* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.test-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    padding: 10px;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0.35;
    transition: opacity 0.3s ease;
    z-index: 10;
}

.test-nav:hover,
.test-nav:focus-within {
    opacity: 1;
}

.nav-btn {
    display: inline-block;
    text-decoration: none;
    border-radius: 6px;
}

.home-btn {
    padding: 6px 14px;
    background: #3B82F6;
    color: #ffffff;
    font-family: Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
}

.home-btn:hover {
    background: #2563EB;
}

.swatch {
    width: 26px;
    height: 26px;
    border: 2px solid rgba(255, 255, 255, 0.7);
}

.swatch.active {
    border-color: #FFD700;
    box-shadow: 0 0 6px #FFD700;
}