html, body {
    height: 100%;
    margin: 0;
}

body {
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    padding-top: 7%;
}

.fixed {
    -ms-flex: 0 0 300px;
    flex: 0 0 300px;
    min-width: 300px;
}

.hover-effect {
    transition: opacity 0.3s ease;
}

.hover-effect:hover {
    opacity: 0.8;
}

.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
}

.theme-light .dark-logo {
    display: none;
}

.theme-dark .light-logo {
    display: none;
}