body {
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.card {
    border-radius: 0.5rem;
}

.navbar .nav-link.active {
    font-weight: 600;
}

html, body {
    height: 100%;
}
body {
    display: flex;
    flex-direction: column;
}
main.container {
    flex: 1 0 auto;
}
footer {
    flex-shrink: 0;
}
.create-post-form {
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    padding-top: 0;
    padding-bottom: 0;
    transition: max-height 0.3s ease, opacity 0.3s ease, padding 0.3s ease;
}

.create-post-form.active {
    max-height: 500px;
    opacity: 1;
    padding-top: 1rem;
    padding-bottom: 1rem;
}