#theme-toggle {
    position: fixed;
    right: 1.2rem;
    bottom: 1.4rem;
    width: 44px;
    height: 44px;
    border-radius: 999px;
    border: 2px solid var(--border-soft);
    background: linear-gradient(145deg, var(--bg-card) 0%, var(--bg-card-soft) 100%);
    color: var(--text-heading);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    cursor: pointer;
    box-shadow: var(--shadow-card);
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
    z-index: 120;
}

#theme-toggle:hover {
    transform: translateY(-2px) scale(1.03);
    box-shadow: var(--shadow-card-hover);
    border-color: var(--accent);
    color: var(--accent);
}

#theme-toggle:active {
    transform: translateY(0) scale(0.97);
    box-shadow: var(--shadow-card);
}

#theme-toggle:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
}