:root {
    --grid-unit: 1rem;
    --border-radius-base: 0.5rem;
}

[data-theme="light"] {
    --color-bg: #ffffff;
    --color-fg: #000000;
}

[data-theme="dark"] {
    --color-bg: #000000;
    --color-fg: #ffffff;
}

body {
    background-color: var(--color-bg);
    color: var(--color-fg);
    font-family: sans-serif;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    transition: background-color 0.3s, color 0.3s;
}

.container {
    text-align: center;
}

.toggle-switch {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 60px;
    height: 34px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    transition: .4s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: #2196F3;
}

input:checked + .slider:before {
    transform: translateX(26px);
}