container {
    position: relative;
    width: 100%;
    background-image: radial-gradient(#cbd5e1 1px, transparent 1px);
    background-size: 20px 20px;
}

.slider-track {
    display: flex;
    transition: transform 0.6s cubic-bezier(0.25, 1, 0.5, 1);
}

.slide {
    min-width: 100%;
    flex-shrink: 0;
}

.card-hover {
    transition: all 0.3s ease;
}
.card-hover:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
}

#math-vis-path {
    transition: d 0.05s linear;
    filter: drop-shadow(0 0 3px rgba(76, 29, 149, 0.4));
}

.katex-display {
    margin: 0.5em 0 !important;
    overflow-x: auto;
    overflow-y: hidden;
}

.article-content p {
    margin-bottom: 1rem;
    line-height: 1.7;
}

.mobile-menu-enter {
    animation: slideDown 0.2s ease-out forwards;
}
@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

input:focus, textarea:focus {
    box-shadow: 0 0 0 2px rgba(26, 54, 93, 0.1);
}