.theme-switch {
    position: fixed;
    top: 14px;
    right: 14px;
    z-index: 200;
    display: inline-flex;
    padding: 4px;
    gap: 4px;
    border-radius: 999px;
    background: var(--surface-elevated);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.theme-switch-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    border: none;
    border-radius: 999px;
    background: transparent;
    color: var(--text-muted);
    font-family: inherit;
    font-size: 0.78rem;
    font-weight: 700;
    cursor: pointer;
    transition: background var(--transition), color var(--transition), box-shadow var(--transition);
    white-space: nowrap;
}

.theme-switch-btn:hover {
    color: var(--text-dark);
    background: var(--surface-hover);
}

.theme-switch-btn.is-active {
    background: var(--nav-active-bg);
    color: var(--nav-active-color);
    box-shadow: var(--nav-active-shadow);
}

.theme-switch-text {
    line-height: 1;
}

@media (max-width: 520px) {
    .theme-switch {
        top: auto;
        bottom: 16px;
        right: 12px;
    }

    .theme-switch-text {
        display: none;
    }

    .theme-switch-btn {
        padding: 10px 12px;
        font-size: 1rem;
    }
}