:root {
    --bg-color: #1a1a1a;
    --glow-color: #8b0000;
    --spinner-border-color: white;
    --footer-text: #ffffff6e;
}

html.light {
    --bg-color: #f0f0f0;
    --glow-color: #7d93a1;
    --spinner-border-color: black;
    --footer-text: #333333;
}

body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    margin: 0;
    padding: 0;
    background-color: var(--bg-color);
    overflow-x: hidden;
    transition: background-color 0.4s ease;
    font-size: 16px;
    font-family: system-ui, sans-serif;
}

button {
    cursor: pointer;
    transition: all 0.2s;
    border: 2px solid var(--spinner-border-color);
    border-radius: 8px;
    background: #8b0000;
    color: white;
}

.icon-button {
    border: 0;
    background: transparent;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cornerBtnWrapper {
    position: absolute;
    top: 10px;
    right: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    background: rgba(255, 255, 255, 0.15);
    padding: 10px;
    border-radius: 50px;
    backdrop-filter: blur(8px);
}

.icon-button {
    display: flex;
    align-items: center;
    justify-content: center;
    border: 0;
    background: transparent;
    padding: 0;
    margin: 0;
    line-height: 0;
}

.corner-icon {
    display: block;
    width: 32px;
    height: 32px;
    cursor: pointer;
    transition: transform 0.2s;
}

.corner-icon:hover {
    transform: scale(1.15);
}

.hidden {
    display: none;
}

.setting-group {
    margin-bottom: 32px;
}

.setting-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 500;
}

.speed-control {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: inherit;
}

.speed-control label {
    font-size: 1.1rem;
    opacity: 0.9;
}

.speed-slider {
    width: 320px;
    accent-color: #8b0000;
}

html.light .speed-slider {
    accent-color: #600000;
}

.speed-value {
    font-family: monospace;
    font-size: 1.1rem;
    min-width: 3ch;
}

.tinytext {
    font-size: 0.85rem;
    opacity: 0.7;
    text-align: center;
}