:root {
    --background-color: #f0f0f0;
    --main-accent-color: #4a90e2;
    --text-color: #333;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

body.dark-mode {
    --background-color: #2c2c2c;
    --main-accent-color: #8a4afe;
    --text-color: #f0f0f0;
    --shadow-color: rgba(255, 255, 255, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background-color: var(--background-color);
    background-image: url('data:image/svg+xml,%3Csvg width="100" height="100" viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"%3E%3Cg fill="%23d0d0d0" fill-opacity="0.1"%3E%3Crect x="0" y="0" width="100" height="100"/%3E%3C/g%3E%3C/svg%3E');
    transition: background-color 0.3s ease;
}

.theme-switch-wrapper {
    position: absolute;
    top: 20px;
    right: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-color);
    transition: color 0.3s ease;
}

.theme-switch em {
    font-size: 0.9em;
}

.theme-switch {
    display: inline-block;
    height: 34px;
    position: relative;
    width: 60px;
}

.theme-switch input {
    display: none;
}

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

.slider:before {
    background-color: #fff;
    bottom: 4px;
    content: "";
    height: 26px;
    left: 4px;
    position: absolute;
    transition: .4s;
    width: 26px;
}

input:checked + .slider {
    background-color: var(--main-accent-color);
}

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

.slider.round {
    border-radius: 34px;
}

.slider.round:before {
    border-radius: 50%;
}